Toshiba Air Conditioner Rav Sm2802dt Tr User Manual
FILE NO. A10-001  
Revised: May, 2010  
SERVICE MANUAL  
SPLIT TYPE  
INDOOR UNIT <DIGITAL INVERTER>  
RAV-SM2242DT-E  
RAV-SM2802DT-E  
RAV-SM2242DT-TR  
RAV-SM2802DT-TR  
R410A  
PRINTED IN JAPAN, Apr., 2010 ToMo  
Original instruction  
Please read carefully through these instructions that contain important information which complies with the  
“Machinery” Directive (Directive 2006/42/EC), and ensure that you understand them.  
Some of the details provided in these instructions differ from the service manual, and the instructions provided  
here take precedence.  
Generic Denomination: Air Conditioner  
Definition of Qualified Installer or Qualified Service Person  
The air conditioner must be installed, maintained, repaired and removed by a qualified installer or qualified  
service person.  
When any of these jobs is to be done, ask a qualified installer or qualified service person to do them for you.  
A qualified installer or qualified service person is an agent who has the qualifications and knowledge  
described in the table below.  
Agent  
Qualified  
Qualifications and knowledge which the agent must have  
• The qualified installer is a person who installs, maintains, relocates and removes the air  
conditioners made by Toshiba Carrier Corporation.  
installer (∗1)  
He or she has been trained to install, maintain, relocate and remove the air conditioners made by  
Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such operations by  
an individual or individuals who have been trained and is thus thoroughly acquainted with the  
knowledge related to these operations.  
• The qualified installer who is allowed to do the electrical work involved in installation, relocation  
and removal has the qualifications pertaining to this electrical work as stipulated by the local laws  
and regulations, and he or she is a person who has been trained in matters relating to electrical  
work on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has  
been instructed in such matters by an individual or individuals who have been trained and is thus  
thoroughly acquainted with the knowledge related to this work.  
• The qualified installer who is allowed to do the refrigerant handling and piping work involved in  
installation, relocation and removal has the qualifications pertaining to this refrigerant handling  
and piping work as stipulated by the local laws and regulations, and he or she is a person who  
has been trained in matters relating to refrigerant handling and piping work on the air conditioners  
made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such  
matters by an individual or individuals who have been trained and is thus thoroughly acquainted  
with the knowledge related to this work.  
• The qualified installer who is allowed to work at heights has been trained in matters relating to  
working at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively,  
he or she has been instructed in such matters by an individual or individuals who have been  
trained and is thus thoroughly acquainted with the knowledge related to this work.  
Qualified service • The qualified service person is a person who installs, repairs, maintains, relocates and removes  
the air conditioners made by Toshiba Carrier Corporation. He or she has been trained to install,  
repair, maintain, relocate and remove the air conditioners made by Toshiba Carrier Corporation or,  
alternatively, he or she has been instructed in such operations by an individual or individuals who  
have been trained and is thus thoroughly acquainted with the knowledge related to these operations.  
person (∗1)  
• The qualified service person who is allowed to do the electrical work involved in installation,  
repair, relocation and removal has the qualifications pertaining to this electrical work as stipulated  
by the local laws and regulations, and he or she is a person who has been trained in matters  
relating to electrical work on the air conditioners made by Toshiba Carrier Corporation or,  
alternatively, he or she has been instructed in such matters by an individual or individuals who  
have been trained and is thus thoroughly acquainted with the knowledge related to this work.  
• The qualified service person who is allowed to do the refrigerant handling and piping work  
involved in installation, repair, relocation and removal has the qualifications pertaining to this  
refrigerant handling and piping work as stipulated by the local laws and regulations, and he or  
she is a person who has been trained in matters relating to refrigerant handling and piping  
work on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she  
has been instructed in such matters by an individual or individuals who have been trained  
and is thus thoroughly acquainted with the knowledge related to this work.  
• The qualified service person who is allowed to work at heights has been trained in matters  
relating to working at heights with the air conditioners made by Toshiba Carrier Corporation or,  
alternatively, he or she has been instructed in such matters by an individual or individuals who  
have been trained and is thus thoroughly acquainted with the knowledge related to this work.  
– 3 –  
Definition of Protective Gear  
When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective  
gloves and ‘safety’ work clothing.  
In addition to such normal protective gear, wear the protective gear described below when undertaking the  
special work detailed in the table below.  
Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns,  
electric shocks and other injuries.  
Work undertaken  
All types of work  
Protective gear worn  
Protective gloves  
“Safety” working clothing  
Gloves to provide protection for electricians and from heat  
Insulating shoes  
Electrical-related work  
Clothing to provide protection from electric shock  
Work done at heights (50 cm or more)  
Transportation of heavy objects  
Repair of outdoor unit  
Helmets for use in industry  
Shoes with additional protective toe cap  
Gloves to provide protection for electricians and from heat  
The important contents concerned to the safety are described on the product itself and on this Service Manual.  
Please read this Service Manual after understanding the described items thoroughly in the following contents  
(Indications/Illustrated marks), and keep them.  
[Explanation of indications]  
Indication  
Explanation  
Indicates contents assumed that an imminent danger causing a death or serious injury of  
the repair engineers and the third parties when an incorrect work has been executed.  
DANGER  
Indicates possibilities assumed that a danger causing a death or serious injury of the  
repair engineers, the third parties, and the users due to troubles of the product after work  
when an incorrect work has been executed.  
WARNING  
CAUTION  
Indicates contents assumed that an injury or property damage (∗) may be caused on the  
repair engineers, the third parties, and the users due to troubles of the product after work  
when an incorrect work has been executed.  
∗ Property damage : Enlarged damage concerned to property, furniture, and domestic animal/pet  
[Explanation of illustrated marks]  
Mark  
Explanation  
Indicates prohibited items (Forbidden items to do)  
The sentences near an illustrated mark describe the concrete prohibited contents.  
Indicates mandatory items (Compulsory items to do)  
The sentences near an illustrated mark describe the concrete mandatory contents.  
Indicates cautions (Including danger/warning)  
The sentences or illustration near or in an illustrated mark describe the concrete cautious contents.  
– 4 –  
Warning Indications on the Air Conditioner Unit  
[Confirmation of warning label on the main unit]  
Confirm that labels are indicated on the specified positions  
If removing the label during parts replace, stick it as the original.  
Warning indication  
Description  
WARNING  
WARNING  
ELECTRICAL SHOCK HAZARD  
Disconnect all remote electric power supplies  
before servicing.  
ELECTRICAL SHOCK HAZARD  
Disconnect all remote electric  
power supplies before servicing.  
WARNING  
WARNING  
Moving parts.  
Do not operate unit with grille removed.  
Stop the unit before the servicing.  
Moving parts.  
Do not operate unit with grille removed.  
Stop the unit before the servicing.  
CAUTION  
CAUTION  
High temperature parts.  
You might get burned when removing this panel.  
High temperature parts.  
You might get burned when removing  
this panel.  
CAUTION  
CAUTION  
Do not touch the aluminum fins of the unit.  
Doing so may result in injury.  
Do not touch the aluminum fins of the unit.  
Doing so may result in injury.  
CAUTION  
CAUTION  
BURST HAZARD  
Open the service valves before the operation,  
otherwise there might be the burst.  
BURST HAZARD  
Open the service valves before the  
operation, otherwise there might be the  
burst.  
– 5 –  
Precaution for Safety  
WARNING  
Before starting to repair the air conditioner, read carefully through the Service Manual, and repair  
the air conditioner by following its instructions.  
Only qualified service person (∗1) is allowed to repair the air conditioner.  
Repair of the air conditioner by unqualified person may give rise to a fire, electric shocks, injury,  
water leaks and/or other problems.  
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to carry out the electrical  
work of the air conditioner.  
Under no circumstances must this work be done by an unqualified individual since failure to carry  
out the work properly may result in electric shocks and/or electrical leaks.  
Wear protective gloves and safety work clothing during installation, servicing and removal.  
When connecting the electrical wires, repairing the electrical parts or undertaking other electrical  
jobs, wear gloves to provide protection for electricians and from heat, insulating shoes and  
clothing to provide protection from electric shocks.  
Failure to wear this protective gear may result in electric shocks.  
Use wiring that meets the specifications in the Installation Manual and the stipulations in the local  
regulations and laws.  
Use of wiring which does not meet the specifications may give rise to electric shocks, electrical  
leakage, smoking and/or a fire.  
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to undertake work at  
heights using a stand of 50 cm or more or to remove the intake grille of the indoor unit to  
undertake work.  
General  
When working at heights, use a ladder which complies with the ISO 14122 standard, and follow  
the procedure in the ladder’s instructions.  
Also wear a helmet for use in industry as protective gear to undertake the work.  
When working at heights, put a sign in place so that no-one will approach the work location,  
before proceeding with the work.  
Parts and other objects may fall from above, possibly injuring a person below.  
Do not touch the aluminum fin of the outdoor unit.  
You may injure yourself if you do so. If the fin must be touched for some reason, first put on  
protective gloves and safety work clothing, and then proceed.  
Do not climb onto or place objects on top of the outdoor unit.  
You may fall or the objects may fall off of the outdoor unit and result in injury.  
When transporting the air conditioner, wear shoes with additional protective toe caps.  
When transporting the air conditioner, do not take hold of the bands around the packing carton.  
You may injure yourself if the bands should break.  
This air conditioner has passed the pressure test as specified in IEC 60335-2-40 Annex EE.  
DENGER  
Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit  
breaker to the OFF position. Otherwise, electric shocks may result.  
Before opening the intake grille of the indoor unit or service panel of the outdoor unit, set the  
circuit breaker to the OFF position.  
Failure to set the circuit breaker to the OFF position may result in electric shocks through contact  
with the interior parts.  
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to remove the intake grille  
of the indoor unit or service panel of the outdoor unit and do the work required.  
Turn off  
breaker.  
Before starting to repair the outdoor unit fan or fan guard, be absolutely sure to set the circuit  
breaker to the OFF position, and place a “Work in progress” sign on the circuit breaker.  
When cleaning the filter or other parts of the indoor unit, set the circuit breaker to OFF without  
fail, and place a “Work in progress” sign near the circuit breaker before proceeding with the work.  
– 6 –  
Even if the circuit breaker has been set to the OFF position before the service panel is removed  
and the electrical parts are repaired, you will still risk receiving an electric shock.  
For this reason, short-circuit the high-voltage capacitor terminals to discharge the voltage before  
proceeding with the repair work.  
For details on the short-circuiting procedure, refer to the Service Manual.  
You may receive an electric shock if the voltage stored in the capacitors has not been sufficiently  
discharged.  
Execute  
discharge  
between  
terminals.  
Place a “Work in progress” sign near the circuit breaker while the installation, maintenance, repair  
or removal work is being carried out.  
There is a danger of electric shocks if the circuit breaker is set to ON by mistake.  
Prohibition  
If, in the course of carrying out repairs, it becomes absolutely necessary to check out the  
electrical parts with the electrical parts box cover of one or more of the indoor units and the  
service panel of the outdoor unit removed in order to find out exactly where the trouble lies, wear  
insulated heat-resistant gloves, insulated boots and insulated work overalls, and take care to  
avoid touching any live parts.  
You may receive an electric shock if you fail to heed this warning. Only qualified service person  
(∗1) is allowed to do this kind of work.  
Stay on  
protection  
WARNING  
Before troubleshooting or repair work, check the earth wire is connected to the earth terminals of  
the main unit, otherwise an electric shock is caused when a leak occurs.If the earth wire is not  
correctly connected, contact an electric engineer for rework.  
After completing the repair or relocation work, check that the ground wires are connected properly.  
Check earth  
wires.  
Be sure to connect earth wire. (Grounding work) Incomplete grounding causes an electric shock.  
Do not connect ground wires to gas pipes, water pipes, and lightning rods or ground wires for  
telephone wires.  
Do not modify the products.Do not also disassemble or modify the parts.  
It may cause a fire, electric shock or injury.  
Prohibition of  
modification.  
When any of the electrical parts are to be replaced, ensure that the replacement parts satisfy the  
specifications given in the Service Manual (or use the parts contained on the parts list in the  
Service Manual).  
Use specified Use of any parts which do not satisfy the required specifications may give rise to electric shocks,  
parts.  
smoking and/or a fire.  
If, in the course of carrying out repairs, it becomes absolutely necessary to check out the  
electrical parts with the electrical parts box cover of one or more of the indoor units and the  
service panel of the outdoor unit removed in order to find out exactly where the trouble lies, place  
"Keep out" signs around the work site before proceeding.  
Do not bring  
a child close to  
Third-party individuals may enter the work site and receive electric shocks if this warning is not  
the equipment. heeded.  
Connect the cut-off lead wires with crimp contact, etc, put the closed end side upward and then  
apply a water-cut method, otherwise a leak or production of fire is caused at the users’ side.  
Insulating  
measures  
When performing repairs using a gas burner, replace the refrigerant with nitrogen gas because  
the oil that coats the pipes may otherwise burn.  
When repairing the refrigerating cycle, take the following measures.  
1) Be attentive to fire around the cycle.  
When using a gas stove, etc, be sure to put out fire before work; otherwise the oil mixed with  
refrigerant gas may catch fire.  
2) Do not use a welder in the closed room.  
No fire  
When using it without ventilation, carbon monoxide poisoning may be caused.  
3) Do not bring inflammables close to the refrigerant cycle, otherwise fire of the welder may catch  
the inflammables.  
– 7 –  
The refrigerant used by this air conditioner is the R410A.  
Check the used refrigerant name and use tools and materials of the parts which match with it.  
For the products which use R410A refrigerant, the refrigerant name is indicated at a position on  
the outdoor unit where is easy to see.  
To prevent miss-charging, the route of the service port is changed from one of the former R22.  
For an air conditioner which uses R410A, never use other refrigerant than R410A.  
For an air conditioner which uses other refrigerant (R22, etc.), never use R410A.  
If different types of refrigerant are mixed, abnormal high pressure generates in the refrigerating  
cycle and an injury due to breakage may be caused.  
Do not charge refrigerant additionally.  
If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in the  
refrigerating cycle changes resulted in change of air conditioner characteristics or refrigerant over  
the specified standard amount is charged and an abnormal high pressure is applied to the inside  
of the refrigerating cycle resulted in cause of breakage or injury.  
Therefore if the refrigerant gas leaks, recover the refrigerant in the air conditioner, execute  
vacuuming, and then newly recharge the specified amount of liquid refrigerant.  
In this time, never charge the refrigerant over the specified amount.  
Refrigerant  
When recharging the refrigerant in the refrigerating cycle, do not mix the refrigerant or air other  
than R410A into the specified refrigerant.  
If air or others is mixed with the refrigerant, abnormal high pressure generates in the refrigerating  
cycle resulted in cause of injury due to breakage.  
After installation work, check the refrigerant gas does not leak.  
If the refrigerant gas leaks in the room, poisonous gas generates when gas touches to fire such  
as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.  
Never recover the refrigerant into the outdoor unit.  
When the equipment is moved or repaired, be sure to recover the refrigerant with recovering device.  
The refrigerant cannot be recovered in the outdoor unit; otherwise a serious accident such as  
breakage or injury is caused.  
After repair work, surely assemble the disassembled parts, and connect and lead the removed  
wires as before.  
Perform the work so that the cabinet or panel does not catch the inner wires.  
If incorrect assembly or incorrect wire connection was done, a disaster such as a leak or fire is  
caused at user’s side.  
Assembly/  
Cabling  
After the work has finished, be sure to use an insulation tester set (500V Megger) to check the  
resistance is 2MΩ or more between the charge section and the non-charge metal section  
(Earth position).  
Insulator  
check  
If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s side.  
When the refrigerant gas leaks during work, execute ventilation.  
If the refrigerant gas touches to a fire, poisonous gas generates.  
A case of leakage of the refrigerant and the closed room full with gas is dangerous because a  
shortage of oxygen occurs. Be sure to execute ventilation.  
Ventilation  
When the refrigerant gas leaks, find up the leaked position and repair it surely.  
If the leaked position cannot be found up and the repair work is interrupted, pump-down and  
tighten the service valve, otherwise the refrigerant gas may leak into the room.  
The poisonous gas generates when gas touches to fire such as fan heater, stove or cocking stove  
though the refrigerant gas itself is innocuous.  
When installing equipment which includes a large amount of charged refrigerant such as a multi  
air conditioner in a sub-room, it is necessary that the density does not the limit even if the  
refrigerant leaks.  
If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is caused.  
Tighten the flare nut with a torque wrench in the specified manner.  
Excessive tighten of the flare nut may cause a crack in the flare nut after a long period, which may  
result in refrigerant leakage.  
Compulsion  
Nitrogen gas must be used for the airtight test.  
The charge hose must be connected in such a way that it is not slack.  
For the installation/moving/reinstallation work, follow to the Installation Manual.  
If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock or  
fire is caused.  
– 8 –  
Once the repair work has been completed, check for refrigerant leaks, and check the insulation  
resistance and water drainage.  
Then perform a trial run to check that the air conditioner is running properly.  
After repair work has finished, check there is no trouble. If check is not executed, a fire, electric  
shock or injury may be caused. For a check, turn off the power breaker.  
Check after  
repair  
After repair work (installation of front panel and cabinet) has finished, execute a test run to check  
there is no generation of smoke or abnormal sound.  
If check is not executed, a fire or an electric shock is caused. Before test run, install the front  
panel and cabinet.  
Check the following matters before a test run after repairing piping.  
• Connect the pipes surely and there is no leak of refrigerant.  
• The valve is opened.  
Running the compressor under condition that the valve closes causes an abnormal high  
pressure resulted in damage of the parts of the compressor and etc. and moreover if there is  
leak of refrigerant at connecting section of pipes, the air is suctioned and causes further  
abnormal high pressure resulted in burst or injury.  
Do not  
operate the  
unit with the  
valve closed.  
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to relocate the air  
conditioner. It is dangerous for the air conditioner to be relocated by an unqualified individual  
since a fire, electric shocks, injury, water leakage, noise and/or vibration may result.  
Check the following items after reinstallation.  
1) The earth wire is correctly connected.  
2) The power cord is not caught in the product.  
3) There is no inclination or unsteadiness and the installation is stable.  
If check is not executed, a fire, an electric shock or an injury is caused.  
Check after  
reinstallation  
When carrying out the pump-down work shut down the compressor before disconnecting the  
refrigerant pipe.  
Disconnecting the refrigerant pipe with the service valve left open and the compressor still  
operating will cause air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to  
an abnormally high level, and possibly resulting in reputing, injury, etc.  
When the service panel of the outdoor unit is to be opened in order for the compressor or the  
area around this part to be repaired immediately after the air conditioner has been shut down, set  
the circuit breaker to the OFF position, and then wait at least 10 minutes before opening the  
service panel.  
If you fail to heed this warning, you will run the risk of burning yourself because the compressor  
pipes and other parts will be very hot to the touch. In addition, before proceeding with the repair  
work, wear the kind of insulated heat-resistant gloves designed to protect electricians.  
When the service panel of the outdoor unit is to be opened in order for the fan motor, reactor,  
Cooling check inverter or the areas around these parts to be repaired immediately after the air conditioner has  
been shut down, set the circuit breaker to the OFF position, and then wait at least 10 minutes  
before opening the service panel.  
If you fail to heed this warning, you will run the risk of burning yourself because the fan motor,  
reactor, inverter heat sink and other parts will be very hot to the touch.  
In addition, before proceeding with the repair work, wear the kind of insulated heat-resistant  
gloves designed to protect electricians.  
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to install the air  
conditioner. If the air conditioner is installed by an unqualified individual, a fire, electric shocks,  
injury, water leakage, noise and/or vibration may result.  
Before starting to install the air conditioner, read carefully through the Installation Manual, and  
follow its instructions to install the air conditioner.  
Do not install the air conditioner in a location that may be subject to a risk of expire to a  
combustible gas.  
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.  
Install the indoor unit at least 2.5 m above the floor level since otherwise the users may injure  
themselves or receive electric shocks if they poke their fingers or other objects into the indoor unit  
while the air conditioner is running.  
Installation  
Install a circuit breaker that meets the specifications in the installation manual and the stipulations  
in the local regulations and laws.  
Install the circuit breaker where it can be easily accessed by the qualified service person (∗1).  
Do not place any combustion appliance in a place where it is directly exposed to the wind of air  
conditioner, otherwise it may cause imperfect combustion.  
– 9 –  
Explanations given to user  
• If you have discovered that the fan grille is damaged, do not approach the outdoor unit but set the circuit  
breaker to the OFF position, and contact a qualified service person to have the repairs done. Do not set the  
circuit breaker to the ON position until the repairs are completed.  
Relocation  
• Only a qualified installer (∗1) or qualified service person (∗1) is allowed to relocate the air conditioner.  
It is dangerous for the air conditioner to be relocated by an unqualified individual since a fire, electric shocks,  
injury, water leakage, noise and/or vibration may result.  
• When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe.  
Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will  
cause air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level,  
and possibly resulting in reputing, injury, etc.  
(∗1) Refer to the “Definition of Qualified Installer or Qualified Service Person.”  
Declaration of Conformity  
Manufacturer:  
Toshiba Carrier Corporation  
336 Tadehara, Fuji-shi, Shizuoka-ken 416-8521 JAPAN  
Authorized  
Nick Ball  
Representative/TCF holder:  
Toshiba EMEA Engineering Director  
Toshiba Carrier UK Ltd.  
Porsham Close, Belliver Industrial Estate,  
PLYMOUTH, Devon, PL6 7DB.  
United Kingdom  
Hereby declares that the machinery described below:  
Generic Denomination:  
Model/type:  
Air Conditioner  
RAV-SM2242DT-E, RAV-SM2802DT-E  
RAV-SM2242DT-TR, RAV-SM2802DT-TR  
Commercial name:  
Digital Inverter Series  
Complies with the provisions of the “Machinery” Directive (Directive 2006/42/EC) and the regulations  
transposing into national law.  
Complies with the provisions of the following harmonized standard:  
EN 378-2: 2008  
Note: This declaration becomes invalid if technical or operational modifications are introduced without the  
manufacturer’s consent.  
Specifications  
Sound power level (dB)  
Model  
Weight (kg)  
Cooling  
74  
Heating  
74  
RAV-SM2242DT-E  
RAV-SM2802DT-E  
RAV-SM2242DT-TR  
RAV-SM2802DT-TR  
160  
160  
160  
160  
75  
75  
74  
74  
75  
75  
– 10 –  
New Refrigerant (R410A)  
This air conditioner adopts a new HFC type refrigerant (R410A) which does not deplete the ozone layer.  
1. Safety Caution Concerned to New Refrigerant  
The pressure of R410A is high 1.6 times of that of the former refrigerant (R22).  
Accompanied with change of refrigerant, the refrigerating oil has been also changed.  
Therefore, be sure that water, dust, the former refrigerant or the former refrigerating oil is not mixed into the  
refrigerating cycle of the air conditioner with new refrigerant during installation work or service work.  
If an incorrect work or incorrect service is performed, there is a possibility to cause a serious accident.  
Use the tools and materials exclusive to R410A to purpose a safe work.  
2. Cautions on Installation/Service  
1) Do not mix the other refrigerant or refrigerating oil.  
For the tools exclusive to R410A, shapes of all the joints including the service port differ from those of  
the former refrigerant in order to prevent mixture of them.  
2) As the use pressure of the new refrigerant is high, use material thickness of the pipe and tools which are  
specified for R410A.  
3) In the installation time, use clean pipe materials and work with great attention so that water and others  
do not mix in because pipes are affected by impurities such as water, oxide scales, oil, etc.  
Use the clean pipes.  
Be sure to brazing with flowing nitrogen gas. (Never use gas other than nitrogen gas.)  
4) For the earth protection, use a vacuum pump for air purge.  
5) R410A refrigerant is azeotropic mixture type refrigerant.  
Therefore use liquid type to charge the refrigerant. (If using gas for charging, composition of the  
refrigerant changes and then characteristics of the air conditioner change.)  
3. Pipe Materials  
For the refrigerant pipes, copper pipe and joints are mainly used.  
It is necessary to select the most appropriate pipes to conform to the standard.  
Use clean material in which impurities adhere inside of pipe or joint to a minimum.  
1) Copper pipe  
<Piping>  
The pipe thickness, flare finishing size, flare nut and others differ according to a refrigerant type.  
When using a long copper pipe for R410A, it is recommended to select “Copper or copper-base pipe  
without seam” and one with bonded oil amount 40mg/10m or less.  
Also do not use crushed, deformed, discolored (especially inside) pipes.  
(Impurities cause clogging of expansion valves and capillary tubes.)  
<Flare nut>  
Use the flare nuts which are attached to the air conditioner unit.  
2) Joint  
The flare joint and socket joint are used for joints of the copper pipe.  
The joints are rarely used for installation of the air conditioner.  
However clear impurities when using them.  
– 11 –  
4. Tools  
1. Required Tools for R410A  
Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary,  
etc. Accordingly, the tools to be used are classified into the following three types.  
1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))  
2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)  
3) Tools commonly used for R410A and for conventional refrigerant (R22)  
The table below shows the tools exclusive for R410A and their interchangeability.  
Tools exclusive for R410A (The following tools for R410A are required.)  
Tools whose specifications are changed for R410A and their interchangeability  
R410A  
air conditioner installation  
Conventional air  
conditioner installation  
No.  
Used tool  
Usage  
Existence of  
new equipment  
for R410A  
Whether  
conventional equipment  
can be used  
Whether conventional  
equipment can be used  
Flare tool  
Pipe flaring  
Ye s  
Ye s  
Ye s  
Ye s  
∗ (Note)  
∗ (Note)  
N o  
Ye s  
∗ (Note)  
No  

‚
Copper pipe gauge  
for adjusting  
projection margin  
Flaring by  
conventional flare tool  
Torque wrench  
Gauge manifold  
Charge hose  
Tightening of flare nut  
ƒ
„
ꢀ
†
Evacuating, refrigerant  
charge, run check, etc.  
N o  
No  
Vacuum pump adapter Vacuum evacuating  
Ye s  
Ye s  
N o  
Ye s  
Ye s  
Electronic balance for  
Refrigerant charge  
refrigerant charging  
Ye s  
‡
Refrigerant cylinder  
Leakage detector  
Refrigerant charge  
Gas leakage check  
Ye s  
Ye s  
N o  
N o  
No  
ˆ
‰
Ye s  
(Note) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection  
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.  
General tools (Conventional tools can be used.)  
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary  
as the general tools.  
1) Vacuum pump. Use vacuum pump by  
attaching vacuum pump adapter.  
2) Torque wrench  
3) Pipe cutter  
7) Screwdriver (+, –)  
8) Spanner or Monkey wrench  
9) Hole core drill  
4) Reamer  
10) Hexagon wrench (Opposite side 4mm)  
11) Tape measure  
5) Pipe bender  
6) Level vial  
12) Metal saw  
Also prepare the following equipments for other installation method and run check.  
1) Clamp meter  
2) Thermometer  
3) Insulation resistance tester (Megger)  
4) Electroscope  
– 12 –  
1. SPECIFICATIONS  
1-1. Indoor Unit  
1-1-1. Concealed Duct High static pressureType  
Indoor unit  
Model  
RAV-SM2242DT-E  
RAV-SM2242AT8-E  
20.0  
RAV-SM2802DT-E  
RAV-SM2802AT8-E  
23.0  
Outdoor unit  
Cooling capacity  
(kW)  
(kW)  
(V)  
Heating capacity  
22.4  
27.0  
Power supply  
1 phase 220-240V~ 50Hz  
Running current  
Indoor unit  
(A)  
5.25 – 4.81  
1.12  
5.25 – 4.81  
1.12  
Power consumption  
(kW)  
(%)  
Power factor  
97  
97  
Power supply  
(V)  
3 phase 380-415V  
Cooling  
Running current  
Power consumption  
Power factor  
(A)  
9.83 – 9.00  
12.33 – 11.29  
Outdoor unit  
(kW)  
(%)  
6.08  
7.63  
94  
94  
Power consumption  
EER  
(kW)  
7.20 (3.26 – 9.09)  
8.75 (3.36 – 12.76)  
Total  
2.78  
D
2.63  
D
Energy efficiency class *  
Power supply  
(V)  
(A)  
1 phase 220-240V~ 50Hz  
Electrical  
characteristics  
Running current  
Power consumption  
Power factor  
5.25-4.81  
1.12  
5.25-4.81  
1.12  
Indoor unit  
(kW)  
(%)  
97  
97  
Power supply  
(V)  
3 phase 380 – 415V  
Heating  
Running current  
Power consumption  
Power factor  
(A)  
8.68 – 7.95  
11.36 – 10.40  
Outdoor unit  
Total  
(kW)  
(%)  
5.37  
7.03  
94  
94  
Power consumption  
COP  
(kW)  
6.49 (2.57 – 7.45)  
8.15 (2.57 – 11.01)  
3.45  
B
3.31  
C
Energy efficiency class ∗  
Indoor unit  
(A)  
(A)  
15.0  
18.0  
15.0  
20.0  
Maximum  
current  
Outdoor unit  
Appearance  
Main unit  
Zinc hot dipping steel plate  
Height  
Width  
Depth  
(mm)  
(mm)  
(mm)  
(kg)  
470  
1380  
1250  
160  
470  
1380  
1250  
160  
Outer dimension Main unit  
Total weight  
Main unit  
Fan  
Heat exchanger  
Finned tube  
Centrifugal fan  
3600  
Centrifugal fan  
4200  
Standard air flow at 137Pa / (at Mid tap)  
Fan Speed  
(m³/min)  
Fan unit  
Air filter  
1
1
Motor  
(W)  
370 × 3  
370 × 3  
External static pressure (H/M/L)  
(Pa)  
196 / 137 / 69  
None (Local procure)  
196 / 137 / 69  
None (Local procure)  
Controller (Sold Separately)  
Sound pressure level  
Sound power level  
Gas side  
RBC-AMT32E, AMS41E, AS21E2  
H/M/L  
H/M/L  
(dB•A)  
(dB•A)  
(mm)  
54  
74  
55  
75  
28.6  
12.7  
28.6  
12.7  
Connecting pipe Liquid side  
Drain port  
(mm)  
(mm)  
32 (VP25)  
– 13 –  
1-1-1. Concealed Duct High static pressureType (Contined)  
Indoor unit  
Model  
RAV-SM2242DT-TR  
RAV-SM2244AT8-E  
20.0  
RAV-SM2802DT-TR  
RAV-SM2804AT8-E  
23.0  
Outdoor unit  
Cooling capacity  
Heating capacity  
(kW)  
(kW)  
(V)  
22.4  
27.0  
Power supply  
1 phase 220-240V~ 50Hz  
Running current  
Power consumption  
Power factor  
(A)  
5.25 – 4.81  
1.12  
5.25 – 4.81  
1.12  
Indoor unit  
(kW)  
(%)  
97  
97  
Power supply  
(V)  
3 phase 380-415V  
Cooling  
Running current  
Power consumption  
Power factor  
(A)  
9.83 – 9.00  
12.33 – 11.29  
Outdoor unit  
(kW)  
(%)  
6.08  
7.63  
94  
94  
Power consumption  
EER  
(kW)  
7.20 (3.26 – 9.09)  
8.75 (3.36 – 12.76)  
Total  
2.78  
D
2.63  
D
Energy efficiency class *  
Power supply  
(V)  
(A)  
1 phase 220-240V~ 50Hz  
Electrical  
characteristics  
Running current  
Power consumption  
Power factor  
5.25 – 4.81  
1.12  
5.25 – 4.81  
1.12  
Indoor unit  
(kW)  
(%)  
97  
97  
Power supply  
(V)  
3 phase 380-415V  
Heating  
Running current  
Power consumption  
Power factor  
(A)  
8.68 – 7.95  
11.36 – 10.40  
Outdoor unit  
Total  
(kW)  
(%)  
5.37  
7.03  
94  
94  
Power consumption  
COP  
(kW)  
6.49 (2.57 – 7.45)  
8.15 (2.57 – 11.01)  
3.45  
B
3.31  
C
Energy efficiency class ∗  
Indoor unit  
(A)  
(A)  
15.0  
18.0  
15.0  
20.0  
Maximum  
current  
Outdoor unit  
Appearance  
Main unit  
Zinc hot dipping steel plate  
Height  
Width  
Depth  
(mm)  
(mm)  
(mm)  
(kg)  
470  
1380  
1250  
160  
470  
1380  
1250  
160  
Outer dimension Main unit  
Total weight  
Main unit  
Fan  
Heat exchanger  
Finned tube  
Centrifugal fan  
3600  
Centrifugal fan  
4200  
Standard air flow at 137Pa / (at Mid tap)  
Fan Speed  
(m³/min)  
Fan unit  
Air filter  
1
1
Motor  
(W)  
370 × 3  
370 × 3  
External static pressure (H/M/L)  
(Pa)  
196 / 137 / 69  
None (Local procure)  
196 / 137 / 69  
None (Local procure)  
Controller (Sold Separately)  
Sound pressure level  
Sound power level  
Gas side  
RBC-AMT32E, AMS41E, AS21E2  
H/M/L  
H/M/L  
(dB•A)  
(dB•A)  
(mm)  
54  
74  
55  
75  
28.6  
12.7  
28.6  
12.7  
Connecting pipe Liquid side  
Drain port  
(mm)  
(mm)  
32 (VP25)  
– 14 –  
2. CONSTRUCTION VIEWS (EXTERNAL VIEWS)  
2-1. Indoor Unit  
RAV-SM2242DT-E, RAV-SM2802DT-E / RAV-SM2242DT-TR, RAV-SM2802DT-TR  
e r o m o r  
1 0 0  
e r o m o r  
5 0  
9
6 0  
2 5 3  
4
0 8 1 3  
0 1 0  
0 6 1 2  
) h c t i p g n i t u o n m t l o b n g g i a n H (  
0 4 7  
5 4  
1 3  
0 1 5 0 2 0  
e r m r o o 0 0 1 0  
0 2 0  
e r o m o r  
2 0 0  
5 3  
0 3 7  
5 6  
– 15 –  
3. SYSTEMATIC REFRIGERATING CYCLE DIAGRAM  
3-1. Indoor Unit  
RAV-SM2242DT-E, RAV-SM2802DT-E  
RAV-SM2242DT-TR, RAV-SM2802DT-TR  
Distributor  
(Strainer  
incorporated)  
Indoor unit  
TCJ sensor  
Air heat  
exchanger  
TC sensor  
Refrigerant pipe  
at liquid side ØB  
Refrigerant pipe  
at gas side ØA  
Heating  
Cooling  
To outdoor unit  
To outdoor unit  
Dimension table  
Indoor unit  
Outer diameter of refrigerant pipe  
Gas side ØA  
Liquid side ØB  
SM224, SM280 type  
28.6  
12.7  
– 16 –  
4. WIRING DIAGRAM  
4-1. Indoor Unit  
RAV-SM2242DT-E, RAV-SM2802DT-E  
RAV-SM2242DT-TR, RAV-SM2802DT-TR  
– 17 –  
4-2. Fan Characteristics  
Current value as a criterion, adjust the air volume value to become within the range of the chart below.]  
< RAV-SM2242 type >  
Standard air volume: 3600m³/h  
8
7.5  
7
6.5  
High static pressure tap (50Hz)  
6
5.5  
5
Medium static pressure tap (50Hz)  
Low static pressure tap (50Hz)  
4.5  
4
300  
250  
200  
150  
100  
High static pressure tap (50Hz)  
Medium static pressure tap (50Hz)  
Low static pressure tap (50Hz)  
50  
5
2800  
3000  
3400  
3800  
4200 4400  
4000 4320  
2880  
3200  
3600  
Lower limit of air volume  
Air volume (m³/h)  
Upper limit of air volume  
– 18 –  
< RAV-SM2802 type >  
Standard air volume: 4200m³/h  
8.5  
8
7.5  
7
High static pressure tap (50Hz)  
6.5  
6
Medium static pressure tap (50Hz)  
Low static pressure tap (50Hz)  
5.5  
5
4.5  
4
350  
300  
250  
200  
150  
100  
High static pressure tap (50Hz)  
Medium static pressure tap (50Hz)  
50  
5
Low static pressure tap (50Hz)  
3200 3400  
3800  
4200  
4600  
5000 5200  
4800 5040  
3360  
3600  
4000  
4400  
Lower limit of air volume  
Air volume (m³/h)  
Upper limit of air volume  
REQUIREMENT  
Add a air volume damper to the air supply duct, and adjust the air volume in the range from 80% to 120% of  
the standard air volume.  
– 19 –  
n Wire connection change of fan motor  
This duct is composed of 3 fan motors.  
To change external static pressure by duct resistance, connect the 3 connectors of the orange lead wires  
that are connected to the underside of the fan tap changing terminal block to the same number  
(F1, F2 or F3) terminal.  
The wires of the fan motor has been connected to (F2) [External static pressure 137Pa (14mmAq)] as  
factory default.  
Low static pressure (F1)  
YEL: Yellow  
BLU: Blue  
ORG: Orange  
FM  
FM  
FM  
Fan motor  
Fan motor  
Fan motor  
F
1
F
2
F
3
F
4
F
1
F
2
F
3
F
4
F
F
F
1
1
1
F
F
F
2
2
2
F3  
F3  
F3  
F4  
FAN2  
FAN1  
FAN3  
Standard (Middle) static pressure (F2)  
Fan tap changing  
terminal block  
Electrical control box  
FM  
FM  
FM  
Control  
P.C. board  
Fan motor  
Fan motor  
Fan motor  
4P terminal  
block  
F1  
F2  
F
3
F
4
F
1
F2  
F3  
F
4
F4  
3P terminal  
block  
FAN2  
FAN1  
FAN3  
2P terminal  
block  
High static pressure (F3)  
FM  
FM  
Fan motor  
FM  
Fan motor  
Fan motor  
F
1
F2  
F3  
F
4
F
1
F
2
F3  
F4  
F4  
FAN2  
FAN1  
FAN3  
External static pressure  
Pa (mmAq)  
Terminal block No.  
Fan motor wiring  
Remarks  
Yellow  
F1  
F2  
F3  
69 (7)  
Low static pressure  
Blue  
137 (14)  
196 (20)  
Factory default  
Middle static pressure  
Orange  
High static pressure  
∗ Do not use F4.  
NOTE  
When the external static pressure is changed, write down the static pressure once change in the wiring  
diagram of the indoor unit is made.  
– 20 –  
5. SPECIFICATIONS OF ELECTRICAL PARTS  
5-1. Indoor Unit  
RAV-SM2242DT-E, RAV-SM2802DT-E  
RAV-SM2242DT-TR, RAV-SM2802DT-TR  
No.  
1
Parts name  
Fan motor  
Type  
Specifications  
Output (Rated) 370 W  
10 kΩ at 25°C  
STF-200-370-4AR  
2
TA sensor  
TC sensor  
TCJ sensor  
Lead wire length : 818mm  
3
Ø6 size lead wire length : 2000mm Vinyl tube (Black)  
Ø6 size lead wire length : 2000mm Vinyl tube (Red)  
10 kΩ at 25°C  
4
10 kΩ at 25°C  
– 21 –  
6. INDOOR CONTROL CIRCUIT  
6-1. Indoor Controller Block Diagram  
RAV-SM2242DT-E, RAV-SM2802DT-E / RAV-SM2242DT-TR, RAV-SM2802DT-TR  
6-1-1. Connection of Wired (Simple) Remote Controller  
Wired (Simple) Master remote controller  
(Max. 2 units)  
Schedule timer  
Display part  
LCD  
Function  
setup  
Display part  
LCD  
Driver  
LCD  
CPU  
Display part  
LED  
Key switch  
Function  
setup  
CN1  
CN2  
CPU  
Power supply  
circuit  
Key switch  
DC5V  
Remote controller  
communication  
circuit  
*3  
Power supply  
circuit  
Secondary  
battery  
DC5V  
Indoor unit  
#1 (Header)  
A
B
#2  
(Follower)  
A
#3  
(Follower)  
Network adapter (Option)  
B
A
B
Indoor control  
P.C. board  
Network adapter  
P.C. board  
(MCC-1401)  
(MCC-1403)  
Remote controller  
communication  
circuit  
Remote controller  
communication  
circuit  
DC20V  
X
Y
AI net  
communication  
circuit  
EEPROM  
TA sensor  
TC sensor  
TCJ sensor  
Float input  
CPU  
H8/3687  
DC5V  
DC5V  
DC12V  
Power supply  
circuit  
Power supply  
circuit  
Same as  
left ∗2  
Same as  
left ∗2  
Switch  
set  
CPU  
H8/3039  
Transformer  
Driver  
Drain  
pump  
Serial send/  
receive circuit  
Central control  
remote controller  
(Option)  
(Sold separately)  
AC synchronous  
signal input circuit  
Outside  
output  
1
2
3
1
2
3
START  
ALARM  
READY  
Indoor  
fan motor  
Fan motor  
relay circuit  
THERMO ON  
COOL  
HEAT  
FAN  
1
1
2
2
3
3
Transformer  
Outdoor  
unit  
Outdoor  
unit  
Outdoor unit  
Max. 8 units are connectable. ∗1  
∗1 However when mounting a network adapter while 2 wired (simple) remote controllers are connected,  
Max. 7 units are connectable.  
∗2 A network adapter is mounted to only 1 unit.  
∗3 Connection of schedule timer to the simple remote controller is unavailable.  
– 22 –  
6-2. Control Specifications  
No.  
Item  
Outline of specifications  
1) Distinction of outdoor unit  
Remarks  
1
When power  
supply is reset  
When the power supply is reset, the outdoors are distinguished  
and the control is selected according to the distinguished result.  
2
Operation  
mode selection  
1) Based on the operation mode selecting command from the  
remote controller, the operation mode is selected.  
Remote controller  
Control outline  
command  
STOP  
FAN  
Air conditioner stops.  
Fan operation  
COOL  
HEAT  
AUTO  
Cooling operation  
Heating operation  
Ta: Room temp.  
Ts: Setup temp.  
To: Outside temp.  
• COOL/HEAT operation mode is  
automatically selected by Ta, Ts and  
To for operation.  
• The operation is performed as shown  
in the following figure according to Ta  
value at the first time only.  
(In the range of Ts + α –1 < Ta < Ts + α  
+ 1, Setup air volume operation  
continues.)  
Cooling  
operation  
+1.0  
Setup air volume operation  
• Setup air volume  
Ta  
(˚C)  
Ts +  
α
-1.0  
Heating  
operation  
• α is corrected according to the outside temperature.  
Outside temp.  
No To  
Correction value (a)  
K = deg  
0K  
–1K  
0K  
To ≥ 24°C  
24 > To ≥ 18°C  
To < 18°C  
To error  
+1K  
0K  
– 23 –  
No.  
Item  
Outline of specifications  
Remarks  
3
Room temp.  
control  
1) Adjustment range: Remote controller setup temperature (°C)  
COOL  
HEAT  
AUTO  
Wired type  
18 to 29  
18 to 29  
18 to 29  
2) Using the Item code 06, the setup temperature in heating  
operation can be corrected.  
Shift of suction  
temperature in heating  
operation  
Setup data  
0
2
4
6
Setup temp. correction  
+0°C  
+2°C  
+4°C  
+6°C  
Setup air volume operation  
Indoor formation  
Setup data  
2
1-way Air Discharge Cassette Type  
2-way Air Discharge Cassette Type  
Concealed Duct Standard Type  
High Wall Type  
Under Ceiling Type  
Floor Standing Concealed Type  
Floor Standing Type  
0
4
Automatic  
capacity control  
1) Based on the difference between Ta and Ts, the operation  
frequency is instructed to the outdoor unit.  
(GA control)  
2) Cooling operation  
Every 90 seconds, the room temperature difference  
between temperature detected by Ta and Ts and the varied  
room temperature value are calculated to obtain the  
correction value of the frequency command and then the  
present frequency command is corrected.  
Ta (n) – Ts (n) : Room temp. difference  
n
: Counts of detection  
Ta (n-1) – Ts (n) : Varied room temp. value  
n – 1 Counts of detection of 90 seconds before  
3) Heating operation  
:
Every 1 minute (60 sec.), the room temperature  
difference between temperature detected by Ta and Ts  
and the varied room temperature value are calculated to  
obtain the correction value of the frequency command  
and then the present frequency command is corrected.  
Ts (n) – Ta (n)  
n
: Room temp. difference  
: Counts of detection  
Ta (n) – Ta (n – 1): Varied room temp. value  
n – 1  
: Counts of detection of 1 minute before  
NOTE)  
In case that Low volume is set, the maximum frequency is  
restricted to approx. [SB].  
– 24 –  
No.  
Item  
Outline of specifications  
Remarks  
5
Automatic cooling/  
heating control  
1) The judgment of selecting COOL/HEAT is carried out  
as shown below. When exceeding +1.5 against Tsh  
10 minutes and after thermo.-OFF, heating operation  
(Thermo. OFF) exchanges to cooling operation.  
Tsc: Setup temp. in  
cooling operation  
Tsh: Setup temp. in  
heating operation  
+ temp. correction of  
room temp. control  
Description in the parentheses shows an example of  
cooling ON/OFF.  
Cooling  
Ta (˚C)  
+1.5  
(Cooling ON)  
Tsc  
or  
Tsh  
(Cooling OFF)  
-1.5  
Heating  
WWhen –1.5 or more lowers against Tsc 10 minutes  
and after thermo. OFF, cooling operation  
(Thermo. OFF) exchanges to heating operation.  
2) For the automatic capacity control after judgment of  
cooling/heating, see Item 4.  
3) For temperature correction of room temp. control in  
automatic heating, see Item 3.  
6
Cool air discharge  
preventive control  
1) In heating operation, the indoor fan is controlled  
In A zone, [PRE-HEAT  
based on the detected temperature of Tc sensor or Tcj (Heating ready)] is  
sensor. As shown below, the upper limit of the  
revolution frequency is restricted.  
displayed.  
However B zone is assumed as C zone for 6 minutes  
and after when the compressor activated.  
In defrost operation, the control value of Tc or Tcj are  
shifted by 6°C.  
Tc  
Tcj  
(˚C)  
HH  
26  
B zone  
OFF  
16  
A zone  
– 25 –  
No.  
Item  
Outline of specifications  
Remarks  
Tc,Tcj:  
7
Freeze preventive control 1) The cooling operation is performed as follows  
(Low temperature release)  
based on the detected temperature of Tc sensor or  
Tcj sensor.  
When [J] zone is detected for 6 minutes  
Indoor heat exchanger  
sensor temperature  
(Following figure), the commanded frequency is  
decreased from the real operation frequency.  
After then the commanded frequency changes  
every 30 seconds while operation is performed in  
[J] zone.  
In [K] zone, time counting is interrupted and the  
operation is held.  
When [ I ] zone is detected, the timer is cleared  
and the operation returns to the normal operation.  
If the commanded frequency becomes S0  
because the operation continues in [J] zone, the  
return temperature A is raised from 5°C to 12°C  
until [ I ] zone is detected and the indoor fan  
operates with [Fan] mode.  
(˚C)  
A
5
I
K
2
J
In heating operation, the freeze-preventive control  
works if 4-way valve is not exchanged and the  
following conditions are satisfied.  
(However the temperature for J zone dashing  
control is changed from 2°C to –5°C.)  
Tcn:  
Tc temperature when  
5 minutes elapsed after  
activation  
Tc (n – 1):  
<Conditions>  
Tc temperature at start  
time  
• When  
or  
is established 5 minutes after  

‚
activation.  
Tcn ≤ Tc (n – 1) – 5  
Tcn < Tc (n – 1) – 1 and Tcn ≤ Ta < 5°C  

‚
– 26 –  
No.  
Item  
Outline of specifications  
Remarks  
8
High-temp. release  
control  
1) The heating operation is performed as follows based  
on the detected temperature of Tc sensor or Tcj sensor.  
• When [M] zone is detected, the commanded frequency  
is decreased from the real operation frequency.  
After then the commanded frequency changes every  
30 seconds while operation is performed in [M] zone.  
• In [N] zone, the commanded frequency is held.  
• When [L] zone is detected, the commanded fre-  
quency is returned to the original value by approx.  
6Hz every 60 seconds.  
Setup at shipment  
Tc(˚C)  
M
N
Tcj  
A
Control temp. (°C)  
A
B
B
56 (54)  
52 (52)  
L
NOTE:  
When the operation has started or when Tc or Tcj < 30°C Same status as that  
at start of the operation or after operation start,  
temperature is controlled between values in parentheses  
of A and B.  
when “thermostat-OFF”  
9
Drain pump control  
1) In cooling operation, the drain pump is usually  
operated.  
2) If the float switch works while drain pump drives, the  
compressor stops, the drain pump continues the  
operation, and a check code is output.  
(
When drain up kit  
sold separately is  
mounted  
Check code [P10]  
)
3) If the float switch works while drain pump stops, the  
compressor stops and the drain pump operates. If the  
float switch keeps operating for approx. 4 minutes, a  
check code is output.  
10 After-heat  
elimination  
When heating operation stops, in some cases, the indoor  
fan operates with [FAN] for approx. 30 seconds.  
11 HA control  
1) ON/OFF is possible by HA signal input from the  
remote site when it is connected to the wireless  
remote unit or the remote Start/Stop I/F.  
2) ON/OFF status is output to HA output terminal.  
3) HA I/O specification conforms to JEMA Standard.  
Use for remote start/stop  
When using HA terminal  
(CN61), the connecting  
connector sold sepa-  
rately is necessary.  
In a group operation,  
connect it to any of  
master or follower indoor  
unit for use.  
– 27 –  
No.  
Item  
Outline of specifications  
Remarks  
12 Frequency fixed  
operation  
<In case of wired remote controller>  
Approx. command  
frequency [S7]  
1) When pushing [CHK] button for 4 seconds or more,  
[TEST] is displayed on the display screen and the  
mode enters in Test run mode.  
(Test run)  
2) Push [ON/OFF] button.  
3) Using [MODE] button, set the mode to [COOL] or  
[HEAT].  
• Do not use other mode than [COOL]/[HEAT]  
mode.  
• During test run operation, the temperature cannot  
be adjusted.  
• An error is detected as usual.  
• A frequency fixed operation is performed.  
4) After the test run, push [ON/OFF] button to stop the  
operation. (Display in the display part is same as the  
procedure in Item 1.)  
5) Push [CHK] button to clear the test run mode.  
([TEST] display in the display part disappears and  
the status returns to the normal stop status.)  
13 Filter sign display  
1) The operation time of the indoor fan is calculated,  
the filter reset signal is sent to the remote controller  
when the specified time has passed, and it is  
displayed on LCD.  
[FILTER  
] goes on.  
Specified time  
Duct: 2500H  
2) When the filter reset signal has been received from  
the remote controller, time of the calculation timer  
is cleared.  
In this case, the measurement time is reset if the  
specified time has passed, and display on LCD  
disappears.  
14 Central control mode  
selection  
1) Setting at the centerl controller side enables to  
select the contents which can be operated on the  
remote controller at indoor unit side.  
2) Setup contents  
• 64 line central controller (TCB-SC642TLE2)  
[Individual]: Operated on the remote controller  
(Priority to second pushing)  
Display at remote  
controller side  
(No display)  
[Central 1]: ON/OFF operation cannot be  
operated on the remote controller.  
[Central  
] goes on  
[Central 2]: ON/OFF, mode selection, temp. setup [Central  
operations cannot be operated on  
] goes on  
] goes on  
] goes on  
the remote controller.  
[Central 3]: Mode selection and temp. setup  
operations cannot be operated on the  
remote controller.  
[Central  
[Central 4]: Mode selection cannot be operated  
on the remote controller.  
[Central  
“Fixed with 75%”.)  
∗ In case of the wireless type, the display lamp  
does not change but the contents are same.  
If operating an item which is prohibited by the  
central control mode from the remote controller, it  
is notified with the receive sound, Pi, Pi, Pi, Pi, Pi  
(5 times).  
– 28 –  
No.  
Item  
Outline of specifications  
Remarks  
15 Save operation  
(By connected  
outdoor unit)  
1) When selecting [AUTO] mode, the save operation is enabled.  
2) Shift (Correct) the setup temperature from input values of the  
every sensor in the range of not spoiling comfortable ability.  
3) The input values mean the room temperature Ta, outside  
temperature To, air volume, and indoor heat exchanger sensor  
temperature Tc. Their data for 20 minutes are averaged to  
calculate the correction value of the setup temperature.  
4) The setup temperature is shifted every 20 minutes, and the  
shift value is  
In cooling time: +1.5 to ~1.0K  
In heating time: –1.5 to +1.0K.  
16 Max. frequency 1) When selecting [AUTO] mode, the Max. frequency cut control  
cut control  
operation is enabled.  
2) Cooling operation mode: In case of To <28°C, Max. frequency  
cut is controlled based on the following figure.  
Ta (˚C)  
+4  
Usual control  
+3  
The Max. frequency is restricted  
to approx. cooling rated value.  
Tsc  
3) Heating operation mode: In case of To > 15°C, Max. frequency  
cut is controlled based on the following figure.  
Ta (˚C)  
Tsh  
The Max. frequency is restricted  
to approx. cooling rated value.  
–3  
–4  
Usual control  
– 29 –  
6-3. Indoor Print Circuit Board  
<MCC-1403>  
– 30 –  
6-3-1. Optional Connector Specifications of Indoor P.C. Board  
Connector  
No.  
Pin  
No.  
Function  
Specifications  
Remarks  
Setting at shipment: Interlock of ON by indoor unit operation, with  
OFF by stop operation  
1
2
1
2
DC12V  
Ventilation output  
CN32  
Output  
(Open collector)  
∗ The single operation setting by FAN button on the remote controller  
is performed on the remote controller (DN [31] = 0000 → 0001)  
DC12V  
Defrost output  
(Open collector)  
ON when outdoor unit is defrosted  
Thermostat ON output  
(Open collector)  
3
4
5
6
ON when real thermostat is on. (Compressor ON)  
Option output  
CN60  
Cooling output  
(Open collector)  
ON when operation mode is cooling system  
(COOL, Cooling/Heating automatic cooling)  
Heating output  
(Open collector)  
ON when operation mode is heating system  
(HEAT, Cooling/Heating automatic heating)  
Fan output  
(Open collector)  
ON when indoor fan is on. (When air cleaner is used)  
OFF while clean operation is performed.  
1
2
3
1
2
DC12V  
NC  
Outside error  
input  
Generate the warning code “L30” (continuously for 1 minute) and  
stop the operation forcibly.  
CN80  
CN20  
Outside error input  
DC12V  
Panel operation input  
The grille is controlled according to up/down operation from the  
remote controller.  
Panel up output  
(Open collector)  
AUTO up/  
down grille (∗)  
3
∗ Setting of automatic up/down grille provided is performed on the  
remote controller. (DN [30] = 0000 → 0001)  
Panel down output  
(Open collector)  
4
5
0V  
A
Selection of option error input (Protective operation display of device  
attached to outside) or  
Humidifier setting input (Vaporizing + Drain pump ON)  
Humidifier is set at shipment from factory.  
1
2
FILTER  
Option error /  
Humidifier setting (∗)  
CN70  
∗ Setting of option error input is performed on the remote controller.  
(DN [2A] = 0002 → 0001)  
0V  
0V  
1
2
1
2
1
2
This check is used to check indoor operation.  
(Performs operation of indoor fan “H”, Louver horizontal and Drain  
pump ON without communication with outdoor and remote controller)  
CHK  
Operation check  
CN71  
CN72  
CN73  
0V  
DISP  
Exhibition mode  
Communication is available by indoor unit and remote controller only.  
Indoor unit forced thermostat OFF operation  
Demand input  
EXCT  
Demand  
0V  
∗ This option is not provided to oversea models.  
– 31 –  
7. INDOOR UNITTROUBLESHOOTING  
7-1. Summary ofTroubleshooting  
<Wired remote controller type>  
1. Before troubleshooting  
1) Required tools/instruments  
+
–
•
and  
screwdrivers, spanners, radio cutting pliers, nippers, push pins for reset switch  
• Tester, thermometer, pressure gauge, etc.  
2) Confirmation points before check  
a) The following operations are normal.  
1. Compressor does not operate.  
• Is not 3-minutes delay (3 minutes after compressor OFF)?  
• Is not it during thermo-OFF?  
• Does not timer operate during fan operation?  
• Is not an overflow error detected on the indoor unit?  
• Is not outside high-temperature operation controlled in heating operation?  
2. Indoor fan does not rotate.  
• Does not cool air discharge preventive control work in heating operation?  
3. Outdoor fan does not rotate or air volume changes.  
• Does not high-temperature release operation control work in heating operation?  
• Does not outside low-temperature operation control work in cooling operation?  
• Is not defrost operation performed?  
4. ON/OFF operation cannot be performed from remote controller.  
• Is not the control operation performed from outside/remote side?  
• Is not automatic address being set up?  
(When the power is turned on at the first time or when indoor unit address setting is changed,  
the operation cannot be performed for maximum approx. 5 minutes after power-ON.)  
• Is not being carried out a test run by operation of the outdoor controller?  
b) Did you return the cabling to the initial positions?  
c) Are connecting cables of indoor unit and remote controller correct?  
2. Troubleshooting procedure  
When a trouble occurred, check the parts along with the following procedure.  
→
→
Trouble  
Confirmation of check code display  
Check defective position and parts.  
NOTE :  
For cause of a trouble, power conditions or malfunction/erroneous diagnosis of microcomputer due to outer  
noise is considered except the items to be checked. If there is any noise source, change the cables of the  
remote controller to shield cables.  
– 32 –  
Main remote controller (RBC-AMT32E)  
How to read check monitor display  
<7-segment display>  
Procedure 1  
n Confirmation and check  
SET  
TEST  
When pushing  
and  
buttons at the same time  
When an error occurred in the air conditioner, an  
error code and indoor UNIT No. appear on the  
display part of the remote controller.  
for 4 seconds or more, the following display appears.  
If is displayed, the mode enters in the error log  
mode.  
The error code is only displayed during the  
operation.  
• [01: Order of error log] is displayed in CODE No.  
• [Error code] is displayed in CHECK.  
If the display disappears, operate the air  
conditioner according to the following  
“Confirmation of error log” for confirmation.  
• [Indoor unit address in which an error occurred] is  
displayed in Unit No..  
Error code  
Indoor UNIT No. in  
which an error occurred  
Procedure 2  
n Confirmation of error log  
TEMP.  
Every pushing of  
button used to set  
When an error occurred on the air conditioner,  
the error log can be confirmed with the following  
procedure. (The error history is stored in  
memory up to 4 errors.)  
temperature, the error log stored in memory is  
displayed in order.  
The numbers in CODE No. indicate CODE No.  
[01] (latest) → [04] (oldest).  
The log can be confirmed from both operating  
status and stop status.  
REQUIREMENT  
CL  
Do not push  
the indoor unit will be deleted.  
button because all the error log of  
2
3
1
Procedure 3  
TEST  
After confirmation, push  
usual display.  
button to return to the  
– 33 –  
n Remote controller switch monitoring function  
This function is available to call the service  
monitor mode from the remote controller during a  
test run to acquire temperatures of sensors of the  
remote controller, indoor unit, and outdoor unit.  
Outdoor unit data  
Data name  
CODE No.  
Outdoor unit heat exchanger (coil)  
temperature (TE)  
60  
61  
62  
63  
64  
65  
6A  
Outside air temperature (TO)  
Compressor discharge temperature (TD)  
Compressor suction temperature (TS)  
—
Heatsink temperature (THS)  
Operating current (x1/10)  
2
4
Compressor cumulative operating hours  
(x100h)  
F1  
1
3
CL  
TEST  
1. Push  
and  
buttons simultaneously for at  
least 4 seconds to call the service monitor mode.  
The service monitor indicator lights up and the  
header indoor unit number is displayed first.  
CODE No. 00 is also displayed.  
2. Pushing TEMP.  
buttons, select the  
number of sensor, etc. (CODE No.) to be  
monitored. (See the following table.)  
LOUVER  
3. Pushing UNIT  
(left side of the button), select an  
indoor unit to be monitored.  
The sensor temperatures of indoor units and  
their outdoor unit in the control group are displayed.  
TEST  
4. Push  
button to return to the normal display.  
Indoor unit data  
CODE No.  
Data name  
01  
02  
Room temperature (remote controller)  
Indoor unit intake air temperature (TA)  
Indoor unit heat exchanger (coil)  
temperature (TCJ)  
03  
04  
F3  
Indoor unit heat exchanger (coil)  
temperature (TC)  
Indoor unit fan cumulative  
operating hours (x1 h)  
– 34 –  
7-1-1. Check Code List (Indoor)  
(Indoor unit detected)  
Check code indication  
Air conditioner operation  
Representative defective position  
Explanation of error contents  
TCC-LINK central &  
Remote controller  
Automatic  
reset  
Operation  
continuation  
No communication from remote controller and network adapter  
E03  
Regular communication error between indoor and remote controller  
¡
×
(Also no communication from central control system)  
E04  
E08  
E10  
E18  
F01  
F02  
F10  
F29  
L03  
L07  
L08  
L09  
L20  
L30  
P01  
P10  
P19  
P31  
Indoor/Outdoor serial error  
There is error on serial communication between indoor and outdoor units  
Same address as yours was detected.  
¡
¡
¡
¡
¡
¡
¡
×
×
×
×
×
¡
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
Duplicated indoor addresses  
²
Communication error between indoor MCU  
Regular communication error between indoor master and follower units  
Indoor unit, Heat exchanger (TCJ) error  
Indoor unit, Heat exchanger (TC) error  
Indoor unit, Room temp. sensor (TA) error  
Indoor unit, other indoor P.C. board error  
Duplicated setting of indoor group master unit  
There is group cable in individual indoor unit.  
Unset indoor group address  
MCU communication error between main motor and micro computer  
Regular communication between indoor master and follower units is impossible.  
Open/short was detected on heat exchanger (TCJ).  
Open/short was detected on heat exchanger (TC).  
Open/short was detected on room temp. sensor (TA).  
EEPROM error (Other error may be detected. If no error, automatic address is repeated.  
There are multiple master units in a group.  
²
²
²
When even one group connection indoor unit exists in individual indoor unit.  
Indoor group address is unset.  
Unset indoor capacity  
Capacity of indoor unit is unset.  
Duplicated central control system address  
Outside error input to indoor unit (Interlock)  
Indoor unit, AC fan error  
Duplicated setting of central control system address  
Abnormal stop by outside error (CN80) input  
×
×
×
¡
¡
An error of indoor AC fan was detected. (Fan motor thermal relay worked.)  
Float switch worked.  
Indoor unit, overflow detection  
4-way valve system error  
In heating operation, an error was detected by temp. down of indoor heat exchanger sensor.  
Follower unit in group cannot operate by warning from [E03/L03/L07/L08] of master unit.  
Other indoor unit error  
When this warning was detected before group construction/address check finish at power supply was turned on, the mode shifts automatically to AUTO address setup mode.  
²
(Remote controller detected)  
Check code indication  
Remote controller  
Air conditioner operation  
Representative defective position  
Explanation of error contents  
Automatic  
reset  
Operation  
continuation  
E01  
E02  
No master remote controller, Remote controller communication (Receive) error  
Remote controller communication (Send) error  
Signal cannot be received from indoor unit. Master remote controller was not set. (including 2 remote controllers)  
Signal cannot be sent to indoor unit.  
—
—
—
—
In 2-remote controller control, both were set as master.  
(Indoor master unit stops warning and follower unit continues operation.)  
E09  
Duplicated master remote controller  
×
(Central control devices detected)  
Check code indication  
TCC-LINK central  
Air conditioner operation  
Representative defective position  
Explanation of error contents  
Automatic  
reset  
Operation  
continuation  
C05  
C06  
C12  
P30  
Central control system communication (send) error  
Signal sending operation of central control system is impossible. There are multiple same central devices. (AI-NET)  
Signal receiving operation of central control system is impossible.  
—
—
—
—
—
—
—
—
Central control system communication (receive) error  
General-purpose device control interface batched warning  
Group follower unit is defective.  
An error on device connected to general-purpose device control interface of exclusive to TCC-LINK/AI-NET  
Group follower unit is defective. (For remote controller, above-mentioned [∗∗∗] details are displayed with unit No.)  
NOTE: Even for the same contents of error such as communication error, the display of check code may differ according to detection device.  
When remote controller or central controller detects an error, it is not necessarily related to operation of the air conditioner. In this list, the check codes that outdoor unit detects are not described.  
Check Code List  
Error mode detected by indoor unit  
Operation of diagnostic function  
Judgment and measures  
Check  
code  
Status of  
air conditioner  
Cause of operation  
Condition  
1. Check cables of remote controller and communication adapters.  
• Remote controller LCD display OFF (Disconnection)  
• Central remote controller [97] check code  
No communication from remote  
controller (including wireless) and  
communication adapter  
Stop  
Displayed when  
E03  
(Automatic reset) error is detected  
The serial signal is not output from  
outdoor unit to indoor unit.  
1. Outdoor unit does not completely operate.  
• Inter-unit wire check, correction of miswiring  
• Check outdoor P.C. board. Correct wiring of P.C. board.  
• Miswiring of inter-unit wire  
Stop  
Displayed when  
E04  
• Defective serial sending circuit on  
outdoor P.C. board  
(Automatic reset) error is detected  
2. When outdoor unit normally operates  
Check P.C. board (Indoor receiving / Outdoor sending).  
• Defective serial receiving circuit on  
indoor P.C. board  
E08  
L03  
Duplicated indoor unit address  
Duplicated indoor header unit  
1. Check whether remote controller connection (Group/Individual)  
was changed or not after power supply turned on  
(Finish of group construction/Address check).  
Displayed when  
error is detected  
* If group construction and address are not normal when the  
power has been turned on, the mode automatically shifts to  
address setup mode. (Resetting of address)  
Stop  
There is group wire in individual indoor  
unit.  
L07  
L08  
L09  
Unset indoor group address  
Unset indoor capacity  
Displayed when 1. Set indoor capacity (DN=11)  
error is detected  
Stop  
Stop  
Displayed when 1. Check outside devices.  
L30  
P10  
Abnormal input of outside interlock  
error is detected  
2. Check indoor P.C. board.  
1. Trouble of drain pump  
Float switch operation  
Displayed when 2. Clogging of drain pump  
Stop  
Stop  
• Float circuit, Disconnection,  
Coming-off, Float switch contact error  
error is detected  
3. Check float switch.  
4. Check indoor P.C. board.  
1. Check 4-way valve.  
4-way valve system error  
Displayed when 2. Check 2-way valve and check valve.  
P19  
• After heating operation has started,  
indoor heat exchangers temp. is  
down.  
(Automatic reset) error is detected  
3. Check indoor heat exchanger (TC/TCJ).  
4. Check indoor P.C. board.  
Stop  
1. Judge follower unit while master unit is [E03], [L03], [L07] or [L08].  
2. Check indoor P.C. board.  
Own unit stops while warning is output  
to other indoor units.  
Displayed when  
(Follower unit)  
error is detected  
(Automatic reset)  
P31  
F01  
F02  
Coming-off, disconnection or short of  
indoor heat exchanger temp. sensor  
(TCJ)  
1. Check indoor heat exchanger temp. sensor (TCJ).  
2. Check indoor P.C. board.  
Stop  
Displayed when  
(Automatic reset) error is detected  
Coming-off, disconnection or short of  
indoor heat exchanger temp. sensor  
(TC)  
1. Check indoor heat exchanger temp. sensor (TC).  
2. Check indoor P.C. board.  
Stop  
Displayed when  
(Automatic reset) error is detected  
Coming-off, disconnection or short of  
indoor heat exchanger temp. sensor  
(TA)  
1. Check indoor heat exchanger temp. sensor (TA).  
2. Check indoor P.C. board.  
Stop  
Displayed when  
F10  
F29  
(Automatic reset) error is detected  
Indoor EEPROM error  
Stop  
Displayed when 1. Check indoor EEPROM. (including socket insertion)  
(Automatic reset) error is detected  
• EEPROM access error  
2. Check indoor P.C. board.  
Communication error between indoor  
MCU  
1. Check indoor P.C. board.  
Stop  
Displayed when  
E10  
E18  
(Automatic reset) error is detected  
• Communication error between fan  
driving MCU and main MCU  
1. Check remote controller wiring.  
2. Check indoor power supply wiring.  
3. Check indoor P.C. board.  
Regular communication error between  
indoor header and follower units  
Stop  
Displayed when  
(Automatic reset) error is detected  
– 36 –  
Error mode detected by outdoor unit  
The check code has been ramified from 4 series and after  
The ramified check code is displayed only when both the indoor unit and the outdoor unit are 4 series and after.  
(Ex. Combination of RAV-SM1404UT-E with RAV-SM2804AT8-E)  
When the indoor unit is 3 series and before, the conventional check code is displayed.  
(Ex. Combination of RAV-SM1402BT-E and RAV-SM2804AT8-E: Outdoor unit only is 4 series.)  
Operation of diagnostic function  
Check code  
Indoor unit  
before after  
Status of  
air conditioner  
Judgment and measures  
Cause of operation  
Condition  
3 series 4 series  
1. Check discharge temp. sensor (TD).  
2. Check outdoor P.C. board (MCC-1599).  
Disconnection, short of discharge  
temp. sensor (TD)  
Displayed when  
error is detected  
F04  
F06  
F08  
F04  
F06  
F07  
F12  
F15  
F08  
Stop  
Stop  
1. Check temp. sensor (TE).  
Disconnection, short of outdoor temp.  
sensor (TE)  
Displayed when  
error is detected  
2. Check outdoor P.C. board (MCC-1599).  
1. Check temp. sensor (TL).  
Disconnection, short of outdoor temp.  
sensor (TL)  
Displayed when  
error is detected  
Stop  
2. Check outdoor P.C. board (MCC-1599).  
1. Check suction temp. sensor (TS).  
Disconnection, short of suction temp.  
sensor (TS)  
Displayed when  
error is detected  
Stop  
2. Check outdoor P.C. board (MCC-1599).  
1. Check temp. sensor (TE, TS).  
Miss-mounting of outdoor temp.  
sensor (TE, TS)  
Displayed when  
error is detected  
Stop  
2. Check outdoor P.C. board (MCC-1599).  
1. Check outside temp. sensor (TO).  
Disconnection, short of outside temp.  
sensor (TO)  
Displayed when  
error is detected  
Continue  
2. Check outdoor P.C. board (MCC-1599).  
Disconnection, short of heat sink  
temp. sensor (TH)  
Displayed when 1. Check outdoor P.C. board (MCC-1599).  
error is detected (Q201 is incorporated in TH sensor.)  
F13  
F31  
L10  
Stop  
Stop  
Stop  
Displayed when 1. Check outdoor P.C. board (MCC-1599).  
error is detected  
Outdoor P.C. EEPROM error  
Displayed when 1. Outdoor service P.C. board  
Unset jumper of service P.C. board  
error is detected  
Check model type setting jumper wire.  
1. Check outdoor P.C. board  
Communication error between  
outdoor P.C. board MCU  
(MCC-1596, MCC-1597, MCC-1599).  
Displayed when  
Stop  
Stop  
error is detected 2. Connection check between CN802 of MCC-1599 and  
CN504 of MCC-1597, and also connection check  
L29  
P07  
between CN505 of MCC-1597 and CN851 of MCC-1596.  
Heat sink overheat error  
1. Check screw tightening between PC. Board and heat  
sink and check radiator grease (MCC-1596).  
Displayed when  
error is detected  
∗ Heat sink temp. sensor detected  
over specified temperature.  
L29  
2. Check heat sink blast path.  
1. Check gas leak, recharge  
Detection of gas leak  
2. Check full open of service valve.  
Displayed when  
error is detected  
∗ Discharge temp. sensor (TD),  
Suction temp. sensor (TS) detected  
temperature over specified temp.  
3. Check PMV (Pulse Motor Valve).  
4. Check broken pipe.  
P15  
P19  
Stop  
Stop  
5. Check discharge temp. sensor (TD), suction temp.  
sensor (TS).  
4-way valve inverse error  
1. Check operation of 4-way valve.  
∗ After heating operation has started,  
indoor heat exchanger temp. lowers  
under the specified temp.  
2. Check outdoor heat exchanger (TE), suction temp.  
sensor (TS).  
Displayed when  
error is detected 3. Check indoor heat exchanger sensor (TC).  
4. Check 4-way valve coil.  
∗ After heating operation has started,  
outdoor heat exchanger / suction  
temp. rises over the specified temp.  
5. Check PMV (Pulse Motor Valve).  
Compressor break down  
1. Check power supply voltage. (AC342 to 457V)  
Displayed when  
∗ Although operation has started,  
operation frequency decreases and  
operation stops.  
2. Overload operation of refrigerating cycle  
H01  
H02  
H01  
H02  
Stop  
Stop  
error is detected  
Compressor lock  
1. Trouble of compressor (Lock, etc.): Replace compressor.  
Displayed when  
* Over-current detection after  
compressor start-up  
2. Wiring error of compressor (Open phase)  
error is detected  
– 37 –  
Operation of diagnostic function  
Check code  
Indoor unit  
Status of  
air conditioner  
Judgment and measures  
Cause of operation  
Condition  
before  
after  
3 series 4 series  
Displayed when 1. Check outdoor P.C. board (MCC-1596).  
H03  
Current detection circuit error  
Stop  
Stop  
error is detected  
(AC current detection circuit)  
H03  
P05  
1. Check open phase of 3-phase power supply.  
Open phase of 3-phase power  
supply  
Displayed when  
error is detected  
2. Black lead wire to be connected to CN03 of MCC-1596  
does not pass through T611.  
1. Check connection of Ps sensor connector.  
2. Check failure of Ps sensor.  
Displayed when  
error is detected  
F23  
Ps sensor error  
Stop  
3. Check compressing power error of compressor.  
4. Check 4-way valve error.  
5. Check outdoor P.C. board error.  
1. Check service valves are fully opened.  
(Gas side, Liquid side)  
H06  
2. Check clogging of outdoor PMV. (PMV1, 2)  
3. Check SV2 circuit.  
Displayed when  
H06  
Low pressure protective operation  
Stop  
error is detected 4. Check Ps sensor error.  
5. Check clogging of indoor filter.  
6. Check clogging of refrigerant pipe.  
7. Check of outdoor fan operation. (In heating mode)  
8. Check short of refrigerant.  
Discharge temp. error  
1. Check refrigerating cycle (Gas leak)  
2. Trouble of electronic expansion valve  
3. Check discharge temp. sensor (TD).  
Displayed when  
error is detected  
P03  
P03  
H04  
Stop  
Stop  
∗ Discharge temp. (TD) over  
specified value was detected.  
1. Check case thermostat and connector.  
2. Check gas leak, recharge  
Case thermostat operation  
Displayed when  
error is detected  
3. Check full open of service valve.  
4. Check PMV (Pulse Motor Valve).  
5. Check broken pipe.  
∗ Abnormal overheat of compressor  
1. Check service valves are fully opened.  
(Gas side, Liquid side)  
2. Check of outdoor fan operation.  
3. Check motor error of outdoor fan.  
4. Check clogging of outdoor PMV. (PMV1, 2)  
5. Check clogging of heat exchanger in indoor/outdoor units.  
6. Short-circuit status of suction/discharge air in outdoor unit.  
7. Check outdoor P.C. board error.  
Displayed when  
error is detected  
P04  
High pressure SW system error  
Stop  
P04  
8. Check fan system error (Cause of air volume drop) at  
indoor side.  
9. Check PMV opening status in indoor unit.  
Displayed when 1. Check power supply voltage. AC342 to 457V  
error is detected  
P05  
P20  
Power supply voltage error  
Stop  
Stop  
1. Check outdoor heat exchanger sensor (TL).  
2. Check indoor heat exchanger sensor (TC, TCJ).  
3. Check full open of service valve.  
High pressure protective operation  
• During cooling operation, outdoor  
temp. sensor (TL) detected  
temperature over specified temp.  
Displayed when 4. Check indoor/outdoor fan.  
error is detected  
5. Check PMV (Pulse Motor Valve).  
• During heating operation, indoor  
temp. sensor (TC, TCJ) detected  
temperature over specified temp.  
6. Check clogging and short circuit of indoor/outdoor heat  
exchanger.  
7. Overcharge of refrigerant. Recharge  
1. Check lock of fan motor.  
2. Check power supply voltage between L2 and N.  
AC198 to 264V  
Displayed when  
error is detected  
P22  
P22  
Outdoor fan system error  
Stop  
3. Check outdoor P.C. board.  
1. When performing operation while taking-off compressor  
wire, P26 error occurs. Check control P.C. board  
(MCC-1596).  
Displayed when  
error is detected  
Short-circuit error of compressor  
driving element  
Stop  
Stop  
P26  
P29  
P26  
P29  
2. When performing operation while taking-off compressor  
wire, an error does not occur. (Compressor rare short)  
Displayed when 1. Check control P.C. board (MCC-1596).  
error is detected  
Position detection circuit error  
– 38 –  
Error mode detected by remote controller or central controller (TCC-LINK)  
Operation of diagnostic function  
Judgment and measures  
Status of  
air conditioner  
Check code  
Cause of operation  
Condition  
Power supply error of remote controller, Indoor  
EEPROM error  
1. Check remote controller inter-unit wiring.  
2. Check remote controller.  
No communication with master indoor unit  
• Remote controller wiring is not correct.  
• Power of indoor unit is not turned on.  
• Automatic address cannot be completed.  
Not displayed at all  
(Operation on  
remote controller  
is impossible.)  
3. Check indoor power wiring.  
4. Check indoor P.C. board.  
Stop  
—
5. Check indoor EEPROM.  
(including socket insertion)  
→ Automatic address repeating phenom-  
enon generates.  
Receiving error from remote controller  
1. Check remote controller inter-unit wiring.  
2. Check remote controller.  
No communication with master indoor unit  
Stop  
(Automatic reset)  
E01  
Displayed when  
error is detected  
• Disconnection of inter-unit wire between  
remote controller and master indoor unit  
(Detected by remote controller side)  
∗ If center exists,  
operation continues.  
∗2  
3. Check indoor power wiring.  
4. Check indoor P.C. board.  
Stop  
Sending error of remote controller  
(Automatic reset)  
Signal send error to indoor unit  
(Detected by remote controller side)  
Displayed when 1. Check sending circuit inside of remote  
E02  
∗ If center exists,  
operation continues.  
error is detected  
controller.  
→ Replace remote controller.  
1. In 2-remote controllers (including wireless),  
there are multiple main units.  
Stop  
There are multiple main remote controllers.  
(Detected by remote controller side)  
Displayed when  
error is detected  
E09  
L20  
(Sub unit  
Check that there are 1 main remote  
controller and other sub remote controllers.  
continues operation.)  
Duplicated indoor central addresses on  
communication of central control system  
(Detected by indoor/central controller side)  
1. Check setting of central control system  
network address. (Network adapter SW01)  
Stop  
(Automatic reset)  
Displayed when  
error is detected  
Central controller  
L20  
2. Check network adapter P.C. board.  
—
1. Check communication wire / miswiring  
2. Check communication (U3, U4 terminals)  
3. Check network adapter P.C. board.  
∗3  
Communication circuit error of central  
control system  
(Detected by central controller side)  
Continues  
Displayed when  
Central controller  
(Send)  
4. Check central controller (such as central  
control remote controller, etc.)  
(By remote controller) error is detected  
C05  
(Receive)  
C06  
5. Check terminal resistance. (TCC-LINK)  
—
Continuation/Stop  
Indoor Gr sub unit error  
(Detected by central controller side)  
Displayed when Check the check code of the corresponding  
unit from remote controller.  
(According  
error is detected  
Central controller  
P30  
to each case)  
∗2 The check code cannot be displayed by the wired remote controller.  
(Usual operation of air conditioner becomes unavailable.)  
For the wireless models, an error is notified with indication lamp.  
∗3 This trouble is related to communication of remote controller (A, B), central system (TCC-LINK U3, U4),  
and [E01], [E02], [E03], [E09] or [E18] is displayed or no check display on the remote controller according  
to the contents.  
– 39 –  
7-1-2. Diagnostic Procedure for Each Check Code (Indoor Unit)  
Check code  
[E01 error]  
NO  
Correct inter-unit cable  
of remote controller  
Is inter-unit cable of A and B normal?  
YES  
Is there no disconnection or  
contact error of connector on harness  
from terminal block of indoor unit?  
YES  
Correct connection of connector.  
Check circuit wiring.  
NO  
NO  
Is group control operation?  
YES  
NO  
Check power connection of indoor unit.  
(Turn on power again.)  
Is power of all indoor units turned on?  
YES  
NO  
Check indoor P.C. board (MCC-1403).  
Is power supplied to remote controller?  
AB terminal: Approx. DC18V  
Defect → Replace  
YES  
YES  
Are 2 remote controllers set  
without master unit?  
Correct a master unit/a follower unit.  
(Remote controller address connector)  
NO  
Check remote controller P.C. board.  
Defect → Replace  
[E09 error]  
YES  
Are 2 master units set in  
2 remote controllers?  
Correct as a master unit  
and a follower unit.  
NO  
Check remote controller P.C. board.  
Defect → Replace  
– 40 –  
[E04 error]  
NO  
NO  
NO  
NO  
Is group address setup of  
remote controller correct?  
Does outdoor operate?  
Check CODE No. [14].  
YES  
YES  
Are wiring in indoor unit and  
1, 2, 3 inter-unit cables correct?  
Correct wiring and  
inter-unit cables.  
YES  
Correct wiring of connector  
and terminal blocks.  
Are wirings of terminal blocks  
(1, 2, 3) wired to CN67 normal?  
YES  
Check outdoor P.C. board.  
Check indoor P.C. board.  
Defect → Replace  
Defect → Replace  
[E10 error]  
YES  
Check power supply voltage.  
Correct lines.  
Check and eliminate noise, etc.  
Is there no disorder of power supply?  
NO  
Check indoor control P.C. board  
(MCC-1403).  
Defect → Replace  
– 41 –  
[E18 error]  
NO  
Correct inter-unit cable  
of remote controller.  
Is inter-unit cable  
of A and B normal?  
YES  
Is there no disconnection  
or contact error of connector  
on harness from terminal block  
of indoor unit?  
YES  
Correct connection of connector.  
Check circuit wiring.  
NO  
NO  
Is group control operation?  
YES  
Check power  
connection status of indoor unit  
(Connect again).  
NO  
Is power of all indoor units turned on?  
YES  
Is there no contact error  
of indoor/outdoor inter-unit cable  
(Signal line)?  
YES  
Correct indoor/outdoor inter-unit cable  
(Serial signal line).  
NO  
Check indoor P.C. board  
(MCC-1403).  
Defect → Replace  
[E08, L03, L07, L08 error]  
E08: Duplicated indoor unit No.  
L03: There are 2 or more master units in a group control.  
L07: There is 1 or more group address [Individual] in a group control.  
L08: The indoor group address is unset. (99)  
If the above error is detected when power supply turned on, the mode enters automatically in the automatic  
address set mode. (Check code is not output.)  
However, if the above error is detected during the automatic address set mode, a check code may be  
output.  
[L09 error]  
YES  
Set capacity data of indoor unit.  
(Setup CODE No. (DN)=11)  
Is not yet capacity setting  
of indoor unit set up?  
NO  
Check indoor P.C. board (MCC-1403).  
Defect → Replace  
– 42 –  
[L20 error]  
Are wiring connections  
to communication lines  
U3 and U4 normal?  
NO  
Correct wiring connection.  
YES  
YES  
Is not the multiple same central  
control system addresses connected?  
Correct central control system address.  
NO  
Check central controller  
(including network adapter) and  
indoor P.C. board (MCC-1403).  
Defect → Replace  
[L30 error]  
NO  
NO  
Are outside devices of  
Check indoor P.C. board (MCC-1403).  
connector CN80 connected?  
Defect → Replace  
YES  
Check outside devices.  
Defect → Replace  
Do outside devices normally work?  
YES  
Check cause of operation.  
[P30 error] (Central controller)  
NO  
NO  
Is group operation carried out?  
YES  
Is there check code  
on sub remote controller in main  
and sub remote controllers?  
YES  
Check indoor P.C. board (MCC-1403).  
Check corresponding  
indoor unit/outdoor unit.  
Defect → Replace  
– 43 –  
[P10 error]  
Is connection of  
NO  
float switch connector  
(Indoor control board CN34)  
normal?  
Correct connection  
of connector.  
YES  
NO  
YES  
Does float switch work?  
YES  
Is circuit wiring normal?  
NO  
Check and correct wiring  
and wire circuit.  
NO  
Does drain pump work?  
YES  
Are connector pins 1 and 3  
at drain pump unit side shorted  
(Resistance value 0)?  
NO  
NO  
Is power of  
drain pump turned on? ∗  
YES  
YES  
Replace drain pump  
and indoor P.C. board  
(MCC-1403).  
Check the drain pipe, etc.  
Check indoor P.C. board  
(MCC-1403).  
Replace drain pump.  
Check wiring.  
Defect → Replace  
∗ Check that voltage of 1 – 3 pin of CN068 on the indoor P.C. board is 220–240V.  
[P01 error]  
YES  
Is there no connection error or  
disconnection of CN083 connector?  
Connect connector.  
Correct the wiring circuit.  
NO  
NO  
Is condenser normal?  
Replace condenser.  
Replace fan motor.  
YES  
YES  
Is there no mechanical lock of the fan motor?  
NO  
Check indoor P.C. board (MCC-1403).  
Defective → Replace  
– 44 –  
[P19 error]  
NO  
Is operation of 4-way valve normal?  
YES  
NO  
In heating mode,  
4-way valve coil terminal 200V  
YES  
NO  
Is circuit wiring normal?  
YES  
Check 4-way valve.  
Defective → Replace  
Check and correct circuit.  
NO  
Is refrigerant flow by PMV normal?  
YES  
Check and replace PMV.  
NO  
NO  
Check CDB P.C. board.  
YES  
Are resistance value characteristics  
of TC sensor normal?  
YES  
Check CDB P.C. board.  
Defective → Replace  
Replace TC sensor.  
∗ Refer to temperature-Resistance value  
characteristic table.  
Check indoor P.C. board (MCC-1403).  
Defective → Replace  
• In cooling operation, the outdoor unit [P19 error] may be displayed when high pressure is abnormally up.  
In this case, referring to item [P04 error], eliminate the pressure-up cause and then diagnose the error again.  
– 45 –  
[F02 error]  
NO  
NO  
Is connection of TC sensor connector  
Correct connection of connector.  
Replace TC sensor.  
(CN101 on Indoor P.C. board) correct?  
YES  
Are characteristics of  
TC sensor resistance value normal?  
YES  
∗ Refer to Charqacteristics-2.  
Check indoor P.C. board (MCC-1403).  
Defect → Replace  
[F01 error]  
NO  
NO  
Is connection of TCJ sensor connector  
(CN102 on Indoor P.C. board) correct?  
Correct connection of connector.  
Replace TCJ sensor.  
YES  
Are characteristics of  
TCJ sensor resistance value normal?  
YES  
∗ Refer to Charqacteristics-2.  
Check indoor P.C. board (MCC-1403).  
Defect → Replace  
– 46 –  
[C06 error] (1:1 model connection interface)  
NO  
NO  
Are U3 and U4 communication lines normal?  
YES  
Correct communication line.  
∗1  
Correct connection of connector.  
Is connection of connector normal?  
YES  
∗1  
In case of 1:1 model connection interface  
1:1 model connection interface (MCC-1440) CN51 and indoor P.C. board CN050.  
NO  
Check connection of A and B terminal blocks.  
Correct communication line of remote controller.  
Are A and B communication lines normal?  
YES  
YES  
NO  
Is there no connection error of power supply cable?  
NO  
Correct power wiring.  
Is not the source power supply turned on?  
YES  
Turn on the source power supply.  
YES  
Did a power failure occur?  
NO  
YES  
YES  
Is the network address changed  
from the wired remote controller?  
Clear the check code.  
Eliminate noise, etc.  
NO  
Is there no noise source?  
NO  
Uncontrolled  
(Same to others)  
Can the other indoor units  
be normally controlled from the central controller?  
Or is the operation status of indoor unit reflected?  
Check central controller.  
Defect → Replace  
YES  
Uncontrolled  
Can the indoor unit be normally controlled  
from the wired remote controller?  
Check indoor P.C. board (MCC-1403).  
Defect → Replace  
YES  
Check the power supply transformer of  
1:1 model connection interface (MCC-1440).  
Defective → Replace  
– 47 –  
[E03 error] (Master indoor unit)  
[E03 error] is detected when the indoor unit cannot receive a signal from the wired remote controller  
(also central controller).  
Check A and B remote controllers and communication lines of the central control system U3 and U4.  
As communication is impossible, this check code [E03] is not displayed on the wired remote controller and the  
central controller.  
[E01] is displayed on the wired remote controller and [C06 error] is displayed on the central controller.  
If these check codes generate during operation, the air conditioner stops.  
[F29 error]  
This check code indicates a detection error of IC10 non-volatile memory (EEPROM) on the indoor unit P.C.  
board, which generated during operation of the air conditioner. Replace the service P.C. board.  
∗ When EEPROM was not inserted when power supply turned on or when the EEPROM data read/write  
operation is impossible at all, the automatic address mode is repeated. In this time, [97 error] is displayed on  
the central controller.  
(Approx.  
3 minutes)  
(Approx.  
1 minute)  
LED (D002) on indoor unit  
P.C. board flashes with  
1Hz for approx. 10 seconds.  
[SET] is displayed on  
wired remote controller.  
[SETTING]  
goes off.  
Reboot  
(Reset)  
(Power ON)  
(Repetition)  
[P31 error] (Follower indoor unit)  
When the master unit of a group operation detected [E03], [L03], [L07] or [L08] error, the follower unit of the  
group operation detects [P31 error] and then the unit stops.  
There is no display of the check code or alarm history of the wired remote controller. (In this model, the mode  
enters in automatic address set mode when the master unit detected [L03], [L07] or [L08] error.)  
– 48 –  
Temperature – Resistance value characteristic table  
Temperature sensorTA,TC,TCJ  
Representative value  
Resistance value (k  
(Standard value)  
33.80  
                                                                                                                                           
Ω
                                                                                                                                           
)
Temperature  
(°C)  
(Minimum value)  
32.33  
(Maximum value)  
35.30  
0
10  
20  
25  
30  
40  
50  
60  
70  
80  
90  
100  
19.63  
20.35  
21.09  
12.23  
12.59  
12.95  
9.75  
10.00  
10.25  
7.764  
7.990  
8.218  
5.013  
5.192  
5.375  
3.312  
3.451  
3.594  
2.236  
2.343  
2.454  
1.540  
1.623  
1.709  
1.082  
1.146  
1.213  
0.7740  
0.5634  
0.8237  
0.8761  
0.6434  
0.6023  
TA,TC,TCJ sensors  
40  
30  
20  
10  
0
0
10  
20  
30  
40  
50  
60  
70  
80  
90  
100  
Temperature (˚C)  
– 49 –  
Inspection of Fan Motor  
Part name  
Checking procedure  
Measure the resistance value of each winding by using the tester.  
Fan motor  
STF200–370–4AR  
Fan motor inside wiring diagram  
Position  
Black – Red  
Resistance value  
12.1 Ω  
YEL  
BLU  
Black – White  
Black – Yellow  
Orange – White  
Blue – White  
12.4 Ω  
ORN  
3.94 Ω  
BLK  
WHI  
GRY  
RED  
13.47 Ω  
49F  
15.02 Ω  
Motor over heating protection switch  
Under 20°C  
– 50 –  
8. REPLACEMENT OF SERVICE P.C. BOARD  
8-1. Indoort Unit  
<Note: when replacing the P.C. board for indoor unit servicing>  
The nonvolatile memory (hereafter called EEPROM, IC503) on the indoor unit P.C. board before replacement  
includes the model specific type information and capacity codes as the factory-set value and the important setting  
data which have been automatically or manually set when the indoor unit is installed, such as system/indoor/group  
addresses, high ceiling select setting, etc.  
When replacing the P.C. board for indoor unit servicing, follow the procedures below.  
After replacement completes, confirm whether the settings are correct by checking the indoor unit No., Group  
master unit / sub unit settings and perform the cooling cycle confirmation through the trial operation.  
<Replacement procedures>  
CASE 1  
Before replacement, the indoor unit can be turned on and the setting data can be read out by wired  
remote control operation.  
EEPROM data read out [1]  
ò
Replacement of P.C. board for Indoor unit servicing and power on [2]  
ò
Writing the read out EEPROM data [3]  
ò
Power reset  
(for all indoor units connected to the remote control when the group operation control is performed.)  
CASE 2  
Before replacement, the indoor unit cannot be turned on or the wired remote controller operation is  
impossible due to trouble of the power supply circuit to the remote controller. (Defective P.C. board)  
Replacement of EEPROM  
Remove EEPROM installed on the P.C. board before replacement  
and then replace it with EEPROM of the service P.C. board.  
ò
Replacement & power ON for service P.C. board [2]  
ò
Read-out of EEPROM data [1]  
If reading-out is impossible, proceed to CASE 3.  
ò
Replacement of EEPROM  
Replace EEPROM again. (Set the original EEPROM to the service P.C. board.)  
ò
Replacement & power ON for service P.C. board [2]  
ò
Writing-in of the read-out EEPROM data [3]  
Power reset  
(for all indoor units connected to the remote controller when the group operation control is performed.)  
CASE 3  
The EEPROM before replacement is defective and the setting data cannot be read out.  
Replacement & power ON for service P.C. board [2]  
ò
Writing the setting data to EEPROM, such as high ceiling installation setting  
and optional connection setting, etc., based on the customer information. [3]  
ò
Power reset  
(for all indoor units connected to the remote control when the group operation control is performed.)  
– 51 –  
[1] Setting data read out from EEPROM  
The setting data modified on the site, other than factory-set value, stored in the EEPROM shall be read out.  
SET  
CL  
TEST  
Step 1 Push  
,
and  
button on the remote controller simultaneously for more than 4 seconds.  
∗ When the group operation control is performed, the unit No. displayed for the first time is the header unit No.  
At this time, the CODE No. (DN) shows “10 ”. Also, the fan of the indoor unit selected starts its operation  
and the swing operation also starts if it has the louvers.  
UNIT LOUVER  
Step 2 Every time when the  
order. Specify the indoor unit No. to be replaced.  
1. Change the CODE No. (DN) to 10 → 01 by pushing  
button is pushed, the indoor unit No. under the group control is displayed in  
/
buttons for the temperature  
setting. (this is the setting for the filter sign lighting time.)  
At this time, be sure to write down the setting data displayed.  
2. Change the CODE No. (DN) by pushing  
/
buttons for the temperature setting.  
Similarly, be sure to write down the setting data displayed.  
3. Repeat the step 2-2 to set the other settings in the same way and write down the setting data as shown  
in the table 1 (example).  
∗ The CODE No. (DN) are ranged from “01 ” to “FF ”. The CODE No. (DN) may skip.  
TEST  
Step 3 After writing down all setting data, push  
button to return to the normal stop status.  
(It takes approx. 1 min until the remote controller operation is available again.)  
CODE No. required at least  
1. The CODE No. for the Indoor unit type and Indoor unit capacity  
DN  
10  
11  
12  
13  
14  
Contents  
Type  
are required to set the rotation number setting of the fan.  
2. If the system/indoor/group addresses are different from those  
before replacement, the auto-address setting mode starts and the  
manual resetting may be required again.  
Indoor unit capacity  
System address  
Indoor unit address  
Group address  
(when the multiple units group operation including twin system.)  
[2] P.C. Board for indoor unit servicing replacement procedures  
Step 1 Replace the P.C. board to the P.C. board for indoor unit servicing.  
On the new P.C. board, set the same setting of the jumper wire and setting of shortcut connection connec-  
tor as those of the P.C. board before replacement.  
Step 2 According to the system configuration, turn on the indoor unit following to the either methods shown below.  
a) Single operation (Indoor unit is used as standalone.)  
Turn on the indoor unit.  
1. After completion of the auto-address setting mode (required time: approx. 5 min.), proceed to [3].  
(System address = 1, Indoor unit address = 1, Group address = 0 (standalone) are automatically set.)  
SET  
CL  
TEST  
2. Push  
,
and  
buttons simultaneously for more than 4 seconds to interrupt the auto-address  
setting mode, and proceed to [3]. (The unit No. “  
” is displayed.)  
b) Group operation (including twin system)  
Turn on the indoor unit(s) with its P.C. board replaced to the P.C. board for indoor unit servicing,  
according to either methods 1 or 2 shown below.  
1. Turn on only the indoor unit with its P.C. board replaced. (Be sure to confirm the remote controller is  
surely connected. If not, the operation [3] cannot be performed.)  
Perform either methods 1 or 2 described in item a) above.  
2. Turn on the multiple indoor units including the indoor unit with its P.C. board replaced.  
• Twin 1 system only  
• All group connections  
After completion of the auto-address setting mode (required time: approx. 5 min.), proceed to [3].  
∗ The header unit of the group may be changed by performing the auto-address setting.  
Also, the system address/Indoor unit address of the indoor unit with its P.C. board replaced may be  
assigned to the addresses (not used) other than those of the indoor units without its P.C. board replaced.  
It is recommended to keep the information in advance, which cooling system the indoor unit belongs to  
or whether the indoor unit works as the header unit or the follower unit in the group control operation.  
– 52 –  
[3] Writing the setting data to EEPROM  
The settings stored in the EEPROM of the P.C. board for indoor unit servicing are the factory-set values.  
SET  
CL  
TEST  
Step 1 Push  
,
and  
buttons on the remote controller simultaneously for more than 4 seconds.  
∗ In the group control operation, the unit No. displayed for the first time is the header unit No.  
At this time, the CODE No. (DN) shows “10 ”. Also, the fan of the indoor unit selected starts its operation  
and the swing operation starts if it has the louvers.  
(The unit No. “  
” is displayed if the auto-address setting mode is interrupted in [2] step 2 a))  
UNIT LOUVER  
Step 2 Every time when  
button is pushed, the indoor unit No. in the group control operation are displayed  
in order.  
(The settings stored in the EEPROM of the P.C. board for indoor unit servicing are the factory-set values.)  
Specify the indoor unit No. with its P.C. board replaced to the P.C. board for indoor unit servicing.  
(You cannot perform this operation if “  
” is displayed.)  
Step 3 Select the CODE No. (DN) can be selected by pushing the  
/
button for the temperature setting.  
• Set the indoor unit type and capacity.  
The factory-set values shall be written to the EEPROM by changing the type and capacity.  
1. Set the CODE No. (DN) to “10 ”. (without change)  
2. Select the type by pushing  
/
buttons for the timer setting.  
(For example, 4-way Air Discharge Cassette Type is set to “0001”. Refer to table 2)  
SET  
3. Push  
button.  
(The operation completes if the setting data is displayed.)  
4. Change the CODE No. (DN) to “11 ” by pushing  
5. Select the capacity by pushing buttons for the timer setting.  
(For example, 80 Type is set to “0012”. Refer to table 3)  
/
buttons for the temperature setting.  
/
SET  
6. Push  
button.  
(The setting completes if the setting data are displayed.)  
TEST  
7. Return to the normal stop status by pushing  
button.  
(Approx. 1 minute is needed to start operation of the remote controller.)  
Step 4 Write the on-site setting data to the EEPROM, such as address setting, etc. Perform the steps 1 and 2  
above again.  
Step 5 Change the CODE No. (DN) to “01 ” by pushing  
/
buttons for the temperature setting.  
(this is the setting for the filter sign lighting time.)  
Step 6 Check the setting data displayed at this time with the setting data put down in [1].  
1. If the setting data is different, modify the setting data by pushing  
the data put down in [1].  
/
buttons for the timer setting to  
The operation completes if the setting data is displayed.  
2. If the data is the same, proceed to next step.  
Step 7 Change the CODE No. (DN) by pushing  
As described above, check the setting data and modify to the data put down in [1].  
Step 8 Repeat the steps 6 and 7.  
Step 9 After the setting completes, push  
/
buttons for the temperature setting.  
TEST  
button to return to the normal  
stop status. (It takes approx. 1 min until the remote control  
operation is available again.)  
<Fig. 1 RBC-AMT32E>  
∗ The CODE No. (DN) are ranged from “01 ” to “FF ”.  
The CODE No. (DN) is not limited to be serial No.  
SET  
Even after modifying the data wrongly and pushing  
button, it  
is possible to return to the data before modification by pushing  
CL  
button if the CODE No. (DN) is not changed.  
3 6 5 1 4 2  
– 53 –  
Table 1  
DN  
01  
02  
03  
Item  
Filter sign lighting time  
Filter pollution leve  
Setting data  
Factory-set value  
Depending on Type  
0000: standard  
Central control address  
0099: Not determined  
0002: +2°C  
(flooring installation type: 0)  
06  
Heating suction temperature shift  
OF  
10  
11  
12  
13  
14  
Cooling only  
0000: Heat pump  
Type  
Depending on model type  
Depending on capacity type  
0099: Not determined  
0099: Not determined  
0099: Not determined  
Indoor unit capacity  
System address  
Indoor unit address  
Group address  
Temperature range of cooling/heating  
automatic SW control point  
1E  
0003: 3 deg (Ts ± 1.5)  
28  
2b  
31  
32  
40  
60  
Power failure automatic recovery  
0000: None  
Thermo output SW (T10  
)
0000: Thermo ON  
0000: Not available  
0000: Body sensor  
0003: Humidifier ON + Pump OFF  
0000: Available  
ƒ
Ventilation fan (standalone)  
Sensor SW (Selection of static pressure)  
Humidifier control (+ drain pump control)  
Timer setting (wired remote controller)  
Table 2. Type: CODE No. 10  
Setting data  
Type  
Type name abb.  
0006  
Concealed Duct High Static Type  
RAV-SM∗∗∗DT-E (TR)  
Table 3. Indoor unit capacity: CODE No. 11  
Setting data  
Type  
Disable  
224  
0000∗  
0021  
0023  
280  
∗ EEPROM initial value on the P.C. board for indoor unit servicing.  
– 54 –  
9. SETUP AT LOCAL SITE AND OTHERS  
9-1. Indoor Unit  
9-1-1. Test Run Setup on Remote Controller  
<Wired remote controller>  
TEST  
1. When pushing  
button on the remote controller for 4 seconds or more, “TEST” is displayed on LC display.  
ON / OFF  
Then push  
button.  
• “TEST” is displayed on LC display during operation of Test Run.  
• During Test Run, temperature cannot be adjusted but air volume can be selected.  
• In heating and cooling operation, a command to fix the Test Run frequency is output.  
• Detection of error is performed as usual.  
However, do not use this function except case of Test Run because it applies load on the unit.  
2. Use either heating or cooling operation mode for [TEST].  
NOTE : The outdoor unit does not operate after power has been turned on or for approx. 3 minutes after  
operation has stopped.  
TEST  
3. After a Test Run has finished, push  
button again and check that [TEST] on LC display has gone off.  
(To prevent a continuous test run operation, 60-minutes timer release function is provided to this remote  
controller.)  
9-1-2. Forced Defrost Setup of Remote Controller (For wired remote controller only)  
(Preparation in advance)  
TEST  
SET  
CL  
1
Push  
+
+
buttons simultaneously for 4 seconds or more on the remote controller.  
(Push buttons while the air conditioner stops.)  
The first displayed unit No. is the master indoor unit address in the group control.  
UNIT  
2
Every pushing  
other.  
button, the indoor unit No. in the group control is displayed one after the  
Select a main indoor unit (outdoor unit is connected) which is to be defrosted.  
In this time, fan and louver of the selected indoor unit operate.  
TEMP.  
3
4
5
6
Using the set temperature  
buttons, specify the CODE No. (DN) 8C.  
TIME  
Using the timer time  
buttons, set time to data 0001. (0000 at shipment)  
SET  
Push  
button. (OK if indication lights)  
TEST  
Pushing  
button returns the status to the normal stop status.  
(Practical operation)  
ON / OFF  
• Push ON/OFF  
Key.  
• Select the HEAT mode.  
• After while, the forced defrost signal is sent to the outdoor unit and then the outdoor unit starts defrost operation.  
(The forced defrost operation is performed for Max. 12 minutes.)  
• After defrost operation finished, the operation returns to the heating operation.  
To execute the defrost operation again, start procedure from above item 1 .  
(If the forced defrost operation was executed once, setting of the above forced defrost operation is cleared.)  
– 55 –  
9-1-3. LED Display on Indoor P.C. Board  
1. D002 (Red)  
• Goes on at the same time when power was turned on (Main microcomputer operates and goes on.)  
• Flashes with 1-second interval (every 500ms): When EEPROM is not provided or writing was an error.  
• Flashes with 10-seconds interval (every 5S): When the mode is DISP  
2. D203 (Red)  
• Goes on when power is supplied to remote controller (Lights on the hardware)  
9-1-4. Function Selection Setup  
<Procedure> Perform setting while the air conditioner stops.  
TEST  
SET  
CL  
1
Push  
+
+
buttons simultaneously for 4 seconds or more.  
The first displayed unit No. is the master indoor unit address in the group control.  
In this time, fan and louver of the selected indoor unit operate.  
ò
UNIT LOUVER  
2
Every pushing  
button (button at left side), the indoor unit No. in the group control is  
displayed one after the other. In this time, fan and louver of the selected indoor unit only operate.  
ò
TEMP.  
3
4
5
Using the set temperature  
buttons, specify the CODE No. (DN).  
ò
TIME  
Using the timer time  
buttons, select the set data.  
ò
SET  
Push  
button. (OK if indication lights)  
• To change the selected indoor unit, proceed to Procedure  
2
.
• To change item to be set up, proceed to Procedure  
3
.
ò
TEST  
6
Pushing  
button returns the status to the normal stop status.  
TEMP  
ON / OFF  
TIMER SET  
FAN  
MODE  
VENT  
3
6
4
5
FILTER  
RESET TEST  
SET  
CL  
SWING/FIX  
UNIT LOUVER  
1
2
<Operation procedure>  
1 2 3 4 5 6 END  
– 56 –  
Function selection item No. (DN) list  
DN  
Item  
Contents  
At shipment from factory  
0000:None  
0001: 150H  
01  
Filter sign lighting time  
0002:2500H  
0004:10000H  
0003: 5000H  
According to type  
0005: Clogging sensor used  
0001:No.1 unit  
to  
to  
0064: No.64 unit  
03  
Central control address  
0099:Undecided  
0099:Undecided  
0000:No shift  
0002:+2°C  
0001: +1°C  
0002:+2°C  
(Floor type 0000: 0°C)  
06  
10  
Heating suction temp. shift  
Type  
0010: +10°C  
(Up to +6 is recommended.)  
0000:(1-way air discharge cassette)  
According to model type  
0001:(4-way air discharge cassette) to 0038  
11  
12  
13  
Indoor unit capacity  
Line address  
0000:Undecided  
0001:No.1 unit  
0001:No.1 unit  
0000:Individual  
0001 to 0034  
According to capacity type  
0099:Undecided  
to  
to  
0030: No.30 unit  
Indoor unit address  
0064: No.64 unit  
0099:Undecided  
0001: Master unit in group  
14  
Group address  
0099:Undecided  
0002:Follower unit in group  
In automatic cooling/heating, temp.  
width of cool → heat, heat →  
0000:0 deg to  
0020: 20 deg  
1E  
28  
(Cool/heat are reversed with ± (Data value) /  
2 against the set temperature)  
0003:3 deg (Ts±1.5)  
0000:None  
cool mode selection control point  
Automatic reset of power failure  
0000:None  
0001: Provided  
0000:Filter input  
Selection of option / error input  
(CN70)  
2A  
0001:Alarm input (Air cleaner, etc.)  
0002:Humidifier input  
0002:Humidifier  
0000:Indoor thermostat ON  
Selection of thermostat output  
2b  
31  
32  
0000:Thermostat ON  
0000:Impossible  
(T10  
)
ƒ
0001:ON receiving output of outdoor compressor  
Fan (Single operation)  
Sensor selection  
0000:Impossible  
0001: Possible  
0000: Body TA sensor  
0000:Body sensor  
0001: Remote controller sensor  
0000:No control  
0001:Humidifier + Vaporizing type (Pump ON)  
Humidifier control  
(+Drain pump control)  
(This function is not provided.)  
0003:Humidifier ON  
Pump OFF  
40  
60  
0002:Humidifier + Supersonic type  
(Pump ON when specified time elapsed)  
0003:Humidifier + Natural drain type (Pump OFF)  
0000:Operable  
Timer setting  
(Wired remote controller)  
0000:Operable  
0001:Operation prohibited  
C2 Current demand X% to outdoor unit  
0050:50%  
to  
0100: 100%  
0075:75%  
Existence of remote controller save  
function  
0000:Invalid (Impossible)  
0001: Valid (Possible)  
D0  
0001:Valid (Possible)  
∗ Restriction ratio setting for save operation (DN code No. [C2]) can be set/changed from the normal DN setup  
(Detail DN setup).  
– 57 –  
9-1-5. Wiring and Setting of Remote Controller Control  
2-remote controller control  
(Setup method)  
(Controlled by 2 remote controllers)  
This control is to operate 1 or multiple indoor units  
are operated by 2 remote controllers.  
One or multiple indoor units are controlled by  
2 remote controllers.  
(Max. 2 remote controllers are connectable.)  
(Max. 2 remote controllers are connectable.)  
• When connected 2 remote controllers  
operate an indoor unit  
<Wired remote controller>  
How to set wired remote controller  
as sub remote controller  
Change DIP switch inside of the rear side of the  
remote controller switch from remote controller  
master to sub. (In case of RBC-AMT32E)  
Remote controller  
switch (Master)  
Remote controller  
switch (Sub)  
Sold  
Sold  
separately  
separately  
A B  
A B  
Remote controller (Inside of the rear side)  
Remote controller cables  
(Procured locally)  
Terminal block for  
remote controller cables  
1 2  
Sub remote  
controller  
A B  
Indoor unit  
1 2 3  
Master remote  
controller  
1
2
DIP switch  
1
2
1 2 3  
Outdoor unit  
[Operation]  
1. The operation contents can be changed by Last-  
push-priority.  
2. Use a timer on either Master remote controller or  
Sub remote controller.  
– 58 –  
9-1-6. Monitor Function of Remote Controller Switch  
n Calling of sensor temperature display  
<Contents>  
Each data of the remote controller, indoor unit and outdoor unit can be understood by calling the service  
monitor mode from the remote controller.  
<Procedure>  
TEST  
CL  
1
Push  
+
buttons simultaneously for 4 seconds to  
call the service monitor mode.  
The service monitor goes on, the master indoor unit No. is  
displayed at first and then the temperature of CODE No. 00  
is displayed.  
TEMP  
ON / OFF  
TIMER SET  
TIME  
FAN  
SAVE  
MODE  
VENT  
ò
TEMP.  
2
Push temperature set  
the CODE No. of data to be monitored.  
buttons and then change  
FILTER  
RESET TEST  
SET  
CL  
SWING/FIX  
UNIT LOUVER  
The item code list is shown below.  
2 4 1  
<Operation procedure>  
3
1 2 3 4  
Returned to usual display  
CODE No.  
Data name  
Unit  
CODE No.  
Data name  
Unit  
01  
Room temperature  
°C  
60  
61  
Outdoor heat exchanger (Coil) temperature (TE)  
Outside temperature (TO)  
°C  
°C  
(Remote controller)  
02  
03  
Indoor suction temperature (TA)  
°C  
°C  
62  
Compressor discharge temperature (TD)  
Compressor suction temperature (TS)  
Heat sink temperature (THS)  
°C  
Indoor heat exchanger (Coil)  
temperature (TCJ)  
63  
°C  
65  
°C  
04  
Indoor heat exchanger (Coil)  
temperature (TC)  
°C  
6A  
Operation current (× 1/10)  
A
∗ 07  
∗ F2  
F3  
Indoor fan revolution frequency  
rpm  
∗ 6D  
∗ 70  
∗ 72  
∗ 73  
F1  
Outdoor heat exchanger (Coil) temperature (TL)  
Compressor operation frequency  
°C  
Indoor fan calculated operation time ×100h  
rps  
rpm  
rpm  
×100h  
Filter sign time  
×1h  
°C  
Outdoor fan revolution frequency (Lower)  
Outdoor fan revolution frequency (Upper)  
Compressor calculated operation time  
∗ F8  
Indoor discharge temperature*1  
Item with ∗ marks are not provided to the Concealed Duct Type.  
ò
UNIT LOUVER  
3
4
Push  
button to select the indoor unit to be monitored.  
Each data of the indoor unit and its outdoor units can be monitored.  
ò
TEST  
Pushing  
button returns the status to the usual display.  
∗1 The indoor discharge temperature of CODE No. [F8] is the estimated value from TC or TCJ sensor.  
Use this value to check discharge temperature at test run.  
(A discharge temperature sensor is not provided to this model.)  
• The data value of each item is not the real time, but value delayed by a few seconds to ten-odd seconds.  
• If the combined outdoor unit is one before 2 or 3 series, the outdoor unit data [6D], [70], [72] and [73]  
are not displayed.  
– 59 –  
n Calling of error history  
<Contents>  
The error contents in the past can be called.  
<Procedure>  
TEMP  
ON / OFF  
SET  
TEST  
1
Push  
+
buttons simultaneously for 4 seconds or  
more to call the service check mode.  
Service Check goes on, the CODE No. 01 is displayed, and  
then the content of the latest alarm is displayed.  
TIMER SET  
TIME  
FAN  
SAVE  
MODE  
VENT  
FILTER  
RESET TEST  
SET  
CL  
SWING/FIX  
UNIT LOUVER  
The number and error contents of the indoor unit in which an  
2 error occurred are displayed.  
In order to monitor another error history, push the set  
temperature  
/
buttons to change the error  
2 3 1  
<Operation procedure>  
history No. (CODE No.)  
CODE No. 01 (Latest) → CODE No. 04 (Old)  
1 2 3  
NOTE : 4 error histories are stored in memory.  
TEST  
3
Pushing  
button returns the display to usual display.  
Returned to usual display  
REQUIREMENT  
CL  
Do not push  
button, otherwise all the error histories of the indoor unit are deleted.  
(Group control operation)  
In a group control, operation of maximum 8 indoor units can be controlled by a remote controller.  
The indoor unit connected with outdoor unit (Individual/Master of twin) controls room temperature according to  
setting on the remote controller.  
<System example>  
OUT  
IN  
OUT  
IN  
OUT  
IN  
OUT  
IN  
OUT  
IN  
Master  
2-1  
1-1  
3-1  
4-1  
7-1  
Max. 8 units  
Remote controller  
1. Display range on remote controller  
The setup range (Operation mode/Air volume select/Setup temp) of the indoor unit which was set to the  
master unit is reflected on the remote controller.  
1) Concealed duct (RAV-SMXXXDT) is not set up on the master unit.  
• If the Concealed duct is the master unit:  
Operation mode: [Cooling/Heating AUTO] [HEAT] [COOL] [FAN] and no [DRY]  
Air volume select: [HIGH]  
• When the operation mode is [DRY], [FAN] stops in duct models.  
2. Address setup  
Turn on power of the indoor unit to be controlled in a group within 3 minutes after setting of automatic address.  
If power of the indoor unit is not turned on within 3 minutes (completion of automatic address setting), the  
system is rebooted and the automatic address setting will be judged again.  
1) Connect 3 In/Out cables surely.  
2) Check line address/indoor address/group address of the unit one by one.  
3) The unit No. (line/indoor gout address) which have been set once keep the present status as a rule if the  
unit No. is not duplicated with one of another unit.  
– 60 –  
n Indoor unit power-ON sequence  
• The unit without power feed waits entirely  
→ Waiting status is released by system start  
• Reboot when power is fed on the way  
Power ON  
<By indoor unit  
which receives power feed from outdoor unit>  
<Automatic  
address judgment>  
Not normal  
NO  
3 minutes elapse  
Gr construction check  
YES  
Normal  
∗ Gr normal  
1) There is no duplicated indoor unit address.  
2) There is no invalid indoor unit address.  
3) Individual unit and header / follower units  
are not intermingled.  
4) Only a unit for individual.  
5) A master indoor unit and 1 or more  
sub indoor units for Gr.  
System start  
Automatic address starts.  
(Approx. 1 minute up to finish)  
<Initial communication>  
Outdoor model distinction (10 seconds) (Indoor unit)  
Gr construction, louver information (Remote controller)  
<Cautions at test run>  
• Power supply/Indoor/Outdoor serial and Gr wiring: OK  
• Powers of all indoor units are turned on within 3 minutes.  
• Reception time for remote controller operation  
(After power supply was turned on)  
1) When address is OK : Approx. 50 seconds  
2) In AUTO address  
: Approx. 4 to 5 minutes  
Remote controller operation is available.  
(Approx. 50 seconds after power-ON)  
<Usual regular  
communication>  
Regular communication between indoor units (Every 30 seconds) (Header / Follower)  
(When the above status changes, immediately communicates.)  
(Repetition)  
• In a group operation, if the indoor unit which was fed power after judgment of automatic address cannot  
receive regular communication from the master unit and regular communication on identical pipe within  
120 seconds after power was turned on, it reboots (system reset).  
→ The operation starts from judgment of automatic address (Gr construction check) again.  
(If the address of the master unit was determined in the previous time, the power fed to the master unit and  
reboot works, the master unit may change though the indoor unit line address is not changed.)  
– 61 –  
9-2. Setup at Local Site / Others  
Model name:TCB-PCNT30TLE2  
9-2-1. 1:1 Model Connection Interface  
1. Function  
This model is an optional P.C. board to connect the indoor unit to 1:1 model connection interface.  
2. Microprocessor block diagram  
Indoor unit  
Central controller  
1:1 model connection interface  
P.C. board  
CN40  
CN050  
Indoor control  
P.C. board  
CN041  
1:1 model  
connection interface  
communication circuit  
CN51  
Terminal  
resistance  
SW01  
MCC-1440  
Terminal block  
(A, B)  
1:1 model  
connection interface  
Communication units  
Communication distance : 2000 m  
: Total 64 units  
Remote controller  
3. 1:1 model connection interface wiring connection  
CAUTION  
1) When controlling customized setup collectively, 1:1 model connection interface (This option) is required.  
2) In case of group operation, the 1:1 model connection interface is necessary to be connected to the main unit.  
3) Connect the central control devices to the central control system wiring.  
4) When controlling DI, SDI series only, turn on only Bit 1 of SW01 of the least line of the system address No. (OFF  
when shipped from the factory)  
∗ In case of DI, SDI series, the address is necessary to be set up again from the wired remote  
controller after automatic addressing.  
Central control device  
Central control device  
Central control devices: Max. 10 units  
U1 U2  
U3 U4  
U1 U2  
U3 U4  
Refrigerant line 1  
Outdoor unit  
Refrigerant line 2  
Refrigerant line 3  
1 2 3  
1 2 3  
1 2 3  
Caution 3  
Header  
unit  
Follower  
unit  
Indoor unit  
U3 U4  
1 2 3  
A B  
U3 U4  
1 2 3  
1 2 3  
A B  
A B  
1:1 model connection interface  
This product  
(
)
Caution 1  
Caution 2  
sold separately  
Remote controller  
wiring  
Remote controller  
Remote controller  
Remote controller  
Group operation (Max. 8 units)  
Indoor units in all refrigerant lines: Max.64 units  
[If mixed with SMMS series (Link wiring), multi indoor units are included.]  
* However group follower units of SDI, DI series are not included in number of the units.  
– 62 –  
4. Wiring specifications  
• Use 2-core with no polar wire.  
• Match the length of wire to wire length of the central  
control system.  
If mixed in the SMMS system, the wire length is lengthened  
with all indoor/outdoor inter-unit wire length at side.  
No. of wires  
Size  
Up to 1000m: twisted wire 1.25mm2  
Up to 2000m: twisted wire 2.0mm2  
2
• To prevent noise trouble, use 2-core shield wire.  
• Connect the shield wire by closed-end connection and apply open process (insulating process) to the last  
terminal. Ground the earth wire to 1 point at indoor unit side. (In case of central controlling of digital inverter  
(DI, SDI) unit setup)  
CAUTION  
1) Closed-end connection of shield wire (Connect all the connecting parts of each indoor unit)  
2) Apply open process to the last terminal (insulating process).  
3) Ground earth wire to 1 point at indoor unit side.  
Central control device  
U1 U2  
Central control  
system wiring  
Caution 2  
Caution 1  
Outdoor unit  
1
2
3
3
1
2
2
3
3
1
2
2
3
3
Header  
unit  
Follower  
unit  
Indoor unit  
U3 U4  
1
2
U3 U4  
1
U3 U4  
1
: 1:1 model connection interface  
(This option)  
A
B
A
B
A
B
Remote controller  
Remote controller  
Remote controller  
(Group operation)  
5. P.C. board switch (SW01) setup  
When performing collective control by DI or SDI only, the setup of terminator is necessary.  
• Using SW01, set up the terminator.  
• Set up the terminator to only the adapter connected to the indoor unit of least line address No.  
Central control device  
Central control device  
Central control devices: Max. 10 units  
U1 U2  
U3 U4  
U1 U2  
U3 U4  
Refrigerant line 1  
Outdoor unit  
Refrigerant line 2  
Refrigerant line 3  
1 2 3  
1 2 3  
1 2 3  
Central control  
system wiring  
Indoor/outdoor inter-unit wire  
(AC230V serial)  
Header  
unit  
Follower  
unit  
U3 U4  
1 2 3  
A B  
U3 U4  
1 2 3  
1 2 3  
Indoor unit  
A B  
A B  
1:1 model  
connection interface  
This product  
Remote controller wiring  
Remote controller  
(
)
sold separately  
Remote controller  
Remote controller  
Group operation (Max. 8 units)  
Line address  
SW01 Bit 1  
SW01 Bit 2  
Remarks  
1
ON  
OFF  
2
OF  
OFF  
(OFF at shipment from factory)  
(OFF at shipment from factory)  
Turn SW01 Bit 1 to ON.  
As status shipped from factory  
(Reference) Setup contents of switch  
SW01  
Terminator  
Remarks  
Bit 1  
OFF  
ON  
OFF  
ON  
Bit 1  
OFF  
OFF  
ON  
None  
100Ω  
75Ω  
Mixed with multi (Link wiring) at shipment from factory  
Central control by digital inverter only  
Spare  
Spare  
ON  
43Ω  
– 63 –  
6. External view of P.C. board assembly  
Terminator (SW01)  
52  
85  
7. Address setup  
In addition to set up the central control address, it is necessary to change the indoor unit number.  
(Line/Indoor/Group address). For details, refer to 1:1 model connection interface Installation Manual.  
9-3. How to Set up Central Control Address Number  
When connecting the indoor unit to the central control remote controller using 1:1 model connection interface, it  
is necessary to set up the central control address number.  
• The central control address number is displayed as the line No. of the central control remote controller.  
<Procedure> Perform setup while the unit stops.  
VENT  
TEST  
1
Push  
When group control is executed, first the unit No.  
control are selected. In this time, fans of all the selected indoor units are turned on. (Fig. 1)  
+
buttons for 4 seconds or more.  
is displayed and all the indoor units in the group  
UNIT LOUVER  
(Keep  
displayed status without pushing  
button.)  
In case of individual remote controller which is not group-controlled, Line address and Indoor unit address  
are displayed.  
TEMP.  
2
3
Using temperature setup  
buttons, specify CODE No. 03.  
TIME  
Using timer time  
buttons, select the setup data.  
The setup data is shown in the table below (Table 1).  
SET  
4
5
Push  
button. (OK if display goes on.)  
• To change the item to be set up, return to Procedure 2.  
(Fig.1)  
TEST  
Push  
button.  
The status returns to usual stop status.  
(Table 1)  
TEMP  
ON / OFF  
Setup data  
Central control address No.  
0001  
0002  
0003  
:
1
2
TIMER SET  
FAN  
MODE  
VENT  
2
1
SAVE  
3
1
3
FILTER  
RESET TEST  
:
SET  
CL  
SWING/FIX  
UNIT LOUVER  
0064  
64  
0099  
Unset (Setup at shipment from factory)  
4
5
– 64 –  
How to confirm the central control address (New function for AMT32E remote controller)  
<Procedure> It can be confirmed even during operation or stopping.  
UNIT LOUVER  
1
2
Push  
button for 4 seconds or more.  
ò
In the frame at left side of the remote controller screen, the lighting set contents are  
displayed.  
During unset time, 0099 (At shipment from factory) is displayed.  
ò
3
After lighting display for 3 seconds, the display automatically disappears.  
If any button is pushed during display, immediately the display disappears and then the pushed button is  
displayed.  
– 65 –  
10. ADDRESS SETUP  
10-1. Address Setup Procedure  
When an outdoor unit and an indoor unit are connected, or when an outdoor unit is connected to each indoor  
unit respectively in the group operation even if multiple refrigerant lines are provided, the automatic address  
setup completes with power-ON of the outdoor unit.  
The operation of the remote controller is not accepted while automatic address works. (Approx. 4 to 5 minutes)  
Setup of line address of outdoor unit,  
indoor unit address, and group address  
Completion of cabling work  
NO  
Do you arbitrarily set the  
indoor unit address?  
YES  
NO  
NO  
(MANUAL)  
Is refrigerant line 1 line?  
YES  
Is group control performed?  
YES  
(To AUTO address mode)  
Do you change setting after  
automatic setting at the first time?  
YES  
Connect one remote controller with  
one indoor unit (1 : 1) tentatively with  
communication cable.  
Turn on power of outdoor unit.  
Turn on power of outdoor unit.  
Turn on power of outdoor unit.  
After completion of address  
setup, change is to arbitral  
address/group manually.  
Setup of automatic  
address finishes within  
4 to 5 minutes.  
(
)
Set to all indoor units one by one.  
(
)
END  
• When the following addresses are not stored in the neutral memory (IC503) on the indoor P.C. board, a test  
run operation cannot be performed. (Unfixed data at shipment from factory)  
CODE No. Data at shipment  
Setup data range  
0001 (No. 1 unit) to 0030 (No. 30 unit)  
Line address  
12  
13  
0099  
0099  
Indoor unit  
address  
0001 (No. 1 unit) to 0064 (No. 64 unit)  
Max. value of indoor units in the identical refrigerant line  
0000 : Individual (Indoor units which are not controlled in a group)  
0001 : Header unit (1 indoor unit in group control)  
0002 : Follower unit (Indoor units other than master unit in group control)  
Group address  
14  
0099  
– 66 –  
10-2. Address Setup & Group Control  
<Terminology>  
Indoor unit No.  
Group address  
: N - n = Outdoor unit line address N (Max. 30) - Indoor unit address n (Max. 64)  
: 0 = Single (Not group control)  
1 = Header unit in group control  
2 = Follower unit in group control  
Header unit (= 1) : The representative of multiple indoor units in group operation sends/receives signals  
to/from the remote controllers and follower indoor units.  
(∗ It has no relation with an indoor unit which communicates serially with the outdoor units.)  
The operation mode and setup temperature range are displayed on the remote controller  
LCD. (Except air direction adjustment of louver)  
Follower unit (= 2) : Indoor units other than header unit in group operation  
Basically, follower units do not send/receive signals to/from the remote controllers.  
(Except errors and response to demand of service data)  
10-2-1. System Configuration  
1. Single  
Outdoor  
1-1  
Individual  
Indoor  
(Header/Master)  
Remote controller  
2. Single group operation  
• Each indoor unit controls the outdoor unit individually.  
2-1  
Header/Sub  
1-1  
Header/Sub  
4-1  
3-1  
Header/Sub  
8-1  
Header/Sub  
Header/Master  
– 67 –  
10-2-2. Automatic Address Example from Unset Address (No miswiring)  
1. Standard (One outdoor unit)  
1) Single  
1-1  
(Header/Master)  
Individual  
Only turning on source power supply (Automatic completion)  
2. Group operation  
(Multiple outdoor units = Multiple indoor units with serial communication only, without twin)  
2-1  
Header/Sub  
1-1  
Header/Sub  
3-1  
8-1  
Header/Sub  
Header/Master  
(Max. : 8 units)  
Only turning on source power supply (Automatic completion)  
– 68 –  
10-3. Address Setup (Manual Setting from Remote Controller)  
In case that addresses of the indoor units will be  
determined prior to piping work after cabling work  
• Set an indoor unit per a remote controller.  
• Turn on power supply.  
(Example of 2-lines cabling)  
(Real line: Cabling, Broken line: Refrigerant pipe)  
Outdoor Outdoor  
1
2
3
1
2
3
1
2
3
1
2
3
Indoor  
A B  
Indoor  
A B  
2
1
2
Line address → 1  
Indoor unit address → 1  
Group address → 1  
SET  
CL  
TEST  
A B  
1
2
Push  
+
+
buttons simultaneously  
for 4 seconds or more.  
Remote controller  
For the above example, perform setting by  
connecting singly the wired remote controller  
without remote controller inter-unit cable.  
(← Line address)  
Using the temperature setup  
set 12 to the CODE No.  
/
buttons,  
Group address  
Individual  
: 0000  
Header unit : 0001  
Follower unit: 0002  
In case of group control  
3
4
5
Using timer time  
/
buttons, set the line address.  
SET  
Push  
button. (OK when display goes on.)  
(← Indoor unit address)  
Using the temperature setup  
/
buttons, set 13 to the CODE No.  
6
7
8
Using timer time  
/
buttons, set 1 to the line address.  
SET  
Push  
button. (OK when display goes on.)  
(← Group address)  
Using the temperature setup  
/
buttons, set 14 to the CODE No.  
9
10  
11  
Using timer time  
/
buttons, set 0000 to Individual, 0001 to Master unit, and 0002 to sub unit.  
SET  
Push  
Push  
button. (OK when display goes on.)  
TEST  
button.  
Setup completes. (The status returns to the usual stop status.)  
TEMP  
ON / OFF  
TIMER SET  
TIME  
FAN  
SAVE  
MODE  
VENT  
2, 5, 8  
3, 6, 9  
END 11  
FILTER  
RESET TEST  
SET  
CL  
SWING/FIX  
UNIT LOUVER  
4, 7, 10  
1
<Operation procedure>  
1 2 3 4 5 6 7 8 9 10 11 END  
– 69 –  
n Confirmation of indoor unit No. position  
1. To know the indoor unit addresses though position of the indoor unit body is recognized  
• In case of individual operation (Wired remote controller : indoor unit = 1 : 1)  
(Follow to the procedure during operation)  
<Procedure>  
ON / OFF  
1
2
Push  
Push  
button if the unit stops.  
UNIT LOUVER  
button.  
Unit No. 1-1 is displayed on LCD.  
TEMP  
ON / OFF  
(It disappears after several seconds.)  
1
TIMER SET  
TIME  
FAN  
SAVE  
MODE  
VENT  
The displayed unit No. indicate line address and  
indoor unit address.  
Operation  
FILTER  
RESET TEST  
SET  
CL  
SWING/FIX  
UNIT LOUVER  
(When other indoor units are connected to the  
identical remote controller (Group control unit), other  
unit numbers are also displayed every pushing  
UNIT LOUVER  
button.  
2
<Operation procedure>  
END  
1 2  
2. To know the position of indoor unit body by address  
• To confirm the unit No. in the group control  
(Follow to the procedure during operation) (in this procedure, the indoor units in group control stop.)  
<Procedure>  
The indoor unit numbers in the group control are  
successively displayed, and fan, louver, and drain pump  
of the corresponding indoor unit are turned on.  
(Follow to the procedure during operation)  
VENT  
TEST  
1
Push  
4 seconds or more.  
• Unit No. is displayed.  
and  
buttons simultaneously for  
TEMP  
ON / OFF  
TIMER SET  
TIME  
FAN  
SAVE  
MODE  
VENT  
1
3
• Fans and louvers of all the indoor units in the  
group control operate.  
FILTER  
RESET TEST  
SET  
CL  
SWING/FIX  
UNIT LOUVER  
UNIT LOUVER  
2
Every pushing  
button, the unit numbers  
in the group control are successively displayed.  
• The unit No. displayed at the first time indicates the  
master unit address.  
2
<Operation procedure>  
• Fan and louver of the selected indoor unit only  
operate.  
END  
1 2 3  
TEST  
3
Push  
button to finish the procedure.  
All the indoor units in the group control stop.  
– 70 –  
Owner’s Manual  
Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Thank you for purchasing this Toshiba air conditioner.  
Please read carefully through these instructions that contain important information which complies with the “Machinery”  
Directive (Directive 2006/42/EC), and ensure that you understand them.  
11. OWNER’S MANUAL  
Some of the details provided in these instructions differ from the Installation Manual supplied with your product, and the  
instructions provided here take precedence.  
Original instruction  
After reading these instructions, be sure to keep them in a safe place together with the Owner’s Manual and Installation  
Manual supplied with your product.  
ADOPTION OF NEW REFRIGERANT  
This Air Conditioner uses R410A an environmentally friendly refrigerant.  
Generic Denomination: Air Conditioner  
Definition of Qualified Installer or Qualified Service Person  
This appliance is not intended for use by person (including children) with reduced physical, sensory or mental  
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning  
use of the appliance by a person responsible for their safety.  
The air conditioner must be installed, maintained, repaired and removed by a qualified installer or qualified service person.  
When any of these jobs is to be done, ask a qualified installer or qualified service person to do them for you.  
A qualified installer or qualified service person is an agent who has the qualifications and knowledge described in the table  
below.  
Agent  
Qualifications and knowledge which the agent must have  
• Qualified installer  
• The qualified installer is a person who installs, maintains, relocates and removes the air conditioners  
made by Toshiba Carrier Corporation. He or she has been trained to install, maintain, relocate and  
remove the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been  
instructed in such operations by an individual or individuals who have been trained and is thus  
thoroughly acquainted with the knowledge related to these operations.  
Contents  
1
2
3
4
5
6
7
8
9
PRECAUTIONS FOR SAFETY .......................................................................................... 4  
PART NAMES.................................................................................................................... 7  
WIRED REMOTE CONTROLLER ..................................................................................... 8  
CORRECT USAGE........................................................................................................... 11  
TIMER OPERATION......................................................................................................... 13  
POWER SAVING MODE .................................................................................................. 14  
ADVANCED SETTINGS ................................................................................................... 15  
ENERGY SAVING RECOMMENDATIONS ...................................................................... 16  
MAINTENANCE ............................................................................................................... 17  
• The qualified installer who is allowed to do the electrical work involved in installation, relocation and  
removal has the qualifications pertaining to this electrical work as stipulated by the local laws and  
regulations, and he or she is a person who has been trained in matters relating to electrical work on the  
air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in  
such matters by an individual or individuals who have been trained and is thus thoroughly acquainted  
with the knowledge related to this work.  
• The qualified installer who is allowed to do the refrigerant handling and piping work involved in  
installation, relocation and removal has the qualifications pertaining to this refrigerant handling and  
piping work as stipulated by the local laws and regulations, and he or she is a person who has been  
trained in matters relating to refrigerant handling and piping work on the air conditioners made by  
Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an  
individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge  
related to this work.  
• The qualified installer who is allowed to work at heights has been trained in matters relating to working  
at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has  
been instructed in such matters by an individual or individuals who have been trained and is thus  
thoroughly acquainted with the knowledge related to this work.  
• Qualified service  
person  
• The qualified service person is a person who installs, repairs, maintains, relocates and removes the air  
conditioners made by Toshiba Carrier Corporation. He or she has been trained to install, repair,  
maintain, relocate and remove the air conditioners made by Toshiba Carrier Corporation or, alternatively,  
he or she has been instructed in such operations by an individual or individuals who have been trained  
and is thus thoroughly acquainted with the knowledge related to these operations.  
10 AIR CONDITIONER OPERATIONS AND PERFORMANCE ........................................... 19  
11 INSTALLATION ................................................................................................................ 20  
12 TROUBLESHOOTING..................................................................................................... 21  
13 SPECIFICATIONS ........................................................................................................... 22  
• The qualified service person who is allowed to do the electrical work involved in installation, repair,  
relocation and removal has the qualifications pertaining to this electrical work as stipulated by the local  
laws and regulations, and he or she is a person who has been trained in matters relating to electrical  
work on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been  
instructed in such matters by an individual or individuals who have been trained and is thus thoroughly  
acquainted with the knowledge related to this work.  
• The qualified service person who is allowed to do the refrigerant handling and piping work involved in  
installation, repair, relocation and removal has the qualifications pertaining to this refrigerant handling  
and piping work as stipulated by the local laws and regulations, and he or she is a person who has been  
trained in matters relating to refrigerant handling and piping work on the air conditioners made by  
Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an  
individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge  
related to this work.  
• The qualified service person who is allowed to work at heights has been trained in matters relating to  
working at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or  
she has been instructed in such matters by an individual or individuals who have been trained and is  
thus thoroughly acquainted with the knowledge related to this work.  
– 1 –  
– 2 –  
Owner’s Manual  
Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Warning Indications on the Air Conditioner Unit  
1
PRECAUTIONS FOR SAFETY  
Warning indication  
Description  
WARNING  
General  
• Carefully read Owner’s Manual before starting the air conditioner.  
There are many important things to keep in mind for daily operation.  
WARNING  
WARNING  
Transportation and storage  
• When transporting the air conditioner, wear shoes with additional protective toe caps.  
• When transporting the air conditioner, do not take hold of the bands around the packing carton.  
You may injure yourself if the bands should break.  
• When stacking the packing cartons for storage or transportation, heed the precautions written on the packing cartons.  
Failure to heed the precautions may cause the stack to collapse.  
ELECTRICAL SHOCK HAZARD  
ELECTRICAL SHOCK HAZARD  
Disconnect all remote electric power supplies  
before servicing.  
Disconnect all remote electric power supplies  
before servicing.  
Installation  
• Only a qualified installer (*1) or qualified service person (*1) is allowed to carry out the electrical work of the air conditioner.  
Under no circumstances must this work be done by an unqualified individual since failure to carry out the work properly may  
result in electric shocks and/or electrical leaks.  
• After the installation work has been completed, have the installer explain about the circuit breaker positions.  
WARNING  
WARNING  
In the event that trouble has occurred in the air conditioner, set the circuit breaker to the OFF position, and contact a service person.  
• If you install the unit in a small room, take appropriate measures to prevent the refrigerant from exceeding the limit concentration  
even if it leaks. Consult the dealer from whom you purchased the air conditioner when you implement the measures.  
Accumulation of highly concentrated refrigerant may cause an oxygen deficiency accident.  
Moving parts.  
Moving parts.  
Do not operate unit with grille removed.  
Stop the unit before the servicing.  
Do not operate unit with grille removed.  
Stop the unit before the servicing.  
• Do not install the air conditioner in a location that may be subject to a risk of expire to a combustible gas.  
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.  
Operation  
• Before opening the intake grille of the indoor unit or service panel of the outdoor unit, set the circuit breaker to the OFF position.  
Failure to set the circuit breaker to the OFF position may result in electric shocks through contact with the interior parts.  
Only a qualified installer (*1) or qualified service person (*1) is allowed to remove the intake grille of the indoor unit or service  
panel of the outdoor unit and do the work required.  
• Inside the air conditioner are high-voltage areas and rotating parts.  
Due to the danger of electric shocks or of your fingers or physical objects becoming trapped in the rotating parts, do not remove  
the intake grille of the indoor unit or service panel of the outdoor unit.  
When work involving the removal of these parts is required, contact a qualified installer or a qualified service person.  
CAUTION  
CAUTION  
• Do not move or repair any unit by yourself. Since there is high voltage inside the unit, you may get electric shock when removing  
the cover and main unit.  
• Use of a stand more than 50 cm high to clean the filter of the indoor unit or to carry out other such jobs constitutes working at  
heights. Due to the danger of falling off the stand and injuring yourself while working at heights, this kind of work should not be  
done by unqualified individuals. When this kind of work must be carried out, do not do it yourself but ask a qualified installer or a  
qualified service person to do it for you.  
High temperature parts.  
High temperature parts.  
You might get burned when removing this panel.  
You might get burned when removing this panel.  
• Do not touch the aluminum fin of the outdoor unit. You may injure yourself if you do so.  
If the fin must be touched, do not touch it yourself but contact a qualified installer or a qualified service person.  
• Do not climb onto or place objects on top of the outdoor unit.  
You may fall or the objects may fall off of the outdoor unit and result in injury.  
• Do not place any combustion appliance in a place where it is directly exposed to the wind of air conditioner, otherwise it may  
cause imperfect combustion.  
CAUTION  
CAUTION  
• When the air conditioner is operated with a combustion appliance in the same place, be careful of ventilation to let fresh air enter  
the room. Poor ventilation causes oxygen shortage.  
• When the air conditioner is used in a closed room, be careful of sufficient ventilation of the room.  
Poor ventilation causes oxygen shortage.  
Do not touch the aluminum fins of the unit.  
Doing so may result in injury.  
Do not touch the aluminum fins of the unit.  
Doing so may result in injury.  
Repairs  
• When you have noticed that some kind of trouble (such as when an error display has appeared, there is a smell of burning,  
abnormal sounds are heard, the air conditioner fails to cool or heat or water is leaking) has occurred in the air conditioner, do not  
touch the air conditioner yourself but set the circuit breaker to the OFF position, and contact a qualified service person.  
Take steps to ensure that the power will not be turned on (by marking “out of service” near the circuit breaker, for instance) until  
qualified service person arrives. Continuing to use the air conditioner in the trouble status may cause mechanical problems to  
escalate or result in electric shocks, etc.  
CAUTION  
CAUTION  
• If you have discovered that the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to the OFF  
position, and contact a qualified service person to have the repairs done.  
BURST HAZARD  
BURST HAZARD  
Do not set the circuit breaker to the ON position until the repairs are completed.  
Open the service valves before the operation,  
otherwise there might be the burst.  
Open the service valves before the operation,  
otherwise there might be the burst.  
• If you have discovered that there is a danger of the indoor unit’s falling, do not approach the indoor unit but set the circuit breaker  
to the OFF position, and contact a qualified installer or a qualified service person to refit the unit.  
Do not set the circuit breaker to the ON position until the unit has been refitted.  
• If you have discovered that there is a danger of the outdoor unit’s toppling over, do not approach the outdoor unit but set the  
circuit breaker to the OFF position, and contact a qualified installer or a qualified service person to have the improvements or  
refitting done. Do not set the circuit breaker to the ON position until the improvements or refitting is completed.  
– 3 –  
– 4 –  
Owner’s Manual  
Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Relocation  
n Information on theTransportation, Handling and Storage of the Carton  
• When the air conditioner is to be relocated, do not relocate it yourself but contact a qualified installer or a qualified service  
person. Failure to relocate the air conditioner properly may result in electric shocks and/or a fire.  
Examples of indication on the carton  
(∗1) Refer to the “Definition of Qualified Installer or Qualified Service Person.”  
CAUTION  
Symbol  
Description  
Symbol  
Description  
TO DISCONNECTTHE APPLIANCE FROMTHE MAINS SUPPLY  
• This appliance must be connected to the mains by means of a switch with a contact separation of at least 3 mm.  
• The installation fuse 25A must be used for the power supply line of this air conditioner.  
Keep dry  
Fragile  
Do not drop  
CAUTIONS ABOUT INSTALLATION (Be sure to confirm the following cautions.)  
• Certainly lay the drain hose for perfect draining.  
Bad drainage may cause flooding in the house and getting furniture wet.  
• Make sure to connect the air conditioner to an exclusive power supply of the rated voltage, otherwise the unit may break  
down or cause a fire.  
Do not lay down  
CAUTIONS ABOUT OPERATION  
• Do not use this air conditioner for special purpose such as preserving food, precision instruments, art objects, breeding  
animals, car, vessel, etc.  
• Do not touch any switches with wet finger, otherwise you may get an electric shock.  
• If the air conditioner will not be used for a considerably long time, turn off the main switch or the circuit breaker, for safety.  
• To make the air conditioner operate in its original performance, operate it within the range of the operating temperature  
specified in the instructions. Otherwise it may cause a malfunction, or water leak from the unit.  
11  
cartons  
Stacking height  
(12 cartons can be stacked in  
this case)  
Do not walk on this carton  
• Prevent any liquid from falling into the remote controller. Do not spill juice, water or any kind of liquid.  
This side up  
Do not step  
Handle with care  
Other cautions  
CAUTION  
Injury possibility.  
Description  
CAUTION  
Injury possibility.  
Don’t hande with packing  
band, or may get injured  
in case of brolen band.  
Don’t handle with packing band, or may get injured in case of broken band.  
Stacking notice.  
In case that cardboard boxes protrude out of pallet when stacking.  
Lay a 10 mm thick plywood over the pallet.  
– 5 –  
– 6 –  
Owner’s Manual  
Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
2
PART NAMES  
3
WIRED REMOTE CONTROLLER  
This remote controller can control the operation of up to 8 indoor units.  
n Indoor unit  
n Display section  
Air discharge  
Connect a discharge duct.  
In the display illustration below all the icons are shown.  
When the unit is in operation, only relevant icons will be displayed.  
Display  
section  
• When turning on the leak breaker at the first time,  
on the display part of the remote controller.  
• While this icon is flashing, the model is being automatically confirmed.  
flashes  
Air intake  
Connect a suction duct.  
TEMP.  
ON / OFF  
Wait till  
icon has disappeared to use the remote controller.  
TIMER SET  
TIME  
FAN  
SAVE  
MODE  
VENT  
Operation  
section  
FILTER  
RESET TEST  
SET  
CL  
SWING/FIX  
UNIT LOUVER  
Electrical control box  
The earth screw is provided in the  
electrical control box.  
11  
12  
10  
3 4  
Drain pan  
Separate sold part  
Remote controller  
1
2
6
9
5
7
13  
15  
14  
8
n Outdoor unit  
Air intake  
(Side and rear)  
1 Operation mode  
6 Timer mode display  
The selected operation mode is displayed.  
The selected timer mode is displayed.  
2 Error display  
7 Filter display  
Displayed while the protective device works or a  
error occurs.  
Reminder to clean the air filter.  
Front panel  
8 Fan speed display  
Fan speed is not adjustable. It is fixed to High.  
(HIGH)  
There is an earth screw, valves,  
and electric parts inside.  
3 SETTING display  
Displayed during setup of the timer or other settings.  
Air discharge  
4 TEST run display  
9 Set temperature display  
Displayed during a test run.  
The selected set temperature is displayed.  
5 Timer display  
10 Power saving mode display  
Pipe cover  
When an error occurs, error code is displayed.  
Limits compressor speed (capacity) to save  
energy.  
Wire connection holes  
Mounting leg  
Refrigerant pipe connection  
holes  
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Owner’s Manual  
Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Operation section  
Push each button to select a desired operation.  
• The control saves commands in memory and after the initial setting, there is no need for any additional settings unless  
changes are desired. The air conditioner can be operated by pushing the  
button.  
11  
12  
10  
3 4  
5
6
1
2
5
6
7
1
2
7
9
9
8
10  
13  
15  
3
4
11  
14  
8
12  
11 UNIT No. display  
13 Remote controller sensor display  
1
button (Temperature set button)  
Adjusts the set point.  
Select the desired set point by pushing  
TEMP. or TEMP.  
9
button (Ventilation button)  
Use when a power ventilation kit (locally procured)  
is connected.  
Displays the number of the indoor unit selected.  
Displayed while the sensor of the remote  
controller is used.  
Also displays error code of indoor and outdoor  
units.  
.
• If “  
” is displayed on the remote controller  
when this button is pushed no vent kit connected.  
14 Pre-heat display  
Displayed when the heating mode is energized or  
defrost cycle is initiated.  
12 Central control display  
2
3
4
button (Timer set button)  
Use to setup the timer.  
10  
11  
button (Power save operation)  
Use to initiate power saving mode.  
Displayed when the air conditioner is used under  
the central control in combination with a central  
control remote controller.  
While this icon is displayed, the indoor fan stops.  
button (Filter reset button)  
Resets “ ” icon after cleaning filter.  
15 No function display  
button (Unit/Louver select button)  
Selects a unit number (left) and louver number  
(right).  
In case the remote controller is disabled by the  
central control system,  
Displayed when the function requested is not  
available on that model.  
flashes.  
button (Test button)  
Use only for service.  
(During normal operation, do not use this button.)  
The button operation is not accepted.  
UNIT:  
Even when you push ON/OFF, MODE, or TEMP.  
button, and the button operation is not accepted.  
Selects an indoor unit when multiple indoor units  
are controlled with one remote controller.  
(Settings made by the remote controller vary with  
the central control mode.  
For details, refer to the Owner’s Manual of the  
central control remote controller.)  
5
button  
When the button is pushed, the operation starts,  
and it stops by pushing the button again.  
LOUVER:  
No Function.  
When the operation has stopped, the operation  
lamp and all the displays disappear.  
12  
button (Swing/Louver direction  
button)  
6 Operation lamp  
No Function.  
Green light illuminates when unit is on.  
Although it flashes when operating the protection  
device or an error occurs.  
OPTION :  
Remote controller sensor  
Usually the temperature sensor of the indoor unit senses  
the temperature.  
The temperature on the surrounding of the remote  
controller can also be sensed.  
For details, contact the dealer from which you have  
purchased the air conditioner.  
7
8
button (Operation mode button)  
Selects desired operation mode.  
button (Fan speed button)  
Fan speed is not adjustable.  
It is fixed to High.  
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Owner’s Manual  
Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n 8°C OPERATION (For object pre-heating)  
4
CORRECT USAGE  
• When you use the air conditioner for the first time or when you change the setting, follow the steps below. Settings are  
(Available for Super Digital Inverter outdoor units)  
The air conditioner can control the heating temperature to about 8°C in the heating mode.  
saved in memory and are displayed anytime the unit is turned on by pushing the  
button.  
The 8°C heating operation requires settings with the wired remote controller. Ask the installer or dealer for the settings  
according to the installation manual of the indoor unit.  
n Preparation  
Start  
Turn on the main power switch and/or the leakage breaker.  
• When the power supply is turned on, a partition line is displayed on the display part of the remote controller.  
• After the power supply is turned on, the remote controller does not accept an operation for approx. 1 minute, but it is not a  
failure.  
1
2
Set the displayed temperature to 18°C in the heating mode by pushing TEMP.  
Set the displayed temperature to 8°C by pushing TEMP.  
button.  
button for at least four seconds.  
Stop  
REQUIREMENT  
1
Set the displayed temperature to 18°C by pushing TEMP.  
button.  
• The air conditioner returns to the normal HEAT mode. Select a desired temperature and operation mode.  
• While using the air conditioner, operate it only with  
leakage breaker.  
button without turning off the main power switch and the  
• When you re-power the air conditioner after it has not been used for a long period, turn on the leakage breaker at least  
12 hours before starting the air conditioner. (This is required to turn on the compressor case heater for warming in order  
to prevent overload on the compressor when activating the outdoor unit.)  
NOTE  
• The discharged air temperature is lower than that in the normal heating operation.  
• The room temperature may not be heated evenly depending on the remote controller installation location.  
• The room temperature may not reach 8°C depending on the room size or the installation conditions.  
The 8°C heating operation is cancelled in the following cases.  
Stop  
Push  
button.  
• When operation is stopped with  
• When another operation mode is selected with  
button  
button  
The operation lamp goes off, and the operation stops.  
• When temperature setting or operation mode is changed or operation is started/stopped by the wireless remote  
controller or the central control remote controller.  
• If one or more models other than the 4-way air discharge cassette type (4 series), slim duct, Concealed Duct High Static  
Pressure are connected in the same control group, the 8°C heating operation is not available.  
• When you use this operation mode, observe proper operating hours and we recommend that you ask service staff for  
periodic maintenance of the air conditioner.  
NOTE  
ON / OFF  
1
2
Auto Changeover  
• When in Auto Mode, the unit selects the operating mode  
(cooling, heating or fan only) based on the user selected  
set point temperature.  
3
DE  
FILTER  
RESET  
• If the Auto mode is uncomfortable, you can select the  
desired conditions manually.  
Cooling  
• If there is a demand for cooling, unit will start  
approximately 1 minute after mode is selected.  
Start  
Heating  
1 Push  
button.  
• If there is a demand for heating, unit will start  
approximately 3 to 5 minutes after the mode is selected.  
The operation lamp illuminates, and the  
operation starts.  
• After the heating operation has stopped, fan may continue  
to run for approx. 30 seconds.  
• When the room temperature reaches the set temperature,  
the outdoor unit stops and the indoor unit will carry on fan  
operation.  
2 Select an operation mode with the  
“
” button.  
One push of the button, and the display  
changes in the order shown below.  
During defrost operation, the fan stops so that cool air is  
not discharged. (“  
” Pre-heat is displayed.)  
When restarting the operation after stop  
• When attempting to restart the unit immediately after it was  
stopped, the unit can not start for approx. 3 minutes this is  
to protect the compressor.  
Cool  
Fan  
3 Select a desired set point by pushing  
the “TEMP. ” or “TEMP. ” button.  
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Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
5
TIMER OPERATION  
• Three timer modes are available: (Setting of up to 168 hours is enabled.)  
Off timer : The unit stops when the set time is reached.  
Repeat Off timer : The unit stops daily when the set time is reached.  
6
POWER SAVING MODE  
• The power saving mode saves energy by limiting the maximum current which will effect heating or cooling capacity that  
the unit can generate.  
On timer  
: The unit starts when the set time is reached.  
Push  
button during operation.  
• The air conditioner enters power saving mode.  
appears on the display.  
•
1
Power saving mode will stay in effect until it is cancelled.  
To cancel the power saving mode, push button again.  
2
4
•
disappears.  
3
NOTE  
3 Push  
button.  
icon disappears and time display goes on,  
or icon flashes.  
Set  
1 Push  
• When other electric appliances are used at the same time, to avoid triggering the circuit breaker, power saving mode is  
recommended. Of course you can use power saving mode to save energy as well.  
• Power saving mode consumes less energy, but may not heat/cool the room as much as normal mode.  
(The maximum current is limited to approximately 75% (factory default) of the normal mode.)  
•
and  
button.  
(When On timer is activated, time and On timer  
are icons and other icons disappear.)  
The timer mode changes with every push of the button.  
• To adjust the power-save settings, see “Power saving mode” in ADVANCED SETTINGS.  
• Even when operation start/stop, operation mode change, or power reset is performed during the power saving mode, the  
power saving mode is retained until the next operation.  
4 Cancel timer operation  
Off  
Off  
On  
Push  
button.  
(Off timer)  
(Repeat Off timer)  
No display  
(On timer)  
Timer icon disappears.  
•
and timer display flashes.  
NOTE  
• When the operation stops after the timer reached the  
preset time, the Repeat Off timer resumes the operation  
2 Push  
to select “set time”.  
• With every push of  
button, the set time  
by pushing  
the time of the timer has reached the set time.  
• When you push while the Off timer function of  
button and stops the operation after  
increases by 0.5 hr (30 minutes).  
When setting a time more than 24 hours for timer  
operation, timer can be set in increments of 1 hr.  
The maximum set time is 168hr (7 days).  
The remote control displays the set time with time  
(between 0.5 and 23.5 hours) (∗1) or number of days  
and time (24 hours or more) (∗2) as shown below.  
the air conditioner is active, the indication of the timer  
function disappears and then appears again after about  
5 seconds.  
This is due to normal processing of the remote controller.  
• With every push of  
button, the set time  
decreases by 0.5 hr (30 minutes)  
(0.5 - 23.5 hours) or 1 hr (24 - 168 hours).  
Example of remote control display  
• 23.5 hours (∗1)  
• 34hours (∗2)  
Number of days Time  
shows 1 day (24 hours).  
shows 10 hours. (Total 34 hours)  
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Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
7
ADVANCED SETTINGS  
8
ENERGY SAVING RECOMMENDATIONS  
Select a comfortable set point and minimize adjusting it.  
n Power saving mode  
• Clean the filter when ever the filter display  
• Keep doors and windows closed and open them only when necessary.  
is illuminated on remote controller.  
Clean, please.  
• Use drapes, curtains, or shades to keep direct sun light from heating the room  
on very hot days.  
• Do not obstruct the return air grille.  
Adjust the air flow direction for even air distribution in the room.  
Checks before operating  
• Check whether the earth wires are properly connected.  
• Check whether the air filters are installed.  
1
3
• Turn on the leakage breaker at least 12 hours before operating.  
Protective device  
• The protective device stops operation when the air conditioner is overloaded.  
• When the protective device is activated, the current operation stops and the  
2
4
5
operation lamp and  
on the remote controller flash.  
1 Push  
button for at least four seconds when the air conditioner is not working.  
, symbol, and numbers flash.  
When the protective device is activated  
• When the protective device has been activated and stopped operation, turn off the leakage breaker immediately, and ask  
the installer to find the cause.  
If the air conditioner is operated without fixing the problem, the air conditioner may malfunction.  
• Check whether the air filters are installed.  
If the air filters are not installed, the air heat exchanger may be clogged with dust, which may result in water leakage.  
•
2 Push  
(left side of the button) to select an indoor unit to be set.  
• Each time you push the button, UNIT No. change  
as follows:  
UNITNo.  
1-1  
UNIT No.  
1-2  
UNIT No.  
1-3  
UNIT No.  
1-4  
For cooling  
The fan of the selected unit runs.  
• When the air inlet and/or outlet of the outdoor unit are blocked  
• When the air outlet of the outdoor unit is continuously exposed to strong wind  
3 Push TIME  
/
buttons, to adjust the power saving mode setting.  
• Each push of the button changes the power level  
by 1% within the range from 100% to 50%.  
For heating  
• When the air filters are clogged with too much dust or dirt  
• The factory default is 75%.  
• When the suction port and/or discharge port of the indoor unit are blocked  
Do not turn off the leakage breaker  
• Do not turn off the leakage breaker during a test run of the air conditioner. Use the ON/OFF button on the air conditioner  
instead to control the power.  
Setting of power level in  
power saving mode  
4 Push  
5 Push  
button.  
button to complete the setting.  
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Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Maintenance List  
9
MAINTENANCE  
Part  
Unit  
Check (visual/auditory)  
Maintenance  
WARNING  
Heat exchanger  
Indoor/outdoor • Dust/dirt clogging, scratches • Wash the heat exchanger when it is clogged.  
Cleaning the air filter and other parts of the air filter involves dangerous work in high places, so be sure  
to have a qualified installer or qualified service person to do it. Do not attempt it by yourself.  
• Take appropriate measures when abnormal sound is  
Fan motor  
Filter  
Indoor/outdoor • Sound  
generated.  
• Wash the filter with water when it is contaminated.  
Cleaning air filters  
Clogged air filters will reduce the cooling and heating performance.  
1
Indoor  
Indoor  
• Dust/dirt, breakage  
• Replace it when it is damaged.  
• Vibration, balance  
• Replace the fan when vibration or balance is terrible.  
• Brush or wash the fan when it is contaminated.  
1 If “ ” is displayed on the remote controller, clean the air filters.  
Fan  
• Dust/dirt, appearance  
2 When the cleaning of air filters has been completed, push  
button.  
• Fix or replace them when they are deformed or  
damaged.  
“
” disappears.  
Air inlet/outlet grilles  
Drain pan  
Indoor/outdoor • Dust/dirt, scratches  
2
CAUTION  
• Dust/dirt clogging,  
Indoor  
• Clean the drain pan and check the downward slope  
for smooth drainage.  
drain contamination  
Cleaning remote controller  
• Use a dry cloth to wipe the remote controller.  
Ornamental panel,  
louvers  
• Wash them when they are contaminated or apply  
repair coating.  
Indoor  
• Dust/dirt, scratches  
• Never use a damp cloth on the remote controller.  
• Rust, peeling of insulator  
• Peeling/lift of coat  
• Do not use a chemically-treated duster for wiping or leave such materials on the unit for long.  
It may damage or fade the surface of the unit.  
Exterior  
Outdoor  
• Apply repair coating  
• Do not use benzine, thinner, polishing powder, or similar solvents for cleaning.  
These may cause the plastic surface to crack or deform.  
Periodic check  
Long-period use of the air conditioner may cause deterioration or failure of parts due to heat,  
humidity, dust, and operating conditions, or may cause poor drainage of dehumidified water.  
Preparing for long Shut Down Period  
1) Clean the filters and reposition them in unit.  
2) Operate the unit in fan mode for 3 or 4 hours to dry all internal parts.  
3) Turn the unit off and disconnect the main power supply.  
4) Before unit is turned on again, make sure the circuit breaker has been  
turned on for at least 12 hours.  
Check points before operation  
1) Check that the air filters are installed.  
2) Check that the air outlet or inlet is not blocked.  
3) Turn on the main power switch or the circuit breaker for the main power supply to the air conditioner.  
NOTE  
For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air conditioner in use  
be cleaned and maintained regularly to ensure efficient operation of the air conditioner.  
When the air conditioner is operated for a long time, periodic maintenance (once a year) is recommended.  
Furthermore, regularly check the outdoor unit for rust and scratches, and remove them or apply rustproof treatment, if  
necessary.  
As a general rule, when an indoor unit is operated for 8 hours or more daily, clean the indoor unit and outdoor unit at least  
once every 3 months. Ask a professional for this cleaning/maintenance work.  
Such maintenance can extend the life of the product though it involves the owner’s expense.  
Failure to clean the indoor and outdoor units regularly will result in poor performance, freezing, water leakage, and even  
compressor failure.  
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Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
10  
AIR CONDITIONER OPERATIONS AND  
PERFORMANCE  
11  
INSTALLATION  
Do not install the air conditioner in the following places  
• Do not install the air conditioner in any place within 1 m from a TV, stereo, or radio set.  
If the unit is installed in such place, noise transmitted from the air conditioner affects the operation of these appliances.  
3 minutes protection function  
3-minutes protection function prevents the air conditioner from starting for initial 3 minutes after the main power switch/  
circuit breaker is turned on for re-starting the air conditioner.  
• Do not install the air conditioner near a high frequency appliance (sewing machine or massager for business use, etc.),  
otherwise the air conditioner may malfunction.  
• Do not install the air conditioner in a humid or oily place, or in a place where steam, soot, or corrosive gas is generated.  
• Do not install the air conditioner in a salty place such as seaside area.  
Power failure  
• Do not install the air conditioner in a place where a great deal of machine oil is used.  
• Do not install the air conditioner in a place where it is usually exposed to strong wind such as in seaside area.  
• Do not install the air conditioner in a place where sulfureous gas generated such as in a spa.  
• Do not install the air conditioner in a vessel or mobile crane.  
• Do not install the air conditioner in an acidic or alkaline atmosphere  
(in a hot-spring area or near a chemicals factory, or in a place subject to combustion emissions).  
Power failure during operation will stop the unit completely.  
• To restart the operation, push the ON/OFF button on the remote controller.  
• Lightning or a wireless car telephone operating nearby may cause the unit to malfunction.  
Turn off the main power switch or circuit breaker and then turn them on again.  
Push the ON/OFF button on the remote controller to restart.  
Corrosion may be generated on the aluminum fin and copper pipe of the heat exchanger.  
• Do not install the air conditioner near an obstacle (air vent, lighting equipment, etc.) that disturbs discharge air.  
(Turbulent airflow may reduce the performance or disable devices.)  
• Do not use the air conditioner for special purposes such as preserving food, precision instruments, or art objects, or  
where breeding animals or growing plants are kept. (This may degrade the quality of preserved materials.)  
• Do not install the air conditioner over an object that must not get wet.  
Heating characteristics  
Preheating operation  
The air conditioner will not deliver warm air immediately after it is turned on.  
Warm air will start to flow out after approximately 5 minutes when the indoor heat exchanger warmed up.  
(Condensation may drop from the indoor unit at a humidity of 80% or more or when the drain port is clogged.)  
Warm air control (In heating operation)  
When the room temperature has reached the set temperature while the outdoor unit is stopping, the indoor unit discharges  
wind with a very small air volume.  
• Do not install the air conditioner in a place where an organic solvent is used.  
• Do not install the air conditioner near a door or window subject to humid outside air.  
Condensation may form on the air conditioner.  
• Do not install the air conditioner in a place where special spray is used frequently.  
Defrosting operation  
If the outdoor unit is frosted during the heating operation, defrosting starts automatically (for approximately 2 to 10 minutes)  
to maintain the heating capacity.  
• The fans in both indoor and outdoor units will stop during the defrosting operation.  
Be careful with noise or vibrations  
• Do not install the air conditioner in a place where noise by outdoor unit or hot air from its air outlet annoys your neighbors.  
• Install the air conditioner on a solid and stable foundation so that it prevents transmission of resonating, operation noise  
and vibration.  
• During the defrosting operation, the defrosted water will be drained from the bottom plate of the outdoor unit.  
• If one indoor unit is operating, some sound may be audible from other indoor units that are not operating.  
Heating capacity  
In the heating operation, the heat is absorbed from the outside and brought into the room.  
This way of heating is called heat pump system. When the outside temperature is too low, it is recommended to use  
another heating apparatus in combination with the air conditioner.  
Attention to snowfall and freeze on the outdoor unit  
• In snowy areas, the air inlet and air outlet of the outdoor unit are often covered with snow or frozen up.  
If snow or freeze on the outdoor unit is left as it is, it may cause machine failure or poor warming.  
• In cold areas, pay attention to the drain hose so that it perfectly drains water without water remaining inside for freeze  
prevention. If water freezes in the drain hose or inside the outdoor unit, it may cause machine failure or poor warming.  
Air conditioner operating conditions  
For proper performance, operate the air conditioner under the following temperature conditions:  
Outdoor temperature : –15°C to 46°C  
Room temperature : 21°C to 32°C (Dry bulb temp.), 15°C to 24°C (Wet bulb temp.)  
Cooling operation  
Room relative humidity – less than 80 %. If the air conditioner operates in excess  
[CAUTION]  
of this figure, the surface of the air conditioner may cause dewing.  
Outdoor temperature : –20°C to 15°C (Wet bulb temp.)  
Heating operation  
Room temperature : 15°C to 28°C (Dry bulb temp.)  
If air conditioner is used outside of the above conditions, safety protection may work.  
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Owner’s Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
12  
TROUBLESHOOTING  
13  
SPECIFICATIONS  
CAUTION  
Sound power level (dB)  
Model  
Weight (Kg)  
If any of the following conditions occur, turn off the main power supply switch and immediately contact the dealer :  
• Switch operation does not work properly.  
• The main power fuse often blows out, or the circuit breaker is often activated.  
• A foreign matter or water fall inside the air conditioner.  
Cooling  
74  
Heating  
74  
RAV-SM2242DT-E  
RAV-SM2802DT-E  
160  
160  
75  
75  
• When the air conditioner does not operate even after the cause of the protective device activation has been removed.  
(The operation lamp and  
on the remote controller are flashing.)  
• Any other unusual conditions are observed.  
Declaration of Conformity  
Before you ask for servicing or repairs, check the following points.  
Manufacturer:  
Authorized  
Toshiba Carrier Corporation  
336 Tadehara, Fuji-shi, Shizuoka-ken 416-8521 JAPAN  
u Recheck  
Nick Ball  
Inoperative  
Representative/TCF holder: Toshiba EMEA Engineering Director  
Toshiba Carrier UK Ltd.  
• The main power switch is turned off.  
• The circuit breaker is activated to cut off power supply.  
• The main power fuse has blown out.  
Porsham Close, Belliver Industrial Estate,  
PLYMOUTH, Devon, PL6 7DB.  
Does not cool well or heat well  
United Kingdom  
• The air inlet and/or outlet of the outdoor unit is blocked.  
Hereby declares that the machinery described below:  
Generic Denomination: Air Conditioner  
• Doors or windows are opened.  
• The set temperature is too high (In cooling) or low (In heating).  
u These are not failures.  
Model/type:  
RAV-SM2242DT-E,  
RAV-SM2802DT-E,  
RAV-SM2242DT-TR,  
RAV-SM2802DT-TR  
Indoor unit or outdoor unit makes a strange noise.  
• When the temperature suddenly changes, the indoor or outdoor unit occasionally makes a strange noise because of  
expansion/ contraction of parts or change of refrigerant flow.  
• Air leaking noise is heard occasionally.  
Commercial name:  
Digital Inverter Series Air Conditioner  
It is generated by the solenoid valve when it is actuated.  
• A clattering sound is heard when the power is turned on.  
It is generated by the outdoor unit during preparation for operation.  
Complies with the provisions of the “Machinery” Directive (Directive 2006/42/EC) and the regulations transposing into  
national law  
The room air is smelly or a bad odor comes from the air conditioner.  
• Smells impregnated in the walls‚ carpets, furniture, clothing, or furs, come out.  
Complies with the provisions of the following harmonized standard:  
EN 378-2: 2008  
Outdoor unit is frosted in heating operation.  
Water drains from outdoor unit.  
• he outdoor unit is sometimes frosted in heating operation.  
NOTE  
In that case, the unit automatically performs defrosting (for 2 to 10 minutes) for increasing the heating efficiency.  
• In defrosting operation, both the indoor and outdoor units stop air flow.  
• Hiss sound is heard when flow of the refrigerant is changed for defrosting.  
• Resultant water of automatic defrosting in heating operation drains from outdoor unit.  
This declaration becomes invalid if technical or operational modifications are introduced without the manufacturer’s consent.  
Information according to EMC Directive 2004/108/EC  
A white mist of chilled air or water is generated from the outdoor unit.  
• When the indoor unit in cooling operation or the outdoor unit in defrosting operation occasionally steams.  
Check these items. If any of these problems still remains, stop the operation, turn off the leakage breaker, and then  
notifies the dealer of the serial number and details of the error. Never repair any part by yourself as it is dangerous.  
(Name of the manufacture)  
(Address, city, country)  
TOSHIBA CARRIER CORPORATION  
336 Tadehara, Fuji-shi, Shizuoka-ken  
416-8521 Japan  
When  
and a combination of  
and a number are displayed on the remote controller, also inform  
,
,
,
or  
(Name of the Importer/Distributor)  
(Address, city, country)  
TOSHIBA CARRIER UK Ltd.  
the dealer of the display content.  
Porsham Close, Belliver Industrial Estate, PLYMOUTH,  
Devon, PL6 7DB. United Kingdom  
– 21 –  
– 22 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Thank you for purchasing this Toshiba air conditioner.  
Please read carefully through these instructions that contain important information which complies with the “Machinery”  
Directive (Directive 2006/42/EC), and ensure that you understand them.  
12. INSTALLATION MANUAL  
Some of the details provided in these instructions differ from the Installation Manual supplied with your product, and the  
instructions provided here take precedence.  
Original instruction  
After reading these instructions, be sure to keep them in a safe place together with the Owner’s Manual and Installation  
Manual supplied with your product.  
ADOPTION OF NEW REFRIGERANT  
This Air Conditioner uses R410A an environmentally friendly refrigerant.  
Generic Denomination: Air Conditioner  
Definition of Qualified Installer or Qualified Service Person  
The air conditioner must be installed, maintained, repaired and removed by a qualified installer or qualified service person.  
When any of these jobs is to be done, ask a qualified installer or qualified service person to do them for you.  
A qualified installer or qualified service person is an agent who has the qualifications and knowledge described in the table  
below.  
Agent  
Qualifications and knowledge which the agent must have  
Contents  
• The qualified installer is a person who installs, maintains, relocates and removes the air conditioners  
made by Toshiba Carrier Corporation.  
1
2
3
4
5
6
7
8
9
PRECAUTIONS FOR SAFETY .......................................................................................... 5  
ACCESSORY PARTS ......................................................................................................... 8  
SELECTION OF INSTALLATION PLACE.......................................................................... 9  
INSTALLATION ................................................................................................................ 11  
FAN CHARACTERISTICS................................................................................................ 15  
DRAIN PIPINGWORK ..................................................................................................... 18  
REFRIGERANT PIPING AND EVACUATING .................................................................. 22  
ELECTRICAL CONNECTION .......................................................................................... 25  
APPLICABLE CONTROLS .............................................................................................. 28  
He or she has been trained to install, maintain, relocate and remove the air conditioners made by Toshiba  
Carrier Corporation or, alternatively, he or she has been instructed in such operations by an individual or  
individuals who have been trained and is thus thoroughly acquainted with the knowledge related to these  
operations.  
• The qualified installer who is allowed to do the electrical work involved in installation, relocation and  
removal has the qualifications pertaining to this electrical work as stipulated by the local laws and  
regulations, and he or she is a person who has been trained in matters relating to electrical work on the  
air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in  
such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with  
the knowledge related to this work.  
Qualified installer  
• The qualified installer who is allowed to do the refrigerant handling and piping work involved in installation,  
relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as  
stipulated by the local laws and regulations, and he or she is a person who has been trained in matters  
relating to refrigerant handling and piping work on the air conditioners made by Toshiba Carrier  
Corporation or, alternatively, he or she has been instructed in such matters by an individual or individuals  
who have been trained and is thus thoroughly acquainted with the knowledge related to this work.  
• The qualified installer who is allowed to work at heights has been trained in matters relating to working at  
heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been  
instructed in such matters by an individual or individuals who have been trained and is thus thoroughly  
acquainted with the knowledge related to this work.  
• The qualified service person is a person who installs, repairs, maintains, relocates and removes the air  
conditioners made by Toshiba Carrier Corporation.  
10 TEST RUN ........................................................................................................................ 35  
11 MAINTENANCE ............................................................................................................... 36  
12 TROUBLESHOOTING...................................................................................................... 38  
He or she has been trained to install, repair, maintain, relocate and remove the air conditioners made by  
Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such operations by an  
individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge  
related to these operations.  
• The qualified service person who is allowed to do the electrical work involved in installation, repair,  
relocation and removal has the qualifications pertaining to this electrical work as stipulated by the local  
laws and regulations, and he or she is a person who has been trained in matters relating to electrical work  
on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been  
instructed in such matters by an individual or individuals who have been trained and is thus thoroughly  
acquainted with the knowledge related to this work.  
Qualified service  
person  
• The qualified service person who is allowed to do the refrigerant handling and piping work involved in  
installation, repair, relocation and removal has the qualifications pertaining to this refrigerant handling and  
piping work as stipulated by the local laws and regulations, and he or she is a person who has been  
trained in matters relating to refrigerant handling and piping work on the air conditioners made by Toshiba  
Carrier Corporation or, alternatively, he or she has been instructed in such matters by an individual or  
individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work.  
• The qualified service person who is allowed to work at heights has been trained in matters relating to  
working at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or  
she has been instructed in such matters by an individual or individuals who have been trained and is thus  
thoroughly acquainted with the knowledge related to this work.  
– 1 –  
– 2 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Definition of Protective Gear  
When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective gloves and ‘safety’  
work clothing.  
n Warning Indications on the Air Conditioner Unit  
In addition to such normal protective gear, wear the protective gear described below when undertaking the special work  
detailed in the table below.  
Warning indication  
Description  
Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns, electric  
shocks and other injuries.  
WARNING  
WARNING  
Work undertaken  
Protective gear worn  
ELECTRICAL SHOCK HAZARD  
ELECTRICAL SHOCK HAZARD  
Protective gloves  
“Safety” working clothing  
All types of work  
Disconnect all remote electric power supplies  
before servicing.  
Disconnect all remote electric power supplies  
before servicing.  
Gloves to provide protection for electricians and from heat  
Insulating shoes  
Electrical-related work  
Clothing to provide protection from electric shock  
Work done at heights (50 cm or more)  
Transportation of heavy objects  
Repair of outdoor unit  
Helmets for use in industry  
WARNING  
WARNING  
Shoes with additional protective toe cap  
Gloves to provide protection for electricians and from heat  
Moving parts.  
Moving parts.  
Do not operate unit with grille removed.  
Stop the unit before the servicing.  
Do not operate unit with grille removed.  
Stop the unit before the servicing.  
CAUTION  
CAUTION  
High temperature parts.  
High temperature parts.  
You might get burned when removing this panel.  
You might get burned when removing this panel.  
CAUTION  
CAUTION  
Do not touch the aluminum fins of the unit.  
Doing so may result in injury.  
Do not touch the aluminum fins of the unit.  
Doing so may result in injury.  
CAUTION  
CAUTION  
BURST HAZARD  
BURST HAZARD  
Open the service valves before the operation,  
otherwise there might be the burst.  
Open the service valves before the operation,  
otherwise there might be the burst.  
– 3 –  
– 4 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Refrigerant piping  
1
PRECAUTIONS FOR SAFETY  
• Install the refrigerant pipe securely during the installation work before operating the air conditioner.  
If the compressor is operated with the valve open and without refrigerant pipe, the compressor sucks air and the refrigeration  
cycles is over pressurized, which may cause a injury.  
• Tighten the flare nut with a torque wrench in the specified manner.  
Excessive tighten of the flare nut may cause a crack in the flare nut after a long period, which may result in refrigerant leakage.  
WARNING  
General  
• After the installation work, confirm that refrigerant gas does not leak.  
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may be generated.  
• Before starting to install the air conditioner, read carefully through the Installation Manual, and follow its instructions to  
install the air conditioner.  
• Only a qualified installer (*1) or qualified service person (*1) is allowed to install the air conditioner.  
If the air conditioner is installed by an unqualified individual, a fire, electric shocks, injury, water leakage, noise and/or  
vibration may result.  
• When the air conditioner has been installed or relocated, follow the instructions in the Installation Manual and purge the air  
completely so that no gases other than the refrigerant will be mixed in the refrigerating cycle.  
Failure to purge the air completely may cause the air conditioner to malfunction.  
• Nitrogen gas must be used for the airtight test.  
• The charge hose must be connected in such a way that it is not slack.  
• Before opening the intake grille of the indoor unit or service panel of the outdoor unit, set the circuit breaker to the OFF position.  
Failure to set the circuit breaker to the OFF position may result in electric shocks through contact with the interior parts.  
Only a qualified installer (∗1) or qualified service person (∗1) is allowed to remove the intake grille of the indoor unit or  
service panel of the outdoor unit and do the work required.  
• Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breaker to the OFF  
position. Otherwise, electric shocks may result.  
• Place a “Work in progress” sign near the circuit breaker while the installation, maintenance, repair or removal work is  
being carried out. There is a danger of electric shocks if the circuit breaker is set to ON by mistake.  
• Only a qualified installer (∗1) or qualified service person (∗1) is allowed to undertake work at heights using a stand of  
50 cm or more or to remove the intake grille of the indoor unit to undertake work.  
• Wear protective gloves and safety work clothing during installation, servicing and removal.  
• Do not touch the aluminium fin of the outdoor unit. You may injure yourself if you do so.  
If the fin must be touched for some reason, first put on protective gloves and safety work clothing, and then proceed.  
• Do not climb onto or place objects on top of the outdoor unit.  
You may fall or the objects may fall off of the outdoor unit and result in injury.  
• When working at heights, use a ladder which complies with the ISO 14122 standard, and follow the procedure in the  
ladder’s instructions. Also wear a helmet for use in industry as protective gear to undertake the work.  
• When cleaning the filter or other parts of the outdoor unit, set the circuit breaker to OFF without fail, and place a “Work in  
progress” sign near the circuit breaker before proceeding with the work.  
• When working at heights, put a sign in place so that no-one will approach the work location, before proceeding with the work.  
Parts and other objects may fall from above, possibly injuring a person below.  
• The refrigerant used by this air conditioner is the R410A.  
• You shall ensure that the air conditioner is transported in stable condition.  
• Do not move or repair any unit by yourself. There is high voltage inside the unit.  
You may get electric shock when removing the cover and main unit.  
• If refrigerant gas has leaked during the installation work, ventilate the room immediately.  
If the leaked refrigerant gas comes in contact with fire, noxious gas may be generated.  
Electrical wiring  
• Only a qualified installer (∗1) or qualified service person (∗1) is allowed to carry out the electrical work of the air conditioner.  
Under no circumstances must this work be done by an unqualified individual since failure to carry out the work properly may  
result in electric shocks and/or electrical leaks.  
• When connecting the electrical wires, repairing the electrical parts or undertaking other electrical jobs, wear gloves to provide  
protection for electricians and from heat, insulating shoes and clothing to provide protection from electric shocks.  
Failure to wear this protective gear may result in electric shocks.  
• Use wiring that meets the specifications in the Installation Manual and the stipulations in the local regulations and laws.  
Use of wiring which does not meet the specifications may give rise to electric shocks, electrical leakage, smoking and/or a fire.  
• Be sure to connect earth wire. (Grounding work) Incomplete grounding causes an electric shock.  
• Do not connect ground wires to gas pipes, water pipes, and lightning rods or ground wires for telephone wires.  
• After completing the repair or relocation work, check that the ground wires are connected properly.  
• Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the local regulations and laws.  
• Install the circuit breaker where it can be easily accessed by the agent.  
• When installing the circuit breaker outdoors, install one which is designed to be used outdoors.  
• Under no circumstances must the power cable be extended.  
Connection trouble in the places where the cable is extended may give rise to smoking and/or a fire.  
• Electrical wiring work shall be conducted according to law and regulation in the community and installation manual.  
Failure to do so may result in electrocution or short circuit.  
Test run  
• Before operating the air conditioner after having completed the work, check that the electrical parts box cover of the indoor unit  
and service panel of the outdoor unit are closed, and set the circuit breaker to the ON position.  
You may receive an electric shock if the power is turned on without first conducting these checks.  
• When you have noticed that some kind of trouble (such as when an error display has appeared, there is a smell of burning,  
abnormal sounds are heard, the air conditioner fails to cool or heat or water is leaking) has occurred in the air conditioner, do not  
touch the air conditioner yourself but set the circuit breaker to the OFF position, and contact a qualified service person.  
Take steps to ensure that the power will not be turned on (by marking “out of service” near the circuit breaker, for instance) until  
qualified service person arrives.  
Selection of installation location  
• If you install the unit in a small room, take appropriate measures to prevent the refrigerant from exceeding the limit  
concentration even if it leaks.  
Consult the dealer from whom you purchased the air conditioner when you implement the measures.  
Accumulation of highly concentrated refrigerant may cause an oxygen deficiency accident.  
• Do not install the air conditioner in a location that may be subject to a risk of exposure to a combustible gas.  
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.  
Continuing to use the air conditioner in the trouble status may cause mechanical problems to escalate or result in electric shocks, etc.  
• After the work has finished, be sure to use an insulation tester set (500V Megger) to check the resistance is 2 MΩ or more  
between the charge section and the non-charge metal section (Earth section).  
If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s side.  
• Upon completion of the installation work, check for refrigerant leaks and check the insulation resistance and water drainage.  
Then conduct a test run to check that the air conditioner is operating properly.  
• When transporting the air conditioner, wear shoes with additional protective toe caps.  
• When transporting the air conditioner, do not take hold of the bands around the packing carton.  
You may injure yourself if the bands should break.  
• Install the indoor unit at least 2.5 m above the floor level since otherwise the users may injure themselves or receive  
electric shocks if they poke their fingers or other objects into the indoor unit while the air conditioner is running.  
• Do not place any combustion appliance in a place where it is directly exposed to the wind of air conditioner, otherwise it  
may cause imperfect combustion.  
Explanations given to user  
• Upon completion of the installation work, tell the user where the circuit breaker is located.  
If the user does not know where the circuit breaker is, he or she will not be able to turn it off in the event that trouble has occurred  
in the air conditioner.  
• If you have discovered that the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to the OFF  
position, and contact a qualified service person (∗1) to have the repairs done.  
Do not set the circuit breaker to the ON position until the repairs are completed.  
• After the installation work, follow the Owner’s Manual to explain to the customer how to use and maintain the unit.  
Installation  
• When the indoor unit is to be suspended, the designated hanging bolts (M10 or W3/8) and nuts (M10 or W3/8) must be used.  
• Install the air conditioner at enough strong places to withstand the weight of the unit.  
If the strength is not enough, the unit may fall down resulting in injury.  
• Follow the instructions in the Installation Manual to install the air conditioner. Failure to follow these instructions may  
cause the product to fall down or topple over or give rise to noise, vibration, water leakage, etc.  
• The designated bolts (M10, M12) and nuts (M10, M12) for securing the outdoor unit must be used when installing the unit.  
Relocation  
• Only a qualified installer (∗1) or qualified service person (∗1) is allowed to relocate the air conditioner.  
It is dangerous for the air conditioner to be relocated by an unqualified individual since a fire, electric shocks, injury, water  
leakage, noise and/or vibration may result.  
• When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe.  
Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause air, etc. to be  
sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly resulting in rupture, injury  
or other trouble.  
• Install the outdoor unit property in a location that is durable enough to support the weight of the outdoor unit.  
Insufficient durability may cause the outdoor unit to fall, which may result in injury.  
(∗1) Refer to the “Definition of Qualified Installer or Qualified Service Person.”  
– 5 –  
– 6 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
CAUTION  
2
ACCESSORY PARTS  
New Refrigerant Air Conditioner Installation  
Part name  
Q’ty  
Shape  
Usage  
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE  
LAYER.  
(Be sure to hand over to customers)  
(For other languages that do not appear in this Installation Manual,  
please refer to the enclosed CD-R.)  
• The characteristics of R410A refrigerant are; easy to absorb water, oxidizing membrane or oil, and its pressure is approx.  
1.6 times higher than that of refrigerant R22.  
Installation Manual  
1
This manual  
Accompanied with the new refrigerant, refrigerating oil has also been changed. Therefore, during installation work, be  
sure that water, dust, former refrigerant, or refrigerating oil does not enter the refrigerating cycle.  
Owner’s Manual  
1
(Be sure to hand over to customers)  
• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of the  
main unit and installation tools are changed from those for the conventional refrigerant.  
• Accordingly the exclusive tools are required for the new refrigerant (R410A).  
• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not enter.  
1
1
For heat insulation of Gas pipe connecting section  
For heat insulation of Liquid pipe connecting section  
Heat insulator  
To Disconnect the Appliance from Main Power Supply.  
• This appliance must be connected to the main power supply by means of a switch with a contact separation of at least 3 mm.  
• The installation fuse must be used for the power supply line of this conditioner.  
Joint (Ø22.2 – Ø28.6 mm)  
1
For connecting the gas side pipe  
– 7 –  
– 8 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Installation space  
(Unit: mm)  
3
SELECTION OF INSTALLATION PLACE  
Reserve space required for maintenance the indoor unit and service work.  
Upon approval of the customer, install the air conditioner in a place that satisfies the following  
conditions.  
• Place where the unit can be installed horizontally.  
200 or more Servicing space  
• Place where a sufficient servicing space can be ensured for safety maintenance and check.  
• Place where drained water will not cause any problem.  
Avoid installing in the following places.  
• Place exposed to air with high salt content (seaside area), or place exposed to large quantities of sulfide gas (hot spring).  
(Should the unit be used in these places, special protective measures are needed.)  
Concealed duct  
high static  
pressure  
• A restaurant kitchen where a lot of oil is used or place near machines in a factory  
(Oil adhering to the heat exchanger and resin part (fan) in the indoor unit may reduce the performance, generate mist or  
dew drop, or deform or damage resin parts.)  
• Place where organic solvent is used nearby.  
• Place close to a machine generating high frequency.  
• Place where the discharged air blows directly into the window of the neighbour house. (Outdoor unit)  
1000 or more  
Check port with carrying  
in port 600 × 600  
Air flow direction  
• Place where noise of the outdoor unit is easily transmitted.  
(When install the outdoor unit on the boundary with the neighbour, pay due attention to the level of noise.)  
• Place with poor ventilation.  
(Before air duct installation, check whether value of air volume, static pressure and duct resistance are correct.)  
<Installation example>  
Concealed duct  
• Do not use the air conditioner for special purposes such as preserving food, precision instruments, or art objects, or  
where breeding animals or growing plants are kept. (This may degrade the quality of preserved materials.)  
• Place where any of high-frequency appliances (including inverter devices, private power generators, medical equipment,  
and communication equipment) and inverter-type fluorescent light is installed.  
Filter chamber  
Air inlet chamber  
high static pressure  
Air outlet chamber  
(A malfunction of the air conditioner, abnormal control, or problems due to noise to such appliances/equipment may occur.)  
• When the wireless remote controller is used in a room equipped with an inverter-type fluorescent light or at a place  
exposed to direct sunlight, signals from the remote controller may not be received correctly.  
• Place where organic solvent is used.  
• Place where special spray is used frequently.  
Duct hose  
Duct hose  
n Installation under high-humidity atmosphere  
In some cases including the rainy season, especially inside of the ceiling may become high-humidity atmosphere  
(dew-point temperature: 23°C or higher).  
1. Installation to inside of the ceiling with tiles on the roof  
Duct hose  
2. Installation to inside of the ceiling with slated roof  
3. Installation to a place where inside of the ceiling is used for pathway to intake the fresh air  
Air flow direction  
• In the above cases, additionally attach the heat insulator to all positions of the air conditioner, which come to contact  
with the high-humidity atmosphere. In this case, arrange the side plate (Check port) so that it is easily removed.  
• Apply also a sufficient heat insulation to the duct and connecting part of the duct.  
REQUIREMENT  
[Reference]  
Condensation test conditions  
Indoor side: 27°C dry bulb temperature  
24°C wet bulb temperature  
Air volume: Low air volume, operation time 4 hours  
1. Attach the optional accessories (drain-up kit etc.) on the unit before installing the unit.  
Also, set the check port with carrying in port to the side surface of the unit except air inlet panel.  
2. Prepare the check port with carrying in port hole with the size of 600x600mm.  
n Filter cleaning sign term setting  
The lighting term setup of the filter sign (Notification of filter cleaning) of the remote controller can be changed according to  
the condition of installation. For setup method, refer to “Filter sign setting” and “To secure better effect of heating” in the  
Applicable controls of this Manual.  
– 9 –  
– 10 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Installation of hanging bolt  
n Installation of indoor unit  
4
INSTALLATION  
• Consider the piping/wiring after the unit is hung when  
determining the location of the indoor unit installation  
and orientation.  
Treatment of ceiling  
The ceiling differs according to structure of building.  
WARNING  
For details, consult your constructor or interior finish  
contractor.  
In the process after the ceiling board has been removed, it  
is important to reinforce ceiling foundation (frame) and to  
keep horizontal level of installed ceiling correctly in order  
to prevent vibration of ceiling board.  
• Attach the nuts and the M10 flat washers to the hanging  
bolt.  
• Put washers at up and down of the hanging bracket of  
the indoor unit to hang down the indoor unit.  
• After the location of the indoor unit installation has been  
determined, install hanging bolts.  
• For the dimensions of the hanging bolt pitches, refer to  
the external view.  
• When a ceiling already exists, lay the drain pipe,  
refrigerant pipe, system interconnection wires, and  
remote controller wires to their connection locations  
before hanging the indoor unit.  
Procure hanging bolts washer and nuts for installing the  
indoor unit (these are not supplied).  
• Install the air conditioner certainly to sufficiently withstand the weight.  
• If the strength is insufficient, the unit may fall down resulting in human injury.  
• Perform a specified installation work to guard against strong wind or earthquake.  
• An incomplete installation can cause accidents by the units falling and dropping.  
REQUIREMENT  
Strictly comply with the following rules to prevent damage of the indoor units and human injury.  
• Do not put a heavy article on the indoor unit. (Even units are packaged)  
• Carry in the indoor unit as it is packaged if possible.  
If carrying in the indoor unit unpacked by necessity, be sure to use buffering cloth, etc. to not damage the unit.  
• To move the indoor unit, hold the hooking metals (4 positions) only.  
• Using a level vial, check that four sides are horizontal.  
(Horizontal degree: Within 5mm)  
Hanging bolt  
Nut  
M10 or W3/8  
M10 or W3/8  
M10  
4 pieces  
12 pieces  
8 pieces  
Washer  
Do not apply force to the other parts (refrigerant pipe, drain pan, foamed parts, or resin parts, etc.).  
• Hanging bolt pitch of air inlet chamber side is different (centre position), make sure not to make mistake to install the  
setting direction.  
• Carry the package by two or more persons, and do not bundle it with plastic band at positions other than specified.  
Hanging bolt  
M10 flat washer  
(W3/8 or M10)  
Installation of hanging bolt  
Use M10 hanging bolts (4 pcs, to be local procure).  
Matching to the existing structure, set pitch according to  
size in the unit external view as shown below.  
Nut  
(W3/8 or M10)  
M10 flat washer  
Nut  
(W3/8 or M10)  
n External Dimensions  
(Unit: mm)  
New concrete slab  
Install the bolts with insert brackets or anchor bolts.  
• Check that four sides are horizontal using a level vial.  
(Horizontal degree: Within 5mm)  
Rubber  
Anchor bolt  
(Blade type (Slide type (Pipe hanging  
bracket)  
bracket)  
anchor bolt)  
REQUIREMENT  
• Hang the unit in a horizontal position.  
Steel flame structure  
When unit is hanged to slant, it may cause overflow of  
drainage.  
• Install the unit within the dimension according to the  
figure below.  
• Using level vial or vinyl hose to confirm whether the unit  
is hang horizontally.  
Use existing angles or install new support angles.  
Hanging bolt  
4-M10 hanging bolt  
(Local procure)  
1288 (Hanging bolt pitch)  
1328  
Hanging bolt  
Support angle  
Electrical control box  
Side view  
Front view  
Existing concrete slab  
Refrigerant pipe connecting port  
(Gas side Ø22.2 Brazed)  
Refrigerant pipe connecting port  
(Liquid side Ø12.7 Flared)  
Water pouring  
Vinyl hose  
Use a hole-in anchors, hole-in plugs, or a hole-in bolts.  
1250  
Set the drain pipe connecting  
port side within 5mm lower  
than opposite side.  
Set the air inlet and air outlet  
sides are within 5mm with  
each other.  
22  
Drain pipe  
connecting port  
624  
698  
46  
65  
– 11 –  
– 12 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Diagrams for making connecting flanges  
(Unit: mm)  
n Duct design  
The connecting flange (Incl. the fixing screw) is not supplied to the indoor unit.  
When the connecting flange is necessary, produce them in locally.  
Drawing figure is as follows. (Material: Galvanized steel plate, thickness of 1.6 mm)  
1. In order to prevent short circuits, design the duct installation, so that the intake and discharge openings are not adjacent  
to each other.  
2. The indoor unit does not have a built-in air filter. Make sure to set up the filter chamber etc. and install the air filter  
(Locally procured).  
<Air outlet port flange>  
If no air filter is installed, the heat exchanger will be blocked by dust, which may cause the malfunction of air conditioner  
or the water leakage.  
<Duct installation example (First floor)>  
1130  
65  
250  
250  
250  
250  
65  
Air outlet chamber  
(with heat insulation)  
High efficiency filter  
inserting port  
Air outlet port  
connecting flange  
Pre filter  
1080  
inserting port  
Flexible duct hanging band  
Duct hose (with heat insulation)  
Air inlet port  
connecting flange  
25  
25  
Indoor unit  
10-Ø8 hole  
<Air inlet port connecting flange>  
Electrical  
control box  
Filter  
Air inlet  
chamber chamber  
1130  
65  
250  
250  
250  
250  
65  
Ceiling  
Duct hose  
1080  
Air outlet port  
Air outlet port  
Check port or carrying  
in port (600 × 600)  
25  
25  
Check port cap  
To ground floor  
From ground floor  
10-Ø8 hole  
NOTE  
All duct connection between units except outdoor unit must be procured and enforced locally.  
– 13 –  
– 14 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
5
FAN CHARACTERISTICS  
Current value as a criterion, adjust the air volume value to become within the range of the chart below.  
<RAV-SM2242 Type>  
<RAV-SM2802 Type>  
Standard air volume: 3600m³/h  
8
Standard air volume: 4200m³/h  
8.5  
8
7.5  
7
7.5  
7
6.5  
High static pressure tap (50Hz)  
6.5  
6
High static pressure tap (50Hz)  
6
5.5  
5
Medium static pressure tap (50Hz)  
Low static pressure tap (50Hz)  
Medium static pressure tap (50Hz)  
Low static pressure tap (50Hz)  
5.5  
5
4.5  
4.5  
4
4
300  
250  
200  
150  
100  
350  
300  
250  
200  
150  
100  
High static pressure tap (50Hz)  
Medium static pressure tap (50Hz)  
Low static pressure tap (50Hz)  
50  
5
High static pressure tap (50Hz)  
Medium static pressure tap (50Hz)  
50  
5
2800  
3000  
3400  
3800  
4200 4400  
4320  
2880  
Lower limit of air volume  
3200  
3600  
Air volume (m³/h)  
4000  
Low static pressure tap (50Hz)  
Upper limit of air volume  
3200 3400  
3800  
4200  
4600  
5000 5200  
4800 5040  
3360  
3600  
4000  
4400  
Lower limit of air volume  
Air volume (m³/h)  
Upper limit of air volume  
REQUIREMENT  
Add a air volume damper to the air supply duct, and adjust the air volume in the range from 80% to 120% of the standard  
air volume.  
– 15 –  
– 16 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Wire connection change of fan motor  
6
DRAIN PIPING WORK  
This duct is composed of 3 fan motors.  
To change external static pressure by duct resistance, connect the 3 connectors of the orange lead wires that are  
connected to the underside of the fan tap changing terminal block to the same number (F1, F2 or F3) terminal.  
CAUTION  
The wires of the fan motor has been connected to (F2) [External static pressure 137Pa (14mmAq)] as factory default.  
Following the Installation Manual, perform the drain piping work that water is properly drained, and apply a heat  
insulation not to cause a dew condensation.  
Low static pressure (F1)  
Inappropriate piping work may cause the water leakage in the room and wet of furniture.  
YEL : Yellow  
FM  
FM  
FM  
BLU : Blue  
REQUIREMENT  
ORG : Orange  
Fan motor  
Fan motor  
Fan motor  
• The drain piping flows the natural drainage. Make sure to set the drain piping from the unit with descending slope of 1/50  
to 1/100 and do not make up-down or trap in the midway.  
• Set the horizontal pulling of the drain pipe to 20m or less. When drain piping is too long, attach the support bracket at  
intervals of 1.5m to 2m to avoid the pipe becomes undulant as shown in figure below.  
F
1
F2  
F3  
F4  
F1 F2 F3 F4  
F1 F2 F3 F4  
<Example for installation of the main piping (Incl. piping support)>  
FAN3  
FAN2  
FAN1  
Standard (Middle) static pressure (F2)  
Fan tap changing terminal block  
Electrical control box  
As long as possible  
1.5 to 2 m  
FM  
FM  
FM  
Up-down bend  
Control  
P.C. board  
Fan motor  
Fan motor  
Fan motor  
4P terminal block  
3P terminal block  
Trap  
Descending slop of  
1/50 to 1/100  
Descending slop of  
1/50 to 1/100  
VP-30  
F1 F2 F3 F4  
F1 F2 F3 F4  
F1 F2 F3 F4  
FAN2  
FAN1  
FAN3  
2P terminal block  
High static pressure (F3)  
• Be sure to connect the drain pipe to the air conditioner with adhesive to avoid water leakage from the joint portion.  
• Condensation may occur on the drain pipes including collective pipes.  
All drain pipes must be wrapped with heat insulator to prevent dew condensation.  
Especially a part where drain pipe is connected to the indoor unit must be firmly insulated with the provided heat insulator.  
FM  
FM  
FM  
Fan motor  
Fan motor  
Fan motor  
F1 F2 F3 F4  
F1 F2 F3 F4  
F1 F2 F3 F4  
FAN2  
FAN1  
FAN3  
Terminal block No.  
Fan motor wiring  
External static pressure Pa (mmAq)  
Remarks  
Yellow  
Low static pressure  
F1  
69 (7)  
Blue  
F2  
F3  
137 (14)  
196 (20)  
Factory default  
Middle static pressure  
Orange  
High static pressure  
∗ Do not use F4.  
NOTE  
When the external static pressure is changed, write down the static pressure once change in the wiring diagram of the  
indoor unit is made.  
– 17 –  
– 18 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Pipe material, size and insulator  
n Check the draining  
The following materials for piping work and insulating process are procured locally.  
Check if the water can flow out properly during the test run. Also, check if no water leakage from the piping connection port.  
Hard vinyl chloride pipe socket for VP25  
REQUIREMENT  
Pipe material  
Hard vinyl chloride pipe VP25 (Nominal outer diameter Ø32mm)  
Foamed polyethylene foam, thickness: 10mm or more  
• Do drain test even if installation of heating season.  
• Pour water into the drain pan port of the air inlet port gently using the kettle or hose when duct is not connected to the  
drain pipe. When duct is connected to the drain pipe, remove the Access plate and perform it.  
Insulator  
Access plate  
n Connecting drain pipe  
REQUIREMENT  
• Using adhesive agent for vinyl chloride, connect the hard vinyl chloride pipes certainly so that water does not leak.  
• It takes some time to dry and indurate the adhesive agent. (Refer to the manual of adhesive agent.)  
Do not apply any extra force on the connecting section until the adhesive agent dried.  
n Drain up  
Pour into the drain pan with a hose  
or other materials.  
• When install the drain up kit of optional accessory, read the Installation Manual supplied to a drain up kit.  
– 19 –  
– 20 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Heat insulating process  
7
REFRIGERANT PIPING AND EVACUATING  
• After drain check, covering the heat insulator for drain connecting section, wrap the drain pipe with heat insulator  
(Locally procured) without clearance from the end of the drain pipe connecting port of the indoor unit.  
n Refrigerant Piping  
n Liquid side refrigerant pipe  
connection  
1. If the outdoor units are to be mounted on a wall, make  
sure that the supporting platform is sufficiently strong.  
The platform should be designed and manufactured to  
maintain its strength over a long period of time, and  
sufficient consideration should be given to ensuring that  
the outdoor unit will not fall.  
2. Use general copper pipes with a wall thickness of  
0.8 mm for Ø12.7 mm, and with a wall thickness of  
1.0 mm for Ø28.6 mm (half hard).  
Do not use any copper pipes with a wall thickness  
less than these thicknesses.  
Permissible Piping Length and Height  
Difference  
They vary according to the outdoor unit.  
For details, refer to the Installation Manual attached to  
the outdoor unit.  
Drain pipe  
connecting port  
Heat insulation (Locally procured)  
Thickness 10mm or more  
Indoor unit  
Flaring  
• Cut the pipe with a pipe cutter.  
Remove burrs completely.  
Remaining burrs may cause gas leakage.  
• Insert a flare nut into the pipe, and flare the pipe.  
As the flaring sizes of R410A differ from those of  
refrigerant R22, the flare tools newly manufactured for  
R410A are recommended.  
3. Flare nut and flare works are also different from those of  
the conventional refrigerant.  
Take out the flare nut attached to the main unit of the air  
conditioner, and use it.  
REQUIREMENT  
B
However, the conventional tools can  
be used by adjusting projection  
margin of the copper pipe.  
When the refrigerant pipe is long, provide support brackets  
at intervals of 2.5 to 3 m to clamp the refrigerant pipe.  
Otherwise, abnormal sound may be generated.  
u Projection margin in flaring: B (Unit: mm)  
Rigid (Clutch type)  
CAUTION  
IMPORTANT 4 POINTS FOR PIPING WORK  
1. Remove dust and moisture from the inside of the  
connecting pipes.  
R410A tool used Conventional tool used  
Outer dia. of  
copper pipe  
R410A  
R410A  
2. Tight connection (between pipes and unit)  
3. Evacuate the air in the connecting pipes using VACUUM  
PUMP.  
12.7  
0 to 0.5  
1.5 to 2.0  
4. Check the gas leakage. (Connected points)  
u Flaring dia. meter size: A (Unit: mm)  
+0  
A
–0.02” (–0.4)  
Outer dia. of copper pipe  
n Pipe size  
R410A  
16.6  
12.7  
Gas side  
Liquid side  
Pipe size  
28.6 mm  
12.7 mm  
A
∗ In case of flaring for R410A with the  
conventional flare tool, pull it out approx.  
0.5 mm more than that for R22 to adjust to  
the specified flare size.  
The copper pipe gauge is useful for  
adjusting projection margin size.  
– 21 –  
– 22 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Tightening connection  
CAUTION  
Refrigerant amount to be added  
For addition of the refrigerant, add refrigerant “R410A”  
referring to the attached Installation Manual of outdoor unit.  
Heat insulation process  
Apply heat insulation for the pipes separately at liquid  
side and gas side.  
n Gas side refrigerant pipe  
connection  
Be sure to use a scale to charge the refrigerant of specified  
amount.  
For the heat insulation to the pipes at gas side, be sure to  
use the material with heat-resisting temperature 120°C or  
higher.  
Using the attached heat insulation material, apply the  
heat insulation to the pipe connecting section of the  
indoor unit securely without gap.  
• Turn up the pipe heat insulator to the unit side.  
• Wrap the pipe with wet cloth.  
Do not apply excessive torque. Otherwise, the  
nut may crack depending on the conditions.  
Turn up pipe heat insulator  
(Unit: N•m)  
REQUIREMENT  
• Charging an excessive or too little amount of refrigerant  
causes a trouble of the compressor.  
Be sure to charge the refrigerant of specified amount.  
• A personnel who charged the refrigerant should write  
down the pipe length and the added refrigerant amount in  
the nameplate attached to the service panel of the  
outdoor unit.  
It is necessary to fix the compressor and refrigeration  
cycle malfunction.  
Outer dia. of copper pipe  
Tightening torque  
Wet cloth  
12.7 mm (dia.)  
50 to 62 (5.0 to 6.2 kgf•m)  
REQUIREMENT  
Remove the all brazed part.  
• Apply the heat insulation to the pipe connecting section  
of the indoor unit securely up to the root without  
exposure of the pipe.  
(The pipe exposed to the outside causes water leak.)  
• Wrap heat insulator with its slits facing up (ceiling side).  
u Tightening torque of flare pipe connections  
Pressure of R410A is higher than that of R22.  
(Approx. 1.6 times)  
Therefore, using a torque wrench, tighten the flare pipe  
connecting sections which connect the indoor and  
outdoor units of the specified tightening torque.  
Incorrect connections may cause not only a gas leak,  
but also a trouble of the refrigeration cycle.  
• Remove the cup on the gas side piping by using a  
brazing machine.  
CAUTION  
Do not burn the pipe heat insulator.  
Remove the cap.  
Indoor unit  
Union  
Open the valve fully  
Open the valve of the outdoor unit fully.  
Align the centres of the connecting pipes and tighten  
the flare nut as far as possible with your fingers.  
A 4mm-hexagonal wrench is required for opening the valve.  
For details, refer to the Installation Manual attached to the  
outdoor unit.  
Then tighten the nut with a spanner and torque wrench  
as shown in the figure.  
Attached joint part  
Half union  
Flare nut  
Connection pipe  
Locally procured  
Ø28.6 mm  
Gas leak check  
Heat insulator  
of the pipe  
Check with a leak detector or soap water whether gas leaks  
or not, from the pipe connecting section or cap of the valve.  
Externally  
threaded side  
Internally  
threaded side  
• Braze the attached joint part to the gas side piping and  
braze the connection piping to the joint part.  
Heat insulation  
(Accessory)  
Flare nut  
Use a wrench to secure. Use a torque wrench to tighten.  
REQUIREMENT  
Brazing  
Use a leak detector manufactured exclusively for HFC  
refrigerant (R410A, R134a, etc.).  
REQUIREMENT  
Braze all around  
Brazing  
Tightening with an excessive torque may crack the nut  
depending on installation conditions.  
Tighten the nut within the specified tightening torque.  
• Turn back the pipe heat insulator and tie up with a  
banding band.  
Tie up with a banding band.  
Piping with outdoor unit  
• For details of installation, refer to the Installation Manual  
of the outdoor unit.  
n Evacuation  
Using a vacuum pump, perform vacuuming from the  
charge port of valve of the outdoor unit.  
For details, follow to the Installation Manual attached to the  
outdoor unit.  
• Never use the refrigerant sealed in the outdoor unit for  
evacuation.  
REQUIREMENT  
For the tools such as charge hose, etc., use those  
manufactured exclusively for R410A.  
– 23 –  
– 24 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Wire connection  
8
ELECTRICAL CONNECTION  
Remote controller wiring  
WARNING  
REQUIREMENT  
2-core non polarity wire is used for the remote controller  
wiring.  
• Be sure to connect the wires matching the terminal numbers. Incorrect connection causes a trouble.  
• Be sure to pass the wires through the bushing of wire connection holes of the indoor unit.  
• Keep a margin (Approx. 100mm) on a wire to hang down the electrical control box at servicing, etc.  
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)  
1. Using the specified wires, ensure to  
connect the wires, and fix wires securely so  
that the external tension to the wires do not  
affect the connecting part of the terminals.  
Incomplete connection or fixation may cause a fire, etc.  
Wiring  
1. Figure below shows the wiring connections indoor  
power line and between the indoor and outdoor units  
and between the indoor units and remote controller.  
The wires indicated by the dash lines are provided at  
the installation place.  
2. Insulate the unsheathed redundant cords (conductors)  
with electrical insulation tape.  
Process them so that they do not touch any electrical or  
metal parts.  
2. Be sure to connect earth wire.  
(grounding work)  
Incomplete grounding cause an electric shock.  
Do not connect ground wires to gas pipes, water pipes,  
lightning rods or ground wires for telephone wires.  
1. Remove the cover of the electrical control box by taking off the mounting screws (2 positions)  
2. Tighten the screws of the terminal block, and fix the wires with cord attached to the electrical control box.  
(Do not apply tension to the connecting section of the terminal block.)  
3. Mount the cover of the electrical control box without pinching wires.  
<Terminal block of electrical control box>  
3. Appliance shall be installed in accordance  
with national wiring regulations.  
Capacity shortage of power circuit or incomplete  
installation may cause an electric shock or a fire.  
n Wiring diagram  
Electrical control  
box cover  
System interconnecting Wired remote controller connecting  
Terminal block Terminal block  
CAUTION  
Indoor fan power supply  
Terminal block  
Outdoor Input power  
380-415V 3N~, 50 Hz  
• If incorrect/incomplete wiring is carried out, it will cause  
an electrical fire or smoke.  
• Be sure to install an earth leakage breaker that is not  
tripped by shock waves.  
If an earth leakage breaker is not installed, an electric  
shock may be caused.  
L
L
L
1
2
3
Fixing screw  
Outdoor  
unit  
N
• Be sure to use the cord clamps attached to the product.  
1
1
2
3
Circuit breaker  
Bushing  
• Do not damage or scratch the conductive core and inner  
insulator of power and inter-connecting wires when  
peeling them.  
• Use the power cord and Inter-connecting wire of  
specified thickness, type, and protective devices  
required.  
(Leakage breaker)  
Indoor Fan Input power  
220-240V~, 50 Hz  
2
3
L
Indoor  
unit  
N
A
B
Indoor fan  
power supply wire  
Wired  
remote controller wire  
Circuit breaker  
(Leakage breaker)  
REQUIREMENT  
System interconnecting wire  
Cord clamp  
• For power supply wiring, strictly conform to the Local  
Regulation in each country.  
Wired remote controller  
• Power supply for indoor unit must be exclusive and  
separated from the one for outdoor unit.  
• For wiring of power supply of the outdoor units, follow  
the Installation Manual of each outdoor unit.  
• Never connect 220–240V power to the terminal blocks  
( A , B , etc.) for control wiring.  
(Otherwise, the system will fail.)  
n Power and Wiring Specification  
• Perform the electric wiring so that it does not come to  
contact with the high-temperature part of the pipe.  
The coating may melt resulting in an accident.  
• After connecting wires to the terminal blocks, provide a  
trap and fix wires with the cord clamp.  
• Run the refrigerant piping line and control wiring line in  
the same line.  
Indoor fan Power supply  
Maximum running current  
Fuse rating  
220-240V~, 50 Hz  
15A  
25A  
3 × 2.5mm² or more  
(H07 RN-F or 60245 IEC 66)  
Indoor fan power supply wire∗  
• Do not turn on the power of the indoor unit until  
vacuuming of the refrigerant pipes completes.  
4 × 1.5mm² or more  
(H07 RN-F or 60245 IEC 66)  
System interconnecting wires∗  
∗ Number of wire × wire size  
– 25 –  
– 26 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Group control  
9
APPLICABLE CONTROLS  
Wired remote controller  
(Unit: mm)  
Procedure 1  
REQUIREMENT  
R (L) S (N)  
Push  
button and TEMP.  
button simultaneously for  
• When you use this air conditioner for the first time, it takes  
approx. 5 minutes until the remote controller becomes  
available after power-on. This is normal.  
at least 4 seconds.  
After a while, the display flashes as shown in the figure.  
Confirm that the CODE No. is [01].  
A
B
A
B
Indoor Unit  
Indoor Unit  
<When power is turned on for the first time after  
installation>  
It takes approx. 5 minutes until the remote controller  
• If the CODE No. is not [01], push  
display content, and repeat the procedure from the  
beginning. (No operation of the remote controller is  
button to erase the  
accepted for a while after  
button is pushed.)  
becomes available.  
Approx. 5 minutes  
Remote  
Outdoor Unit  
Outdoor Unit  
Indoor fan power supply wire  
“SETTING”  
flashes  
“SETTING”  
goes out  
Power on  
controller  
is available  
(∗ Display content varies  
with the indoor unit model.)  
<When power is turned on for the second  
(or later) time>  
1
2
3
It takes approx. 1 minute until the remote controller  
becomes available.  
Procedure 2  
Each time you push  
button, indoor unit numbers  
Approx. 1 minute  
in the control group change cyclically.  
Select the indoor unit you want to change settings for.  
The fan of the selected unit runs.  
You can confirm the indoor unit for which you want to  
change settings.  
Remote  
controller  
is available  
“SETTING”  
flashes  
“SETTING”  
goes out  
Power on  
System interconnecting wire  
• Normal settings were made when the indoor unit was  
shipped from factory.  
Change the indoor unit settings as required.  
• Use the wired remote controller to change the settings.  
* The settings cannot be changed using the wireless  
remote controller, sub remote controller, or remote  
controller-less system (for central remote controller only).  
Therefore, install the wired remote controller to change  
the settings.  
n Remote Controller Wiring  
• Strip off approx. 9mm the wire to be connected.  
• Non polarity, 2 core wire is used for wiring of the remote controller. (0.5mm² to 2.0mm² wires)  
Procedure 3  
Using TEMP.  
/
buttons, specify CODE No.  
buttons, select SET DATA  
[
].  
✻✻  
Wiring diagram  
n Changing of setting applicable  
Procedure 4  
Using TIME  
/
control  
[
].  
✻✻✻✻  
Terminal block for  
Terminal block  
Basic procedure for changing settings  
Change the settings while the air conditioner is not working.  
(Be sure to stop the air conditioner before making settings.)  
Procedure 5  
remote controller wiring of indoor unit  
Push  
button. When the display changes from flashing  
to lit, the setup is completed.  
• To change settings of another indoor unit, repeat from  
A
B
A
B
Remote controller unit  
Procedure 2.  
Remote controller wire  
(Locally procured)  
• To change other settings of the selected indoor unit,  
repeat from Procedure 3.  
Use  
button to clear the settings.  
To make settings after  
from Procedure 2.  
button was pushed, repeat  
1
4
6
3
1 5  
2
– 27 –  
– 28 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Procedure 6  
n Power saving mode  
n Remote controller switch monitoring function  
When settings have been completed, push  
determine the settings.  
button to  
1. Push  
button for at least four seconds when the  
This function is available to call the service monitor mode from the remote controller during a test run to acquire  
temperatures of sensors of the remote controller, indoor unit, and outdoor unit.  
When  
button is pushed, “SETTING” flashes and then  
air conditioner is not working.  
the display content disappears and the air conditioner  
enters the normal stop mode. (While “SETTING” is flashing,  
no operation of the remote controller is accepted.)  
flashes.  
Indicates CODE No. “C2.”  
2. Select an indoor unit to be set by pushing  
(left side of the button).  
Each time you push the button, unit numbers change  
as follows:  
UNIT No.  
1-1  
UNIT No.  
1-2  
UNIT No.  
1-3  
2
4
n Filter sign setting  
UNIT No.  
1-4  
According to the installation condition, the filter sign term  
(Notification of filter cleaning) can be changed.  
Follow to the basic operation procedure  
The fan of the selected unit runs.  
3. Adjust the power save setting by pushing  
TIME buttons.  
Each push of the button changes the power level by 1%  
within the range from 100% to 50%.  
1
3
→
→
→
→
→
/
( 1 2 3 4 5 6 ).  
• For the CODE No. in Procedure 3, specify [01].  
• For the [SET DATA] in Procedure 4, select the SET  
1. Push  
and  
buttons simultaneously for at least 4 seconds to call the service monitor mode.  
The service monitor indicator lights up and the header indoor unit number is displayed first.  
∗ The factory default is 75%.  
DATA of filter sign term from the following table.  
CODE No. 00 is also displayed.  
SET DATA  
0000  
Filter sign term  
None  
2. Pushing TEMP.  
(See the following table.)  
3. Pushing (left side of the button), select an indoor unit to be monitored.  
The sensor temperatures of indoor units and their outdoor unit in the control group are displayed.  
/
buttons, select the number of sensor, etc. (CODE No.) to be monitored.  
0001  
150H  
0002  
2500H (Factory default)  
5000H  
4. Push  
button to return to the normal display.  
0003  
0004  
10000H  
Indoor unit data  
Outdoor unit data  
Data name  
Setting of power level  
in power saving mode  
CODE No.  
Data name  
CODE No.  
60  
n To secure better effect of  
01  
02  
Room temperature (remote controller)  
Indoor unit intake air temperature (TA)  
Outdoor unit heat exchanger (coil)  
temperature (TE)  
4. Determine the setting by pushing  
button.  
heating  
5. Push button to complete the setting.  
61  
62  
63  
64  
65  
6A  
Outside air temperature (TO)  
Compressor discharge temperature (TD)  
Compressor suction temperature (TS)  
—
Indoor unit heat exchanger (coil)  
temperature (TCJ)  
When it is difficult to obtain satisfactory heating due to  
installation place of the indoor unit or structure of the  
room, the detection temperature of heating can be raised.  
Also use a circulator, etc. to circulate heat air near the  
ceiling.  
03  
04  
F3  
Indoor unit heat exchanger (coil)  
temperature (TC)  
Indoor unit fan cumulative operating hours  
(× 1 h)  
Follow to the basic operation procedure  
Heatsink temperature (THS)  
Operating current (× 1/10)  
→
→
→
→
→
( 1 2 3 4 5 6 ).  
• For the CODE No. in Procedure 3, specify [06].  
• For the set data in Procedure 4, select the SET DATA of  
shift value of detection temperature to be set up from the  
table below.  
Compressor cumulative operating hours  
(× 100)  
F1  
SET DATA  
0000  
Detection temperature shift value  
No shift  
0001  
+1°C  
0002  
+2°C (Factory default)  
0003  
+3°C  
+4°C  
+5°C  
+6°C  
0004  
0005  
0006  
– 29 –  
– 30 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Procedure 3  
Procedure example 1  
n Group control  
1. Using TEMP.  
/
buttons, specify CODE No.  
Manual address setup procedure  
While the operation stops, change the setup.  
(Be sure to stop the operation of the unit.)  
[12]. (CODE No. [12]: Line address)  
2. Using TIME  
from [3] to [2].  
Group control for system of multiple units  
One remote controller can control up to 8 indoor units as a group.  
/
buttons, change the line address  
3. Push  
button.  
In this time, the setup finishes when the display  
changes from flashing to lighting.  
t Group control in single system  
7
3
4--22,,  
Indoor unit No. before setup change is displayed.  
4 --11,,  
3
Outdoor unit  
Indoor unit  
Outdoor unit  
Indoor unit  
Outdoor unit  
Indoor unit  
Outdoor unit  
Indoor unit  
Outdoor unit  
5 -1,  
6
5
-2  
Indoor unit  
7
3
4 -3,  
(Max. 8 units)  
5 --33,,  
Remote controller  
Finish of address setup by power-ON  
1
2,6  
Procedure 4  
Procedure 1  
• For wiring procedure and wiring method of the individual line (Identical refrigerant line) system, refer to  
“ELECTRICAL CONNECTION”.  
• Wiring between lines is performed in the following procedure.  
Connect the terminal block (A/B) of the indoor unit connected with a remote controller to the terminal blocks (A/B) of  
the indoor units of other indoor units by wiring the inter-unit wire of the remote controller.  
• When the power supply has been turned on, the automatic address setup starts and which indicates that address is  
being set up flashes on the display part.  
During setup of automatic address, the remote controller operation is not accepted.  
Required time up to the finish of automatic addressing is approx. 5 minutes.  
NOTE  
1. Using TEMP.  
/
buttons, specify CODE No.  
Push simultaneously  
or more.  
+
+
buttons for 4 seconds  
[13]. (CODE No. [13]: Indoor address)  
2. Using TIME buttons, change the indoor  
address from [3] to [2].  
/
After a while, the display part flashes as shown below.  
Check the displayed CODE No. is [10].  
• When the CODE No. is other than [10], push  
to erase the display and repeat procedure from the first  
3. Push  
button.  
button  
In this time, the setup finishes when the display  
changes from flashing to lighting.  
step. (After pushing  
button, operation of the remote  
controller is not accepted for approx. 1 minute.)  
(For a group control, No. of the firstly displayed indoor  
unit becomes the header unit.)  
Indoor unit No. before setup change is displayed.  
In some cases, it is necessary to change the address manually after setup of the automatic address according to the  
system configuration of the group control.  
(∗ Display changes according  
to the model No. of indoor unit.)  
Procedure 2  
Procedure 5  
Every pushing  
button, the indoor UNIT No. in the  
1. Using TEMP.  
/
buttons, specify CODE No.  
group control is displayed in order. Select the indoor unit of  
which setup is changed.  
[14]. (CODE No. [14]: Group address)  
2. Using TIME buttons, change the SET DATA  
/
In this time, the position of the indoor unit of which setup is  
changed can be confirmed because fan of the selected  
indoor unit operate.  
from [0001] to [0002]. (SET DATA [Header unit: 0001]  
[Follower unit: 0002])  
3. Push  
button.  
In this time, the setup finishes when the display  
changes from flashing to lighting.  
Indoor unit No. before setup change is displayed.  
– 31 –  
– 32 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Procedure 6  
To recognize the position of the  
corresponding indoor unit though the  
indoor UNIT No. is known  
Check the position during operation stop.  
(Be sure to stop operation of the set.)  
n 8°C Operation  
If there is other indoor unit to be changed, repeat  
procedure 2 to 5 to change the setup.  
When the above setup has finished, push  
the indoor UNIT No. before change of setup, specify CODE  
No. [12], [13], [14] in order with TEMP.  
and then check the changed contents.  
Address change check Before change:  
[3-3-1] → After change: [2-2-2]  
Pre-heating operation can be set for cold regions where  
room temperature drops to below zero.  
to select  
Procedure 1  
/
buttons,  
Push simultaneously  
+
+
buttons for 4 seconds  
or more when the air conditioner is not working.  
After a while, the display part flashes as shown below.  
Check the Displayed CODE No. is [10].  
• When the CODE No. is other than [10], push  
Pushing  
button clears the contents of which setup was  
changed. (In this case, procedure from 2 is repeated.)  
button  
to erase the display and repeat procedure from the first  
step. (After pushing  
controller is not accepted for approx. 1 minute.)  
button, operation of the remote  
Indoor unit No. before setup change is displayed.  
1
2
1,3  
(∗ Display changes according to  
Procedure 1  
the model No. of indoor unit.)  
Push simultaneously  
+
buttons for 4 seconds or  
more. After a while, the display part flashes and the  
display appears as shown below.  
In this time, the position can be checked because fan of  
the indoor unit operate.  
Procedure 2  
Every pushing  
button, the indoor unit No. in the  
group control is displayed in order.  
• For the group control, the indoor UNIT No. is displayed  
Select the indoor unit of which setup is changed.  
as [  
] and fans of all the indoor units in the group  
In this time, the position of the indoor unit of which setup is  
changed can be confirmed because fan of the selected  
indoor unit operate.  
control operate.  
Check the displayed CODE No. is [01].  
• When the CODE No. is other than [01], push  
button  
Procedure 7  
Procedure 3  
to erase the display and repeat procedure from the first  
step. (After pushing button, operation of the remote  
controller is not accepted for approx. 1 minute.)  
After check of the changed contents, push  
(Setup is determined.)  
button.  
Using TEMP.  
/
buttons, specify CODE No. [d1].  
When pushing  
status becomes the usual stop status.  
(When pushing  
button, the display disappears and the  
Procedure 4  
Using TIME  
/
buttons, select SET DATA [0001].  
button the operation from the remote  
controller is not accepted for approx. 1 minute.)  
SET DATA  
0000  
8°C Operation setting  
None (Factory default)  
8°C Operation setting  
∗ If the operation from the remote controller is not  
accepted even 1 minute or more passed after pushing  
button, it is considered that the address setup is  
incorrect.  
(∗ Display changes according to  
the model No. of indoor unit.)  
0001  
In this case, the automatic address must be again set  
up.  
Therefore repeat procedure of the setup change from  
the Procedure 1.  
Procedure 2  
In the group control, every pushing  
button, the  
Procedure 5  
indoor UNIT No. in the group control is displayed in order.  
Push  
button.  
In this time, the position of the indoor unit can be  
confirmed because only fan of the selected indoor unit  
operate.  
In this time, the setup finishes when the display changes  
from flashing to lighting.  
(For a group control, No. of the firstly displayed indoor unit  
becomes the header unit.)  
Procedure 6  
Push  
button. (Setup is determined.)  
Procedure  
After confirmation, push  
the usual mode.  
3
When pushing  
status  
Becomes the usual stop status.  
button, the display disappears and the  
button to return the mode to  
(When pushing  
controller is not accepted for approx. 1 minute.)  
button the operation from the remote  
When pushing  
status becomes the usual stop status.  
button, the display disappears and the  
(When pushing  
button the operation from the remote  
controller is not accepted for approx. 1 minute.)  
– 33 –  
– 34 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
10  
TEST RUN  
11  
MAINTENANCE  
Procedure 1  
CAUTION  
n Before test run  
Keep  
button pushed for 4 seconds or more.  
When connecting a return air duct to the unit, the cleaning method of the air filter differs according  
to the construction of duct end. Ask a qualified installer or qualified service person.  
[TEST] is displayed on the display part and the selection of  
mode in the test mode is permitted.  
• Before turning on the power supply, carry out the  
following procedure.  
1) Using 500V-megger, check that resistance of 1MΩ or  
more exists between the terminal block 1 to 3 and the  
earth (grounding).  
If resistance of less than 1MΩ is detected, do not run  
the unit.  
2) Check the valve of the outdoor unit being opened  
fully.  
• To protect the compressor at activation time, leave  
power-ON for 12 hours or more before operating.  
<Daily maintenance>  
Cleaning of air filter  
1. If  
is displayed on the remote controller, contact to qualified  
installer or qualified service person.  
2. Take out the air filter.  
Procedure 2  
• Push the extrusion of the air filter to inside and pull out it to  
take out the air filter.  
3. Cleaning with water or vacuum cleaner  
• If dirt is heavy, clean the air filter by tepid water with neutral  
detergent or water.  
• After cleaning with water, dry the air filter sufficiently in a  
shade place.  
1,2  
3
Push  
button.  
Procedure 3  
n Execute a test run  
Using  
button, select the operation mode, [Cool] or  
[Heat].  
Using the wired remote controller, operate the unit as  
usual.  
For the procedure of the operation, refer to the attached  
Owner’s Manual.  
A forced test run can be executed in the following  
procedure even if the operation stops by thermostat-OFF.  
• Do not run the air conditioner in a mode other than [Cool]  
or [Heat].  
• The temperature controlling function does not work  
during test run.  
4. Mount the air filter.  
5. After cleaning, push  
display disappears.  
.
• The detection of error is performed as usual.  
In order to prevent a serial operation, the forced test run is  
released after 60 minutes have passed and returns to the  
usual operation.  
CAUTION  
• Do not start the air conditioner while leaving air filter removed.  
• Push the filter reset button. ( indication will be turn off.)  
CAUTION  
• Do not use the forced test run for cases other than the  
test run because it applies an excessive load to the  
devices.  
Procedure 4  
PERIODIC MAINTENANCE  
• For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air conditioner in use  
be cleaned and maintained regularly to ensure efficient operation of the air conditioner.  
When the air conditioner is operated for a long time, periodic maintenance (once a year) is recommended.  
Furthermore, regularly check the outdoor unit for rust and scratches, and remove them or apply rustproof treatment, if  
necessary.  
As a general rule, when an indoor unit is operated for 8 hours or more daily, clean the indoor unit and outdoor unit at least  
once every 3 months. Ask a professional for this cleaning/maintenance work.  
Such maintenance can extend the life of the product though it involves the owner’s expense.  
Failure to clean the indoor and outdoor units regularly will result in poor performance, freezing, water leakage, and even  
compressor failure.  
After the test run, push  
button to stop a test run.  
(Display part is same as procedure 1.)  
Procedure 5  
Push  
check button to cancel (release from) the test run  
mode. ([TEST] disappears on the display and the status  
returns to a normal.)  
2, 4  
3
• When a drain pump kit (sold separately) is installed.  
If it is used in a place full of dust or oil mist, the pump will be clogged and proper drainage is disabled.  
Clean the drain pump periodically. For how to clean the drain pump, contact the dealer.  
1,5  
– 35 –  
– 36 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
Maintenance List  
12  
TROUBLESHOOTING  
Part  
Heat exchanger  
Fan motor  
Unit  
Check (visual/auditory)  
Maintenance  
• Wash the heat exchanger when it is clogged.  
n Confirmation and check  
n Confirmation of error log  
• Dust/dirt clogging,  
scratches  
Indoor/outdoor  
When an error occurred in the air conditioner, an error  
code and indoor UNIT No. appear on the display part of  
the remote controller.  
When an error occurred on the air conditioner, the error log  
can be confirmed with the following procedure.  
(The error history is stored in memory up to 4 errors.)  
Indoor/outdoor • Sound  
•
Take appropriate measures when abnormal sound is generated.  
The error code is only displayed during the operation.  
The log can be confirmed from both operating status and  
stop status.  
• Wash the filter with water when it is contaminated.  
• Replace it when it is damaged.  
Filter  
Fan  
Indoor  
Indoor  
• Dust/dirt, breakage  
If the display disappears, operate the air conditioner  
according to the following “Confirmation of error log” for  
confirmation.  
• Vibration, balance  
• Replace the fan when vibration or balance is terrible.  
• Brush or wash the fan when it is contaminated.  
2
• Dust/dirt, appearance  
Air inlet/outlet grilles Indoor/outdoor • Dust/dirt, scratches  
• Dust/dirt clogging,  
• Fix or replace them when they are deformed or damaged.  
• Clean the drain pan and check the downward slope for smooth  
drainage.  
3
1
Drain pan  
Indoor  
drain contamination  
Error code  
Indoor UNIT No. in  
which an error occurred  
Ornamental panel,  
louvres  
• Wash them when they are contaminated or apply repair  
coating.  
Indoor  
• Dust/dirt, scratches  
Procedure 1  
When pushing  
and  
buttons at the same time for  
• Rust, peeling of insulator  
• Peeling/lift of coat  
Exterior  
Outdoor  
• Apply repair coating.  
4 seconds or more, the following display appears.  
If is displayed, the mode enters in the error log mode.  
• [01: Order of error log] is displayed in CODE No..  
• [Error code] is displayed in CHECK.  
• [Indoor unit address in which an error occurred] is  
displayed in Unit No..  
Procedure 2  
Every pushing of  
button used to set temperature,  
the error log stored in memory is displayed in order.  
The numbers in CODE No. indicate CODE No. [01] (latest)  
→ [04] (oldest).  
REQUIREMENT  
Do not push  
button because all the error log of the  
indoor unit will be deleted.  
Procedure 3  
After confirmation, push  
display.  
button to return to the usual  
– 37 –  
– 38 –  
Installation Manual  
Installation Manual  
Concealed Duct High Static Pressure  
Concealed Duct High Static Pressure  
n Error codes and parts to be checked  
Wired remote  
Wired remote  
controller  
Air  
conditioner  
status  
Air  
conditioner  
status  
controller  
Judging  
device  
Judging  
device  
Main defective parts  
Parts to be checked / error description  
Main defective parts  
Parts to be checked / error description  
display  
display  
Indication  
Indication  
Incorrect remote controller setting – The header remote controller  
has not been set (including two remote controllers).  
Indoor  
Indoor  
Indoor address setting error –  
There are two or more header units in the group.  
No header remote controller  
L03  
L07  
Duplicated header indoor units  
Entire stop  
«
Remote  
E01  
∗
controller  
Remote controller communication error  
Remote controller transmission error  
No signal can be received from the indoor unit.  
Group line in individual indoor unit  
«
Indoor address setting error – There is at least one group-connected  
indoor unit among individual indoor units.  
Entire stop  
Remote System interconnecting wires, indoor P.C. board, remote controller –  
controller No signal can be sent to the indoor unit.  
E02  
E03  
∗
L08  
L09  
L10  
Indoor group address not set  
Indoor power level not set  
Outdoor unit P.C. board  
Indoor  
Indoor  
Indoor address setting error – Indoor address group has not been set. Entire stop  
Indoor power level has not been set. Entire stop  
«
Indoor unit-remote controller regular  
communication error  
Remote controller, network adapter, indoor P.C. board – No data is  
Indoor  
Auto-reset  
received from the remote controller or network adapter.  
Outdoor  
In the case of outdoor P.C. board jumper wire (for service) setting error. Entire stop  
Address setting, central control remote controller, network adapter  
Indoor unit-outdoor unit serial  
communication error  
System interconnecting wires, indoor P.C. board, outdoor P.C. board.  
Indoor  
Network  
adapter  
central control  
E04  
E08  
Auto-reset  
Auto-reset  
– Serial communication error between indoor unit and outdoor unit  
L20  
L29  
LAN communication error  
Other outdoor unit error  
– Duplication of address in central control communication.  
Auto-reset  
IPDU-CDB communication error  
Indoor address setting error –  
Indoor  
Other outdoor unit error Entire stop  
Duplicated indoor addresses  
«
The same address as the self-address was detected.  
1) Communication error between IPDU MCU and CDB MCU  
Outdoor  
Indoor  
Entire stop  
Entire stop  
2) Abnormal temperature was detected by the heat sink temp.  
sensor in IGBT.  
Remote controller address setting error – Two remote controllers are  
set as header in the double-remote controller control.  
Remote  
controller  
E09  
Duplicated header remote controllers  
CPU-CPU communication error  
∗
Abnormal external input into  
indoor unit (interlock)  
External devices, outdoor unit P.C. board – Abnormal stop due to  
incorrect external input into CN80  
(∗ The header indoor unit stops raising alarm and follower indoor  
units continue to operate.)  
L30  
L31  
Operation  
continued  
(thermostat  
OFF)  
Indoor P.C. board – Communication error between main MCU and  
motor microcomputer MCU  
E10  
E18  
Indoor  
Auto-reset  
Auto-reset  
Power supply phase sequence, outdoor unit P.C. board  
– Abnormal phase sequence of the 3-phase power supply  
Phase sequence error, etc.  
Outdoor  
Indoor P.C. board –  
Regular communication is not possible between header and follower  
indoor units or between twin header (main) and follower (sub) units.  
Header indoor unit-indoor follower unit  
regular communication error  
Indoor  
Indoor fan motor, indoor P.C. board – Indoor AC fan error  
(fan motor thermal relay activated) was detected.  
P01  
P03  
P04  
Indoor unit fan error  
Indoor  
Outdoor  
Outdoor  
Entire stop  
Entire stop  
Entire stop  
E31  
F01  
IPDU communication error  
Outdoor Communication error between IPDU and CDB  
Entire stop  
Auto-reset  
Outdoor unit discharge temp. error  
An error was detected in the discharge temp. releasing control.  
Indoor unit heat exchanger sensor  
(TCJ) error  
Heat exchanger sensor (TCJ), indoor P.C. board – Open-circuit or  
Indoor  
Outdoor unit high-pressure system  
error  
High-pressure switch – The IOL was activated or an error was  
detected in the high-pressure releasing control using the TE.  
short-circuit of the heat exchanger sensor (TCJ) was detected.  
Indoor unit heat exchanger sensor (TC)  
error  
Heat exchanger sensor (TC), indoor P.C. board – Open-circuit or  
Indoor  
F02  
F04  
Auto-reset  
Entire stop  
The power supply wire may be connected incorrectly.  
Check open phase and voltages of the power supply.  
short-circuit of the heat exchanger sensor (TC) was detected.  
P05  
P07  
P10  
P15  
Open phase detected  
Heat sink overheat  
Outdoor  
Outdoor  
Indoor  
Entire stop  
Entire stop  
Entire stop  
Entire stop  
Outdoor unit discharge temp. sensor  
(TD) error  
Outdoor temp. sensor (TD), outdoor P.C. board – Open-circuit or  
Outdoor  
Abnormal temperature was detected by the temp. sensor of the IGBT  
heat sink.  
short-circuit of the discharge temp. sensor was detected.  
Outdoor unit temp. sensor (TE/TS)  
error  
Outdoor temp. sensors (TE/TS), outdoor P.C. board – Open-circuit or  
Outdoor  
F06  
F07  
F08  
Entire stop  
Entire stop  
Indoor unit water overflow  
detected  
Drain pipe, clogging of drainage, float switch circuit, indoor P.C. board  
– Drainage is out of order or the float switch was activated.  
short-circuit of the heat exchanger temp. sensor was detected.  
TL sensor error  
Outdoor TL sensor may be displaced, disconnected or short-circuited.  
There may be gas leakage from the pipe or connecting part.  
Check for gas leakage.  
Gas leakage detected  
4-way valve error  
Outdoor  
Outdoor unit outside air temp. sensor  
error  
Outdoor temp. sensor (TO), outdoor P.C. board – Open-circuit or  
Outdoor  
Operation  
continued  
short-circuit of the outdoor air temp. sensor was detected.  
4-way valve, indoor temp. sensors (TC/TCJ)  
– An error was detected due to temperature drop of the indoor unit  
heat exchanger sensor when heating.  
Outdoor  
(Indoor)  
Auto-reset  
(Auto-reset)  
P19  
Indoor unit room temp. sensor (TA)  
error  
Room temp. sensor (TA), indoor P.C. board – Open-circuit or short-  
Indoor  
F10  
F12  
F13  
Auto-reset  
Entire stop  
Entire stop  
circuit of the room temp. sensor (TA) was detected.  
P20  
P22  
High-pressure protective operation  
Outdoor unit fan error  
Outdoor  
Outdoor  
High-pressure protection  
Entire stop  
Entire stop  
TS (1) sensor error  
Outdoor TS (1) sensor may be displaced, disconnected or short-circuited.  
Outdoor unit fan motor, outdoor unit P.C. board – An error (overcurrent,  
locking, etc.) was detected in the outdoor unit fan drive circuit.  
Abnormal temperature was detected by the temp. sensor of the IGBT  
heat sink.  
Heat sink sensor error  
Outdoor  
IGBT, outdoor unit P.C. board, inverter wiring, compressor  
– Short-circuit protection for compressor drive circuit devices  
(G-Tr/IGBT) was activated.  
F15  
F29  
F31  
Temp. sensor connection error  
Indoor unit, other P.C. board error  
Outdoor unit P.C. board  
Outdoor Temp. sensor (TE/TS) may be connected incorrectly.  
Entire stop  
Auto-reset  
Entire stop  
P26  
P29  
P31  
Outdoor unit inverter Idc activated  
Outdoor unit position error  
Other indoor unit error  
Outdoor  
Outdoor  
Indoor  
Entire stop  
Entire stop  
Indoor  
Indoor P.C. board – EEPROM error  
Outdoor unit P.C. board, high-pressure switch  
– Compressor motor position error was detected.  
Outdoor Outdoor P.C. board – In the case of EEPROM error.  
Current detect circuit, power voltage –  
Outdoor Minimum frequency was reached in the current releasing control or  
short-circuit current (Idc) after direct excitation was detected  
Another indoor unit in the group is raising an alarm.  
Entire stop  
Auto-reset  
H01  
Outdoor unit compressor breakdown  
Entire stop  
E03/L07/L03/L08 alarm check locations and error description  
H02  
H03  
H04  
Outdoor unit compressor lock  
Outdoor Compressor circuit – Compressor lock was detected.  
Entire stop  
Entire stop  
Entire stop  
: The air conditioner automatically enters the auto-address setting mode.  
«
Current detect circuit, outdoor unit P.C. board – Abnormal current  
Outdoor  
Outdoor unit current detect circuit error  
Case thermostat operation (1)  
was detected in AC-CT or a phase loss was detected.  
Outdoor Malfunction of the case thermostat.  
Current, high-pressure switch circuit, outdoor P.C. board –  
Outdoor unit low-pressure system error Outdoor Ps pressure sensor error was detected or low-pressure protective  
operation was activated.  
H06  
Entire stop  
– 39 –  
– 40 –  
Revised: May, 2010  
13. DETACHMENTS  
13-1. Indoor Unit  
REQUIREMENT  
• At the service replacing time of the heat exchanger, the following tools are necessary.  
Prepare them before the service work.  
• Necessary tools: Plus screwdriver, monkey wrench, spanner, etc  
CAUTION  
• Be sure to place the heat exchanger at safe and flat place and then start the work.  
• Necessarily put gloves when starting the work. Working with the naked hands may cause injury on the hands.  
NOTE  
“Each fan motor weights approx. 8 kg. An air blower assembly with 1 fan weights approx. 20 kg and with 2 fans  
weights approx. 39 kg. An air blower assembly can be derived from main unit by one person. However, the assembly  
must be carried by two people.”  
Air blower assembly (1 fan type)  
Air blower assembly (2 fans type)  
13-2. How to replace the parts  
n Fan assembly and replacement  
No.  
Part name  
Fan assembly <Fan assembly>  
• SM224 type fan has the same construction  
Work procedure  
Remarks  
1
Appearance Fan assembly Fan assembly  
(1 fan)  
(2 fans)  
with SM280 type for assembling.  
1), 2)  
• Fan assembly is configured with assembly  
of 1 fan and assembly of 2 fans.  
Electric parts box cover  
(Ø4 screw: 2 positions)  
Fan assembly  
(2 fans)  
Fan asssembly  
(1 fan)  
– 102 –  
No. Part name  
Work procedure  
<Fan/Fan case>  
1) Take off screws (2 positions) of the electric  
parts box cover.  
Remarks  
1
Fan  
assembly  
(Continued)  
2) Remove the electric parts box cover.  
3) Cut the bundling band (3 positions) which  
binds the fan motor lead wires.  
4) Remove yellow (F1), blue (F2) and orange (F3)  
Faston terminals of the fan motor lead wires.  
5) Remove FAN1 (White), FAN2 (Blue) and FAN3  
(Red) connectors of the fan motor.  
Fan motor lead wire  
5)  
Faston terminal  
3)  
4)  
Connector  
Bundlling band  
6) Take off screws  
6)  
(Arrow mark indicating position) of the cabinet.  
(M5 screw: 8 positions)  
Screws  
7) Remove the temperature sensor lead wire from  
the cord clamp at the rear side of the cabinet.  
8) Put the removed electric parts box on the product.  
9) Remove lead wires of the fan motor from the  
cord clamp in the fan assembly.  
10) Take off screws (Arrow mark indicating  
position) of the fan assembly.  
(M5 screw: 3 positions)  
Electric parts box  
11) Pull out the fan assembly (a fan) toward you.  
8)  
7)  
Cord clamp  
9) Cord clamp  
10)  
11)  
Screws  
Screw  
Screw  
Pull out iit toward you  
Fan motor lead wire  
– 103 –  
No. Part name  
Work procedure  
Remarks  
1
Fan  
assembly  
12) Take off screws (Arrow mark indicating  
position) of the fan assembly.  
12)  
Screws  
(M5 screw × 3 positions)  
(Continued)  
13) Pull out the fan assembly (two fans) toward you.  
∗ Status when all the fan assemblies are pulled out ∗  
Pull out it toward you.  
Fan motoor earth  
(Ø4: 1 poosition)  
14)  
14) Take off earth screw (Arrow mark indicating  
position) of the fan motor.  
(Ø4 screw × 1 position)  
15) Take off screws (Arrow mark indicating  
position) which mount the fan case.  
(A side: M8 screw × 2 positions)  
(B side: M8 screw × 2 positions)  
(B side: Ø4 screw × 1 position)  
Fan case  
(M8 screw: 2 positions)  
A side  
15)  
16) Take off screws (Arrow mark indicating  
position) which mount the motor base.  
(M8 screw × 4 positions)  
17) Remove the bell mouth.  
(Ø4 screw × 8 positions)  
18) Loosen the set screw of the fan.  
(M8 screw × 1 position)  
19) Remove the fan.  
Bell mmouth  
(Ø4 sccrew: 88 posittions)  
B side  
15)  
17)  
Fan set screw  
18)  
(M8 screw: 1 position)  
Fan case  
(Ø4 sccrew:: 11 posittion)  
Fan case  
(M8 screw: 2 positions)  
16)  
19)  
Motor base  
(M8 screw: 4 positions)  
– 104 –  
No. Part name  
Work procedure  
Remarks  
1
Fan  
assembly  
(Continued)  
<Fan motor>  
1)  
1) Take off screws (Arrow mark indicating  
position) of the tightening band and then  
remove the tightening band, the fixing bracket  
and the fan motor.  
2) Cut the bundling band (2 positions) that fix the  
protective tube (white) on the relay connector  
of the fan motor.  
3) Remove the fan motor lead wire assembly and  
the protective tube from lead wire of the fan  
motor.  
4) Mount the fan motor lead wire assembly and  
the protective tube to the fan motor to be  
replaced, arrange the tube so that it covers the  
relay connector and then fix it with bundling  
band (2 positions).  
1)  
5) Put the fan motor to be replaced on the motor  
base.  
Set the fan motor so that label of the model  
name is at upper side when replaced.  
Tighteniing band  
(Ø4: 1 poosition foor left/rright each)  
∗ After replacement, assemble the fan motor in  
reverse order so that it becomes the same  
status as that before replacement.  
Be careful there is no loosening of screws  
when assembling.  
2), 3)  
Relay connector  
Protective tube Fan motor lead wire  
Check also that there is no fitting of fan with  
fan case, no air discharge and no abnormal  
sound  
Fan mottor lead  
wire assembly  
Fix the both ends of the  
protective tube so that it  
covers the relay connector section.  
4)  
Fan motor  
5)  
Fan motor model name label  
Motor base  
Fixing bracket  
Tightening band  
(Left): 2 pcs.  
(Right): 2 pcs.  
– 105 –  
14. EXPLODED VIEWS AND PARTS LIST  
14-1. Indoor Unit  
204, 205  
212  
211  
201 203  
208  
202  
210  
209  
206, 207  
Model Name  
RAV-SM  
Location  
Part No.  
Description  
No.  
2242DT-E  
2802DT-E 2242DT-TR 2802DT-TR  
201  
202  
203  
204  
205  
206  
207  
208  
209  
210  
4312C023 Motor, Fan  
43122106 Case, Fan  
43120237 Fan  
3
3
3
6
6
1
3
3
3
6
6
1
3
3
3
6
6
3
3
3
6
6
43139154 Band, Motor, Left  
43139155 Band, Motor, Right  
431S8155 Owner’s Manual  
431S8156 Owner’s Manual  
1
1
1
1
1
1
1
1
43166011 Remote Controller, SX-A4EE  
43166004 Remote Controller, SX-A11JE2  
43166012 Remote Controller, SX-A5EE  
1
1
1
1
1
1
Pump, Drain, PCD-4N230TF-2,  
43177009  
211  
212  
1
1
1
1
1
1
1
1
230V, 50/60Hz  
43151300 Switch, Float, FS-0208-603  
– 106 –  
215, 216, 217  
219  
218  
218  
214  
213  
Model Name  
RAV-SM  
Location  
No.  
Part No.  
Description  
2242DT-E  
2802DT-E 2242DT-TR 2802DT-TR  
213  
214  
215  
216  
217  
218  
219  
4314J446 Evaporator Ass’y  
4314Q091 Distributor Ass’y  
43047688 Nut, Flare, 1/2 IN  
43149332 Socket  
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
1
1
2
1
43147195 Bonnet, 1/2 IN  
43019904 Holder, Sensor  
43147726 Strainer  
– 107 –  
401  
404  
412  
405  
411  
410  
409  
414  
403  
407  
406  
408  
413  
402  
Model Name  
RAV-SM  
Location  
No.  
Part No.  
Description  
2242DT-E  
2802DT-E 2242DT-TR 2802DT-TR  
401  
402  
403  
404  
405  
406  
407  
408  
409  
410  
411  
412  
413  
414  
43155165 Capacitor, 12MF, 450VAC  
43050425 Sensor Ass’y, Service, TC  
43050426 Sensor, Service, TA  
3
2
1
2
1
1
1
3
1
1
1
1
1
3
3
2
1
2
1
1
1
3
1
1
1
1
1
3
3
2
1
2
1
1
1
3
1
1
1
1
1
3
3
2
1
2
1
1
1
3
1
1
1
1
1
3
43154141 Relay, LY2F-L, AC230V  
43158204 Transformer, TT-13 (AC220–240V)  
43160565 Terminal Block, 3P, 20A, AC250V  
43160575 Terminal Block, 2P, 20A, AC300V  
43060859 Fuse Block, 30A, 250V  
4316V419 P.C. Board Ass’y, MCC-1263  
4316V418 P.C. Board Ass’y, MCC-1403  
4316V247 P.C. Board Ass’y, MCC-1520  
43060157 Terminal Block, 4P  
43160582 Terminal, 4P  
43060700 Fuse, 10A, 250V  
– 108 –  
WARNINGS ON REFRIGERANT LEAKAGE  
Check of Concentration Limit  
Important  
The room in which the air conditioner is to be  
installed requires a design that in the event of  
refrigerant gas leaking out, its concentration will  
not exceed a set limit.  
NOTE 2 :  
The standards for minimum room volume are as follows.  
(1) No partition (shaded portion)  
The refrigerant R410A which is used in the air  
conditioner is safe, without the toxicity or combustibility  
of ammonia, and is not restricted by laws to be imposed  
which protect the ozone layer.  
However, since it contains more than air, it poses the  
risk of suffocation if its concentration should rise  
excessively. Suffocation from leakage of R410A is  
almost non-existent.  
With the recent increase in the number of high  
concentration buildings, however, the installation of  
multi air conditioner systems is on the increase because  
of the need for effective use of floor space, individual  
control, energy conservation by curtailing heat and  
carrying power etc.  
(2) When there is an effective opening with the  
adjacent room for ventilation of leaking refrigerant  
gas (opening without a door, or an opening 0.15%  
or larger than the respective floor spaces at the top  
or bottom of the door).  
Outdoor unit  
Most importantly, the multi air conditioner system is able  
to replenish a large amount of refrigerant compared with  
conventional individual air conditioners.  
Refrigerant piping  
Indoor unit  
If a single unit of the multi conditioner system is to be  
installed in a small room, select a suitable model and  
installation procedure so that if the refrigerant  
accidentally leaks out, its concentration does not reach  
the limit (and in the event of an emergency, measures  
can be made before injury can occur).  
In a room where the concentration may exceed the limit,  
create an opening with adjacent rooms, or install  
mechanical ventilation combined with a gas leak  
detection device.  
(3) If an indoor unit is installed in each partitioned room  
and the refrigerant piping is interconnected, the  
smallest room of course becomes the object. But  
when a mechanical ventilation is installed  
interlocked with a gas leakage detector in the  
smallest room where the density limit is exceeded,  
the volume of the next smallest room becomes the  
object.  
The concentration is as given below.  
Refrigerant piping  
Total amount of refrigerant (kg)  
Min. volume of the indoor unit installed room (m³)  
≤ Concentration limit (kg/m³)  
Outdoor unit  
Very  
small  
Indoor unit  
room  
The concentration limit of R410A which is used in multi  
air conditioners is 0.3kg/m³.  
Small  
room  
Medium  
room  
Large room  
Mechanical ventilation device - Gas leak detector  
NOTE 1 :  
If there are 2 or more refrigerating systems in a single  
refrigerating device, the amounts of refrigerant should  
be as charged in each independent device.  
NOTE 3 :  
The minimum indoor floor area compared with the  
amount of refrigerant is roughly as follows:  
(When the ceiling is 2.7m high)  
Outdoor unit  
e.g., charged  
e.g.,  
amount (10kg)  
40  
charged amount (15kg)  
Range below the  
35  
m²  
density limit  
of 0.3 kg/m³  
30  
25  
20  
15  
10  
5
(countermeasures  
not needed)  
Room A Room B Room C Room D Room E Room F  
Indoor unit  
Range above  
the density limit  
of 0.3 kg/m³  
(countermeasures  
needed)  
For the amount of charge in this example:  
The possible amount of leaked refrigerant gas in  
rooms A, B and C is 10kg.  
0
10  
20  
30  
The possible amount of leaked refrigerant gas in  
rooms D, E and F is 15kg.  
Total amount of refrigerant  
kg  
TOSHIBA CARRIER CORPORATION  
23-17, TAKANAWA 3 CHOME, MINATOKU, TOKYO, 108-8580, JAPAN  
Copyright © 1999 to 2010 TOSHIBA CARRIER CORPORATION, ALL Rights Reserved.  

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