Toshiba Air Conditioner RAS 13UAV E2 User Manual
FILE NO. SVM-03008  
SERVICE MANUAL  
AIR CONDITIONER  
SPLIT WALL TYPE  
RAS-13UKV-E2 / RAS-13UAV-E2  
Jun., 2003  
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FILE NO. SVM-03008  
10. HOW TO DIAGNOSE THE TROUBLE  
10-1 First Confirmation  
10-2 Primary Judgment  
10-3 Judgment by Flashing LED of Indoor Unit  
10-4 Self-Diagnosis by Remote Control (Check Code)  
10-5 Judgment of Trouble by Every Symptom  
10-6 Check Code 1C (Miswiring in indoor/outdoor units) and 1E  
10-7 How to Diagnose Trouble in Outdoor Unit  
10-8 How to Check Simply the Main Parts  
10-9 How to Simply Judge Whether Outdoor Fan Motor is Good or Bad  
11. HOW TO REPLACE THE MAIN PARTS  
11-1 Indoor Unit  
11-2 Microcomputer  
11-3 Outdoor Unit  
12. EXPLODED VIEWS AND PARTS LIST  
12-1 Indoor Unit (E-Parts Assy)  
12-2 Indoor Unit  
12-3 Outdoor Unit  
12-4 Outdoor Unit (E-Parts Assy)  
– 2 –  
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FILE NO. SVM-03008  
1. SPECIFICATIONS  
1-1. Specifications  
Unit model  
Indoor  
RAS-13UKV-E2  
Outdoor  
RAS-13UAV-E2  
Current limited  
Cooling capacity  
Cooling capacity range  
Heating capacity  
Heating capacity range  
Power supply  
—
3.5  
0.9 – 4.0  
4.2  
0.9 – 6.0  
(kW)  
(kW)  
(kW)  
(kW)  
220 – 240V –1Ph –50/60Hz  
Electric  
characteristics  
Indoor  
Operation mode  
Cooling  
0.15  
30  
Heating  
0.15  
30  
Running current  
Power consumption  
Power factor  
(A)  
(W)  
(%)  
87  
87  
Outdoor  
Operation mode  
Running current  
Power consumption  
Power factor  
Cooling  
4.65  
1020  
95  
Heating  
5.01  
1100  
95  
(A)  
(W)  
(%)  
(A)  
Starting current  
5.31  
COP (Cooling / Heating)  
Operation noise  
3.33/3.72  
39/39  
33/34  
26/28  
Indoor  
High  
(Cooling / Heating)  
(dB•A)  
(dB•A)  
(dB•A)  
(dB•A)  
Medium (Cooling / Heating)  
Low  
(Cooling / Heating)  
(Cooling / Heating)  
Outdoor  
48/50  
Indoor unit  
Unit model  
Dimension  
RAS-13UKV-E2  
Height  
Width  
Depth  
(mm)  
(mm)  
(mm)  
(kg)  
275  
790  
208  
10  
Net weight  
Fan motor output  
Air flow rate  
Unit model  
(W)  
(m3/h)  
30  
530/620  
RAS-13UAV-E2  
(Cooling / Heating)  
Outdoor unit  
Dimension  
Height  
Width  
Depth  
(mm)  
(mm)  
(mm)  
(kg)  
550  
780  
720  
40  
Net weight  
Compressor  
Motor output  
Type  
(W)  
750  
Twin rotary type with DC-inverter variable speed control  
Model  
DA91A1F-45F  
Fan motor output  
Air flow rate  
Type  
(W)  
(m3/h)  
43  
(Cooling / Heating)  
2410/2410  
Flare connection  
Piping connection  
Indoor unit  
Liquid side  
Gas side  
∅6.35  
∅9.52  
Outdoor unit  
Liquid side  
Gas side  
∅6.35  
∅9.52  
Maximum length (Per unit)  
Maximum chargeless length  
Maximum height difference  
Name of refrigerant  
Weight  
(m)  
(m)  
(m)  
15  
15  
10  
R410A  
Refrigerant  
(kg)  
0.9  
Wiring connection  
Power supply  
3 Wires: includes earth (Outdoor)  
Interconnection  
4 Wires: includes earth  
Usable temperature range  
Indoor  
(Cooling / Heating)  
(°C)  
21 – 32 / 0 – 28  
Outdoor (Cooling / Heating)  
Installation plate  
Wireless remote control  
Remote controller holder  
Flat head wood screw  
Purifying filter  
(°C)  
10 – 43 / –10 – 24  
Accessory  
Indoor unit  
1
1
1
2 (∅3.1 x 16L)  
1
Zeolite filter  
1
Batteries  
2
Mounting screw  
Installation manual  
Owner’s manual  
Drain nipple  
6 (∅4 x 25L)  
1
1
1
Outdoor unit  
• The specification may be subject to change without nitice for purpose of improvement.  
– 3 –  
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FILE NO. SVM-03008  
1-2. Operation Characteristic Curve  
<Cooling>  
<Heating>  
7
6
5
4
3
7
6
5
4
3
2
1
2
• Conditions  
• Conditions  
Indoor : DB 27°C/WB 19°C  
Indoor : DB 20°C  
Outdoor : DB 7°C/WB 6°C  
Air flow : High  
Outdoor : DB 35°C  
Air flow : High  
Pipe length : 5m  
230V  
1
0
Pipe length : 5m  
230V  
0
0
0
20  
40  
60  
80  
100  
20  
40  
60  
80  
100  
Compressor speed (rps)  
Compressor speed (rps)  
1-3. Capacity Variation Ratio According to Temperature  
<Cooling>  
<Heating>  
120  
110  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
105  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
Current Limited Start  
• Conditions  
• Conditions  
Indoor : DB27°C/WB19°C  
Indoor air flow : High  
Pipe length 5m  
Indoor : DB 20°C  
Indoor air flow : High  
Pipe length : 5m  
−10  
−9  
−8  
−7  
−6  
−5  
−4  
−3  
−2  
−1  
0 1 2 3 4 5 6 7 8 9 10  
32 33 34 35 36 37 38 39 40 41 42 43  
Outdoor temp. (°C)  
Outdoor temp. (°C)  
Capacity ratio : 100% = 3.5 kW  
*
– 4 –  
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FILE NO. SVM-03008  
2. REFRIGERANT R410A  
This air conditioner adopts the new refrigerant HFC  
(R410A) which does not damage the ozone layer.  
(5) After completion of installation work, check to  
make sure that there is no refrigeration gas  
leakage.  
The working pressure of the new refrigerant R410A is  
1.6 times higher than conventional refrigerant (R22).  
The refrigerating oil is also changed in accordance  
with change of refrigerant, so be careful that water,  
If the refrigerant gas leaks into the room, coming  
into contact with fire in the fan-driven heater,  
space heater, etc., a poisonous gas may occur.  
dust, and existing refrigerant or refrigerating oil are not (6) When an air conditioning system charged with a  
entered in the refrigerant cycle of the air conditioner  
using the new refrigerant during installation work or  
servicing time.  
large volume of refrigerant is installed in a small  
room, it is necessary to exercise care so that,  
even when refrigerant leaks, its concentration  
does not exceed the marginal level.  
If the refrigerant gas leakage occurs and its  
concentration exceeds the marginal level, an  
oxygen starvation accident may result.  
The next section describes the precautions for air  
conditioner using the new refrigerant. Conforming to  
contents of the next section together with the general  
cautions included in this manual, perform the correct  
and safe work.  
(7) Be sure to carry out installation or removal  
according to the installation manual.  
Improper installation may cause refrigeration  
trouble, water leakage, electric shock, fire, etc.  
2-1. Safety During Installation/Servicing  
As R410A’s pressure is about 1.6 times higher than  
that of R22, improper installation/servicing may cause  
a serious trouble. By using tools and materials exclu-  
sive for R410A, it is necessary to carry out installation/  
servicing safely while taking the following precautions  
into consideration.  
(8) Unauthorized modifications to the air conditioner  
may be dangerous. If a breakdown occurs please  
call a qualified air conditioner technician or  
electrician.  
Improper repair’s may result in water leakage,  
electric shock and fire, etc.  
(1) Never use refrigerant other than R410A in an air  
conditioner which is designed to operate with  
R410A.  
2-2. Refrigerant Piping Installation  
If other refrigerant than R410A is mixed, pressure 2-2-1. Piping materials and joints used  
in the refrigeration cycle becomes abnormally  
For the refrigerant piping installation, copper pipes and  
high, and it may cause personal injury, etc. by a  
joints are mainly used. Copper pipes and joints suit-  
rupture.  
able for the refrigerant must be chosen and installed.  
(2) Confirm the used refrigerant name, and use tools  
and materials exclusive for the refrigerant R410A.  
The refrigerant name R410A is indicated on the  
visible place of the outdoor unit of the air condi-  
tioner using R410A as refrigerant. To prevent  
mischarging, the diameter of the service port  
differs from that of R22  
Furthermore, it is necessary to use clean copper pipes  
and joints whose interior surfaces are less affected by  
contaminants.  
(1) Copper Pipes  
It is necessary to use seamless copper pipes  
which are made of either copper or copper alloy  
and it is desirable that the amount of residual oil is  
less than 40 mg/10 m. Do not use copper pipes  
having a collapsed, deformed or discolored  
portion (especially on the interior surface).  
Otherwise, the expansion valve or capillary tube  
may become blocked with contaminants.  
As an air conditioner using R410A incurs pressure  
higher than when using R22, it is necessary to  
choose adequate materials.  
(3) If a refrigeration gas leakage occurs during instal-  
lation/servicing, be sure to ventilate fully.  
If the refrigerant gas comes into contact with fire,  
a poisonous gas may occur.  
(4) When installing or removing an air conditioner,  
do not allow air or moisture to remain in the  
refrigeration cycle. Otherwise, pressure in the  
refrigeration cycle may become abnormally high  
so that a rupture of personal injury may be  
caused.  
Thicknesses of copper pipes used with R410A are  
as shown in Table 2-2-1. Never use copper pipes  
thinner than 0.8 mm even when it is available on  
the market.  
– 5 –  
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FILE NO. SVM-03008  
Table 2-2-1 Thicknesses of annealed copper pipes  
Thickness (mm)  
Nominal diameter  
Outer diameter (mm)  
R410A  
0.80  
R22  
0.80  
0.80  
0.80  
1.00  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.80  
12.70  
15.88  
0.80  
1.00  
(2) Joints  
b) Socket Joints  
For copper pipes, flare joints or socket joints are  
used. Prior to use, be sure to remove all  
contaminants.  
Socket joints are such that they are brazed for  
connections, and used mainly for thick pipings  
whose diameter is larger than 20 mm.  
Thicknesses of socket joints are as shown in  
Table 2-2-2.  
a) Flare Joints  
Flare joints used to connect the copper pipes  
cannot be used for pipings whose outer  
diameter exceeds 20 mm. In such a case,  
socket joints can be used.  
Sizes of flare pipe ends, flare joint ends and  
flare nuts are as shown in Tables 2-2-3 to 2-2-6  
below.  
Table 2-2-2 Minimum thicknesses of socket joints  
Reference outer diameter of  
Minimum joint thickness  
(mm)  
Nominal diameter  
copper pipe jointed (mm)  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.50  
0.60  
0.70  
0.80  
12.70  
15.88  
2-2-2. Processing of piping materials  
d) Flare Processing  
Make certain that a clamp bar and copper pipe  
have been cleaned.  
By means of the clamp bar, perform the flare  
processing correctly.  
Use either a flare tool for R410A or  
conventional flare tool.  
Flare processing dimensions differ according to  
the type of flare tool. When using a  
conventional flare tool, be sure to secure  
“dimension A” by using a gauge for size  
adjustment.  
When performing the refrigerant piping installation,  
care should be taken to ensure that water or dust does  
not enter the pipe interior, that no other oil other than  
lubricating oils used in the installed air conditioner is  
used, and that refrigerant does not leak. When using  
lubricating oils in the piping processing, use such  
lubricating oils whose water content has been removed.  
When stored, be sure to seal the container with an  
airtight cap or any other cover.  
(1) Flare Processing Procedures and Precautions  
a) Cutting the Pipe  
∅D  
By means of a pipe cutter, slowly cut the pipe  
so that it is not deformed.  
A
b) Removing Burrs and Chips  
If the flared section has chips or burrs,  
refrigerant leakage may occur. Carefully  
remove all burrs and clean the cut surface  
before installation.  
c) Insertion of Flare Nut  
Fig. 2-2-1 Flare processing dimensions  
– 6 –  
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FILE NO. SVM-03008  
Table 2-2-3 Dimensions related to flare processing for R410A  
A (mm)  
Conventional flare tool  
Outer  
diameter  
(mm)  
Nominal  
diameter  
Thickness  
(mm)  
Flare tool for R410A  
clutch type  
Clutch type  
1.0 to 1.5  
1.0 to 1.5  
1.0 to 1.5  
1.0 to 1.5  
Wing nut type  
1.5 to 2.0  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.8  
0.8  
0.8  
1.0  
0 to 0.5  
0 to 0.5  
0 to 0.5  
0 to 0.5  
1.5 to 2.0  
12.70  
15.88  
2.0 to 2.5  
2.0 to 2.5  
Table 2-2-4 Dimensions related to flare processing for R22  
A (mm)  
Outer  
diameter  
(mm)  
Nominal  
diameter  
Thickness  
(mm)  
Conventional flare tool  
Flare tool for R410A  
clutch type  
Clutch type  
0.5 to 1.0  
0.5 to 1.0  
0.5 to 1.0  
0.5 to 1.0  
Wing nut type  
1.0 to 1.5  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.8  
0.8  
0.8  
1.0  
0 to 0.5  
0 to 0.5  
0 to 0.5  
0 to 0.5  
1.0 to 1.5  
12.70  
15.88  
1.0 to 2.0  
1.0 to 2.0  
Table 2-2-5 Flare and flare nut dimensions for R410A  
Outer  
diameter  
(mm)  
Flare nut  
width  
(mm)  
Dimension (mm)  
Thickness  
Nominal  
diameter  
(mm)  
A
B
C
D
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
0.8  
0.8  
0.8  
1.0  
9.1  
9.2  
6.5  
13  
20  
23  
25  
17  
22  
26  
29  
13.2  
16.6  
19.7  
13.5  
16.0  
19.0  
9.7  
12.70  
15.88  
12.9  
16.0  
Table 2-2-6 Flare and flare nut dimensions for R22  
Outer  
diameter  
(mm)  
Flare nut  
width  
(mm)  
Dimension (mm)  
Thickness  
Nominal  
diameter  
(mm)  
A
B
C
D
1/4  
3/8  
1/2  
5/8  
3/4  
6.35  
9.52  
0.8  
0.8  
0.8  
1.0  
1.0  
9.0  
9.2  
6.5  
13  
20  
20  
23  
34  
17  
22  
24  
27  
36  
13.0  
16.2  
19.7  
23.3  
13.5  
16.0  
19.0  
24.0  
9.7  
12.70  
15.88  
19.05  
12.9  
16.0  
19.2  
– 7 –  
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FILE NO. SVM-03008  
Fig. 2-2-2 Relations between flare nut and flare seal surface  
(2) Flare Connecting Procedures and Precautions  
a) Make sure that the flare and union portions do  
not have any scar or dust, etc.  
When it is strong, the flare nut may crack and  
may be made non-removable. When choosing  
the tightening torque, comply with values  
designated by manufacturers. Table 2-2-7  
shows reference values.  
b) Correctly align the processed flare surface with  
the union axis.  
Note:  
c) Tighten the flare with designated torque by  
means of a torque wrench. The tightening  
torque for R410A is the same as that for  
conventional R22. Incidentally, when the torque  
is weak, the gas leakage may occur.  
When applying oil to the flare surface, be sure to use  
oil designated by the manufacturer. If any other oil is  
used, the lubricating oils may deteriorate and cause  
the compressor to burn out.  
Table 2-2-7 Tightening torque of flare for R410A [Reference values]  
Tightening torque of torque  
wrenches available on the market  
N·m (kgf·m)  
Nominal  
diameter  
Outer diameter  
(mm)  
Tightening torque  
N·m (kgf·cm)  
1/4  
3/8  
1/2  
5/8  
6.35  
9.52  
14 to 18 (140 to 180)  
33 to 42 (330 to 420)  
50 to 62 (500 to 620)  
63 to 77 (630 to 770)  
16 (160), 18 (180)  
42 (420)  
12.70  
15.88  
55 (550)  
65 (650)  
– 8 –  
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FILE NO. SVM-03008  
2-3.Tools  
2-3-1. Required tools  
The service port diameter of packed valve of the outdoor unit in the air conditioner using R410A is changed to  
prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and  
opposite side dimension of flare nut (For ∅12.70 copper pipe) of the refrigerant piping are lengthened.  
The used refrigerating oil is changed, and mixing 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 conventional  
Whether  
Whether new equipment  
can be used with  
for R410A  
equipment can  
be used  
conventional refrigerant  
1
2
Flare tool  
Copper pipe gauge  
Pipe flaring  
Flaring by  
Yes  
*(Note 1)  
for adjusting projection conventional flare  
Yes  
*(Note 1)  
*(Note 1)  
margin  
tool  
3
4
Torque wrench  
(For ∅12.70)  
Connection of  
flare nut  
Yes  
Yes  
Evacuating,  
refrigerant charge,  
run check, etc.  
Gauge manifold  
Charge hose  
5
6
Vacuum pump adapter Vacuum evacuating  
Yes  
Yes  
Electronic balance for  
Refrigerant charge  
refrigerant charging  
7
8
9
!
Refrigerant cylinder  
Leakage detector  
Charging cylinder  
Refrigerant charge  
Gas leakage check  
Refrigerant charge  
Yes  
Yes  
(Note 2)  
(Note 1) 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.  
(Note 2) Charging cylinder for R410A is being currently developed.  
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  
(4) Reamer  
(5) Pipe bender  
(9) Hole core drill (∅65)  
(10) Hexagon wrench  
(Opposite side 5 mm)  
(11) Tape measure  
(12) Metal saw  
Use vacuum pump by  
attaching vacuum pump adapter. (6) Level vial  
(2) Torque wrench (For ∅6.35)  
(3) Pipe cutter  
(7) Screwdriver (+, –)  
(8) Spanner of Monkey wrench  
Also prepare the following equipments for other installation method and run check.  
(1) Clamp meter  
(2) Thermometer  
(3) Insulation resistance tester  
(4) Electroscope  
– 9 –  
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FILE NO. SVM-03008  
2-4. Recharging of Refrigerant  
When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the  
following steps.  
Recover the refrigerant, and check no refrigerant  
remains in the equipment.  
When the compound gauge’s pointer has indi-  
cated -0.1 Mpa (-76 cmHg), place the handle Low  
in the fully closed position, and turn off the  
Connect the charge hose to packed valve service  
port at the outdoor unit’s gas side.  
vacuum pump’s power switch.  
Keep the status as it is for 1 to 2 minutes, and  
ensure that the compound gauge’s pointer does  
not return.  
Connect the charge hose to the vacuum pump  
adapter.  
Open fully both packed valves at liquid and gas  
Set the refrigerant cylinder to the electronic  
sides.  
balance, connect the connecting hose to the  
cylinder and the connecting port of the electronic  
balance, and charge liquid refrigerant.  
Place the handle of the gauge manifold Low in  
the fully opened position, and turn on the vacuum  
pump’s power switch. Then, evacuating the  
refrigerant in the cycle.  
(For refrigerant charging, see the figure below.)  
1 Never charge refrigerant exceeding the specified amount.  
2 If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.  
3 Do not carry out additional charging.  
When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the  
refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the  
specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high  
pressure, and may cause a rupture or personal injury.  
(Liquid side)  
(INDOOR unit)  
(OUTDOOR unit)  
Opened  
Closed  
(Gas side)  
Refrigerant cylinder  
(With siphon pipe)  
Check valve  
Open/Close valve  
for charging  
Service port  
Electronic balance for refrigerant charging  
Fig. 2-4-1 Configuration of refrigerant charging  
– 10 –  
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FILE NO. SVM-03008  
1 Be sure to make setting so that liquid can be charged.  
2 When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.  
It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.  
Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the  
cylinder upside down if cylinder is not equipped with siphon.  
[Cylinder with siphon]  
[Cylinder without siphon]  
Gauge manifold  
Gauge manifold  
OUTDOOR unit  
OUTDOOR unit  
Refrigerant  
cylinder  
Refrigerant  
cylinder  
Electronic  
balance  
Electronic  
balance  
Siphon  
R410A refrigerant is HFC mixed refrigerant.  
Therefore, if it is charged with gas, the composition  
of the charged refrigerant changes and the  
characteristics of the equipment varies.  
Fig. 2-4-2  
2-5. Brazing of Pipes  
1 Phosphor bronze brazing filler tends to react  
with sulfur and produce a fragile compound  
water solution, which may cause a gas leakage.  
Therefore, use any other type of brazing filler at  
a hot spring resort, etc., and coat the surface  
with a paint.  
2-5-1. Materials for brazing  
(1) Silver brazing filler  
Silver brazing filler is an alloy mainly composed of  
silver and copper. It is used to join iron, copper or  
copper alloy, and is relatively expensive though it  
excels in solderability.  
2 When performing brazing again at time of  
servicing, use the same type of brazing filler.  
(2) Phosphor bronze brazing filler  
Phosphor bronze brazing filler is generally used to  
join copper or copper alloy.  
2-5-2. Flux  
(1) Reason why flux is necessary  
(3) Low temperature brazing filler  
Low temperature brazing filler is generally called  
solder, and is an alloy of tin and lead. Since it is  
weak in adhesive strength, do not use it for  
refrigerant pipes.  
•
By removing the oxide film and any foreign  
matter on the metal surface, it assists the flow  
of brazing filler.  
•
•
In the brazing process, it prevents the metal  
surface from being oxidized.  
By reducing the brazing filler’s surface tension,  
the brazing filler adheres better to the treated  
metal.  
– 11 –  
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FILE NO. SVM-03008  
(2) Characteristics required for flux  
2-5-3. Brazing  
•
Activated temperature of flux coincides with the  
brazing temperature.  
Due to a wide effective temperature range, flux  
is hard to carbonize.  
It is easy to remove slag after brazing.  
The corrosive action to the treated metal and  
brazing filler is minimum.  
As brazing work requires sophisticated techniques,  
experiences based upon a theoretical knowledge, it  
must be performed by a person qualified.  
In order to prevent the oxide film from occurring in the  
pipe interior during brazing, it is effective to proceed  
with brazing while letting dry Nitrogen gas (N2) flow.  
•
•
•
•
It excels in coating performance and is  
harmless to the human body.  
Never use gas other than Nitrogen gas.  
(1) Brazing method to prevent oxidation  
1 Attach a reducing valve and a flow-meter to the  
Nitrogen gas cylinder.  
As the flux works in a complicated manner as  
described above, it is necessary to select an  
adequate type of flux according to the type and  
shape of treated metal, type of brazing filler and  
brazing method, etc.  
2 Use a copper pipe to direct the piping material,  
and attach a flow-meter to the cylinder.  
3 Apply a seal into the clearance between the  
piping material and inserted copper pipe for  
Nitrogen in order to prevent backflow of the  
Nitrogen gas.  
(3) Types of flux  
•
Noncorrosive flux  
Generally, it is a compound of borax and boric  
acid.  
4 When the Nitrogen gas is flowing, be sure to  
keep the piping end open.  
It is effective in case where the brazing  
temperature is higher than 800°C.  
5 Adjust the flow rate of Nitrogen gas so that it is  
lower than 0.05 m3/Hr or 0.02 Mpa (0.2 kgf/  
cm2) by means of the reducing valve.  
6 After performing the steps above, keep the  
Nitrogen gas flowing until the pipe cools down  
to a certain extent (temperature at which pipes  
are touchable with hands).  
•
Activated flux  
Most of fluxes generally used for silver brazing  
are this type.  
It features an increased oxide film removing  
capability due to the addition of compounds  
such as potassium fluoride, potassium chloride  
and sodium fluoride to the borax-boric acid  
compound.  
7 Remove the flux completely after brazing.  
(4) Piping materials for brazing and used brazing  
filler/flux  
M
Flow meter  
Piping  
material  
Used brazing  
filler  
Used  
flux  
Stop valve  
Copper - Copper Phosphor copper  
Do not use  
Paste flux  
Vapor flux  
Nitrogen gas  
cylinder  
Copper - Iron  
Iron - Iron  
Silver  
Silver  
From Nitrogen cylinder  
1 Do not enter flux into the refrigeration cycle.  
2 When chlorine contained in the flux remains  
within the pipe, the lubricating oil deteriorates.  
Therefore, use a flux which does not contain  
chlorine.  
3 When adding water to the flux, use water which  
does not contain chlorine (e.g. distilled water or  
ion-exchange water).  
Pipe  
Nitrogen  
gas  
Rubber plug  
Fig. 2-5-1 Prevention of oxidation during brazing  
4 Remove the flux after brazing.  
– 12 –  
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FILE NO. SVM-03008  
3. CONSTRUCTION VIEWS  
3-1. Indoor Unit  
Front panel  
Back body  
Air filter  
Air inlet  
Heat exchanger  
208  
790  
48  
Air outlet  
Knock out system  
Knock out system  
64 53  
120  
590  
Hanger  
80  
Connecting pipe (0.43m)  
(Flare ∅6.35)  
Connecting pipe (0.33m)  
Drain hose (0.54m)  
Hanger  
320  
Flare ∅9.52  
620  
For stud bolt  
(∅8~∅10)  
235  
215  
235  
215  
For stud bolt (∅6)  
Minimum  
distance  
to ceiling  
Hanger  
Minimum  
distance  
to ceiling  
Minimum  
distance  
to ceiling  
170 or more  
170 or more  
Hanger  
150  
57  
18  
Hanger  
Wireless remote control  
90  
150  
160  
160  
90  
Installation plate outline  
Center line  
– 13 –  
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FILE NO. SVM-03008  
3-2. Outdoor Unit  
A
32.5  
A Detail drawing (Back Leg)  
115  
125  
B Detail drawing (Front Leg)  
600  
52  
36  
∅6 Hole  
R15  
∅6 Hole  
∅11 x 14 Hole  
36  
52  
R15  
R5.5  
B
∅30 Drain outlet  
2-∅11 x 14 Hole  
(For ∅8-∅10 anchor bolt)  
FAN GUARD  
∅436  
COVER PV  
Z
270  
310  
330  
600  
780  
90  
62  
Electrical  
part cover  
Liquid side  
(Flare ∅6.35)  
Gas side  
(Flare ∅9.52)  
Z View  
Service port  
Installation dimension  
600  
Air inlet  
600 or more  
600 or more  
Air outlet  
600 or more  
100 or more  
4 x ∅11 x 14 Long holes (For ∅8 − ∅10 anchorbolt)  
– 14 –  
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FILE NO. SVM-03008  
4. WIRING DIAGRAM  
4-1. Indoor Unit  
Table 4-1-1 Simple Check for Failure Diagnosis  
Diagnosis Result  
Check Item  
Check to see if the OPERATION indicator goes on and off when the main  
switch or breaker is turned on.  
(Check the primary and secondary voltage of the transformer.)  
OPERATION  
1
INDICATOR  
Check the power supply voltage between 1 and 2. (Refer to the name plate.)  
(Check the primary and secondary voltage of the transformer.)  
Check the fluctuating voltage between 2 and 3. (DC15 to 60 V)  
TERMINAL BLOCK  
2
Check to see if the fuse blows out.  
(Check the R04 of the varistor.)  
FUSE 3.15A  
DC5V  
3
4
5
6
Check the voltage at the No. 4 pin on CN13 connector of the infrared receiver.  
(Check the transformer and the power supply circuit of the rated voltage.)  
Check the voltage at the white lead of the louver motor.  
(Check the transformer and the power supply circuit of the rated voltage.)  
DC12V  
DC325V  
(DC310 to 340V)  
Check the voltage at the No. 1 pin on CN10 connector.  
(Check the DB01, R05 and C03.)  
Refer to the service data for the detailed failure diagnosis.  
– 15 –  
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FILE NO. SVM-03008  
4-2.Outdoor Unit  
P.C. BOARD  
(MCC-813)  
– 16 –  
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FILE NO. SVM-03008  
5. SPECIFICATION OF ELECTRICAL PARTS  
5-1. Indoor Unit  
No.  
1
Parts name  
Type  
ICF-340-30-2  
———  
Specifications  
DC 340 V, 30 W  
Fan motor (for indoor)  
Thermo. sensor (TA-sensor)  
DC-DC transformer (T01)  
Microcomputer  
2
10 kΩ at 25°C  
3
SWT-70  
DC 390 V, Secondary DC 15 V, 12 V, 7 V  
4
µPD780024AGK  
5
Heat exchanger sensor  
(TC-sensor)  
———  
10 kΩ at 25°C  
6
7
Line filter (L01  
SS11V-06270  
D3SBA60  
27mH, AC 0.6A  
4A, 600 V  
Diode (DB01)  
8
Capacitor (C03)  
Fuse (F01)  
KMH450VNSN120M25C 120µF, 450 V  
9
FCU250V, 3.15A  
STR-L472  
T3.15A, 250 V  
10  
11  
12  
Power supply IC (IC01)  
Varistor (R21, R109)  
Resistor (R01)  
15G561K  
560 V  
RF-5TK4R7  
4.7Ω, 5 W  
Output (Rated) 1 W,16 poles, 1 phase,  
DC 12 V  
13  
Louver motor  
MP24GA  
5-2. Outdoor Unit  
No.  
Parts name  
Model name  
ADR2516-0R6TB  
ADR2520-R15TB  
Rating  
20A, 150µH  
1
SC coil  
L01  
L03  
(Noise filter)  
15A, 0.6mH  
Primary side DC280V, Secondary  
side 7.5 V x 1, 13 V x 1, 26.5V x 3,  
16 V x 1, 15 V x 1  
2
DC-DC transformer  
SWT-43  
3
4
5
Reactor  
CH-57-Z-T  
L=10mH, 16A x 2  
DC140 V, 43 W  
Outside fan motor  
ICF-140-43-1  
Suction temp. sensor  
(TS sensor)  
(Inverter attached)  
(Inverter attached)  
(Inverter attached)  
10 kΩ (25°C)  
62 kΩ (20°C)  
10 kΩ (25°C)  
Discharge temp. sensor  
(TD sensor)  
6
7
Outside air temp. sensor  
(TO sensor)  
Heat exchanger temp.  
sensor (TE sensor)  
8
9
(Inverter attached)  
———  
10 kΩ (25°C)  
Terminal block (6P)  
20A, AC 250 V  
For protection of switching power source  
3.15A, AC 250 V  
10  
Fuse  
For protection of inverter input overcurrent 25A, AC 250 V  
11  
12  
13  
14  
Electrolytic capacitor  
Transistor module  
Compressor  
LLQ2G501KHUATF, 400LISN500K35F  
500µF, DC 400 V x 3 pieces  
6MBI25GS-060-01 or 6MBI25GS-060-01A 25A, 600 V  
DA91A1F-45F  
PW-2AL  
3-phases 4-poles 750 W  
Compressor thermo.  
OFF: 125 ± 4°C, ON: 90 ± 5°C  
Diode: 25A, 600 V,  
IGBT: 40 A, 600V  
15  
Converter module  
MP7003  
– 17 –  
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FILE NO. SVM-03008  
6. REFRIGERANT CYCLE DIAGRAM  
6-1. Refrigerant Cycle Diagram  
T1 Temp. measurement  
INDOOR UNIT  
Indoor heat  
exchanger  
Cross flow fan  
P
Pressure measurement  
Max. : 15 m  
Deoxidized copper pipe  
Outer dia. : 6.35 mm  
Thickness : 0.8 mm  
Gauge attaching port  
Vacuum pump connecting port  
Sectional shape  
of heat insulator  
Deoxidized copper pipe  
Outer dia. : 9.52 mm  
Thickness : 0.8 mm  
Strainer  
Muffler  
4-way valve  
(CHV-0213)  
Pulse modulating  
valve at liquid side  
(SEV16RC3)  
Muffler  
TD  
Compressor  
DA91A1F-45F  
TS  
TO  
Outdoor heat  
exchanger  
Split capillary  
∅1.5 x 200  
s
∅1.5 x 200  
s
Temp. measurement  
T2  
TE  
Refrigerant amount : 0.9 kg  
Propeller fan  
OUTDOOR UNIT  
Gas leak check position  
Refrigerant flow (Cooling)  
Refrigerant flow (Heating)  
NOTE :  
Note :  
•
The maximum length of the pipe for this air conditioner is 15 m. The additional charging of refrigerant is  
unnecessary because this air conditioner is designed with charge-less specification.  
– 18 –  
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FILE NO. SVM-03008  
6-2. Operation Data  
<Cooling>  
Temperature  
condition (°C)  
Heat exchanger  
pipe temp.  
Standard  
pressure  
P (MPa)  
Indoor  
fan  
mode  
Outdoor Compressor  
Model  
name  
fan  
revolution  
(rps)  
mode  
Indoor  
Outdoor  
T1 (°C)  
T2 (°C)  
27/19  
35/–  
13UKV-E2 0.8 to 1.0  
9 to 11  
49 to 45  
High  
High  
77  
<Heating>  
Temperature  
condition (°C)  
Heat exchanger  
pipe temp.  
Standard  
Model  
Indoor  
fan  
mode  
Outdoor Compressor  
pressure  
name  
fan  
mode  
revolution  
(rps)  
P (MPa)  
Indoor Outdoor  
20/– 7/6  
T1 (°C)  
T2 (°C)  
13UKV-E2 2.5 to 2.7 42 to 44  
0 to 3  
High  
High  
83  
Note :  
(1) Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent.  
(Thermistor themometer)  
(2) Connecting piping condition : 5m  
– 19 –  
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FILE NO. SVM-03008  
7. CONTROL BLOCK DIAGRAM  
7-1. Indoor Unit  
Indoor Unit Control Panel  
M.C.U  
Functions  
Operation  
Display  
Heat Exchanger Sensor  
•
Louver Control  
Timer  
Display  
Temperature Sensor  
•
3-minute Delay at Restart for Compressor  
Filter  
Sign Display  
•
Motor Revolution Control  
Infrared Rays Signal Receiver  
PRE DEF.  
Sign Display  
Initiallizing Circuit  
Infrared  
•
•
Processing  
(Temperature Processing)  
Rays  
Indoor  
Fan Motor  
Clock Frequency  
Timer  
36.7KHz  
Oscillator Circuit  
Louver  
Motor  
•
Serial Signal Communication  
Power Supply  
Louver ON/OFF Signal  
Circuit  
Remote  
Control  
Louver Motor  
Louver Driver  
Noise Filter  
Serial Signal Transmitter/Receiver  
Serial Signal Communication  
From Outdoor Unit  
REMOTE CONTROL  
Infrared Rays  
Remote Control  
Operation (START/STOP)  
Operation Mode Selection  
AUTO, COOL, DRY, HEAT, FAN ONLY  
Temperature Setting  
Fan Speed Selection  
ON TIMER Setting  
OFF TIMER Setting  
Louver Auto Swing  
Louver Direction Setting  
ECO  
Hi power  
Filter Reset  
– 20 –  
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FILE NO. SVM-03008  
7-2. Outdoor Unit (Inverter Assembly)  
– 21 –  
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FILE NO. SVM-03008  
8. OPERATION DESCRIPTION  
(1) Role of indoor unit controller  
8-1. Outlined of Air Conditioner Control  
The indoor unit controller judges the operation  
commands from the remote controller and  
assumes the following functions.  
This air conditioner is a capacity-variable type air  
conditioner, which uses DC motor for the indoor fan  
motor and the outdoor fan motor. And the capacity  
proportional control compressor which can change the  
motor speed in the range from 13 to 110 rps is  
mounted. The DC motor drive circuit is mounted to the  
indoor unit. The compressor and the inverter to control  
fan motor are mounted to the outdoor unit.  
•
Judgment of suction air temperature of the  
indoor heat exchanger by using the indoor  
temp. sensor (TA sensor)  
•
Temperature setting of the indoor heat  
exchanger by using heat exchanger sensor  
(TC sensor) (Prevent-freezing control)  
Louver motor control  
The entire air conditioner is mainly controlled by the  
indoor unit controller.  
•
•
•
•
Indoor fan motor operation control  
The indoor unit controller drives the indoor fan motor  
based upon command sent from the remote control,  
and transfers the operation command to the outdoor  
unit controller.  
LED (Light Emitting Diode) display control  
Transferring of operation command signal  
(Serial signal) to the outdoor unit  
•
Reception of information of operation status  
(Serial signal including outside temp. data) to  
the outdoor unit and judgment/display of error  
The outdoor unit controller receives operation  
command from the indoor unit side, and controls the  
outdoor fan and the pulse modulating valve. (P.M.V)  
Besides, detecting revolution position of the  
compressor motor, the outdoor unit controller controls  
speed of the compressor motor by controlling output  
voltage of the inverter and switching timing of the  
supply power (current transfer timing) so that motors  
drive according to the operation command. And then,  
the outdoor unit controller transfers reversely the  
operating status information of the outdoor unit to  
control the indoor unit controller.  
(2) Role of outdoor unit controller  
Receiving the operation command signal (Serial  
signal) from the indoor controller, the outdoor unit  
performs its role.  
Operations followed  
to judgment of serial  
signal from indoor  
side.  
•
•
Compressor operation  
control  
Operation control of  
outdoor fan motor  
P.M.V. control  
•
•
Detection of inverter input current and current  
release operation  
As the compressor adopts four-pole brushless  
DC motor, the frequency of the supply power  
from inverter to compressor is two-times  
cycles of the actual number of revolution.  
•
Over-current detection and prevention  
operation to IGBT module (Compressor stop  
function)  
•
Compressor and outdoor fan stop function  
when serial signal is off (when the serial signal  
does not reach the board assembly of outdoor  
control by trouble of the signal system).  
Transferring of operation information (Serial  
signal) from outdoor unit to indoor unit  
Detection of outdoor temperature and  
operation revolution control  
•
•
•
Defrost control in heating operation (Temp.  
measurement by outdoor heat exchanger and  
control for 4-way valve and outdoor fan)  
– 22 –  
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FILE NO. SVM-03008  
(3) Contents of operation command signal (Serial  
signal) from indoor unit controller to outdoor unit  
controller  
8-1-1. Capacity control  
The cooling and heating capacity is varied by changing  
compressor motor speed. The inverter changes  
compressor motor speed by changing  
AC 220-240 V power to DC once, and controls capac-  
ity by changing supply power status to the compressor  
with transistor module (includes 6 transistors). The  
outline of the control is as follows:  
The following three types of signals are sent from  
the indoor unit controller.  
•
•
Operation mode set on the remote control  
Compressor revolution command signal  
defined by indoor temperature and set tem-  
perature (Correction along with variation of  
room  
The revolution position and revolution speed of the  
motor are detected by detecting winding electromotive  
force of the compressor motor under operation, and  
the revolution speed is changed so that the motor  
drives based upon revolution speed of the operation  
command by changing timing (current transfer timing)  
to exchange inverter output voltage and supply power  
winding.  
temperature and correction of indoor heat  
exchanger temperature are added.)  
For these two types of signals ([Operation  
mode] and [Compressor revolution]), the  
outdoor unit controller monitors the input  
current to the inverter, and performs the  
followed operation within the range that current  
does not exceed the allowable value.  
Temperature of indoor heat exchanger by  
indoor heat exchanger sensor  
•
•
Detection of the revolution position for controlling is  
performed 12 times per 1 revolution of compressor.  
The range of supply power frequency to the  
compressor differs according to the operation status  
(COOL, HEAT, DRY).  
(Minimum revolution control)  
(4) Contents of operation command signal (Serial  
signal) from outdoor unit controller to indoor unit  
controller  
Table 8-1-1 Compressor revolution range  
The following signals are sent from the outdoor  
unit controller.  
Operation  
mode  
Model  
name  
Compressor  
revolution (rps)  
•
•
•
•
The current operation mode  
The current compressor revolution  
Outdoor temperature  
COOL  
HEAT  
13 to 88  
13UKV-E2  
16 to 110  
Existence of protective circuit operation  
For transferring of these signals, the indoor unit  
controller monitors the contents of signals, and  
judges existence of trouble occurrence.  
Contents of judgment are described below.  
Whether distinction of the current operation  
status meets to the operation command signal  
Whether protective circuit operates  
8-1-2. Current release control  
The outdoor main circuit control section (Inverter  
assembly) detects the input current to the outdoor unit.  
If the current value with compressor motor speed  
instructed from indoor side exceeds the specified  
value, the outdoor main circuit control section controls  
compressor motor speed by reducing motor speed so  
that value becomes closest to the command within the  
limited value.  
•
•
When no signal is received from the outdoor  
unit controller, it is assumed as a trouble.  
8-1-3. Power factor improvement control  
Power factor improvement control is performed mainly  
aiming to reduce the current on much power consump-  
tion of cooling/heating operation. Controlling starts  
from the time when input power has reached at a  
certain point. To be concrete, IGBT of the power factor  
improvement circuit is used, and the power factor is  
improved by keeping IGBT on for an arbitrary period to  
widen electro-angle of the input current.  
– 23 –  
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FILE NO. SVM-03008  
8-1-4. Prevent-freezing control  
8-1.7. Indoor fan control (DC fan motor)  
The indoor heat exchanger sensor detects refrigerant  
vapor temperature in COOL/DRY operation. If the  
temperature is below the specified value, compressor  
motor speed is reduced so that operation is performed  
in temperature below the specified value to prevent-  
freezing of indoor heat exchanger.  
(1) The indoor fan is operated by the stepless speed  
change DC motor.  
(2) For air flow level, speed of the indoor fan motor is  
controlled in five steps (LOW, LOW+, MED, MED+  
and HIGH). If AUTO mode is selected, the fan  
motor speed is automatically controlled by the  
difference between the preset temperature and  
the room temperature.  
8-1-5. P.M.V. (Pulse Modulating Valve)  
Using P.M.V., refrigerant flow of refrigeration cycle is  
varied for the optimum temperature.  
LOW+MED  
LOW+ =  
2
After the power has been turned on, when a serial  
operation signal is received from indoor at the first  
time, or when PMV alarm is detected and the equip-  
ment is reactivated, move the valve once until it hits on  
the stopper for positioning of the valve. In this case,  
ticktack sound may be heard.  
MED+HIGH  
MED+ =  
2
Table 8-1-2  
RAS-13UKV-E2  
Operation  
mode  
Fan  
mode  
Motor speed Air flow rate  
8-1-6. Louver control  
(rpm)  
1210  
1010  
810  
(m3/h)  
530  
420  
330  
320  
620  
470  
380  
(1) Vertical air flow louvers  
H
M
L
Positions of vertical air flow louvers are  
automatically controlled according to the operation  
status (AUTO (A), COOL ( ), DRY ( ), HEAT( )  
and FAN ONLY ( ). Besides, positions of vertical  
air flow louvers can be arbitrarily set by pushing  
the [FIX] button.  
COOL  
DRY  
—
H
M
L
780  
1290  
1110  
930  
(2) Swing  
HEAT  
If the [SWING] button is pressed during running  
operation, vertical air flow louvers start swinging.  
When the [FIX] button is pushed, swinging stops.  
– 24 –  
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FILE NO. SVM-03008  
8-1-8. Outdoor fan control (DC fan motor)  
Although the outdoor fan motor drives the outdoor fan by non-step variable system of the revolution speed, the  
revolution speed is restricted to three steps on the convenience of controlling. If a strong wind is lashing outside  
of the room, the operation may be continued as the outdoor fan stops in order to protect the outdoor fan motor.  
If a fan lock occurred due to entering of foreign matter, the air conditioner stops and an alarm is displayed.  
<COOL, DRY>  
Table 8-1-3  
Model name  
RAS-13UAV-E2  
Compressor revolution (rps)  
To 13.8  
390  
To 34.7  
840  
From 35.3  
840  
TO ≥ 38°C  
Outdoor temp. sensor TO  
ECONO. operation  
TO < 38°C  
TO < 15°C  
TO ≥ 38°C  
TO < 38°C  
TO < 15°C  
390  
700  
840  
390  
390  
390  
700  
840  
700  
390  
390  
TO is abnormal  
700  
700  
840  
<HEAT>  
Table 8-1-4  
Model name  
Compressor revolution (rps)  
RAS-13UAV-E2  
To 16.8  
390  
To 57.4  
650  
From 58.0  
840  
TO ≥ 5°C  
Outdoor temp. sensor TO  
TO < 5°C  
TO ≥ 5°C  
TO < 5°C  
650  
650  
840  
390  
390  
650  
ECONO. operation  
TO is abnormal  
390  
650  
650  
390  
650  
840  
– 25 –  
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FILE NO. SVM-03008  
(1) Cooling capacity control  
8-2. Description of Operation Circuit  
•
The cooling capacity and room temperature  
are controller by changing the compressor  
motor speed according to both the difference  
between the temperature detected by the room  
temperature sensor and the temperature set by  
•
Turning [ON] the breaker flashes the operation  
lamp. (1Hz)  
This is the display of power-ON (or notification of  
power failure).  
•
When pushing [START/STOP] button of the  
remote control, receive sound is issued from the  
main unit, and the next operations are performed  
together with opening the vertical air flow louvers.  
TEMP  
button and also any change in room  
temperature.  
•
•
When compressor has been activated or  
reactivated, it operates with Max.41 rps for 2  
minutes, with Max.91 rps from 2 minutes to 3  
minutes, and with Max.88 rps after 3 minutes  
passed.  
When room temperature is lower than set  
temperature, indoor fan motor is operated at  
fan speed L as shown in Fig. 8-2-1 while the  
outdoor unit stops.  
8-2-1. Cooling operation  
(The Remote Control MODE Button is Set to  
the COOL Position)  
•
Once the setting is made, the operation mode is  
memorized in the microcomputer so that the same  
operation can be effected thereafter simply by  
pushing [START/STOP] button.  
(2) Prevent-freezing control  
•
•
A cooling operation signal is transmitted to  
outdoor unit.  
The outdoor unit controls the outdoor fan relay  
R01, R02 and R03, and the compressor motor  
speed according to the operation command signal  
sent from the indoor unit.  
If temperature of indoor heat exchanger detected  
by the indoor heat exchanger sensor is 5°C lower,  
compressor motor speed is gradually lowered to  
prevent freezing of the indoor heat exchanger. If  
temperature is 7°C or higher, return the operation  
to the above item (1).  
•
When [FAN] button is set to AUTO, the indoor fan  
motor operates as shown in Fig. 8-2-1. When  
(3) Current release control  
[FAN] button is set to LOW , LOW+  
,
The input current of compressor and outdoor fan  
motor (Precisely inverter main circuit control  
section) which occupy most of air conditioner input  
is detected by the outdoor current sensor, and  
compressor motor speed is gradually lowered so  
that current value does not exceed 9.0A if current  
value exceeds 9.0A. When the current value  
lowers to 8.5A, return the operation to the above  
item (1).  
MED  
, MED+  
, HIGH  
, the  
motor operates with a constant air flow.  
°C  
+3  
M+  
*1  
*1  
*1  
L
+2.5  
+2  
+1.5  
+1  
Comp. motor  
speed down  
9.0  
+0.5  
0
Set  
temp.  
Comp. motor  
speed keep  
In normal  
operation  
8.5  
−0.5  
Normal control  
NOTE :  
*1: Calculated from difference in motor speed of M+  
and L, and controlled.  
Fig. 8-2-2  
Fig. 8-2-1 Setting of air flow [Fan AUTO]  
– 26 –  
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FILE NO. SVM-03008  
(4) Limit for maximum compressor motor speed  
by indoor fan speed  
6) Control 6 (F zone) : Operation stop zone  
If TD detect value exceeds 117°C during  
operation, stop the operation immediately.  
Then, restart the operation when TD detect  
value becomes 105°C or lower.  
When outdoor temperature sensor detected 32°C  
or lower, and indoor heat exchanger sensor  
detected 17°C or lower, the maximum compressor  
motor speed is limited by the indoor fan speed.  
For example, the compressor motor speed is  
limited as described in the table below.  
TD  
(°C)  
Zone  
F
E
D
Operation stop zone  
117  
112  
108  
Normal down zone  
of motor speed  
Table 8-2-1  
Release of  
motor speed  
Slow down of  
motor speed  
RAS-13UKV-E2  
Air flow rate  
(rps)  
HIGH  
M+  
77  
Keep zone :  
C
B
Motor speed is not changed.  
105  
98  
65  
MED.  
L–, L  
53  
Slow-up zone of motor speed  
30  
A
Normal operation zone  
UL, SUL  
30  
rps : round per second  
Fig. 8-2-3 Compressor motor speed control  
(5) Louver control  
The vertical air flow louvers are automatically set  
to horizontal or cool memory position.  
(7) ECO operation control  
When the ECO button of the remote control is  
pushed, quiet and mild operation is performed by  
restraining air flow and operating motor speed.  
When temperature of indoor heat exchanger  
becomes 5°C or lower by the prevent-freezing  
control and the compressor is turned off, the  
vertical air flow louvers close once and then return  
to the position of previous time.  
1) Indoor air flow is controlled between SUL and  
L.  
2) The set temperature increases 0.5°C per 1  
hour up to +2°C starting from the set  
temperature when ECO mode has been  
received.  
(6) Discharge temperature control  
(Common control to cooling and heating)  
The discharge temperature of refrigerant gas from  
the compressor is detected by the discharge  
temperature sensor, and controls operating  
compressor motor speed.  
TA [°C]  
rps  
40  
35  
31  
27  
22  
18  
13  
FAN  
L
1) Control 1 (A zone) : Normal operation zone  
When TD detect value is 98°C or lower, the  
operation is performed with operating motor  
speed instructed by the serial signal.  
2) Control 2 (B zone) : Slow-up zone of motor  
speed  
When TD detect value is 98°C or higher,  
operating motor speed is slowly up.  
3) Control 3 (C zone) : Keep zone  
When TD detect value is 105°C or higher,  
operating motor speed is not changed if raising  
operation speed.  
+4.0  
+3.5  
+3.0  
+2.5  
+2.0  
+1.5  
+1.0  
+0.5  
Tsc  
L−  
UL  
−0.5  
−1.0  
SUL  
4) Control 4 (D zone) : Slow down zone of motor  
speed  
−2.0  
OFF  
When TD detect value is 108°C or higher,  
operating motor speed is slowly down.  
5) Control 5 (E zone) : Normal down of motor  
speed  
Fig. 8-2-4  
When TD detect value is 112°C or higher,  
operating motor speed is down.  
– 27 –  
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FILE NO. SVM-03008  
8-2-2. DRY operation  
(The Remote Control MODE Button is Set to  
[Basic control]  
the DRY Position)  
LOW  
Set  
temp.  
0
−0.5  
−1  
•
Once the setting is made, the operation mode is  
memorized in the microcomputer so that the same  
operation can be effected thereafter simply by  
pushing [START/STOP] button.  
1
*
−1.5  
−2  
2
*
•
•
Dry operation signal is transmitted to outdoor unit.  
The Cooling operation giving priority to  
dehumidifying, which restrains the indoor fan speed  
and compressor motor speed, is performed.  
The indoor fan motor operates as shown in  
Fig. 8-2-5. (Fan speed is AUTO only.)  
The outdoor fan motor operates as described in  
Table 8-1-3, and the compressor motor speed  
according to the operation command signal sent  
from the indoor unit.  
M+  
−5.0  
−5.5  
•
•
HIGH  
[FAN AUTO]  
*1,*2 : Approximate revolution speed of M+ and L to  
linear accordingly to temperature.  
Fig. 8-2-6 Setting of air flow  
+2.5  
[Cold draft preventing control]  
+2.0  
+1.5  
+1.0  
+0.5  
0
L−  
The upper limit of fan revolution speed is shown below.  
*1  
HIGH  
44  
43  
33  
32  
SUL  
Approximate  
revolution speed  
of HIGH and SUL  
linear by Tc.  
31  
30  
20  
19  
Set  
temp.  
3
*
SUL  
2
*
A
−0.5  
A + 4  
( NOTE : 1)  
SUL  
Stop  
*
A − 8 A − 8  
NOTE :  
Starting  
FAN  
*1 : Middle motor speed between L– and SUL  
of FAN  
AUTO  
Manual  
Fig. 8-2-5 Setting of air flow  
Fig. 8-2-7 Cold draft preventing control  
NOTES :  
*1 : Stops for 2 minutes after thermostat-OFF.  
*2 : 24°C when the set temp. is 24°C or more  
Set temp. when the set temp. is below 24°C  
*3 : SUL : Super ultra low  
8-2-3. Heating operation  
Transferring of heat operation signal from indoor unit to  
outdoor unit starts.  
The indoor fan motor operates by the room  
temperature when selecting “AUTO” of “FAN” as shown  
in Fig. 8-2-6, and operates with a set air flow when  
selecting “LOW ” to “HIGH  
”.  
However, to prevent cold draft, revolution speed of the  
fan is restricted by indoor heat exchanger when air  
flow is AUTO (Fig. 8-2-7) and starting of FAN Manual.  
– 28 –  
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FILE NO. SVM-03008  
[In starting and in stability]  
In starting  
TO  
In stability  
9.8A  
10.3A  
10.8A  
16.0  
15.5  
11.0  
10.5  
• Until 12 minutes  
passed after  
operation start  
• When 12 to 25  
• When 12 to 25  
minutes passed  
after operation  
start and room  
temp. is higher  
than (set temp.  
–3°C)  
minutes passed  
FAN  
after operation  
AUTO  
start and room  
Fig. 8-2-8  
temp. is 3°C or  
lower than set  
temp.  
• When 25 minutes  
or more passed  
after operation  
start  
(4) Defrost control  
1) Detection of frost  
In heating operation, time duration while the  
compressor operates is counted, and defrost  
operation starts by any condition described  
below.  
FAN  
Manual  
• Room temp. < Set • Room temp.  
temp. –4°C  
Set temp. –3.5°C  
The outdoor unit controls the outdoor fan based upon  
the operation signal sent from the indoor unit, and also  
controls revolution speed of the compressor motor.  
a. The counted time is 28 minutes or more,  
and status that temperature of the outdoor  
heat exchanger detected by the outdoor  
heat exchanger is –20°C or lower continued  
for 2 minutes or more.  
The power coupler (IC20) for 4-way valve is turned on,  
and turned off in defrost operation.  
b. The counted time is 28 minutes or more,  
and status that temperature of the outdoor  
heat exchanger detected by the outdoor  
heat exchanger is –7°C or lower and  
temperature lowered by 2.5°C than the  
minimum value of the outdoor heat  
(1) Heating capacity control  
Calculate the difference between temperature  
detected by room temp. sensor every minute and  
the set temp. set on “Temp. indicator” and variation  
amount of room temp.  
exchanger during 10 to 15 minutes count  
time continued for 2 minutes or more.  
c. The counted time is 34 minutes or more,  
and status that temperature of the outdoor  
heat exchanger detected by the outdoor  
heat exchanger is -5°C or lower and  
temperature lowered by 3.0°C than the  
minimum value of the outdoor heat  
exchanger during 10 to 15 minutes count  
time continued for 2 minutes or more.  
d. If the following three conditions are satis-  
fied, defrost operation (Timer defrost) starts  
after heating operation for 37 minutes.  
1 Setting on remote control, HEAT  
Then, obtain the correction amount of the com-  
mand signal, and correct the current frequency  
command signal.  
(2) High-temp. release control  
If temperature of the indoor heat exchanger  
detected by the indoor heat exchanger sensor is  
55°C or higher, compressor motor speed is  
gradually lowered to prevent over-temp. rising of  
compressed pressure.  
If temperature becomes below 48°C, return to  
above item (1).  
(3) Current release control  
The input current of compressor and outdoor fan  
motor (Precisely inverter main circuit control  
section) which occupies most of air conditioner  
input is detected by the outdoor current sensor.  
The compressor motor speed is lowered gradually  
according to the range of TO (outside air temp.) if  
the input current exceeds the current value  
determined in each zone as shown in Fig. 8-2-8 so  
that the input current does not exceed the set  
value.  
(mode), HIGH  
(temp.).  
(Fan), 30°C  
2 Room temp. is 19°C to 24°C, and  
outside air temp. is 5°C or lower.  
3 Defrost operation has been already  
performed once.  
In case that the current lowered by approx. 0.5A  
than each set value, return to above item (1).  
– 29 –  
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FILE NO. SVM-03008  
2) Defrost operation  
8-2-4. Automatic operation  
Operation of the compressor is stopped once,  
turn off power coupler for 4-way valves after  
10 seconds, and then exchange the 4-way  
valves.  
After 20 seconds, restart operation of the  
compressor. Turn off the outdoor fan just when  
the compressor stopped.  
(1) As shown in Fig. 8-2-9, the operation mode  
(COOL, DRY, HEAT) is selected according to the  
outside temperature and room temperature when  
the operation has started.  
The operation in Fan mode continues until an  
operation mode is selected.  
If the room temperature is 20°C or higher when  
“AUTO” operation started within 2 hours after  
“HEAT” operation had stopped, select an operation  
mode after Fan operation of ultra low fan.  
In AUTO operation, the set temperature of each  
operation can be corrected by the remote  
controller in the range of 17 to 30°C.  
If temperature of the indoor heat exchanger  
lowered than 38°C, stop the indoor fan.  
3) Defrost reset  
Resetting operation from defrost to heating is  
performed when anyone of the following  
conditions is satisfied.  
a. Temperature of the outdoor heat exchanger  
rose to +8°C or higher.  
b. A status that temperature of the outdoor  
heat exchanger is +5°C or higher continued  
for 80 seconds.  
(2) After selecting the operation mode (COOL, DRY,  
HEAT), select an operation mode again when a  
status that the compressor was turned off by the  
room temperature or outside air temperature  
continues for 15 minutes.  
c. Defrost operation continued for 15 minutes.  
(3) Powerful Cool mode control  
In resetting defrost operation, the compressor  
stops for 50 seconds if defrost has started under  
condition a. to c. in item1), but the compressor is  
reset to heating operation keeping operated if  
defrost has started under condition d. in item 1).  
When the outside temperature is above 32°C and  
indoor temperature is above 28°C, select Cool  
mode control. In Cool mode, the air flow louver  
directs downward. When the room temperature  
gains access to the set temperature, it becomes  
cool memory position.  
(5) Louver control  
When the compressor is turned off by high-temp.  
release control, the vertical air flow louvers close  
once and then return to the position of previous  
time.  
Powerful Cooling/Drying with  
TA  
setting on remote controller  
Ts = 25°C  
28  
Cooling/Drying with setting  
on remote controller  
Ts = 25°C  
26  
24  
23  
Monitoring  
(Follow to the Fan control in  
previous mode when being  
selected again.)  
Heating with setting  
on remote controller  
Ts = 25°C  
20  
Ts correction by  
outside temperature  
To)  
5
15 18  
−1  
24  
32  
To  
−2  
0
+1  
(
Fig. 8-2-9  
– 30 –  
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FILE NO. SVM-03008  
8-3.Temporary Operation  
•
Temporary Auto operation, existence of Auto  
Restart, and Temporary Cooling operation can be  
set by the TEMPORARY button of the indoor  
controller.  
TEMPORARY button  
TEMPORARY button  
Fig. 8-3-1  
Table 8-3-1  
TEMPORARY button  
Control  
OFF → ON  
Temporary Auto operation start  
After pushing button  
for 3 seconds  
Auto Restart  
control select  
After pushing button  
for 10 seconds  
Temporary Cooling  
operation start  
8-3-1. Temporary auto operation  
•
When the TEMPORARY button is pushed, the  
Auto operation with set temperature fixed at 25°C  
starts. Controlling is same as that of Auto opera-  
tion by the remote controller.  
•
•
•
When the TEMPORARY button is pushed again,  
the operation stops.  
During Temporary Auto operation, operation by the  
remote controller is accepted.  
Using the Auto Restart function, the Temporary  
Auto operation starts when power failure is reset.  
8-3-2.Temporary cooling operation  
•
When the TEMPORARY operation button keeps  
pushed for 10 seconds, Cooling operation of  
which compressor motor speed and the indoor fan  
speed are fixed starts.  
Compressor motor speed :  
13 : 30 rps  
Indoor fan speed : Low  
•
•
When the TEMPORARY operation button is  
pushed again, the operation stops.  
Auto Restart function is unavailable.  
– 31 –  
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FILE NO. SVM-03008  
8-4-1. How to set auto restart function  
8-4. Auto Restart Function  
To set the auto restart function, proceed as follows:  
The power supply to the unit must be on; the function  
will not set if the power is off.  
Push the [TEMPORARY] button located in the center  
of the front panel continuously for three seconds.  
The unit receives the signal and beeps three times.  
The unit then restarts operating automatically in the  
event of power supply being accidentally shut down.  
The indoor unit is equipped with an automatic  
restarting function which allows the unit to restart  
operating with the set operating conditions in the event  
of power supply being accidentally shut down. The  
operation will resume without warning three minutes  
after power is restored. This function is not set to work  
when shipped from the factory. Therefore it is  
necessary to set it to work.  
•
When the unit is on standby (Not operating)  
Operation  
Motions  
Push [TEMPORARY] button for more  
than three seconds.  
The unit is on standby.  
The unit starts to operate.  
The green lamp is on.  
After approx. three seconds,  
The unit beeps three times  
and continues to operate.  
The lamp changes from  
green to orange.  
0
3S  
TEMPORARY button  
If the unit is not required to operate at this time, push [TEMPORARY]  
button once more or use the remote control to turn it off.  
•
When the unit is in operation  
Operation  
Motions  
Push [TEMPORARY] button for more  
than three seconds.  
The unit is in operation.  
The unit stops operating.  
The green lamp is on.  
The green lamp is turned off.  
After approx. three seconds,  
The unit beeps three times.  
0
3S  
If the unit is required to operate at this time, push [TEMPORARY]  
button once more or use the remote control to turn it on.  
TEMPORARY button  
•
•
•
While this function is being set, if the unit is in  
operation, the orange lamp is on.  
This function can not be set if the timer operation  
has been selected.  
When the unit is turned on by this function, the  
louver will not swing even though it was swinging  
automatically before shutting down.  
•
While the filter check lamp is on, the  
TEMPORARY button has the function of filter  
reset button.  
– 32 –  
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FILE NO. SVM-03008  
8-4-2. How to cancel auto restart function  
To cancel auto restart function, proceed as follows:  
Repeat the setting procedure: the unit receives the  
signal and beeps three times.  
The unit will be required to be turned on with the  
remote control after the main power supply is turned  
off.  
•
When the system is on standby (Not operating)  
Operation  
Motions  
Push [TEMPORARY] button for more  
than three seconds.  
The unit is on standby.  
The unit starts to operate.  
The orange lamp is on.  
After approx. three seconds,  
The unit beeps three times  
and continues to operate.  
The lamp changes from  
orange to orange.  
0
3S  
TEMPORARY button  
If the unit is not required to operate at this time, push [TEMPORARY]  
button once more or use the remote control to turn it off.  
•
When the system is operating  
Operation  
Motions  
Push [TEMPORARY] button for more  
than three seconds.  
The unit is in operation.  
The unit stops operating.  
The orange lamp is on.  
The orange lamp is turned off.  
After approx. three seconds,  
The unit beeps three times.  
0
3S  
If the unit is required to operate at this time, push [TEMPORARY]  
button once more or use the remote control to turn it on.  
TEMPORARY button  
•
While this function is being set, if the unit is in operation, the orange lamp is on.  
8-4-3. Power failure during timer operation  
8-5-1. How to turn off filter check lamp  
When the unit is in timer operation, if it is turned off  
because of power failure, the timer operation is  
cancelled. Therefore, set the timer operation again.  
Push [FILTER] button on the remote control.  
Or push [TEMPORARY] button on the indoor unit.  
Then we have to clarify it.  
NOTE:  
NOTE :  
The Every Timer is reset while a command signal can  
be received from the remote controller even if it  
stopped due to a power failure.  
If [TEMPORARY] button is pushed while the filter  
check lamp is not indicating, the indoor unit will start  
the automatic operation.  
When you want a temporary operation while the filter  
lamp lights, put out the lamp once, and then push the  
TEMPORARY button.  
8-5. Filter Check Lamp  
When the elapsed time reaches 1000 hours, the filter  
check lamp indicates. After cleaning the filters, turn off  
the filter check lamp.  
– 33 –  
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FILE NO. SVM-03008  
$ Memory button (MEMO)  
8-6. Remote Control and its Functions  
Keep pushing the MEMO button for 2 seconds  
from the beginning, or keep pushing the button for  
2 seconds after pushing it once for a short time.  
Then the set data is stored in the memory and  
is displayed.  
8-6-1. Parts name of remote control  
1 Infrared signal emitter  
Transmits a signal to the indoor unit.  
2 START/STOP button  
% Automatic operation button (AUTO)  
Push this button to operate the air conditioner  
automatically.  
Push the button to start operation.  
(A receiving beep is heard.)  
Push the button again to stop operation.  
(A receiving beep is heard.)  
If no receiving sound is heard from the indoor unit,  
push the button twice.  
& ECO timer button (ECO)  
Push this button to start the ECO timer (OFF  
timer) operation.  
You can select the OFF timer from among four  
settings (1,3,5 or 9 hours).  
3 Mode select button (MODE)  
Push this button to select a mode.  
Each time you press the button, a mode is  
selected in a sequence that goes from A : Auto  
changeover control, : Cool, : Dry, : Heat,  
: Fan only, and back to A.  
( FILTER button  
Push this button to turn off the filter cleaning lamp  
on the indoor unit.  
Push this button after cleaning the air filter.  
) PRESET button  
(A receiving beep is heard.)  
Push this button to operate the air conditioner  
according to settings memorized by the MEMO  
button.  
4 Temperature button (  
)
,....... The set temperature is increased up to  
30°C.  
9.......The set temperature is dropped down to  
17°C.  
~ TIMER button  
Use this button to change the clock, ON timer, and  
OFF timer times.  
To forward the time, push the “TIMER ” button.  
To set back the time, push the “TIMER ” button.  
(A receiving beep is heard.)  
5 Fan speed button (FAN)  
Push this button to select fan speed. When you  
select AUTO, the fan speed is automatically  
adjusted according to the room temperature.  
You can also manually select the desired fan  
speed from among five settings.  
1
(LOW , LOW+  
HIGH  
, MED  
, MED+  
,
)
(A receiving beep is heard.)  
6 Auto louver button (SWING)  
Push this button to swing the louver.  
(A receiving beep is heard.)  
AUTOA  
Push the FIX button to stop the louver swinging.  
(A receiving beep is heard.)  
7 Set louver button (FIX)  
PRESET  
Push this button to adjust the air flow direction.  
(A receiving beep is heard.)  
8 Off timer button (OFF)  
117
START/STOP  
Push this button to set the OFF timer.  
9 On timer button (ON)  
Push this button to set the ON timer.  
! Reserve button (SET)  
Push this button to reserve time settings.  
(A receiving beep is heard.)  
" Cancel button (CLR)  
Push this button to cancel ON timer and OFF  
timer. (A receiving beep is heard.)  
# High power button (Hi-POWER)  
AUTO  
FAN  
SWING  
FIX  
MODE  
114
115
1
12  
ECO  
Hi-POWER  
TIMER  
MEMO  
13  
1
ON  
OFF  
SET  
CLR  
111
110
118
FILTER  
RESET CLOCK CHECK  
116
Push this button to start the high power operation.  
– 34 –  
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FILE NO. SVM-03008  
8-6-2. Names and functions of indications on  
remote control  
6 TIMER and clock time display  
The time set for timer operation or clock time is  
indicated.  
The present time is always indicated except for  
TIMER operation.  
[Display]  
All indications, except for clock time indication, are  
indicated by pushing the START/STOP button.  
7 Hi-POWER display  
Indicates when the Hi-POWER operation starts.  
Push the Hi-POWER button to start and push it  
again to stop the operation.  
1 Transmission mark  
This transmission mark , indicates when the  
remote controller transmits signals to the indoor  
unit.  
8
(MEMORY) display  
Flashes for 4 seconds when the MEMO button is  
pushed during operation.  
mark is indicated when keeping the button  
depressed for more than 4 seconds while the  
mark is flashing.  
2 Mode display  
Indicates the current operation mode.  
(AUTO : Automatic control, A : Auto changeover  
control, : Cool, : Dry, : Heat, : Fan only)  
3 Temperature display  
Push another button to turn off the mark.  
9 ECO TIMER display  
Indicates the temperature setting (17 C to 30 C).  
When you set the operating mode to : Fan only,  
no temperature setting is indicated.  
4 Louver operation display  
Indicates when the ECO TIMER is in operation.  
Each time you push the ECO button, the display  
changes in the sequence of 1,3,5 or 9h.  
Indicates the louver positioning and operation.  
,
,
,
,
Five selectable positions  
Swing  
Automatic  
5 FAN speed display  
Indicates the selected fan speed. AUTO or one of  
five fan speed levels (LOW , LOW+  
MED , HIGH  
, MED+  
be indicated.  
,
) can  
Indicates AUTO when the operating mode is either  
AUTO or : Dry.  
3
1
2 8  
4
A
AUTOA  
9 7  
5
6
•
In the illustration, all indications are indicated for explanation.  
During operation, only the relevant indications will be indicated on the remote control.  
– 35 –  
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FILE NO. SVM-03008  
8-7. Hi POWER Mode ([Hi POWER] button  
on the remote control is pushed.)  
When [Hi POWER] button is pushed while the indoor  
unit is in Auto, Cooling or Heating operation, Hi  
POWER mark is indicated on the display of the remote  
control and the unit operates as follows.  
(1) Automatic operation  
•
The indoor unit operates in according to the  
current operation.  
(2) Cooling operation  
•
The preset temperature drops 1°C.  
(The value of the preset temperature on the  
remote controller does not change.)  
•
If the difference between the preset tempera-  
ture and the room temperature is big, the  
horizontal louver moves to the Hi POWER  
position automatically. Then when the differ-  
ence between them gets smaller, the horizontal  
louver returns automatically.  
(3) Heating operation  
•
The preset temperature increases 2°C. (The  
value of the preset temperature on the remote  
control does not change.)  
•
If the difference between the preset tempera-  
ture and the room temperature is big, the  
horizontal louver moves to the Hi POWER  
position automatically. Then when the differ-  
ence between them gets smaller, the horizontal  
louver returns automatically.  
(4) The Hi POWER mode can not be set in Dry or Fan  
only operation.  
– 36 –  
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FILE NO. SVM-03008  
9. INSTALLATION PROCEDURE  
For general public use  
9-1. Safety Cautions  
Power supply cord of parts of appliance for outdoor use shall be at least polychloroprene sheathed flexible  
cord (design H07RN-F), or cord designation 245 IEC66. (1.5 mm2 or more)  
New Refrigerant Air conditioner Installation  
CAUTION  
• THIS AIR CONDITIONER USESTHE NEW HFC REFRGERANT (R410A), WHICH DOES NOT  
DESTROY THE OZONE LAYER.  
R410A refrigerant is apt to be affected by impurity such as water, oxidizing membranes, and oils because  
the pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. As well as the adoption of this new  
refrigerant, refrigerating machine oil has also been changed. Therefore, during installation work, be sure that  
water, dust, former refrigerant, or refrigerating machine oil does not enter into the refrigerating cycle of a  
new-refrigerant air conditioner.  
To avoid mixing refrigerant and refrigerating machine oil, the sizes of charging port connecting sections on  
the main unit are different from those for the conventional refrigerant, and different size tools are also  
required. Accordingly, special tools are required for the new refrigerant (R410A) as shown below. For  
connecting pipes, use new and clean piping materials with high-pressure withstand capabilities, designed for  
R410A only, and ensure that water or dust does not enter. Moreover, do not use any existing piping as its  
pressure withstand may be insufficient, and may contain impurities.  
To Disconnect the Appliance from the Main Power Supply  
CAUTION  
This appliance must be connected to the main power supply by means of a circuit breaker or a switch with a  
contact separation of at least 3 mm.  
The installation fuse (25A D type  
conditioner. (RAS-13UKV-E2 only)  
) must be used for the power supply line of this air  
– 37 –  
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FILE NO. SVM-03008  
DANGER  
•
•
FOR USE BY QUALIFIED PERSONS ONLY.  
TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE  
ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.  
CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED  
WRONGLY, ELECTRIC PARTS MAY BE DAMAGED.  
•
•
•
CHECK THE EARTH WIRE THAT IT IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION.  
DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS.  
FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.  
TO PREVENT OVERHEATING THE INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT  
WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATERS,  
FURNACE, STOVES, ETC.  
•
•
WHEN MOVING THE AIR-CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY  
CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT WITH ANY OTHER GASEOUS BODY INTO  
THE REFRIGERATION CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE  
GAS PRESSURE IN THE REFRIGERATION CYCLE BECOMES ABNORMALLY HIGH AND IT  
RESULTINGLY CAUSES BURST OF THE PIPE AND INJURIES ON PERSONS.  
•
IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE  
INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS  
IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSES GENERATION OF POISONOUS GAS.  
WARNING  
•
•
•
•
Never modify this unit by removing any of the safety guards or bypassing any of the safety interlock  
switches.  
Do not install in a place which cannot bear the weight of the unit.  
Personal injury and property damage can result if the unit falls.  
Before doing the electrical work, attach an approved plug to the power supply cord.  
Also, make sure the equipment is properly earthed.  
Appliance shall be installed in accordance with national wiring regulations.  
If you detect any damage, do not install the unit. Contact your TOSHIBA dealer immediately.  
CAUTION  
•
Exposure of unit to water or other moisture before installation could result in electric shock.  
Do not store it in a wet basement or expose to rain or water.  
•
•
After unpacking the unit, examine it carefully for possible damage.  
Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify  
the noise level of the unit or where noise and discharged air might disturb neighbors.  
To avoid personal injury, be careful when handling parts with sharp edges.  
Please read this installation manual carefully before installing the unit. It contains further important  
instructions for proper installation.  
•
•
– 38 –  
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FILE NO. SVM-03008  
9-1-1. Installation Diagram of Indoor and Outdoor Units  
For the rear left and left  
piping  
Wall  
Hook  
1 Installation  
plate  
Insert the cushion between  
the indoor unit and wall, and  
lift the indoor unit for better  
operation.  
Do not allow the drain hose  
to get slack.  
Shield  
pipe  
Cut the piping  
hole sloped  
slightly  
5 Zeolite filter  
6 Purifying filter  
Make sure to run the drain  
hose sloped downward.  
8 Flat head wood screw  
The auxiliary piping can be  
connected the left, rear left,  
rear right, right, bottom right  
or bottom left.  
Before installing the  
wireless remote control  
• With the remote control cover  
open, load the batteries supplied  
4 Remote control holder  
2 Wireless remote control  
correctly, observing their polarity.  
2 Wireless remote control  
Right  
Cover  
Rear right  
Rear  
Left  
left  
Bottom  
right  
Vinyl tape Apply  
after carrying out  
a drainage test  
Bottom left  
3 Batteries  
Insulate the refrigerant  
pipes separately with  
insulation, not together.  
Saddle  
6 mm thick heat resisting  
polyethylene foam  
Extension  
drain hose  
(Option:  
RB–821SW)  
As show in the figure, hang  
power cord and connecting  
cable downward, and take out it  
along piping connection port.  
Fig. 9-1-1  
– 39 –  
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FILE NO. SVM-03008  
9-1-2. Optional installation parts  
Part  
Parts name  
Code  
Q’ty  
Refrigerant piping  
Liquid side : ∅6.35 mm  
Gas side : ∅9.52 mm  
One  
each  
A
Pipe insulating material  
(polyethylene foam, 6 mm thick)  
B
C
1
One  
each  
Putty, PVC tapes  
<Fixing bolt arrangement of outdoor unit>  
600  
Suction side  
115  
Drain hole  
Diffuser  
Fig. 9-1-2  
•
•
•
Secure the outdoor unit with the fixing bolts and nuts if the unit is likely to be exposed to a strong wind.  
Use ∅8 mm or ∅10 mm anchor bolts and nuts.  
If it is necessary to drain the defrost water, attach drain nipple to the bottom plate of the outdoor unit  
before installing it.  
– 40 –  
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FILE NO. SVM-03008  
9-1-3. Accessory and installation parts  
Part  
No.  
Part  
No.  
Part  
No.  
Part name (Q’ty)  
Part name (Q’ty)  
Part name (Q’ty)  
1
2
3
4
5
6
7
8
Installation plate x 1  
Remote control holder x 1  
Mounting screw ∅4 x 25 s x 6  
Flat head wood screw  
∅3.1 x 16 s x 2  
Wireless remote control x 1  
Zeolite filter x 1  
9
Drain nipple* x 1  
Battery x 2  
Purifying filter x 1  
The part marked with asterisk ( ) is packaged with the  
*
outdoor unit.  
Others  
Name  
Owner’s manual  
Installation manual  
This model is not equipped with an extension drain hose.  
Option :  
For the extension drain hose, use an optionally available RB-821SW or commercially available one.  
– 41 –  
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FILE NO. SVM-03008  
9-1-4. Installation/Servicing Tools  
<Changes in the product and components>  
In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged  
accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed.  
(1/2 UNF 20 threads per inch)  
•
In order to increase the pressure resisting strength of the refrigerant piping, flare processing diameter and  
size of opposite side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)  
New tools for R410A  
New tools for R410A  
Applicable to R22 model  
Changes  
Gauge manifold  
As pressure is high, it is impossible to measure by  
means of conventional gauge. In order to prevent any  
other refrigerant from being charged, each port  
diameter has been changed.  
Charge hose  
In order to increase pressure resisting strength, hose  
materials and port size have been changed (to 1/2  
UNF 20 threads per inch).  
When purchasing a charge hose, be sure to confirm  
the port size.  
Electronic balance  
for refrigerant charging  
As pressure is hight and gasification speed is fast, it  
is difficult to read the indicated value by means of  
charging cylinder, as air bubbles occur.  
Torque wrench  
(nominal diam. 1/2, 5/8)  
The size of opposite sides of flare nuts have been  
increased. Incidentally, a common wrench is used for  
nominal diameters 1/4 and 3/8.  
Flare tool  
(clutch type)  
By increasing the clamp bar’s receiving hole, strength  
of spring in the tool has been improved.  
Gauge for projection  
adjustment  
Used when flare is made by using conventional flare  
tool.  
Vacuum pump adapter  
Connected to conventional vacuum pump. It is  
necessary to use an adapter to prevent vacuum  
pump oil from flowing back to the charge hose.  
The charge hose connecting part has two ports-one  
for conventional refrigerant (7/16 UNF 20 threads per  
inch) and one for R410A. If the vacuum pump oil  
(mineral) mixes with R410A a sludge may occur and  
damage the equipment.  
Gas leakage detector  
Exclusive for HFC refrigerant.  
•
•
Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in  
the U. S’s ARI specified rose color (ARI color code: PMS 507).  
Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch  
corresponding to the charge hose’s port size.  
– 42 –  
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FILE NO. SVM-03008  
9-2-2. Cutting a hole and mounting installation  
plate  
9-2. Indoor Unit  
9-2-1. Installation place  
<Cutting a hole>  
•
•
•
A place which provides the spaces around the  
indoor unit as shown in the above diagram.  
A place where there is no obstacle near the air inlet  
and outlet.  
A place that allows easy installation of the piping to  
the outdoor unit.  
When installing the refrigerant pipes from the rear.  
•
•
A place which allows the front panel to be opened.  
The indoor unit shall be installed as top of the  
indoor unit comes to at least 2 m height.  
Also it must be avoided to put anything on the top of  
the indoor unit.  
Pipe hole  
65 mm  
The center of the pipe  
hole is above the arrow.  
100 mm  
CAUTION  
Fig. 9-2-2  
• Direct sunlight to the indoor unit’s wireless  
receiver should be avoided.  
1. After determining the pipe hole position on the  
mounting plate (A), drill the pipe hole (∅65 mm) at  
a slight downward slant to the outdoor side.  
• The microprocessor in the indoor unit should not  
be too close to RF noise sources.  
(For details, see the owner’s manual.)  
NOTE:  
<Remote controller>  
•
When drilling a wall that contains a metal lath, wire  
lath or metal plate, be sure to use a pipe hole brim  
ring sold separately.  
•
•
•
A place where there are no obstacles such as a  
curtain that may block the signal from the indoor  
unit.  
Do not install the remote control in a place exposed  
to direct sunlight or close to a heating source, such  
as a stove.  
Keep the remote control at least 1 m apart from the  
nearest TV set or stereo equipment. (This is  
necessary to prevent image disturbances or noise  
interference.)  
<Mounting the installation plate>  
For installation of the indoor unit, use the paper pattern  
on the back.  
Anchor bolt holes  
62  
82.5  
Hook  
•
The location of the remote control should be  
determined as shown below.  
170  
85  
(Side view)  
(Top view)  
Indoor unit  
1
Installation  
plate  
Hook  
Pipe  
hole  
Hook  
Pipe hole  
Thread  
7 Mounting screw  
Reception  
range  
Remote  
control  
Weight  
Indoor unit  
Reception  
range  
Remote  
control  
* : Axial distance  
Fig. 9-2-3  
Fig. 9-2-1  
– 43 –  
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FILE NO. SVM-03008  
<When the installation plate is directly mounted on 9-2-3. Electrical work  
the wall>  
1. The supply voltage must be the same as the rated  
voltage of the air conditioner.  
1. Securely fit the installation plate onto the wall by  
screwing it in the upper and lower parts to hook up 2. Prepare the power source for exclusive use with the  
the indoor unit.  
air conditioner.  
2. To mount the installation plate on a concrete wall  
with anchor bolts, utilize the anchor bolt holes as  
illustrated in the above figure.  
NOTE:  
•
Wire type : More than H07RN-F or 245 IEC66  
(1.0 mm2 or more)  
3. Install the installation plate horizontally in the wall.  
CAUTION  
CAUTION  
When installing the installation plate with a  
mounting screw, do not use the anchor bolt hole.  
Otherwise the unit may fall down and result in  
personal injury and property damage.  
• This appliance can be connected to the mains in  
either of the following two ways.  
(1) Connection to fixed wiring :  
A switch or circuit breake which disconnects  
all poles and has a contact separation of at  
least 3 mm must be incorporate in the fixed  
wiring. An approved circuit breaker or  
switches must used.  
Installation plate  
<Keep horizontal direction>  
Anchor  
bolt  
(2) Connection with power supply plug :  
Attach power supply plug with power cord and  
plug it into wall outlet. An approved power  
supply cord and plug must be used.  
Projection  
15 mm or less  
NOTE:  
•
Fig. 9-2-4  
Perform wiring works so as to allow a generous  
wiring capacity.  
5 mm dia. hole  
7 Mounting  
screw  
∅4 x 25s  
Clip anchor  
(local parts)  
Fig. 9-2-5  
CAUTION  
Failure to firmly install the unit may result in  
personal injury and property damage if the unit falls.  
•
•
In case of block, brick, concrete or similar type  
walls, make 5 mm dia. holes in the wall.  
Insert clip anchors for appropriate mounting screws  
7.  
NOTE:  
Secure four corners and lower parts of the  
•
installation plate with 4 to 6 mounting screws to  
install it.  
– 44 –  
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FILE NO. SVM-03008  
9-2-4. Wiring connection  
9-2-5. Piping and drain hose installation  
<How to connect the connecting cable>  
<Piping and Drain Hose Forming>  
Wiring of the connecting cable can be carried out  
without removing of the front panel.  
*
Since dewing results in a machine trouble, make  
sure to insulate both the connecting pipes. (Use  
polyethylene foam as insulating material.)  
1. Remove the air inlet grille.  
Open the air inlet grille upward and pull it toward  
you.  
2. Remove the terminal cover and cord clamp.  
3. Insert the connecting cable (according to the local  
cords) into the pipe hole on the wall.  
4. Take out the connecting cable through the cable  
slot on the rear panel so that it protrudes about  
15 cm from the front.  
5. Insert the connecting cable fully into the terminal  
block and secure it tightly with screws.  
6. Tightening torque : 1.2 N·m (0.12 kgf·m)  
7. Secure the connecting cable with the cord clamp.  
8. Fix the terminal cover, rear plate bushing and air  
inlet grille on the indoor unit.  
Rear right  
Rear left  
Bottom left  
Left  
Bottom right  
Right  
Fig. 9-2-8  
1. Die-cutting Front panel slit  
Cut out the slit on the left or right side of the front panel  
for the left or right connection and the slit on the  
bottom left or right side of the front panel for the  
bottom left or right connection with a pair of nippers.  
CAUTION  
• Be sure to refer to the wiring system diagram  
labeled inside the front panel.  
• Check local electrical cords and also any specific  
wiring instructions or limitations.  
2. Changing drain hose  
For left connection, bottom-leftward connection and  
rear-leftward connection’s piping, it is necessary to  
change the drain hose and drain cap.  
Terminal block  
Terminal cover  
Cord clamp  
<How to remove the Drains Cap>  
Clip drain cap by needle-nose pliers, and pull out.  
Screw  
Connecting  
cable  
Earth line  
Connecting cable  
Earth line  
Screw  
Screw  
Fig. 9-2-9  
Fig. 9-2-6  
<How to install the Drain Hose>  
Firmly insert drain hose connecting part until hitting on  
a heat insulator.  
80 mm  
10 mm  
10 mm  
Heat insulator  
10 mm  
50 mm  
Drain hose  
NOTE:  
Fig. 9-2-10  
•
Wire type : More than H07RN-F or 245 IEC66  
(1.0 mm2 or more)  
Fig. 9-2-7 Stripping length of connecting cable  
– 45 –  
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FILE NO. SVM-03008  
<How to fix the Drains Cap>  
<Left-hand connection with piping>  
1) Insert hexagonal wrench (∅4 mm) in a center head. Bend the connecting pipe so that it is laid within 43 mm  
above the wall surface. If the connecting pipe is laid  
exceeding 43 mm above the wall surface, the indoor  
unit may unstably be set on the wall. When bending the  
connecting pipe, make sure to use a spring bender so  
as not to crush the pipe.  
∅4 mm  
Bend the connection pipe within a radius of 30 mm  
(∅6.35) 40 mm (∅9.52).  
Fig. 9-2-11  
To connect the pipe after installation of the unit (figure)  
2) Firmly insert drains cap.  
(To the forefront of flare)  
270 mm  
Liquid side  
No gap  
170 mm  
Gas side  
Do not apply lubricating oil  
(refrigerant machine oil) when  
inserting the drain cap. Application  
causes deterioration and drain  
leakage of the plug.  
Outward form of indoor unit  
Insert a hexagon  
wrench (∅4 mm)  
R 30 mm or less (∅6.35) R 40 mm or less (∅9.52)  
(Use polisin (polyethylene core) or the like for  
bending pipe.)  
Fig. 9-2-12  
Use the handle of screwdriver, etc.  
CAUTION  
Fig. 9-2-15  
Firmly insert the drain hose and drain cap;  
otherwise, water may leak.  
NOTE:  
If the pipe is bent incorrectly, the indoor unit may  
unstably be set on the wall.  
After passing the connecting pipe through the pipe  
hole, connect the connecting pipe to the auxiliary pipes  
and wrap the facing tape around them.  
<In case of right or left piping>  
•
After scribing slits of the front panel with a knife or a  
making-off pin, cut them with a pair of nippers or an  
equivalent tool.  
CAUTION  
• Bind the auxiliary pipes (two) and connecting  
cable with facing tape tightly. In case of leftward  
piping and rear-leftward piping, bind the auxiliary  
pipes (two) only with facing tape.  
Slit  
Fig. 9-2-13  
Indoor unit  
Auxiliary pipes  
Connecting cable  
<In case of bottom right or bottom left piping>  
•
After scribing slits of the front panel with a knife or a  
making-off pin, cut them with a pair of nippers or an  
equivalent tool.  
Installation plate  
Fig. 9-2-16  
• Carefully arrange pipes so that any pipe does not  
stick out of the rear plate of the indoor unit.  
• Carefully connect the auxiliary pipes and  
connecting pipes to each other and cut off the  
insulating tape wound on the connecting pipe to  
avoid double-taping at the joint, moreover, seal  
the joint with the vinyl tape, etc.  
Slit  
Fig. 9-2-14  
• Since dewing results in a machine trouble, make  
sure to insulate both the connecting pipes. (Use  
polyethylene foam as insulating material.)  
• When bending a pipe, carefully do it not to crush it.  
– 46 –  
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FILE NO. SVM-03008  
9-2-6. Indoor unit fixing  
2. Put water in the drain pan and make sure that the  
water is drained out of doors.  
3. When connecting extension drain hose, insulate the  
connecting part of extension drain hose with shield  
pipe.  
1. Pass the pipe through the hole in the wall, and hook  
the indoor unit on the installation plate at the upper  
hooks.  
2. Swing the indoor unit to right and left to confirm that  
it is firmly hooked up on the installation plate.  
3. While pressing the indoor unit onto the wall, hook it  
at the lower part on the installation plate. Pull the  
indoor unit toward you to confirm that it is firmly  
hooked up on the installation plate.  
Shield pipe  
Extension drain hose  
Inside the room  
Drain hose  
Fig. 9-2-20  
Hook here  
1
1 Installation plate  
CAUTION  
Arrange the drain pipe for proper drainage from the  
unit.  
Improper drainage can result in dew-dropping.  
2
Hook  
Push  
(unhook)  
Fig. 9-2-17  
This air conditioner has the structure designed to drain  
water collected from dew, which forms on the back of  
the indoor unit, to the drain pan.  
Therefore, do not store the power cord and other parts  
at a height above the drain guide.  
•
For detaching the indoor unit from the installation  
plate pull the indoor unit toward you while pushing  
its bottom up at the specified parts.  
Wall  
Drain guide  
Space for pipes  
Push  
Push  
Fig. 9-2-18  
Fig. 9-2-21  
9-2-7. Drainage  
1. Run the drain hose sloped downwards.  
NOTE:  
•
Hole should be made at a slight downward slant on  
the outdoor side.  
Do not form the  
drain hose into  
a wavy shape.  
Do not rise the  
drain hose.  
50 mm  
or more  
Do not put  
the drain  
hose end  
into water.  
Do not put  
the drain  
hose end in  
the drainage  
ditch.  
Fig. 9-2-19  
– 47 –  
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FILE NO. SVM-03008  
9-3-2. Refrigerant piping connection  
9-3. Outdoor Unit  
<Flaring>  
9-3-1. Installation place  
1. Cut the pipe with a pipe cutter.  
•
•
A place which provides the spaces around the  
outdoor unit as shown in the left diagram.  
A place which can bear the weight of the outdoor  
unit and does not allow an increase in noise level  
and vibration.  
Roughness  
Obliquity  
Warp  
90°  
•
A place where the operation noise and discharged  
air do not disturb users neighbors.  
Fig. 9-3-2  
•
•
•
•
A place which is not exposed to a strong wind.  
A place free of a leakage of combustible gases.  
A place which does not block a passage.  
When the outdoor unit is to be installed in an  
elevated position, be sure to secure its feet.  
An allowable length of the connecting pipe is up  
15 m.  
2. Insert a flare nut into the pipe, and flare the pipe.  
• Projection margin in flaring : A (Unit : mm)  
A
•
•
•
An allowable height level is up to 10 m.  
A place where the drain water does not raise any  
problem.  
Die  
Pipe  
Fig. 9-3-3  
CAUTION  
Rigid (Clutch type)  
1. Install the outdoor unit without anything blocking  
the air discharging.  
Outer dia.  
R410A  
tool used  
Conventional  
tool used  
2. When the outdoor unit is installed in a place  
exposed always exposed to strong wind like a  
coast or on a high storey of a building, secure  
the normal fan operation using a duct or a wind  
shield.  
of copper pipe  
6.35  
9.52  
0 to 0.5  
0 to 0.5  
1.0 to 1.5  
1.0 to 1.5  
3. In particularly windy areas, install the unit such  
as to avoid admission of wind.  
4. Installation in the following places may result in  
trouble.  
Imperial (wing nut type)  
Outer dia.  
of copper pipe  
R410A  
Do not install the unit in such places.  
• A place full of machine oil.  
6.35  
9.52  
1.5 to 2.0  
1.5 to 2.0  
• A saline-place such as the coast.  
• A place full of sulfide gas.  
<Tightening connection>  
• A place where high-frequency waves are likely  
to be generated as from audio equipment,  
welders, and medical equipment.  
Align the centers of the connecting pipes and tighten  
the flare nut as far as possible with your fingers. Then  
tighten the nut with a spanner and torque wrench as  
shown in the figure.  
Half union  
Flare nut  
Strong  
wind  
Externally  
Internally  
threaded side  
threaded side  
Use a wrench to secure.  
Use a torque wrench to tighten.  
Fig. 9-3-1  
Fig. 9-3-4  
CAUTION  
• Do not apply excess torque.  
• Otherwise, the nut may crack depending on the  
conditions.  
– 48 –  
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FILE NO. SVM-03008  
(Unit : N·m) 9-3-3. Evacuating  
Outer dia.  
of copper pipe  
After the piping has been connected to the indoor unit,  
you can perform the air purge together at once.  
Tightening torque  
∅6.35 mm  
16 to 18 (1.6 to 1.8 kgf·m)  
30 to 42 (3.0 to 4.2 kgf·m)  
AIR PURGE  
Evacuate the air in the connecting pipes and in the  
indoor unit using a vacuum pump. Do not use the  
refrigerant in the outdoor unit. For details, see the  
manual of the vacuum pump.  
∅9.52 mm  
•
Tightening torque of flare pipe connections  
The operating pressure of R410A is higher than that of  
R22. (Approx. 1.6 times).  
<Using a vacuum pump>  
It is therefore necessary to firmly tighten the flare pipe  
connecting sections (which connect the indoor and  
outdoor units) up to the specified tightening torque.  
Incorrect connections may cause not only a gas  
leakage, but also damage to the refrigerant cycle.  
Be sure to use a vacuum pump with counter-flow  
prevention function so that inside oil of the pump does  
not flow backward into pipes of the air conditioner  
when the pump stops. (If oil inside of the vacuum pump  
enters into the air conditioner, which use R410A,  
refrigeration cycle trouble may result.)  
1. Connect the charge hose from the manifold valve to  
the service port of the gas side packed valve.  
2. Connect the charge hose to the port of the vacuum  
pump.  
Flare at  
indoor unit side  
3. Open fully the low pressure side handle of the  
gauge manifold valve.  
4. Operate the vacuum pump to start evacuating.  
Perform evacuating for about 15 minutes if the  
piping length is 20 meters. (15 minutes for  
20 meters) (assuming a pump capacity of 27 liters  
per minute. Then confirm that the compound  
pressure gauge reading is –101 kPa (–76 cmHg).  
5. Close the low pressure side valve handle of gauge  
manifold.  
6. Open fully the valve stem of the packed valves  
(both side of Gas and Liquid).  
7. Remove the charging hose from the service port.  
8. Securely tighten the caps on the packed valves.  
Flare at  
outdoor unit side  
Fig. 9-3-5  
<Shaping pipes>  
1. How to shape the pipes  
Shape the pipes along the incused line on the  
outdoor unit.  
2. How to fit position of the pipes  
Put the edges of the pipes to the place with a  
distance of 85 mm from the incused line.  
Compound  
Pressure gauge  
pressure  
gauge  
-101kPa  
Manifold valve  
(-76cmHg)  
Handle Hi  
Handle Lo  
(Keep full closed)  
Charge hose  
(For R410A only)  
Charge hose  
(For R410A only)  
Vacuum pump  
adapter for  
Incused line  
counter-flow  
prevention  
Connecting  
pipe  
(For R410A only)  
Vacuum  
pump  
Packed valve at liquid side  
Packed valve at gas side  
Service port  
(Valve core (Setting pin))  
Fig. 9-3-6  
Fig. 9-3-7  
CAUTION  
• KEEP IMPORTANT 4 POINTS FOR PIPING  
WORK  
(1) Take away dust and moisture (Inside of the  
connecting pipes.)  
(2) Tight connection (between pipes and unit)  
(3) Evacuate the air in the connecting pipes using  
VACUUM PUMP.  
(4) Check gas leak (connected points)  
– 49 –  
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FILE NO. SVM-03008  
<Packed valve handling precautions>  
<Stripping length of connection cable>  
•
•
Open the valve stem all the way out; but do not try  
to open it beyond the stopper.  
Securely tighten the valve stem cap with torque in  
the following table:  
Terminal block  
Gas side  
30 to 42 N·m  
(∅9.52 mm)  
(3.0 to 4.2 kgf·m)  
Liquid side  
16 to 18 N·m  
Power cord  
(∅6.35 mm)  
(1.6 to 1.8 kgf·m)  
Connecting cable  
9 to 10 N·m  
(0.9 to 1.0 kgf·m)  
Service port  
1
2
3
L
N
40  
40  
Hexagonal wrench  
is required.  
30  
30  
Earth line  
Earth line  
Power cord  
Connecting cable  
Fig. 9-3-9  
Model  
RAS-13UKV-E2  
Fig. 9-3-8  
9-3-4. Wiring connection  
Power source  
50/60 Hz, 220 – 240 V Single phase  
Maximum  
running current  
11A  
1. Remove the valve cover from the outdoor unit.  
2. Connect the connecting cable to the terminal as  
identified with their respective matched numbers on  
the terminal block of indoor and outdoor unit.  
3. When connecting the connecting cable to the  
outdoor unit terminal, make a loop as shown in the  
installation diagram of indoor and outdoor unit, to  
prevent water coming in the outdoor unit.  
Installation fuse  
rating  
25A (D type  
)
H07RN-F or 245 IEC66 (1.5 mm2  
or more)  
Power cord  
CAUTION  
4. Insulate the unused cords (conductors) from any  
water coming in the outdoor unit. Proceed them so  
that they do not touch any electrical or metal parts.  
• Wrong wiring connection may cause some  
electrical parts burn out.  
• Be sure to comply with local codes on running  
the wire from indoor unit to outdoor unit (size of  
wire and wiring method etc).  
• Every wire must be connected firmly.  
• This installation fuse (25A D type  
) must  
be used for the power supply line of this air  
conditioner.  
• If incorrect or incomplete wiring is carried out, it  
will cause an ignition or smoke.  
• Prepare the power supply for exclusive use with  
the air conditioner.  
• This product can be connected to the mains.  
Connection to fixed wiring: A switch which  
disconnects all poles and has a contact  
separation of at least 3 mm must be incorporated  
in the fixed wiring.  
NOTE: Connecting cable  
•
Wire type: More than H07RN-F or 245 IEC66  
(1.0 mm2 or more)  
– 50 –  
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FILE NO. SVM-03008  
9-3-5. Gas leak test  
9-3-7. Auto restart setting  
This product is designed so that, after a power failure,  
it can restart automatically in the same operating mode  
as before the power failure.  
Check places for  
indoor unit (Flare  
nut connection)  
Valve cover  
Information  
The product was shipped with Auto Restart function  
in the off position. Turn it on as required.  
<How to set the auto restart>  
Electric parts  
cover  
•
Press and hold down the TEMPORARY button for  
about 3 seconds. After 3 seconds, the electronic  
beeper makes three short beeps to tell you the Auto  
Restart has been selected.  
•
To cancel the Auto Restart, follow the steps  
described in the section Auto Restart Function of  
the Owner’s Manual.  
Check places  
for outdoor unit  
Fig. 9-3-10  
•
Check the flare nut connections for the gas leak  
with a gas leak detector or soap water.  
9-3-6. Test operation  
To switch the TEST RUN (COOL) mode, push  
TEMPORARY button for 10 sec.  
(The beeper will make a short beep.)  
TEMPORARY button  
Fig. 9-3-11  
– 51 –  
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FILE NO. SVM-03008  
10. HOW TO DIAGNOSE THE TROUBLE  
The pulse modulating circuits are mounted to both  
NOTE:  
indoor and outdoor units. Therefore, diagnose troubles  
according to the diagnosis procedure as described  
below. (Refer to the check points in servicing written  
on the wiring diagrams attached to the indoor/outdoor  
units.)  
A large-capacity electrolytic capacitor is used in the  
outdoor unit control (inverter). Therefore, if the power  
supply is turned off, charge (charging voltage DC280V)  
remains and discharging takes a lot of time. After  
turning off the power source, if touching the charging  
section before discharging, an electrical shock may be  
caused. Discharge the electrolytic capacitor completely  
by using soldering iron, etc.  
Table 10-1  
No.  
1
Troubleshooting Procedure  
First Confirmation  
Page  
52  
<Discharging method>  
2
Primary Judgment  
53  
(1) Remove the inverter cover (plating) by opening four  
mounting claws.  
3
Judgment by Flashing LED  
of Indoor Unit  
54  
(2) As shown below, connect the discharge resistance  
(approx. 100Ω40W) or plug of the soldering iron to  
voltage between + – terminals of the C14  
(“CAUTION HIGH VOLTAGE 380 V” is indicated.)  
electrolytic capacitor (500µF/400 V) on P.C. board,  
and then perform discharging.  
4
5
Self-Diagnosis by Remote Control  
55  
58  
Judgment of Trouble by  
Every Symptom  
6
How to Check Simply the Main Parts  
66  
Inverter cover  
Plug of  
soldering  
iron  
P. C. board  
(Soldered surface)  
Discharging position  
(Discharging period  
10 seconds or more)  
Fig. 10-1  
10-1-2. Confirmation of power voltage  
10-1. First Confirmation  
Confirm that power voltage is AC 220-240 V ± 10%. If  
power voltage is not in this range, the unit may not  
operate normally.  
10-1-1. Confirmation of power supply  
Confirm that the power breaker operates (ON)  
normally.  
– 52 –  
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FILE NO. SVM-03008  
10-1-3. Operation which is not a trouble (Program operation)  
For controlling the air conditioner, the program operations are built in the microcomputer as described in the  
following table. If a claim is made for running operation, check whether or not it meets to the contents in the  
following table. When it does, we inform you that it is not trouble of equipment, but it is indispensable for control-  
ling and maintaining of air conditioner.  
Table 10-1-1  
No.  
Operation of air conditioner  
Description  
1
When power breaker is turned “ON”,  
the operation lamp (Green) of the  
indoor unit flashes.  
The OPERATION lamp of the indoor unit flashes when power source  
is turned on. If [START/STOP] button is operated once, flashing stops.  
(Flashes also in power failure)  
2
Compressor may not operate even if  
the room temperature is within range of  
compressor-ON.  
The compressor does not operate while compressor restart delay  
timer (3-minutes timer) operates. The same phenomenon is found  
after power source has been turned on because 3-minutes timer  
operates.  
3
4
In Dry and ECO. mode, FAN (air flow)  
display does not change even though  
FAN (air flow select) button is operated.  
The air flow indication is fixed to [AUTO].  
Increasing of compressor motor speed  
stops approx. 30 seconds after  
For smooth operation of the compressor, the compressor motor speed  
is restricted to Max. 41 rps for 2 minutes, and Max.91 rps for 2 minutes  
operation started, and then compressor to 3 minutes, respectively after the operation has started.  
motor speed increases again approx.  
30 seconds after.  
5
The set value of the remote control  
should be below the room temperature.  
If the set value is above the room temperature, Cooling operation is  
not performed. And check whether battery of the remote control is  
consumed or not.  
6
7
In AUTO mode, the operation mode is  
changed.  
After selecting Cool or Heat mode, select an operation mode again if  
the compressor keeps stop status for 15 minutes.  
In HEAT mode, the compressor motor  
speed does not increase up to the  
maximum speed or decreases before  
the temperature arrives at the set  
temperature.  
The compressor motor speed may decrease by high-temp. release  
control (Release protective operation by temp.-up of the indoor heat  
exchanger) or current release control.  
10-2. Primary Judgment  
To diagnose the troubles, use the following methods.  
(1) Judgment by flashing LED of indoor unit  
(2) Self-diagnosis by service check remote control  
(3) Judgment of trouble by every symptom  
Firstly, use the method (1) for diagnosis. Then, use the method (2) and (3) to diagnose the details of troubles.  
– 53 –  
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FILE NO. SVM-03008  
10-3. Judgment by Flashing LED of Indoor Unit  
While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the  
contents of self-diagnosis are displayed with block on the indoor unit indication section.  
Table 10-3-1  
Check  
Item  
A
Block display  
Description for self-diagnosis  
code  
B
C
D
E
NOTES:  
(1) The contents of items B and C and a part of item E are displayed when air conditioner operates.  
(2) When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B.  
(3) The check codes can be confirmed on the remote control for servicing.  
– 54 –  
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FILE NO. SVM-03008  
10-4. Self-Diagnosis by Remote Control  
(Check Code)  
(1) If the lamps are indicated as shown B to H in  
Table 10-3-1, excute the self-diagnosis by the  
remote control.  
(2) When the remote control is set to the service  
mode, the indoor control diagnoses the operation  
condition and indicate the information of the  
self-diagnosis on the display of the remote control  
with the check codes. If a fault is detected, all  
lamps on the indoor unit will flashes at 5Hz and it  
will beep for 10 seconds (Pi, Pi, Pi....). The timer  
lamp usually flashes (5Hz) during self-diagnosis.  
10-4-1. How to use remote control in service mode  
SET  
CLR  
RESET CLOCK CHECK  
(1) Push [CHECK] button with a tip of pencil to set the  
remote control to the service mode.  
• “00” is indicated on the display of the remote  
control.  
• The timer lamp of the indoor unit flashes  
continuously. (5 times per 1 sec.)  
AUTOA  
(2) Push [TIMER 8] button.  
If there is no fault with a code, the indoor unit will  
beep once (Pi) and the display of the remote  
control will change as follows:  
PRESET  
START/STOP  
00  
01  
02 1d  
1E  
22  
AUTO  
FAN  
SWING  
FIX  
MODE  
• Check the unit with all 35 check codes (00 to 22)  
as shown in Table 10-4-1.  
ECO  
Hi-POWER  
TIMER  
MEMO  
• Push [TIMER 9] button to change the check  
code backward.  
ON  
OFF  
SET  
CLR  
If there is a fault, the indoor unit will beep for 10  
seconds (Pi, Pi, Pi...).  
FILTER  
RESET CLOCK CHECK  
Note the check code on the display of the remote  
control.  
• 2-digits alphanumeric will be indicated on the  
display.  
• All lamps on the indoor unit will flash. (5 times  
per 1 sec.)  
(3) Push [CLR] button. After service finish for clear  
service code in memory.  
• “7F” is indicated on the display of the remote  
control.  
(4) Push [START/STOP] button to release the service  
mode.  
Alphanumeric characters are used for the check code.  
• The display of the remote control returns to as it  
was before service mode was engaged.  
is 5.  
is A.  
is C.  
is 6.  
is B.  
is D.  
Fig. 10-4-1  
– 55 –  
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FILE NO. SVM-03008  
10-4-2. Caution at servicing  
(1) After servicing, push the START/STOP button to return to the normal mode.  
(2) After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power  
supply again so that memory in the microcomputer returns the initial status. However, the check codes are  
not deleted even if the power supply is turned off because they are stored in the fixed memory.  
Table 10-4-1  
Block distinction  
Operation of diagnosis function  
Air conditioner  
Judgment and action  
Check  
Block  
Check  
code  
Cause of operation  
Remarks  
code  
status  
Displayed when  
error is detected.  
Indoor  
P. C.  
board  
etc.  
Short-circuit or disconnec-  
tion of the room  
temperature sensor  
(TA sensor).  
Operation  
continues.  
1. Check the room temp. sensor.  
2. When the room temp. sensor is  
normal, check P.C. board.  
Displayed when  
error is detected.  
Being out of place,  
disconnection, short-circuit,  
or migration of heat  
exchanger sensor  
(TC sensor)  
Operation  
continues.  
1. Check heat exchanger sensor.  
2. When heat exchanger sensor is  
normal, check P.C. board.  
Displayed when  
error is detected.  
Lock of indoor fan or trouble All off  
on the indoor fan circuit  
1. Check P.C. board.  
2. When P.C. board is normal, check  
the motor.  
Displayed when  
error is detected.  
Not  
displayed  
Trouble on other indoor  
P.C. boards  
Operation  
continues.  
Replace P.C. board.  
Flashes when  
trouble is  
Connec-  
ting cable  
and serial  
signal  
Return serial signal is not  
sent to indoor side from  
operation started.  
(1) Defective wiring of  
connecting cable  
(2) Operation of  
Operation  
continues.  
1. When the outdoor unit never  
operate:  
(1) Check connecting cable, and  
correct if defective wiring.  
(2) Check 25A fuse of inverter  
P.C. board  
detected on  
return serial  
signal, and  
normal status  
when signal is  
reset.  
compressor thermo.  
Gas shortage  
(3) Check 3.15A of inverter  
P.C. board.  
Gas leak  
2. To display [Other] block during  
operation, check compressor  
thermo. operation and supply gas  
(check gas leak also).  
3. Unit operates normally during  
check.  
If Return serial signal does not  
stop between 2 and 3 of the  
indoor terminal block, replace  
inverter P.C. board.  
If signal stops between indoor  
terminal block 2 and 3, replace  
indoor P.C. board.  
Flashes when  
trouble is  
detected on  
operation  
command signal,  
and normal status  
when signal is  
reset.  
Operation command signal  
is not sent to outdoor side.  
Operation  
continues.  
If return serial signal does not stop  
between indoor terminal block 2  
and 3, replace inverter P.C. board.  
If signal stops between indoor  
terminal block 2 and 3, replace  
indoor P.C. board.  
– 56 –  
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FILE NO. SVM-03008  
Block distinction  
Operation of diagnosis function  
Air conditioner  
Judgment and action  
Check  
Block  
Check  
code  
Cause of operation  
Remarks  
code  
status  
Displayed when  
error is detected.  
Ondoor  
P. C.  
board  
Inverter over-current  
protective circuit operates.  
(Short time)  
All off  
Even if trying operation again, all  
operations stop immediately. :  
Replace P.C. board.  
Displayed when  
error is detected.  
Position-detect circuit error  
or short-circuit between  
windings of compressor  
All off  
1. Even if connecting lead wire of  
compressor is removed, position-  
detect circuit error occurred.  
: Replace P.C. board.  
2. Measure resistance between  
wires of compressor, and perform  
short circuit. : Replace  
compressor.  
Displayed when  
error is detected.  
Current-detect circuit error  
All off  
All off  
Even if trying operation again, all  
operations stop immediately. :  
Replace P.C. board.  
Displayed when  
error is detected.  
Being out of place,  
disconnection or short-  
circuit of outdoor temp.  
sensor  
1. Check outdoor temp. sensors  
(TE, TS).  
2. Check P.C. board.  
Displayed when  
error is detected.  
Disconnection or short-  
circuit of discharge temp.  
sensor  
All off  
All off  
1. Check discharge temp. sensor (TD).  
2. Check P.C. board.  
Displayed when  
error is detected.  
Outdoor fan drive system  
error  
Position-detect error, over-current  
protective operation of outdoor fan  
drive system, fan lock, etc. :  
Replace P.C. board or fan motor.  
–––  
Not  
displayed  
Outdoor heat exchanger  
temp. sensor error  
Operation  
continues.  
1. Check outdoor heat exchanger  
temp. sensor (TE).  
2. Check P.C. board.  
Displayed when  
error is detected.  
Ondoor  
P. C.  
board  
Compressor drive output  
error, Compressor error  
(lock, missing, etc.),  
Break down  
All off  
When 20 seconds passed after  
startup, position-detect circuit error  
occurred. : Replace compressor.  
Flashes when  
trouble is  
Others  
(including  
compres-  
sor)  
Return serial signal has  
been sent when operation  
started, but it is not sent  
from halfway.  
(1) Compressor thermo.  
operation  
Gas shortage  
Gas leak  
(2) Instantaneous power  
failure  
Operation  
continues.  
1. Repeat Start and Stop with  
interval of approx. 10 to 40  
minutes. (Code is not displayed  
during operation.)  
Supply gas. (Check also gas leak.)  
2. Unit operates normally during  
check.  
If return serial signal does not  
stop between indoor terminal  
block, 2 and 3 replace inverter  
P.C. board.  
detected on  
return serial  
signal, and  
normal status  
when signal is  
reset.  
If signal stops between indoor  
terminal block, 2 and 3 replace  
indoor P.C. board.  
Displayed when  
error is detected.  
Compressor does not  
rotate. (Current protective  
circuit does not operate  
when a specified time  
passed after compressor  
had been activated.)  
All off  
1. Trouble on compressor  
2. Trouble on wiring of compressor  
(Missed phase)  
Discharge temp. exceeded  
117°C  
All off  
All off  
1. Check discharge temp. sensor (TD).  
2. Degassing  
3. Trouble on P.M.V.  
Displayed when  
error is detected.  
Break down of compressor  
1. Check power voltage. (220-240 V  
+10%)  
2. Overload operation of  
refrigeration cycle  
Displayed when  
error is detected.  
Check installation condition  
(Short-circuit of outdoor diffuser.)  
Four-way valve inverse error  
(TC sensor value lowered  
during heating operation.)  
1. Check 4-way valve operation.  
–––  
Operation  
continues.  
– 57 –  
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FILE NO. SVM-03008  
10-5. Judgment of Trouble by Every Symptom  
10-5-1. Indoor unit (Including remote contro)  
(1) Power is not turned on (Does not operate entirely)  
<Primary check>  
1. Is the supply voltage normal?  
2. Is the normal voltage provided to the outdoor unit?  
3. Is the crossover cable connected properly?  
4. Is the fuse (F01) blown?  
Operation  
Check Item  
Considerable principle cause  
Turn off power supply once, and  
5 second later, turn it on again.  
Measures  
Item by symptoms  
NO  
Is OPERATION lamp flashing?  
YES  
Does transmission mark  
Is it possible to turn on  
power supply by pushing  
[START/STOP] button  
on remote control?  
NO  
NO  
on remote control flash  
normally, and is its signal  
transmitted properly?  
Remote control is defective.  
YES  
YES  
Refer to (5) Troubleshooting  
for remote control .  
Unit operates normally.  
Does fan  
YES  
Is fuse (F01)  
of indoor control  
board blown?  
YES  
motor connector  
between 1 and 2  
short-circuit?  
Parts (R01, R04, DB01, C01,  
C03, IC01 and T01) are defective.  
NO  
NO  
Is voltage  
(DC12 V or 5 V)  
indicated on rear of  
indoor control  
NO  
YES  
Microcomputer  
is defective.  
Replace main  
P.C. board  
board normal?  
Is DC310-340 V  
supplied to  
primary side of  
transfer switch?  
NO  
NO  
Refer to <Primary check>  
or this problem is one step  
short of power P.C. board block.  
YES  
Transfer swith,  
IC (IC01) for  
power supply or  
fan motor is  
Are DC15 V, 12 V  
and 7 V supplied to  
secondary side of  
transfer switch?  
Are DC15 V, 12 V  
NO  
Turn off breaker once  
and turn it on again  
after removing motor.  
and 7 V supplied to  
secondary side of  
transfeor switch?  
defective.  
YES  
YES  
Replace motor.  
• Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of  
damage of the motor.  
– 58 –  
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FILE NO. SVM-03008  
(2) Power is not turned on though Indoor P.C. board is replaced  
<Confirmation procedure>  
Turn on power supply.  
NO  
NO  
Does operation  
lamp flash?  
Is wired connectly to white and black  
lead wires of terminal block?  
Correct wirng.  
YES  
YES  
To item of Power supply  
is not turned on .  
– 59 –  
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FILE NO. SVM-03008  
(3) Only indoor fan motor does not operate.  
<Primary check>  
(1) Is it possible to detect the power supply voltage (200 – 240 V) between 1 and 2 on the terminal block?  
(2) Does the indoor fan motor operate in cooling operation?  
(In heating operation, the indoor fan motor does not operate for approximately 5 minutes after it is turned on,  
to prevent a cold air from blowing in.)  
Turn off power  
supply once, and  
turn it on again.  
Is it possible to detect  
DC 1V or more between  
5e and 3d of  
YES  
NO  
Does fan motor  
continue to operate?  
Peplace indoor  
fan motor.  
motor connector (CN10).  
NO  
YES  
Start to operate  
indoor unit in cooling  
operation at airflow  
level LOW .  
Is it possible to detect  
DC 310−340 V between  
1e and 3d of motor  
connector (CN10).  
NO  
NO  
Does indoor  
fan operate?  
YES  
YES  
Turn off indoor unit and remove  
connector from motor.  
Then push START/STOP button  
on remote control to stop  
(Motor connection condition)  
NO  
Is it possible to detect DC 15 V  
between 4e and 3d of  
motor connector (CN10).  
flashing lamp on indoor unit.  
YES  
Is it possible to detect  
DC 15 V between  
4e and 3d of motor  
connector (CN10).  
NO  
Peplace main  
P.C. board.  
Change airflow level  
to HIGH .  
YES  
Start to operate the  
indoor unit in except  
heating operation.  
Turn off indoor unit and  
remove connector from motor.  
Then start to operate indoor  
unit with remote control.  
NO  
At this time, is it possible to  
detect DC 1V or more between  
5e and 3d of motor  
connector (CN10)?  
YES  
Start to operate the  
indoor unit in except  
heating operation.  
At this time, is it possible  
to detect DC 1V or more  
between 5e and 3d  
of motor connector (CN10)?  
(Check this condition  
within 15 seconds after  
starting unit.)  
Is it possible to  
change airflow level  
to HIGH ?  
NO  
NO  
YES  
YES  
Is it possible to  
rotate cross-flow fan by  
hand properly?  
NO  
NO  
Peplace  
bearing.  
YES  
Turn off indoor unit  
and rotate cross-flow  
fan by hand when the  
unit is on standby.  
At this time, is it possible  
to detect DC 1V or more  
between 5e and 3d  
of motor connector  
(CN10).  
Fan motor  
operates normally.  
YES  
– 60 –  
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FILE NO. SVM-03008  
(4) Indoor fan motor automatically starts to rotate by turning on power supply.  
<Cause>  
The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor.  
If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning  
on power supply.  
<Inspection procedure>  
(1) Remove the front panel. (Remove 4 screws.)  
(2) Remove the cover of the fan motor lead wires.  
(3) Check DC voltage with CN10 connector while the fan motor is rotating.  
NOTE:  
• Do not disconnect the connector while the fan motor is rotating.  
• Use a thin test rod.  
Indoor fan starts rotating when power supply is turned on.  
P.C. board  
(Check output DC voltage of fan motor on P.C. board.)  
CN10  
6 (Blue)  
Measure voltage between 2 (GND:BLACK)  
and 3 (V line:YELLOW) of motor connector  
(CN10) while indoor fan motor is rotating.  
Yellow  
Black  
5 (Yellow)  
4 (White)  
3 (Black)  
2 —  
1 (Red)  
DC 1.0 V or more  
Under DC 1.0 V  
DC  
P.C. board is defective.  
Replace P.C. board.  
Motor is defective.  
Replace motor.  
– 61 –  
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FILE NO. SVM-03008  
(5) Troubleshooting for remote control  
The unit does not beep at all.  
OPERATION lamp on  
indoor unit is not indicated.  
Press START/STOP  
button.  
NO  
Is transmission  
mark indicated?  
YES  
Press RESET button  
on remote control  
with tip of pencil.  
Is receiver on  
NO  
indoor unit exposed  
to direct sunlight?  
YES  
Does indoor unit  
operate when  
moving remote control  
near receiver or  
indoor unit?  
Is there any  
thyristor fluorescent  
light nearby?  
NO  
NO  
YES  
Press START/STOP  
button.  
YES  
Batteries are  
exhausted.  
Does indoor unit  
NO  
NO  
Is transmission mark  
indicated?  
start to operate by  
automatic restart  
function?  
YES  
YES  
NO  
Does indoor unit  
beep and operate?  
YES  
Does radio sound  
is affected by  
remote control when  
a signal is transmitted  
at distance of 5 cm  
from radio?  
NO  
YES  
Remote control  
is defective.  
P.C. board is  
defective.  
Avoid direct  
sunlight.  
Keep indoor unit  
away from  
Replace  
batteries.  
Normal  
operation  
Replace  
remote control.  
Replace  
P.C. board.  
thyristor  
fluorescent light.  
Note : After replacing batteries,  
press the RESET button  
with a tip of a pencil.  
– 62 –  
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FILE NO. SVM-03008  
10-5-2. Wiring Failure (Interconnecting and serial signal wire)  
(1) Outdoor unit does not operate.  
1) Is the voltage between indoor terminal block 2 and 3 varied?  
Confirm that transmission from indoor to outdoor is correctly performed based on the following diagram.  
NOTE:  
• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.  
• Be sure to prepare a diode for judgment.  
Terminal block on indoor side  
Red  
3
2
1
S5277G or equivalent (G or J type)  
(Diode with rated voltage of 400 V  
or more is acceptable.)  
S5277G  
White  
Tester  
Terminal block  
Normal time  
: Voltage swings between DC15 V and 60 V.  
Abnormal time : Voltage does not vary.  
(2) Outdoor unit stops in a little while after operation started.  
<Check procedure> Select phenomena described below.  
1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are  
required to restart the unit.  
Gas shortage  
Gas leak  
Gas circulation amount is down.  
Measure gas pressure.  
Pipe clogging  
Thermo operation of compressor  
2) If the unit stops once, it dose not operate until the power will be turned on again.  
To item of compressor does not operate.  
3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed.  
(Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)  
Gas leak  
P.M.V. is defective.  
Refer to the chart in 10-6.  
Miswiring of connecting wires of indoor/outdoor units  
Clogging of pipe and coming-off TC sensor  
– 63 –  
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FILE NO. SVM-03008  
10-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E  
<Check procedure>  
1C  
1E  
Gas leakage,  
Discharge temp. error,  
gas leakage  
(Check code 03, 1E)  
disconnection of TS/TC  
sensors (Check code 02, 1C)  
Valve drive check  
NO  
NO  
Is coil of the pulse modulation valve  
(P.M.V.) correctly set?  
Set it correctly.  
Set it correctly.  
YES  
Is connector of coil connected to inverter?  
YES  
Is positioning sound of valve (sound hitting to stopper) heard from valve  
when the air conditioner starts the operation after turning off power of the  
air conditioner once?  
NOTE :  
After all the operations stopped by the remote control, the power keeps  
being supplied to outdoor unit for approx. 3 minutes. If operating the air  
conditioner by remote control again just after all the operations stopped by the  
remote control, positioning of the valve is not performed when outdoor unit  
is activated because supplying power to the outdoor unit is not interrupted.  
After positioning of the valve, activate the compressor and the outdoor fan.  
It takes approx. 7 seconds for positioning of the valve, and sound ticktack  
(hitting sound to stopper) is heard for approx. 0.5 seconds at least of that  
period. As the sound is low, check sound by using screwdriver, etc.  
NO  
Replace coil valve.  
YES  
Are temp. sensors of indoor/outdoor units correctly set to the holder?  
NOTE :  
The temperature sensors which are used to control electronic control valve  
include indoor heat exchanger sensor (TC), outdoor heat exchanger temp.  
sensor (TE), and outdoor suction temp. sensor (TS).  
NO  
Set it correctly.  
YES  
Gas amount check and valve clogging check  
Remove TC sensor connector from the P.C. board in indoor unit.(Remove connector from the P.C. board.)  
Operate the air conditioner in COOL mode by TEMP button ( Pi sound is heard if keeping pushed for 10 seconds.).  
The operation enters temporary operation mode which fixes opening degree of P.M.V. and No. of revolution of  
compressor. Check condensation at outlet of P.M.V., and then check operating pressure from the service port.  
Existence of condensation at outlet of P.M.V.  
YES  
Replace valve.  
Add gas.  
If there is condensation at outlet (1/4 inch=∅6.35mm valve side),  
the valve is clogged.  
Check the operating pressure from service port, and add gas if pressure is low.  
– 64 –  
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FILE NO. SVM-03008  
10-7. How to Diagnose Trouble in Outdoor Unit  
10-7-1. Summarized inner diagnosis of inverter assembly  
Table 10-7-1  
Diagnosis/Process flowchart  
Item  
Contents  
Summary  
Preparation  
Turn “OFF” the power  
breaker, and remove 3P  
connector which connects  
inverter and compressor.  
• Check whether 25 A fuse  
on the control board  
assembly is blown or not.  
(F01)  
Remove  
connector of  
compressor.  
Check  
Check  
If fuse was blown,  
NG  
be sure to check the  
electrolytic capacitor  
and diode block. (DB01)  
• Connect discharge  
resistance (approx.  
Check 15 A fuse  
(Part No.F01).  
OK  
Replace fuse.  
100Ω40W) or soldering  
iron (plug) between +, –  
terminals of the electrolytic  
capacitor (500µF)  
of C14 (with printed  
CAUTION HIGH VOLT-  
AGE) on P.C. board.  
Check  
electrolytic  
capacitor,  
diode block  
(DB01), etc.  
Discharging position  
(Discharging period  
10 seconds or more)  
Plug of  
soldering  
iron  
Check  
NG  
terminal voltage  
of electrolytic  
capacitor.  
Check  
electrolytic  
capacitor,  
diode  
OK  
(DB01), etc.  
Operation  
Turn on power breaker, and  
operate the air conditioner in  
COOL mode by short-circuit  
of the timer.  
NO  
Does outdoor  
fan rotate?  
YES  
Measurement Measure terminal voltage of  
electrolytic capacity.  
YES  
Does LED on control  
board flash or go on?  
OK if 500µF →  
DC280 to 380 V  
500µF: 400WV x 3  
NO  
Check  
Stop  
Remove CN300 by pushing  
the part an arrow because  
CN01 is a connector with  
lock.  
After operation, turn off the  
power breaker after 2  
minutes 20 seconds passed,  
and discharge the electrolytic  
capacity by soldering iron.  
Check voltage between  
motor phases.  
Remove connector  
CN300 of outdoor  
fan motor, and using  
a tester, check  
resistance value  
between every phase  
at motor side  
NG  
Check  
Measurement  
• Is not winding  
between 1-2, 2-3, or  
1-3 opened or  
OK  
Replace  
outdoor  
fan motor.  
short-circuited?  
• Is not frame grounded with  
1, 2 or 3?  
→ Resistance between  
phases should be approx.  
55 to 77Ω.  
A
B
C
→ Should be 10MΩ or  
more.  
– 65 –  
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FILE NO. SVM-03008  
Diagnosis/Process flowchart  
Item  
Contents  
Summary  
Check  
Check winding resistance  
between phases of  
A
B
C
compressor, and resistance  
between outdoor frames by  
using a tester.  
• Is not grounded.  
• Is not short-circuited  
between windings.  
Check  
NG  
→ OK if 10MΩ or more →  
winding of  
compressor.  
OK if 0.51Ω → 0.57Ω  
(Check by a digital tester.)  
}
OK  
• Winding is not opened.  
Check  
fan motor  
position  
detect  
Replace  
com-  
NG  
Operation  
Remove connector CN300 of  
the outdoor fan motor, turn on  
the power breaker, and  
perform the operation. (Stops  
though activation is  
pressor.  
signal.  
OK  
Replace  
outdoor  
fan  
prompted.)  
Check operation within 2  
minutes 20 seconds after  
activation stopped.  
motor.  
<Output check of fan motor a) One or two of three  
Replace control  
board assembly.  
position detect signal>  
While connecting connector  
5P (CN301) for position  
detection, using a tester,  
measure voltage between  
1-5. Between 5-4 : 5 V  
voltages should be 5 V,  
and others should be 0V.  
(When all are 0V or 5 V,  
it is not accepted.)  
Check  
compressor  
winding  
b) When rotating the fan  
slowly with hands, the  
voltage between pins  
should move from 0V to 5 V.  
(Check it with an analog  
tester.)  
NG  
resistance.  
OK  
Replace  
control board.  
Replace  
compressor.  
(2) Inspection procedures  
10-8. How to Check Simply the Main Parts  
1) When a P.C. board is judged to be defective,  
check for disconnection, burning, or discolora-  
tion of the copper foil pattern or this P.C. board.  
2) The P.C. board consists of the following 2 parts  
a. Main P.C. board part:  
10-8-1. How to check the P.C. board (Indoor unit)  
(1) Operating precautions  
1) When removing the front panel or the P.C.  
board, be sure to shut off the power supply  
breaker.  
2) When removing the P.C. board, hold the edge  
of the P.C. board and do not apply force to the  
parts.  
3) When connecting or disconnecting the connec-  
tors on the P.C. board, hold the whole housing.  
Do not pull at the lead wire.  
DC power supply circuit (5 V, 12 V, 15 V),  
Indoor fan motor control circuit, CPU and  
peripheral circuits, buzzer, and Driving circuit  
of louver.  
b. Indication unit of infrared ray receiving  
Infrared ray receiving circuit, LED:  
To check defect of the P.C. board, follow the  
procedure described below.  
– 66 –  
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FILE NO. SVM-03008  
(3) Check procedures  
Table 10-8-1  
No.  
Procedure  
Check points (Symptom)  
Causes  
1
Turn off the power supply and  
remove the P.C. board assembly  
from electronic parts base. Remove  
the connecting cables from the  
terminal block.  
Check whether or not the fuse (F01)  
is blown.  
Impulse voltage was applied or the  
indoor fan motor short-circuited.  
2
Remove the connector of the motor Check power supply voltage :  
1. The terminal block or the cross-  
over cable is connected wrongly.  
2. The capacitor (C01), line filter  
(L01), resistor (R01), or the diode  
(DB01) is defective.  
3. IC01, IC02 and T01 are defective.  
4. IC01, IC02 and T01 are defective.  
5. IC01, IC02, IC07 and T01 are  
defective.  
and turn on the power supply. If  
OPERATION lamp flashes (once  
per second), it is not necessary to  
check steps (1 to 3) in the right  
next column.  
1. Between TP2 and TP3  
(AC 220-240 V)  
2. Between e and d (DC 310-340 V)  
3. Between d of C10 and output side  
of IC08 (DC 15 V)  
4. Between 12 V and GND  
5. Between 5 V and GND  
3
4
Push [START/STOP] button once to Check power supply voltage :  
start the unit. (Do not set the mode 1. Between CN23 and CN24  
<Heating and cooling model>  
IC03 and IC04 are defective.  
to Fan Only or On-Timer operation.)  
(DC 15-60 V)  
Shorten the line of the restart delay Check whether or not all lamps  
The lamps are defective or the  
housing assembly (CN13) is  
defective.  
timer and start unit.  
(OPERATION, TIMER, PRE. DEF,  
FILTER and Hi POWER) are  
indicated for 3 seconds and they  
return to normal 3 seconds later.  
5
Push [START/STOP] button once to 1. Check whether or not the  
1. The temperature of the indoor  
heat exchanger is extremely low.  
2. The connection of the heat  
exchanger sensor is loose.  
(The connector is disconnected.)  
(CN01)  
3. The heat exchanger sensor and  
the P.C. board are defective.  
(Refer to Table 10-4-1.)  
start the unit.  
• Shorten the time of the restart  
delay timer.  
compressor operates.  
2. Check whether or not the  
OPERATION lamp flashes.  
• Set the operation mode to COOL.  
• Set the fan speed level to AUTO.  
• Set the preset temperature much  
lower than the room temperature.  
(The unit (compressor) operates  
continuously in the above  
condition.)  
4. The main P.C. board is defective.  
6
If the above condition (No. 5) still  
continues, start the unit in the  
following condition.  
1. Check whether or not the  
compressor operates.  
1. The temperature of the indoor  
heat exchanger is extremely high.  
2. Check whether or not the OPERA- 2. The connection of the heat  
• Set the operation mode to HEAT.  
• Set the preset temperature much  
higher than room temperature.  
TION lamp flashes.  
exchanger sensor short-circuited.  
(CN01)  
3. The heat exchanger sensor and  
the P.C. board are defective.  
(Refer to Table 10-4-1.)  
4. The main P.C. board is defective.  
7
Connect the motor connector to the 1. Check it is impossible to detect the 1. The indoor fan motor is defective  
motor and turn on the power supply.  
Start the unit the following condition  
• Set the operation mode to FAN.  
• Set the fan speed level to HIGH.  
(The unit (compressor) operates  
continuously in the above  
voltage (DC 15 V) between 3 and 4  
of the motor terminals.  
(Protected operation of P.C.  
board.)  
2. The motor does not operate. (But it 2. The connection or the motor  
is possible to receive the signal  
from the remote control.)  
3. The motor rotates but vibrates  
strongly.  
connector is loose.  
3. The P.C. board is defective.  
condition.)  
– 67 –  
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FILE NO. SVM-03008  
10-8-2. P.C. board layout  
GND  
+12V  
+5V  
Bottom View  
(For the Top View, refer to page 65.)  
[1] Sensor characteristic table  
100  
90  
80  
TD  
70  
60  
50  
40  
TD : Discharge temp. sensor  
TA : Room temp. sensor  
TC : Heat exchanger temp. sensor  
TO : Outdoor temp. sensor  
TE : Outdoor heat exchanger temp. sensor  
TS : Suction temp. sensor  
30  
20  
TA, TC, TO, TE, TS  
10  
0
0
10  
20  
30  
40  
50  
Temperature (°C)  
– 68 –  
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FILE NO. SVM-03008  
10-8-3. Indoor unit (Other parts)  
No.  
Part name  
Checking procedure  
1
Room temp. (TA) sensor  
Heat exchanger (TC) sensor  
Disconnect the connector and measure the resistance value with tester.  
(Normal temp.)  
Temperature  
10°C  
20°C  
25°C  
30°C  
40°C  
Sensor  
TA, TC (kΩ)  
20.7  
12.6  
10.0  
7.9  
4.5  
2
3
Remote control  
To item of How to judge whether remote control is good or bad of the Judgment  
of trouble by symptom.  
Louver motor  
MP24GA  
Measure the resistance value of each winding coil by using the tester.  
(Under normal temp. 25°C)  
Position  
Resistance value  
1 to 2  
1 to 3  
1 to 4  
1 to 5  
380±40Ω  
4
Indoor fan motor  
Since judgment of DC motor is difficult on the single motor, refer to 10-5-1. (3)  
10-8-4. Outdoor unit  
No.  
Part name  
Checking procedure  
1
Compressor  
(Model : DA91A1F-45F)  
Measure the resistance value of each winding by using the tester.  
Red  
Position  
Red - White  
White - Black  
Black - Red  
Resistance value  
0.51 to 0.57Ω  
White  
Black  
Under 20°C  
2
Outdoor fan motor  
Measure the resistance value of winding by using the tester.  
(Model : ICF-140-43-1)  
Position  
Resistance value  
5 to 20kΩ  
Yellow - Pink  
For details, refer to Section 10-9.  
3
4
Compressor thermo. Bimetal type Check conduction by using the tester.  
(Model : US-622KXTMQO-SS)  
Outdoor temperature sensor  
(TO), discharge temperature  
sensor (TD), suction temperature  
sensor (TS), outdoor heat  
exchanger temperature sensor  
(TE)  
Disconnect the connector, and measure resistance value with the tester.  
(Normal temperature)  
Temperature  
10°C  
20°C  
30°C  
40°C  
50°C  
Sensor  
TA, TC (kΩ)  
105  
64  
41  
27  
18  
TGa : Heat pump model only.  
TO, TS, TE : Refer to the TA, TC characteristic table in Indoor  
(Refer to Table 10-8-3, No.1).  
– 69 –  
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FILE NO. SVM-03008  
10-8-5. Checking Method for Each Part  
No.  
Part name  
Checking procedure  
1
Electrolytic capacitor  
(For raising pressure, smoothing)  
1. Turn OFF the power supply breaker.  
2. Discharge all three capacitors completely.  
3. Check that safety valve at the bottom of capacitor is not broken.  
4. Check that vessel is not swollen or exploded.  
5. Check that electrolytic liquid does not blow off.  
6. Check that the normal charging characteristics are show in  
continuity test by the tester.  
Case that product is good  
Pointer swings once, and  
returns slowly. When  
performing test once again  
under another polarity, the  
pointer should return.  
C12, C13, C14 → 500µF/400V  
2
Converter module  
1. Turn OFF the power supply breaker.  
2. Discharge all four capacitors completely.  
3 Check that the normal rectification characteristics are shown in continuity  
test by the tester.  
−
−
Diode check  
IGBT check  
Tester rod  
Tester rod  
Resistance value  
in good product  
Resistance value  
in good product  
−
−
−
Ω
Ω
Ω
Ω
– 70 –  
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FILE NO. SVM-03008  
10-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad  
1. Symptom  
• Outdoor fan motor does not rotate.  
• Outdoor fan motor stops within several ten seconds though it starts rotating.  
• Outdoor fan motor rotates or does not rotate according to the position where the fan stopped., etc.  
Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”  
2. Cause  
The following causes are considered when the outdoor fan motor does not normally rotate.  
1) Mechanical lock of the outdoor fan motor  
2) Winding failure of the outdoor fan motor  
3) Position-detect circuit failure inside of the outdoor fan motor  
or  
4) Motor drive circuit failure of the outdoor P.C. board  
3. How to simply judge whether outdoor fan motor is good or bad  
Turn OFF the breaker.  
Disconnect two connectors (CN300 and CN301)  
of the outdoor fan motor from the inverter.  
NO  
Does the fan rotate without trouble  
when rotating it with hands?  
YES  
CN300  
If the resistance value between  
1 (Red lead)  
2 (White lead)  
3 (Black lead)  
− 2 (White lead)  
− 3 (Black lead)  
− 1 (Red lead)  
NO  
of the connector  
(CN300 : Motor winding)  
is 17 to 25Ω, it is normal.  
YES  
If the resistance value between  
1 (Yellow lead)  
− 4 (Pink lead)  
NO  
CN301  
of the connector  
(CN301 : Motor position detection)  
is 5k to 20kΩ, it is normal.  
YES  
Fan motor is normal.  
Fan motor error  
(Outdoor P.C. board error)  
NOTE :  
However, GND circuit error inside of the motor may be accepted in some cases when the above check is  
performed.  
When the fan motor does not become normal even if P.C. board is replaced, replace the outdoor fan motor.  
– 71 –  
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FILE NO. SVM-03008  
11. HOW TO REPLACE THE MAIN PARTS  
11-1. Indoor Unit  
No.  
Part name  
Procedures  
Remarks  
1
Front panel  
How to remove the front panel  
2
1) Stop operation of the air conditioner and turn off  
its main power supply.  
2
2
2) Pull the air inlet grille toward you to open it and  
remove the air inlet grille.  
Then remove the 4 screws fixing the front panel.  
3) Open the horizontal louver, and then remove the  
front panel from the back body by pulling it  
toward you.  
2 4-Screws  
3
How to mount the front panel  
Mount the front panel in position and make sure  
all hooks are locked.  
2
Electrical part  
How to remove the electrical part.  
1) Remove the front panel with the procedure 1.  
2) Remove the screw holding the electrical part  
cover.  
2 Screws  
3) Remove the drain guide.  
4) Disconnect the connector (6P) for the fan motor  
and the connector (5P) for the louver motor from  
the P.C. board assembly.  
3 Drain guide  
5) Pull out the TC sensor from the sensor holder.  
6) Remove each screw for the ground wire, the  
electrical part box and the LED unit. Then  
remove the LED unit and the electrical part box  
from the main unit.  
5 TC Sensor  
How to mount the electrical part.  
1) Fix the electrical part box by the upper hook of  
the back body.  
2) Tighten 2 screws on the electrical part box.  
3) Connect the 2 connectors and arrange the  
wiring same as original condition and then  
tighten the screw to fix the LED unit to the back  
body.  
6 Screws  
4
2-Connectors  
4) Attach the TC sensor to the holder.  
5) Tighten the screw for the ground wire.  
6) Mount the drain guide (the TC sensor wire  
should be covered with the drain guide).  
7) Tighten the screw of the electrical part cover.  
6 2-Screws  
3
Horizontal louver  
1) Remove the front panel and the electrical part  
with the procedure 2.  
2) Remove the center shaft of the horizontal louver  
from the back body.  
3) Remove the left shaft from the back body.  
4) Remove the horizontal louver from the back  
body.  
3 Left shaft  
2 Center shaft  
– 72 –  
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FILE NO. SVM-03008  
No.  
Part name  
Procedures  
Remarks  
4
Heat exchanger  
1) Remove the front panel, electrical part and the  
horizontal louver with the procedure 3.  
2) Remove the pipe holder on the rear side of the  
main unit.  
3) Remove 2 screws of the heat exchanger on the  
base bearing side.  
4) Remove 2 screws of the heat exchanger on the  
left side (upper and lower) from the back body,  
and then pull out the upper side of the heat  
exchanger slowly.  
2 Pipe holder  
3 2-Screws  
4 2-Screws  
5
Fan motor  
1) Remove the front panel and the electrical part  
with the procedure 2.  
Mounting the fan motor as shown in  
figure below.  
2) Loosen the set screw of the cross flow fan.  
3) Remove 2 screws fixing the motor band (R).  
4) Pull out the fan motor.  
Connector cover  
Reference  
line  
Pull out the lead  
wires of the fan motor  
from this hole.  
Reference line  
When mouting the fan motor,  
put the R end of the connector  
cover this reference line.  
– 73 –  
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FILE NO. SVM-03008  
No.  
Part name  
Procedures  
Remarks  
1) Remove the front panel, electrical part,  
horizontal louver and the heat exchanger with  
the procedure 4.  
6
Cross flow fan  
2 2-Screws (R)  
2) Remove 2 screws of the band motor (L) and  
other 2 screws of the band motor (R) and then  
remove the cross flow fan.  
3) Loosen the set screw of the cross flow fan then  
disconnect the fan and the fan motor.  
2 2-Screws (L)  
Notice  
4.5 mm  
For position of the fan motor connector and  
drawing out of the lead cables, refer to the  
procedure 5.  
Fix the cross flow fan with the set screw at the  
position where the gap between the back body and  
the right surface of the cross flow fan is 4.5 mm.  
3 Set screws  
1) Remove the front panel, electrical part,  
horizontal louver, heat exchanger and the cross  
flow fan with the procedure 5 and 6 .  
2) Remove the 2 screws fixing the base bearing.  
3) Remove the bearing from the base bearing.  
If the housing protrudes from the base bearing,  
put the housing in position and attach the  
bearing to the base bearing.  
7
Base bearing  
2 2-Screws  
– 74 –  
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FILE NO. SVM-03008  
11-2. Microcomputer  
No.  
Part name  
Procedures  
Remarks  
1
Common  
procedure  
1) Turn the power supply off to stop the operation  
of air conditioner.  
2) Remove the front panel.  
Replace the thermal fuse, terminal  
block, microcomputer ass’y and the  
P.C. board ass’y  
• Remove the 4 fixing screws.  
3) Remove the electrical part base.  
<P.C. board layout>  
R04  
CN10  
Fuse  
C01  
CN13  
RY01  
DB01  
L01  
IC03  
IC02  
CN04  
R05  
C03  
Top View  
T01  
IC01  
C02  
R01  
– 75 –  
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FILE NO. SVM-03008  
11-3. Outdoor Unit  
No.  
Part name  
Procedures  
Remarks  
1. Detachment  
1
Common  
procedure  
Upper cabinet  
Wiring cover  
1) Stop operation of the air conditioner, and turn off  
the main switch of the breaker for the air  
conditioner.  
2) Remove the valve cover. (ST1T∅4 x 10s 1 pc.)  
• After removing screw, remove the valve cover  
pulling it downward.  
Valve cover  
3) Remove wiring cover (ST1T∅4 x 10s 2 pcs.),  
and then remove connecting cable.  
4) Remove the upper cabinet.  
(ST1T∅4 x 10s 2 pcs.)  
• After removing screws, remove the upper  
cabinet pulling it upward.  
2. Attachment  
1) Attach the upper cabinet.  
(ST1T∅4 x 10s 2 pcs.)  
• Hook the rear side of the upper cabinet to  
claw of the rear cabinet, and then put it on the  
front cabinet.  
2) Perform cabling of connecting cable, and attach  
the wiring cover.  
• Insert the upper part into the upper cabinet,  
insert claw which has been hooked to the  
lower part into the square hole, and then fix it  
with screw. (ST1T∅4 x 10s 1 pc.)  
3) Attach the valve cover. (ST1T∅4 x 10s 1 pc.)  
• Insert the upper part to the upper cabinet,  
set hook claw of the valve cover to square  
holes (at three positions) of the main unit,  
and attach it pushing upward.  
2
Front cabinet  
1. Detachment  
1) Perform work of item 1 of 1.  
2) Remove screw (ST1T∅4 x 10s 2 pc.) of the  
front cabinet and inverter cover and screws  
(ST1T∅4 x 10s 3 pcs.) of the front cabinet and  
lower part.  
• The left side of the front is made to insert to  
the rear cabinet, so remove it pulling upward.  
2. Attachment  
1) Insert claw at the left side of the front into the  
rear cabinet.  
Claw  
2) Hook the lower part at the right side of the front  
to concave part of the bottom plate. Insert claw  
of the rear cabinet into square hole of the front  
cabinet.  
Square hole  
3) Attach the removed screws to the original  
positions.  
Concave section  
– 76 –  
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FILE NO. SVM-03008  
No.  
Part name  
Procedures  
Remarks  
3
Inverter  
assembly  
1) Perform work of item 1 of 1.  
2) Remove screw (ST1T∅4 x 10s 2 pc.) of the  
upper part of the front cabinet.  
Inverter cover  
P. C. board  
(Soldered surface)  
• If removing the inverter cover in this condition,  
P.C. board can be checked.  
• If there is no space in the upper part of the  
upper cabinet, perform work of 2.  
Be careful to check the inverter because  
high-voltage circuit is incorporated in it.  
3) Perform discharging by connecting e, d  
polarity by discharging resistance (approx.  
100Ω40W) or plug of soldering iron to e, d  
terminals of the C14 (printed “CAUTION HIGH  
VOLTAGE” is attached.) electrolytic capacitor  
(500 µF) on P.C. board.  
Plug of  
soldering  
iron  
Discharging position  
(Discharging period  
10 seconds or more)  
Be careful to discharge the capacitor  
because the electrolytic capacitor cannot  
naturally discharge and voltage remains  
according to trouble type in some cases.  
NOTE :  
This capacitor is one with mass capacity.  
Therefore, it is dangerous that a large  
spark generates if short-circuiting  
between the e,d polarity with screw-  
driver, etc. for discharging.  
Bundled  
part  
4) Remove screw (ST1T∅4 x 10s 2 pc.) fixing the  
main body and the inverter box.  
5) Remove various lead wires from the holder at  
upper part of the inverter box and wiring holder  
at right side of the terminal block.  
Holder  
6) Remove the lead wire from the bundled part at  
left side of the terminal block.  
Terminal block  
7) Pull the inverter box upward.  
8) Disconnect connectors of various lead wires.  
The connector is one  
Requirement :  
with lock, so remove it  
while pushing the part  
indicated by an arrow.  
As each connector has a lock  
mechanism, avoid to remove the  
connector by holding the lead wire,  
but by holding the connector.  
Be sure to remove the connector by  
holding the connector, not by pulling  
the lead wire.  
– 77 –  
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FILE NO. SVM-03008  
No.  
Part name  
Procedures  
Remarks  
4
Control board  
assembly  
1) Disconnect lead wires and connectors  
connected from the control board  
assembly to other parts.  
CN701  
CN703 CN602  
CN301  
CN300  
CN500  
1. Lead wires  
CN603  
• Connection with terminal block :  
3 wires (Black, White, Orange)  
• Connection with compressor :  
Remove the connector (3P)  
CN601  
CN600  
• Connection with reactor :  
CN300, CN301 and CN701, etc. at the  
control board assembly side are  
connectors with locks. Therefore,  
remove the connector while pushing  
the part indicated by an arrow.  
Remove the relay connectors from P07, 08  
(2P, White) and P12, 13 (2P, Yellow).  
2. Connectors  
CN300 : Outdoor fan (3P, White)  
CN301 : Outdoor fan position detection  
(5P, White)  
CN701 : 4-way valve (3P, Yellow)  
CN600 : TE sensor (2P, White)  
CN601 : TD sensor (3P, White)  
CN603 : TS sensor (3P, White)  
CN602 : TO sensor (2P, White)  
CN500 : Case thermo. (2P, White)  
CN703 : Pulse modulating valve  
(6P, White)  
2) Remove the control board assembly from  
P.C. board base.  
1. Main control board assembly side  
• Remove two claws of P.C. board base, and  
remove upward the heat sink with hands.  
• Remove three screws fixing the heat sink  
and main control board assembly side, and  
replace the board with a new one.  
P.C. board base  
P.C. board  
When mounting a new board, check  
that the board is correctly set in the  
groove of base holder of P.C. board  
base.  
5
Rear cabinet  
1) Perform work of item 1 of 1, 1 and 2, 3.  
2) Remove fixed screws fixing to the bottom plate.  
(ST1T∅4 x 10s 3 pcs.)  
Reactor  
3) Remove fixed screws fixing to the heat  
exchanger. (ST1T∅4 x 10s 2 pcs.)  
4) Remove fixed screw fixing to the valve mounting  
plate. (ST1T∅4 x 10s 1 pc.)  
– 78 –  
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FILE NO. SVM-03008  
No.  
Part name  
Procedures  
Remarks  
6
Fan motor  
1) Perform work of item 1 of 1 and 2.  
2) Remove the flange nut fixing the fan motor and  
the propeller fan.  
Fan motor  
Propeller fan  
• Flange nut is loosened by turning clockwise.  
(To tighten the flange nut, turn counterclock-  
wise.)  
3) Remove the propeller fan.  
4) Disconnect the connector for fan motor from the  
inverter.  
5) Remove the fixing screws (3 pcs.) holding by  
hand so that the fan motor does not fall.  
Flange nut  
7
Compressor  
1) Perform work of item 1 of 1 and 2, 3, 4, 5.  
2) Extract refrigerant gas.  
3) Remove the partition board.  
(ST1T∅4 x 10s 2 pcs.)  
4) Remove the sound-insulation material.  
5) Remove the terminal cover of the  
compressor, and disconnect lead wire of the  
compressor thermo. and the compressor from  
the terminal.  
Valve  
clamping  
plate  
Partition  
board  
6) Remove pipe connected to the compressor with  
a burner.  
7) Remove the fixing screw of the bottom plate  
and heat exchanger.  
Compressor  
thermo.  
(ST1T∅4 x 10s 2 pc.)  
8) Remove the fixing screw of the bottom plate  
and valve clamping plate.  
Compressor  
(ST1T∅4 x 10s 2 pcs.)  
9) Pull upward the refrigeration cycle.  
10) Remove the nut fixing the compressor to the  
bottom plate.  
8
Reactor  
1) Perform work of item 1 of 1 and 3.  
2) Remove lead wires clung in holder on the  
partition board.  
Reactor  
3) Remove the screw fixing the reactor.  
(ST1T∅4 x 10s 2 pcs.)  
– 79 –  
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FILE NO. SVM-03008  
No.  
Part name  
Procedures  
Remarks  
9
Pulse modulating  
valve coil  
1. Detachment  
1) Perform work of item 1 of 1, and 2, 3, 5.  
2) Turn the coil clockwise (counterclockwise) by  
90 degrees, and remove coil from the pulse  
modulating valve.  
Take-out part  
of lead wire  
2. Attachment  
1) Set take-out part of the lead wire of coil to the  
coil inserting position of the pulse modulating  
valve, and attach the coil.  
2) Turn the coil by 90 degrees, set surely the  
concave part at lower part of the coil to the  
positioning hole of the pulse modulating valve,  
and then fix the coil.  
Notch  
Coil fix  
position  
Coil inserting  
position  
The pulse modulating valve has A room  
side and B room side. After mounting it,  
check that coil at B room side (Red  
marking is marked on the pulse modulat-  
ing valve.) is connected to CN13 of the  
control board assembly.  
Coil inserting  
position  
Positioning  
hole  
!
Fan guard  
1. Detachment  
1) Perform work of item 1 of 1, and 2.  
2) Remove the front cabinet, and put it down so  
that fan guard side directs downward.  
Perform work on a corrugated cardboard,  
cloth, etc. to prevent flaw to the product.  
3) Remove the hooking claws by pushing minus  
screwdriver according to the arrow mark in the  
right figure, and remove the fan guard.  
Minus screwdriver  
Hooking claw  
2. Attachment  
1) Insert claw of the fan guard in the hole of the  
front cabinet. Push the hooking claws  
(10 positions) by hands and fix the claws.  
All the attaching works have completed.  
Check that all the hooking claws are fixed  
to the specified positions.  
– 80 –  
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FILE NO. SVM-03008  
No.  
Part name  
Procedures  
Remarks  
"
Replacement of  
temperature  
sensor for  
1) Cut the sensor 100 mm longer than old one.  
2) Cut the protective tube after pulling out it  
(200 mm).  
Cutting here  
100  
Thermal  
sensor part  
Connector  
servicing only  
3) Move the protective tube toward the thermal  
sensor side and tear the tip of lead wire in two,  
then strip the covering part.  
Cutting here  
200  
4) Pass the stripped part through the thermal  
constringent tube.  
5) Cut the old sensor 100 mm length on the  
connector side, and recycle that connector.  
6) Tear the lead wire in two on the connector side  
and strip and covering part.  
Common service  
parts of sensor  
TO, TS, TE, TD  
Thermal  
constringent tube  
7) Twist the leads on the connector and sensor  
sides, and solder them.  
8) Move the thermal constringent tubes toward  
the soldered parts and heat them with the  
dryer and constring them.  
Cutting here  
100  
9) Wind the attached color tape round the both  
terminals of the protective tube when colored  
protective tube is used.  
10) Fix the sensor again.  
Soldered part  
NOTES:  
1) Store the joint part of the sensor and the  
connector in the electric parts box.  
2) Never joint them near the thermal sensor part.  
Otherwise, it would cause insulation inferiority  
because of dew drops.  
3) When replacing the sensor using the colored  
protective tube, wind the color tape matching  
the color of that tube.  
Dryer  
Winding the color tape  
These are parts for  
servicing sensors.  
Part name  
Q’ty  
Remarks  
1
2
3
4
5
6
Sensor  
1
1
1
3
1
3
Length: 3 m  
Please check that  
the accessories  
shown in the right  
table are packed.  
Sensor Spring (A)  
Sensor Spring (B)  
Thermal constringent tube  
Color tape  
For spare  
For spare  
Including one spare  
9 colors  
Terminal  
– 81 –  
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FILE NO. SVM-03008  
<P.C. board layout>  
MCC-813  
– 82 –  
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FILE NO. SVM-03008  
12. EXPLODED VIEWS AND PARTS LIST  
12-1. Indoor Unit (E-Parts Assy)  
405  
406  
403  
402  
404  
401  
Location  
No.  
Part  
No.  
Location  
No.  
Part  
No.  
Description  
Description  
401  
402  
403  
43T69319 Temperature Sensor, TC 10kΩ 25°C  
43T60001 Terminal, 2P AC300V, 20A  
404  
405  
406  
43T62003 Cord Clamp  
43169079 P.C. Board ASSY, WRS-LED  
43T69322 P.C. Board, MCC-867  
43T69320 Temperature Sensor, TA 10kΩ 25°C  
– 83 –  
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FILE NO. SVM-03008  
12-2. Indoor Unit  
217  
216  
217  
214  
210  
211  
218  
225  
208  
215  
203  
212  
219  
220  
201  
205  
207  
204  
233  
222  
223  
224  
202  
221  
209  
231  
232  
Electric Parts  
Assembly  
226  
227  
229  
228  
204  
234  
206  
Location  
No.  
Part  
No.  
Location  
No.  
Part  
No.  
Description  
Description  
201  
202  
203  
204  
205  
206  
207  
208  
209  
210  
211  
212  
214  
215  
216  
217  
43T00366 Front Panel Assy  
43T09316 Inlet Grille Assy  
43T03302 Back Body Assy  
43T80301 Air Filter  
218  
219  
220  
221  
222  
223  
224  
225  
226  
227  
228  
229  
231  
232  
233  
234  
43T79302 Guide Drain  
43T22002 Bearing  
43T39301 Base, Bearing  
43T20302 Cross Flow Fan  
43T39302 Band Motor-L  
43T09309 Horizontal Louver  
43T08350 LED Panel Assy  
43T70002 Drain Hose  
43T21327 Motor, Fan, ICF-340-30-2, DC 340V  
43T39303 Band Motor-R  
43T82301 Plate, Installation  
43T69306 Remote Control  
43T83003 Holder Remote Control  
43T85325 Owner’s Manual  
43T62302 Terminal Cover  
43T60317 Cord Motor Louver  
43T60316 Cord Motor Fan  
43T07303 Holder Pipe  
43T79301 Cap Drain  
43T21321 Motor, Louver, MP24GA, DC 12V  
43T44320 Refrigeration Cycle Assy  
43T47006 Pipe, Delivery ∅6.35  
43T47305 Pipe, Suction ∅8.00  
43T11301 Pipe Shield  
43T19302 Holder Sensor  
43T49302 Plate of EVA Seal  
43T49006 Holder, Plate EVA Seal  
43T01003 Mark  
– 84 –  
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FILE NO. SVM-03008  
12-3. Outdoor Unit  
Location  
No.  
Part  
No.  
Location  
No.  
Part  
No.  
Description  
Description  
01  
02  
03  
04  
05  
06  
07  
08  
09  
10  
11  
12  
13  
14  
15  
43T00377 Cabinet, Front, Assy  
43T00381 Cabinet, Back, Assy  
43T42304 Base, Assy  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
43T46326 Body-PMV  
43T63305 Coil-PMV  
43T58303 Reactor  
43T00380 Cabinet, Upper, Assy  
43T09318 Guard, Fan  
43T54304 Thermostat, Bimetal  
43T63005 Holder, Thermostat, Bimetal  
43T20307 Fan, Propeller  
43T21334 Motor, Fan  
43T52310 Cover, Packed Valve  
43T62311 Cover, Wiring, Assy  
43T41336 Compressor  
43T47001 Nut, Flange  
43T43330 Condenser, Assy  
43T46317 Valve, Packed 6.35 Dia.  
43T46320 Valve, Packed 9.52 Dia.  
43T47020 Bonnet, 6.35 Dia.  
43T47021 Bonnet, 9.52 Dia.  
43T03303 Fixing Plate Valve, Assy  
43T47008 Tube, Capillary  
42T47324 Bolt, Compressor (M6)  
43T49308 Cushion, Rubber  
43T46323 Valve, 4-way  
43T63304 Coil, 4-way, Assy  
43T63306 Holder, Sensor  
43T79305 Nipple, Drain  
– 85 –  
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FILE NO. SVM-03008  
12-4. Outdoor Unit (E-Parts Assy)  
701  
704  
702  
706  
TE Sensor (∅6)  
TS Sensor (∅6)  
TO Sensor (∅6)  
707  
TD Sensor (∅4)  
705  
703  
3
2
1
4
3
2
1
Location  
No.  
Part  
No.  
Location  
No.  
Part  
No.  
Description  
Description  
701  
702  
703  
704  
43T62312 Heatsink  
43T69345 P.C. Board  
43T60027 Terminal 6P  
43T60326 Fuse  
705  
706  
707  
43T50305 Temperature Sensor  
43T50304 Temperature Sensor  
43T62313 Base-Plate-P.C.  
– 86 –  
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T O S H IB A C A R R IE R C O R P O R A T IO N  
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