Toshiba Carrier Rav Sp420ut Ul User Manual

AIR CONDITIONER (SPLIT TYPE)  
Owner’s Manual  
Indoor Unit  
Model name:  
4-way Air Discharge Cassette Type  
RAV-SP180UT-UL  
RAV-SP240UT-UL  
RAV-SP300UT-UL  
RAV-SP360UT-UL  
RAV-SP420UT-UL  
Owner’s Manual  
Air conditioner (Split type)  
English  
1
Manuel du proprietaire  
Climatiseur (Type à deux éléments) 27  
Français  
Owner’s Manual  
4-way Air Discharge Cassette Type  
1. PRECAUTIONS FOR SAFETY  
WARNING  
WARNINGS ABOUT INSTALLATION  
• Make sure to ask the qualified installation professional in electric work to install the  
air conditioner.  
If the air conditioner is inappropriate installed by yourself, it may cause water leak,  
electric shock, fire, and so on.  
• Be sure to connect ground wire. (grounding work)  
Incomplete grounding cause an electric shock.  
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires  
for telephone wires.  
• If you install the indoor unit in a small room, take appropriate measures to prevent the  
refrigerant from exceeding the limit concentration even if it leaks.  
Consult the dealer from whom you purchased the air conditioner when you implement  
the measures. Accumulation of highly-concentrated refrigerant may cause an oxygen  
deficiency accident.  
• Check whether the piping work has been properly completed.  
When existing pipes are used and if they are not constructed properly, the refrigerant  
gas may leak. Contact the installation company and confirm that the piping work has  
been properly completed. For details of installation of the air conditioner, refer to the  
Installation Manual. Use tools and piping materials for R410 only. Failure to do so or  
improper installation may cause a burst of pipe, resulting in injury.  
WARNINGS ABOUT OPERATION  
• Cleaning of the air filter and other parts of the air filter involves dangerous work in high places, so be sure to have a  
service person do it.  
The self cleaning function of the air conditioner causes the internal fan to run at a high speed in some modes even while  
the air conditioner is not working, which may cause injury.  
Do not attempt it yourself.  
• Avoid cooling the room too strong or exposing the human body to cool breeze for a long time as it is bad for the health.  
• When you notice something abnormal with the air conditioner (smells like something scorching, poor cooling, etc.),  
immediately turn off the main switch and the circuit breaker, from the mains to stop the air conditioner, and contact  
the dealer.  
If the air conditioner is continuously operated with something abnormal, it may cause machine failure, electric shock,  
fire, and so on.  
WARNINGS ABOUT MOVEMENT AND REPAIR  
• When the air conditioner cannot cool or heat a room well, contact the dealer from whom you purchased the air  
conditioner as refrigerant leakage is considered as the cause. In the case of repair that requires refill of refrigerant,  
ask service personnel about details of the repair.  
The refrigerant used in the air conditioner is harmless.  
Generally, the refrigerant does not leak. However, if the refrigerant leaks in a room and a heater or stove burner in  
the room catches fire, it may generate toxic gas.  
When you ask service personnel for repairing refrigerant leakage, confirm that the leakage portion has been  
completely repaired.  
• Do not move or repair any unit by yourself.  
Since there is high voltage inside the unit, you may get electric shock when removing the cover and main unit.  
• Whenever the air conditioner needs repair, make sure to ask the dealer to do it.  
If it is repaired imperfectly, it may cause electric shock or fire.  
• When moving the air conditioner for re-installing at another place, ask the dealer to do it. If it is imperfectly installed,  
it may cause electric shock or fire.  
EN  
– 2 –  
2-EN  
Owner’s Manual  
4-way Air Discharge Cassette Type  
CAUTION  
CAUTIONS ABOUT INSTALLATION (Be sure to confirm the following cautions.)  
• Use an exclusive power circuit for the air conditioner. Use the rated voltage.  
• Certainly lay the drain hose for perfect draining.  
Bad drainage may cause flooding in the house and getting furniture wet.  
• Make sure to connect the air conditioner to an exclusive power supply of the rated  
voltage, otherwise the unit may break down or cause a fire.  
• Do not install the unit in a place where inflammable gas may leak.  
If inflammable gas accumulates around the unit, it may cause a fire.  
CAUTIONS ABOUT OPERATION  
• Carefully read this manual before starting the air conditioner.  
There are many important things to keep in mind for daily operation.  
• Do not use this air conditioner for special purpose such as preserving food, precision  
instruments, art objects, breeding animals, car, vessel, etc.  
• When the air conditioner is operated with a combustion appliance in the same place, be  
careful of ventilation to let fresh air enter the room.  
Poor ventilation causes oxygen shortage.  
• Do not place any combustion appliance in a place where it is directly exposed to the wind  
of air conditioner, otherwise it may cause imperfect combustion.  
• When the air conditioner is used in a closed room, be careful of sufficient ventilation of the room.  
Poor ventilation causes oxygen shortage.  
• Do not touch any switches with wet fingers. You may get an electric shock.  
• If the air conditioner won’t be used for a long time, turn off the main switch or the circuit breaker, for safety.  
• Do not put anything on the outdoor unit or step on it.  
If you do, the unit may topple over or you may get injured.  
• To make the air conditioner operate in its original performance, operate it within the range of the operating  
temperature specified in the instructions.  
Otherwise it may cause a malfunction, or water leak from the unit.  
• Do not expose the remote control to any liquid.  
3-EN  
– 3 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
2. SYSTEM CHARACTERISTICS  
Air conditioner operating conditions  
For proper performance, operate the air conditioner under the following temperature conditions:  
Outdoor temperature  
Room temperature  
: 23 °F to 109.4 °F (-5 °C to 43 °C) *  
69.8 °F to 89.6 °F (21 °C to 32 °C) (Dry bulb temperature),  
59 °F to 75.2 °F (15 °C to 24 °C) (Wet bulb temperature)  
:
Cooling operation  
Room relative humidity – less than 80 %. If the air conditioner operates in excess of  
this figure, condensation may occurs on the surface of the air conditioner.  
[CAUTION]  
Outdoor temperature  
Room temperature  
Outdoor temperature  
Room temperature  
: 59 °F to 109.4 °F (15 °C to 43 °C)  
Dry operation  
: 62.6 °F to 89.6 °F (17 °C to 32 °C)  
: -4 °F to 59 °F (-20 °C to 15 °C) (Wet bulb temperature)  
: 59 °F to 86 °F (15 °C to 30 °C) (Dry bulb temperature)  
Heating operation  
*: The air conditioner can be operate when outside temperature is 5°F to 23°F (-15°C to -5°C). Installing wind  
baffle to the outdoor unit is necessary to operate the air conditioner in that outside temperature range.  
For further details, refer to the installation manual of the outdoor unit.  
If air conditioner is used outside of the above conditions, safety protection may work.  
3 minute protection function  
There is a 3-minute time delay between compressor starts.  
Auto restart  
The unit will stop after a power failure.  
• The unit will restart automatically in the same operating mode as before the power failure when the power is  
restored.  
Fan operation  
Heating  
• When there is a call for heating, the fan will not start right away. There is a delay of approximately 5 minutes to  
ensure that the indoor heat exchanger warmed up.  
• When the room temperature reaches the set temperature, the fan will run at ultra low speed to avoid blowing cold  
air on the occupants in the space.  
Cooling  
When the room temperature reaches the set temperature, the fan will run at ultra low speed.  
Defrost  
When the unit is operating in the heating mode frost forms on the outdoor heat exchanger.  
When this occurs, defrost is initiated automatically. During the defrost period (2 to 10 minutes) both the indoor and  
outdoor units stop running.  
• A hissing noise might be heard when the defrost cycle is initiated.  
• During the defrosting operation, the defrosted water will be drained from the bottom plate of the outdoor unit.  
Heating capacity  
In the heating operation, the heat is absorbed from the outside and brought into the room. This way of heating is  
called heat pump system. When the outside temperature is too low, it is recommended to use another heating  
apparatus in combination with the air conditioner.  
Attention to snowfall and freeze on the outdoor unit  
• In snowy areas, the air inlet and air outlet of the outdoor unit are often covered with snow or frozen up.  
If snow or freeze on the outdoor unit is left as it is, it may cause machine failure or poor warming.  
EN  
• In cold areas, pay attention to the drain hose so that it perfectly drains water without water remaining inside for  
freeze prevention. If water freezes in the drain hose or inside the outdoor unit, it may cause machine failure or  
poor warming.  
– 4 –  
4-EN  
Owner’s Manual  
4-way Air Discharge Cassette Type  
3. ENERGY SAVING RECOMMENDATIONS  
Select a comfortable set point and minimize adjusting it.  
• Clean the filter when ever the filter display  
remote control.  
• Keep doors and windows closed and open them only when  
necessary.  
is illuminated on  
Clean, please.  
• Use drapes, curtains, or shades to keep direct sun light from heating  
the room on very hot days.  
• Do not obstruct the return air grille.  
• Adjust the air flow direction for even air distribution in the room.  
Checks before operating  
• Check whether the ground wires are properly connected.  
• Check whether the air filters are installed.  
• Turn on the circuit breaker the initial startup or after an extended shut  
down.  
5-EN  
– 5 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
4. PART NAMES  
Indoor unit  
Knob  
Ground screw  
Knob to open/close the  
return air grille.  
Provided in the electric parts box.  
Discharge louver  
Controls discharge air  
directions  
Air filter  
Return air grill  
Part sold separately  
Remote control  
Latch of air  
filter  
Outdoor unit  
Air intake (Side and rear)  
Front panel  
There is a ground screw, valves  
and electric parts inside.  
Air Discharge  
EN  
Pipe cover  
Conduit connection holes  
Mounting leg  
* The image of the outdoor unit in the figure is in the case Model RAV-SP420AT2-UL.  
– 6 –  
6-EN  
Owner’s Manual  
4-way Air Discharge Cassette Type  
5. WIRED REMOTE CONTROL  
This remote control can control the operation of up to 8 indoor units.  
The remote control has two sections: The display section and the operation section.  
Display section  
In the display below all the icons are shown. When the unit is in operation,  
only relevant icons will be displayed.  
Pertition line  
• When the circuit breaker is turned on the first time,  
display part of the remote control.  
flashes on the  
Display  
section  
• While this display is flashing, the model is being automatically confirmed.  
TEMP.  
ON / OFF  
Wait till  
display has disappeared to use the remote control.  
TIMER SET  
TIME  
FAN  
SAVE  
MODE  
VENT  
Operation  
section  
FILTER  
RESET TEST  
SET  
CL  
SWING/FIX  
UNIT LOUVER  
19  
16 17  
1 7 8 9  
2
3
20  
10  
4
5
11  
12  
13  
6
21  
14  
15  
18  
1
2
3
SETTING display  
Displayed during setup of the timer etc..  
7
8
9
TEST run display  
Displayed during a test run.  
Operation mode  
The selected operation mode is displayed.  
Louver position display  
Displays louver position.  
Error display  
Displayed while the protective device works or a  
error occurs.  
Swing display  
Displayed during up/down movement of the  
louver.  
4
Timer display  
When a malfunction occurs, an error code is  
displayed.  
10 Set temperature display  
The selected set temp. is displayed.  
11 Remote control sensor display  
Displayed while the sensor of the remote control is  
used.  
5
6
Timer Mode display  
Displays the timer mode.  
Filter display  
, reminder to clean the air filter.  
7-EN  
– 7 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
19  
16 17  
1 7 8 9  
2
3
10  
20  
4
5
11  
12  
13  
6
21  
15  
18  
14  
12 Pre-heat display  
19 UNIT No. display  
Displayed when the heating mode is energized or  
defrost cycle is initiated.  
Displays the number of the indoor unit selected.  
Also displays error code of indoor and outdoor  
units  
While this indication is displayed, the indoor fan  
stops.  
13 No function display  
20 SET DATA  
Displayed when the function requested is not  
available on that model.  
Displayed during advanced setting.  
14 Fan speed display  
21 Service display  
The selected fan speed mode is displayed.  
(AUTO)  
(HIGH)  
(MED.)  
(LOW)  
15 Louver Number display.  
Louvers can be controlled individually. Displays  
which louver is being set.  
(exapmle:01, 02, 03, 04)  
16 Self cleaning display  
Displayed during self cleaning operation to dry the  
indoor heat exchanger.  
17 Power saving mode display  
Limits compressor speed (capacity) to save  
energy.  
18 Louver lock display  
Displayed when louver is locked or there is a  
louver-locked unit in the group.  
EN  
8-EN  
– 8 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
Operation section  
Push each button to select a desired operation.  
• The control saves commands in memory and after the initial setting, there is no need for any additional settings  
unless changes are desired. The air conditioner can be operated by pushing the button.  
8
1
9
12  
2
10  
6
7
4
11  
5
3
1
2
3
button  
9
button  
Selects the desired Fan speed.  
When the button is pushed, the operation starts, and  
it stops by pushing the button again.  
When the operation has stopped, the operation  
lamp and all the displays disappear.  
button  
Use to setup the timer.  
button  
Use only for service.  
(During normal operation, do not use this button.)  
10  
11  
button  
Selects desired operation mode.  
button  
4
button  
Selects a unit number (left) and louver number  
(right).  
Use when a power ventilation kit (commercially-  
supplied) is connected.  
” is displayed on the remote control when  
pushing the Ventilation button, no vent kit  
connected.  
UNIT :  
• If “  
Selects an indoor unit when adjusting louver  
direction when multiple indoor units are controlled  
with one remote control.  
LOUVER :  
5
6
7
button  
Selects a louver when setting louver lock or louver  
direction adjustment independently.  
Resets “ ” display after cleaning filter.  
button  
12  
button  
Adjusts the set point.  
Select the desired set point by pushing TEMP.  
Use to initiate power saving mode.  
button  
or TEMP.  
.
Use to select automatic swing or fixed louver  
position.  
OPTION :  
Remote control sensor  
Usually the temperature sensor of the indoor unit  
senses the temperature. The temperature on the  
surrounding of the remote control can also be sensed.  
For details, contact the dealer from which you have  
purchased the air conditioner.  
8
Operation lamp  
Green light illuminates when unit is on.  
Although it flashes when operating the protection  
device or an error occurs.  
9-EN  
– 9 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
6. CORRECT USAGE  
• When you use the air conditioner for the first time or when you change the setting, follow the steps below.  
Settings are saved in memory and are displayed anytime the unit is turned on by pushing the  
button.  
Preparation  
• When the circuit breaker is turned on, the partition lines are displayed on the remote control.  
* After the circuit breaker is turned on, the remote control does not accept any commands for approx. 1 minute,  
this is not a failure.  
REQUIREMENT  
• When you re-power the air conditioner after it has not been used for a long period, turn on the circuit breaker at  
least 12 hours before starting the air conditioner.  
3
Select fan speed with “  
One push of the button, and the display changes  
in the order shown below.  
” button.  
HIGH  
AUTO  
MED.  
LOW  
.
TEMP.  
ON / OFF  
1
• When fan is in “  
adjusted based on difference between set point  
and room temperature.  
AUTO”, fan speed is  
4
3
TIMER SET  
TIME  
FAN  
SAVE  
MODE  
VENT  
2
FILTER  
RESET TEST  
• In heating operation, if the room temperature is  
SET  
CL  
SWING/FIX  
UNIT LOUVER  
not heated sufficiently with volume “  
LOW”  
HIGH”  
operation, select “  
operation.  
MED.” or “  
Start  
• The temperature sensor detects the return air  
temperature at the indoor unit, which differs  
from the room temperature depending on the  
installation condition.  
1
Push  
button.  
The operation lamp illuminates, and the operation  
starts.  
Set point is a target of room temperature.  
2
Select an operation mode with the “  
button.  
One push of the button, and the display changes  
in the order shown below.  
(
“AUTO” is not selectable in the FAN  
mode.)  
4
Select the set point temperature by pushing  
the “TEMP. ” or “TEMP. ” buttons.  
AUTO  
HEAT  
DRY  
COOL  
FAN  
Stop  
Push  
button.  
The operation lamp goes off, and the operation stops.  
In the COOL, DRY, or AUTO (cooling) mode, the fan  
runs for 10 minutes (or more) for self cleaning.  
EN  
10-EN  
– 10 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
NOTE  
Auto Changeover  
• When in Auto Mode, the unit selects the operating  
mode (cooling, heating or fan only) based on the  
user selected set point temperature.  
• If the Auto mode is uncomfortable, you can select the  
desired conditions manually.  
Cooling  
• If there is a demand for cooling, unit will start  
approximately 1 minute after mode is selected.  
Heating  
• If there is a demand for heating, unit will start  
approximately 3 to 5 minutes after the mode is  
selected.  
• After the heating operation has stopped, FAN may  
continue to run for approx. 30 seconds.  
• When the room temperature reaches the set  
temperature and the outdoor unit stops, the indoor  
unit fan runs at ultra low speed and the outdoor unit  
fan runs at low speed.  
During defrost operation, the fan stops so that cool air  
is not discharged. (“  
” Pre-heat is displayed.)  
When restarting the operation after stop  
• When attempting to restart the unit immediately  
after it was stopped, the unit can not start for  
approx. 3 minutes this is to protect the compressor.  
11-EN  
– 11 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
7. TIMER OPERATION  
Three timer modes are available: (Setting of up to 168 hours is enabled.)  
OFF timer  
: The unit stops when the set time is reached.  
Repeat OFF timer : The unit stops daily when the set time is reached.  
ON timer : The unit starts when the set time is reached.  
Timer operation  
1
2
4
3
Set  
shows 1 day (24 hours).  
1
Push  
button.  
shows 10 hours. (Total 34 hours)  
The timer mode changes with every push of the  
button.  
3
4
Push  
button.  
display disappears and timer time  
display goes on, and  
flashes.  
(When ON timer is activated, timer time, ON  
or  
display  
OFF  
OFF  
ON  
(OFF timer)  
(Repeat OFF timer)  
No display  
(ON timer)  
timer  
are displayed and other displays  
disappear.)  
and timer display flashes.  
Cancel of timer operation  
Push button.  
Timer display disappears.  
NOTE  
2
Push  
• With every push of  
to select “set time”.  
button, the set time  
increases by 0.5 hr (30 minutes).  
When setting a time more than 24 hours for  
timer operation, timer can be set in increments  
of 1 hr.  
The maximum set time is 168hr (7 days).  
The remote control displays the set time with  
time (between 0.5 and 23.5 hours) (*1) or  
number of days and time (24 hours or more) (*2)  
as shown below.  
• When the operation stops after the timer reached  
the preset time, the Repeat OFF timer resumes the  
operation by pushing  
button and stops the  
operation after the time of the timer has reached the  
set time.  
• When you push  
while the OFF timer function  
of the air conditioner is active, the indication of the  
timer function disappears and then appears again  
after about 5 seconds.  
• With every push of  
decreases by 0.5 hr (30 minutes) (0.5 -  
23.5 hours) or 1 hr (24 - 168 hours).  
button, the set time  
This is due to normal processing of the remote  
control.  
Example of remote control display  
• In the case of 23.5 hours (*1)  
EN  
• In the case of 34 hours (*2)  
Number of days Time  
12-EN  
– 12 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
8. LOUVER DIRECTION  
For best cooling and heating performance, adjust the louvers appropriately. In cooling the louvers should be  
directed so that the air discharge is horizontal. In heating they should be directed to discharge towards the floor to  
prevent layers of hot air forming close to the ceiling.  
CAUTION  
Direct the louvers horizontally in cooling.  
If the louvers are pointed downward in cooling, condensation may form on the louvers and then drop to the floor.  
NOTE  
If the louvers are horizontal when in heating, the room temperature may be uneven with hot air near the ceiling.  
For cooling  
For heating  
Direct the louvers downward.  
Direct the louvers horizontally.  
• When the air conditioner is off, the louvers are directed horizontally automatically.  
• In the heating mode, at startup (the first 3 to 5 minutes), during defrost, and after the heating demand is satisfied  
(compressor turns off but fan runs at ultra low speed), the louvers are directed horizontally.  
If the swing or air direction is set during these periods, the remote control will display the selected option but the  
louvers will still be directed horizontally until the unit gets out of the three modes listed above, at which time the  
louvers are directed to the set position.  
13-EN  
– 13 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
Unit select button  
1
Set louver direction  
Stop swing operation  
1
Push  
during operation.  
1
Push  
louver is swinging.  
• When is pushed after that, the louver  
direction can be set again from the highest  
at a desired position while the  
The louver direction changes with every push of  
the button.  
In HEAT operation  
Direct the louver downward.  
position.  
• In COOL/DRY mode, the louver does not stop  
as it directs downward. If stopping the louver as  
it directs downward during swing operation, it  
stops after moving to the third position from the  
highest position.  
Initial setup  
Display when stopping the swing  
In COOL/DRY operation  
Direct the louver horizontally.  
FAN/HEAT  
operation  
COOL/DRY  
operation  
Unit select  
Initial setup  
• When multiple indoor units are controlled with one  
remote control, louver position can be set for all  
indoor units or each indoor unit individually.  
In FAN operation  
Select a desired louver direction.  
• To set louver direction for a particular unit, push  
button to display an indoor unit number in the  
control group. Then set the louver direction of the  
displayed indoor unit by following the steps outlined  
above.  
Initial setup  
• When no indoor unit number is displayed, all indoor  
units in the control group can be controlled  
simultaneously.  
Start swing operation  
Push , set the louver direction to the  
lowest position, and then push again.  
is displayed and the louvers swing  
1
• Each time you push  
(left side of the button),  
the display changes as follows:  
SWING  
UNITNo.  
1-1  
UNIT No.  
1-2  
UNIT No.  
1-3  
automatically.  
Display during swinging  
Not  
display  
UNIT No.  
1-4  
Repeat  
EN  
14-EN  
– 14 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
3
Unit select button  
2
1
Set louver direction  
03  
individually  
Refrigerant  
pipe  
1
Select an indoor unit to be set by pushing  
(left side of the button) during  
operation.  
• The indoor unit number changes each time you  
push the button.  
04  
02  
UNIT No.  
1-1  
UNIT No.  
1-2  
UNIT No.  
1-3  
Drain  
pipe  
Not  
display  
UNIT No.  
1-4  
* When no unit number is displayed, all indoor units  
are selected.  
01  
2
Select a louver you want to adjust by  
pushing (right side of the button).  
• Each time you push the button, the display on  
the remote control changes as follows:  
3
Determine louver direction of the selected  
louver by pushing  
• Each time you push the button, the display  
changes as follows:  
.
Not  
display  
(1)  
(2)  
(3)  
(4)  
* When no louver number is displayed, all four louvers  
are selected.  
(7)  
(6)  
(5)  
* During COOL (DRY) mode, (4) and (5) are not  
displayed.  
Louver No.  
15-EN  
– 15 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
9. POWER SAVING MODE  
• The power saving mode saves energy by limiting the maximum current which will effect heating or cooling  
capacity that the unit can generate.  
Push  
• The air conditioner enters power saving mode.  
appears on the display.  
button during operation.  
Power saving mode will stay in effect until it is cancelled.  
To cancel the power saving mode, push button again.  
disappears.  
NOTE  
• Power saving mode consumes less energy, but may not heat/cool the room as much as normal mode. (The  
maximum current is limited to approximately 75% (factory default) of the normal mode.)  
• This Value can be adjusted between 50% to 99% as outlined in Advanced settings.  
• To adjust the power-save settings, see “Change power saving mode setting” in 11 ADVANCED SETTINGS.  
• Even when operation start/stop, operation mode change, or power reset is performed during the power saving  
mode, the power saving mode is retained until the next operation.  
10.SELF CLEANING MODE  
This function is provided to dry the inside of the indoor unit by running the FAN mode after the compressor  
is stopped when the unit was running the COOL/DRY/AUTO (cooling) mode.  
• The self cleaning time is a function of how long the unit ran in the cool or dry modes as shown below.  
Cooling/dry/AUTO (cooling) operation time  
Less than 10 minutes  
self cleaning time  
No self cleaning operation  
1 hour  
10 minutes to less than 1 hour  
More than 1 hour  
2 hours  
• “  
” is displayed on the remote control during self cleaning operation.  
To stop self cleaning, push  
button twice in succession.  
CAUTION  
• The fan continues to run even after  
button is pushed to stop operation in some modes.  
This is normal because the self cleaning mode is in progress.  
• The louvers open slightly and are directed horizontally during self cleaning, and they close when the self cleaning is  
completed.  
• The operation lamp (LED) does not light during the self cleaning mode.  
• The self cleaning mode cannot clean the room or remove the already existing mold and dust inside the indoor unit.  
• To cancel the self cleaning function, consult the dealer.  
EN  
– 16 –  
16-EN  
Owner’s Manual  
4-way Air Discharge Cassette Type  
11.ADVANCED SETTINGS  
Swing mode  
3
1
2
1
2
Push  
for at least four seconds when  
03  
the air conditioner is not working.  
, symbol, and numbers flash.  
Refrigerant  
pipe  
Push  
(left side of the button) to select  
an indoor unit to be set.  
• Each time you push the button, the unit numbers  
change as follows:  
04  
02  
UNIT No.  
1-1  
UNIT No.  
1-2  
UNIT No.  
1-3  
Drain  
pipe  
Not  
display  
UNIT No.  
1-4  
The fan of the selected unit runs and the louvers  
start swinging.  
01  
3
Push TIME  
type.  
buttons to select a swing  
Three types of swings are available:  
Standard swing  
The four louvers swing in the same direction.  
Dual swing  
SET DATA  
Louvers 01 and 03 are directed and swing in  
one direction, and/then louvers 02 and 04 are  
directed and swing in the opposite direction.  
(When louver 01 is directed downward, louver  
02 is directed horizontally.)  
SET DATA  
0001  
Swing of louvers  
Standard swing  
(Factory default)  
0002  
0003  
Dual swing  
Cycle swing  
Cycle swing  
The four louvers swing independently at  
respective timings.  
CAUTION  
• Do not set the SET DATA to “0000”.  
(This setting may cause a failure of the louvers.)  
4
5
Push  
Push  
button.  
button to complete the setting.  
17-EN  
– 17 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
Louver lock (No swing)  
3
4
2 1  
1
2
Push  
(right side of the button) for at  
CAUTION  
least four seconds when the air conditioner  
is not working.  
• If (4) or (5) is selected, condensation may drop from  
the unit during operation in cooling mode.  
and numbers flash.  
Push  
(left side of the buttom) to  
select an indoor unit to be set.  
• Each time you push the button, unit numbers  
change as follows:  
The fan of the selected unit runs and the louvers  
start swinging.  
5
Push  
button to lock the louver.  
• When the setting has been determined,  
lights up.  
(To continue louver lock settings for other indoor  
units, repeat from step 2. To continue louver  
lock settings for other louvers on the same  
indoor unit, repeat from step 3.)  
UNIT No.  
1-1  
UNIT No.  
1-2  
UNIT No.  
1-3  
UNIT No.  
1-4  
6
Push  
button to complete the setting.  
3
4
Push TEMP.  
number of a louver you want to lock on the  
temperature display.  
buttons to display the  
• The selected louver starts swinging.  
0001-0005  
(Louver lock position code)  
• A louver number is displayed as F1, F2 on the  
remote control (SET DATA), showing that louver  
01, 02 shown in the figure on the previous page  
is selected.  
Push TIME  
louver direction of the louver you do not  
want to swing.  
buttons to select the  
(1)  
0001  
(2)  
0002  
(3)  
0003  
SET DATA  
NOTE  
Even when louvers are locked, they move temporarily  
in the following cases:  
• When the air conditioner is stopped  
• At the beginning of heating operation  
• During defrosting operation  
(4)  
0004  
(5)  
0005  
• When the room temperature has reached the set  
temperature  
EN  
18-EN  
– 18 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
Cancel louver lock  
Set the louver direction to “0000” in step 4 of the louver lock setup procedure.  
SET DATA  
“0000”  
• When the setting is cancelled,  
goes out.  
Perform the same operations as steps 1, 2, 3, 5, and 6 above.  
Change power saving mode setting  
1
3
2
4
5
1
2
Push  
button for at least four seconds  
3
Push TIME  
buttons to adjust the  
when the air conditioner is not working.  
power-save setting.  
and numbers flash.  
(left side of button) to select an  
• Each push of the button changes the power  
level by 1% within the range from 100% to 50%.  
* The factory default is 75%.  
Push  
indoor unit to be set.  
• Each time you push the button, unit numbers  
change as follows:  
UNIT No.  
1-1  
UNIT No.  
1-2  
UNIT No.  
1-3  
UNIT No.  
1-4  
Setting of power level in  
power saving mode  
The fan of the selected unit runs and the louvers  
start swinging.  
4
5
Push  
Push  
button.  
button to complete the setting.  
19-EN  
– 19 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
12.MAINTENANCE  
WARNING  
Cleaning the air filter and other parts of the air filter involves dangerous work in high places, so be  
sure to have a service person to do it.  
Do not attempt to do it by yourself.  
To avoid the possibility of electric shock, always turn off power to the system before performing any  
cleaning or maintenance to the system. Turn off the outdoor disconnect switch located near outdoor  
unit.  
Operating the system with dirty filters may damage the indoor unit and could cause reduced cooling  
performance.  
Periodic Maintenance - periodic maintenance is recommended to ensure proper operation of the unit.  
Recommended maintenance intervals may vary depending on the installation environment, e.g. dusty zones, etc.  
Refer to table below.  
Periodic Maintenance  
INDOOR UNIT  
EVERY MONTH  
EVERY 4 MONTHS  
EVERY YEAR  
1
Clean Air Filter*  
Clean Drain Pan  
1
1
2
Clean indoor heat exchanger*  
1
1
1
2
Clean fan*  
Change Remote Control Batteries  
OUTDOOR UNIT  
EVERY MONTH  
EVERY 4 MONTHS  
EVERY YEAR  
Clean Outdoor heat exchanger from Outside  
1
2
Clean Outdoor heat exchanger from Inside*  
1
1
1
1
1
1
2
Blow Air Over Electric Parts*  
2
Check Electric Connection Tightening*  
2
Clean Fan Wheel*  
Check Fan Tightening*  
2
2
Clean Drain Pans*  
*1: Increase frequency in dusty zones.  
*2: Maintenance to be carried out by qualified service personal.  
REQUIREMENT  
Be sure to clean the heat exchanger with pressurized water.  
If a commercially available detergent (strong alkaline or acid) cleaning agent is used, the surface treatment of the  
heat exchanger will be marred, which may degrade the self cleaning performance.  
For further details, contact the dealer.  
Replacing antibacterial glass  
Request your dealer to replace the antibacterial glass every 10000 hours of  
cooling operation.  
Part code  
43179152  
EN  
Antibacterial glass  
– 20 –  
20-EN  
Owner’s Manual  
4-way Air Discharge Cassette Type  
8. Push  
button to reset filter timer.  
Cleaning the air filter  
• “FILTER ” disappears.  
The fan is running for self cleaning maintenance after  
running the cooling or dry mode. Terminate the self  
cleaning mode forcibly when maintaining the air  
conditioner.  
CAUTION  
• Do not start the air conditioner while leaving the panel  
and air filter removed.  
• If  
is displayed on the remote control, clean the air  
filter.  
1. Open the return air grille by sliding the latches. Let  
the grille drop while holding it.  
Cleaning Unit Grille and Frame  
To clean the grille and the frame, wipe the outside with  
a soft, dry cloth. If necessary, a mild liquid detergent  
can be applied and wiped off with a dry cloth.  
Cleaning The Louvers  
1. Remove the discharge louver by holding it at both  
ends and pulling downwards towards the center.  
Return air grille  
Knob  
2. Remove the air filter from grille.  
2. Clean the louvers with water or mild detergent.  
3. Mount the discharge louver by inserting one end and  
bending it outwards to allow the other end to be  
inserted.  
2)Insert in the louver sagging  
down the center downward.  
1) Insert  
Strap to  
prevent falling  
Air filter  
3. Vacuum the filter and rinse it with water.  
4. Dry the filter.  
NOTE  
5. Wipe the inside of the return air grille with water or  
mild detergent and then dry it.  
6. Reinstall the filter.  
When installing the louvers, make sure the side with  
marking faces upwards.  
7. Close the grille and secure it to the frame by the  
latches.  
Preparing for long Shut Down Period  
1. Clean the filters and repostion them in unit.  
2. Operate the unit in fan mode for 3 or 4 hours to dry  
all internal parts.  
3. Turn the unit off and disconnect the main power  
supply.  
4. Before unit is turned on again, make sure the circuit  
breaker has been turned on for at least 12 hours.  
Return air grille  
Knob  
21-EN  
– 21 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
13.INFORMATION FOR INSTALLATION  
Installation place  
CAUTION  
Check that the air conditioner is not installed in a place subject to combustible gas leak.  
Accumulation of combustible gas around the unit may cause a fire.  
• Drain the dehumidified water from the indoor unit and outdoor unit to a well-drained place.  
• Do not put any obstacle near the air inlets and air outlet of the outdoor unit. Doing so may hinder the radiation, which  
may reduce the performance or activate the protective device.  
Electrical wiring  
WARNING  
• Be sure to connect ground wire. (grounding work)  
Incomplete grounding cause an electric shock.  
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.  
CAUTION  
Make sure that a circuit breaker is connected.  
Using the air conditioner without circuit breaker may cause electric shock.  
Use circuit breaker with appropriate capacity.  
Be sure to use the rated voltage and an exclusive circuit for power supply of the air conditioner.  
Do not install the air conditioner in the following places  
• Do not install the air conditioner in any place within 3’3” (1 m) from a TV, stereo, or radio set. If the unit is installed  
in such place, noise transmitted from the air conditioner affects the operation of these appliances.  
• Do not install the air conditioner near a high frequency appliance (sewing machine or massage machine for  
business use, etc.), otherwise the air conditioner may malfunction.  
• Do not install the air conditioner in a humid or oily place, or in a place where steam, soot, or corrosive gas is  
generated.  
• Do not install the air conditioner in a salty place such as seaside area.  
• Do not install the air conditioner in a place where a great deal of machine oil is used.  
• Do not install the air conditioner in a place where it is usually exposed to strong wind such as in seaside area.  
• Do not install the air conditioner in a place where sulfurous gas generated such as in a spa.  
• Do not install the air conditioner in a vessel or mobile crane.  
• Do not install the air conditioner in an acidic or alkaline atmosphere (in a hot-spring area or near a chemicals  
factory, or in a place subject to combustion emissions). Corrosion may be generated on the aluminium fin and  
copper pipe of the heat exchanger.  
• Do not install the air conditioner near an obstacle (air vent, lighting equipment, etc.) that disturbs discharge air.  
(Turbulent airflow may reduce the performance or disable devices.)  
• Do not use the air conditioner for special purposes such as preserving food, precision instruments, or art objects,  
or where breeding animals or growing plants are kept. (This may degrade the quality of preserved materials.)  
• Do not install the air conditioner over an object that must not get wet. (Condensation may drop from the indoor  
unit at a humidity of 80% or more or when the drain port is clogged.)  
• Do not install the air conditioner in a place where an organic solvent is used.  
• Do not install the air conditioner near a door or window subject to humid outside air. Condensation may form on  
the air conditioner.  
EN  
• Do not install the air conditioner in a place where special spray is used frequently.  
– 22 –  
22-EN  
Owner’s Manual  
4-way Air Discharge Cassette Type  
Be careful with noise or vibrations  
• Do not install the air conditioner in a place where noise by outdoor unit or hot air from its air outlet annoys your  
neighbors.  
• Install the air conditioner on a solid and stable foundation so that it prevents transmission of resonating, operation  
noise and vibration.  
• If one indoor unit is operating, some sound may be audible from other indoor units that are not operating.  
WARNING  
Re-Installation  
Ask the dealer or an installation professional to re-install the air conditioner to a new place or move it to another place  
and to observe the following items.  
If the air conditioner is inappropriately installed by yourself, it may cause electric shock or fire.  
Maintenance  
• This product incorporates a drain pump.  
If it is used in a place full of dust or oil mist, the pump will be clogged and proper drainage is disabled.  
Clean the drain pump periodically. For how to clean the drain pump, contact the dealer.  
CAUTION  
Be sure to clean the heat exchanger with pressurized water.  
If an commercially detergent (strong alkaline or acid cleaning agent) is used, the surface treatment of the heat  
exchanger will be marred, which may degrade the self cleaning performance.  
For details, contact the dealer.  
23-EN  
– 23 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
14.TROUBLE SHOOTING  
CAUTION  
If any of the following conditions occur, turn off the circuit breaker and immediately contact the dealer:  
• The operation lamps flash at short intervals (5 Hz) even though you have tried turning off the power supply and turning  
on again after 2 or 3 minutes.  
• Switch operation does not work properly.  
• The main power fuse often blows out, or the circuit breaker is often activated.  
• A foreign matter or water fall inside the air conditioner.  
• When the air conditioner does not operate even after the cause of the protective device activation has been removed.  
(The operation lamp and  
on the remote control are flashing.)  
• Any other unusual conditions are observed.  
Before you ask for servicing or repairs, check the following points.  
Recheck  
Inoperative  
• The circuit breaker is turned off.  
• The circuit breaker is activated to cut off power supply.  
• The main power fuse has blown out.  
• The louvers are not directed correctly.  
Does not cool well or heat well  
• The air inlet and/or outlet of the outdoor unit is blocked.  
• Doors or windows are opened.  
• The fan speed is set to low.  
• The air conditioner is set in the DRY mode in cooling.  
• The set temperature is too high (In cooling) or low (In heating).  
These are not malfunction.  
Indoor unit or outdoor unit makes a strange noise.  
• When the temperature suddenly changes, the indoor or outdoor unit occasionally makes a strange noise  
because of expansion/ contraction of parts or change of refrigerant flow.  
• Air leaking sound is heard occasionally.  
It is generated by the solenoid valve when it is actuated.  
• A clattering sound is heard when the power is turned on.  
It is generated by the outdoor unit during preparation for operation.  
The room air is smelly or a bad odor comes from the air conditioner.  
• Smells impregnated in the walls‚ carpets, furniture, clothing, or furs, come out.  
Outdoor unit is frosted in heating operation.  
Water drains from outdoor unit.  
• The outdoor unit is sometimes frosted in heating operation.  
In that case, the unit automatically performs defrosting (for 2 - 10 minutes) for increasing the heating efficiency.  
• In defrosting operation, both the indoor and outdoor units stop air flow.  
• Hiss sound is heard when flow of the refrigerant is changed for defrosting.  
• Resultant water of automatic defrosting in heating operation drains from outdoor unit.  
The fan does not stop when the operation is stopped.  
• The fan runs in the self cleaning mode to dry the heat exchanger.  
EN  
Air flow changes though the FAN button is not set to the AUTO mode.  
• When the temperature of blown air drops in heating operation, the air conditioner automatically changes or stops  
air flow from the indoor unit not to make persons in the room feel chilly.  
• Air flow from the indoor unit is occasionally changed in the cooling operation.  
– 24 –  
24-EN  
Owner’s Manual  
4-way Air Discharge Cassette Type  
A white mist of chilled air or water is generated from the outdoor unit.  
• When the indoor unit in cooling operation or the outdoor unit in defrosting operation occasionally steams.  
Protective device  
• The protective device stops operation when the air conditioner is overloaded.  
• When the protective device is activated, the current operation stops and the operation lamp and  
remote control flash.  
on the  
When the protective device is activated  
• When the protective device has been activated and stopped operation, turn off the circuit breaker immediately,  
and ask the installer to find the cause.  
If the air conditioner is operated without fixing the problem, the air conditioner may malfunction.  
• Check whether the air filters are installed.  
If the air filters are not installed, the air coil may be clogged with dust, which may result in water leakage.  
Cooling  
• When the air inlet and/or outlet of the outdoor unit are blocked  
• When the air outlet of the outdoor unit is continuously exposed to strong wind  
Heating  
• When the air filters are clogged with too much dust or dirt  
• When the suction port and/or discharge port of the indoor unit are blocked  
Do not turn off the circuit breaker  
Do not turn off the circuit breaker during a test run of the air conditioner. Use the ON/OFF button on the air  
conditioner instead to control the power.  
Contact a qualified dealer or contractor if the system is not operating properly or any of the following occurs:  
• On board safety control stops the system. When this happens the operation lamp and on the remote control are  
flashing.  
• When a diagnostic code is displayed on the wired remote control.  
Make a note of the error code and inform the dealer or cotractor.  
25-EN  
– 25 –  
Owner’s Manual  
4-way Air Discharge Cassette Type  
MEMO  
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EN  
– 26 –  
EH99933501  

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