Toshiba Ras 10sk E User Manual

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9. TROUBLESHOOTING CHART ..................................................................................... 32  
9-1. What to be Prechecked First .................................................................................................. 32  
9-1-1. Power Supply Voltage...........................................................................................................................32  
9-1-2. Incorrect Cable Connection between Indoor and Outdoor Units .....................................................32  
9-1-3. Misleading but Good Operations.........................................................................................................33  
9-2. Primary Judgement of Trouble Sources ............................................................................... 34  
9-2-1. Role of Indoor Unit Controller..............................................................................................................34  
9-2-2. Display of Abnormalities and Judgement of the Abnormal Spots ...................................................34  
9-3. Troubleshooting Flowcharts................................................................................................... 38  
9-3-1. Power can not be Turned on ................................................................................................................38  
9-3-2. Power can not be Turned on after Replacing Indoor PC Board .......................................................39  
9-3-3. Outdoor Unit does not Operate ...........................................................................................................39  
9-3-4. Only Compressor does not Operate ...................................................................................................40  
9-3-5. Only Outdoor Fan does not Operate ...................................................................................................41  
9-3-6. Only the Indoor Fan does not Operate................................................................................................42  
9-4. How to Check the Remote Control (Including the Indoor PC Board) ................................ 43  
9-4-1. How to Check the PC Board.................................................................................................................44  
9-4-2. PC Board Layout ...................................................................................................................................46  
9-4-3. How to Reduce the Operation Time of the Anti-Restart Timer .........................................................47  
10. PART REPLACEMENT ................................................................................................. 48  
10-1. Indoor Unit ................................................................................................................................ 48  
10-2. Microcomputer ......................................................................................................................... 50  
10-3. Outdoor Unit ............................................................................................................................. 51  
11. CAUTIONS ON REPLACEMENT OF PC BOARD ASSEMBLY.................................... 52  
12. EXPLODED VIEWS AND PARTS LIST........................................................................ 53  
12-1. Indoor Unit (1)........................................................................................................................... 53  
Indoor Unit (2)........................................................................................................................... 54  
12-2. Outdoor Unit ............................................................................................................................. 55  
– 3 –  
1. SPECIFICATIONS  
RAS-10SK-E/10SA-E  
RAS-10SKX/10SAX  
Model  
Item  
COOLING  
240V 220V  
2.70 2.70  
Single  
220V  
2.65  
230V  
2.65  
230V  
2.70  
240V  
2.70  
Capacity  
*1 kW  
Phase  
Power source  
V
220/230/240  
50  
Hz  
Power consumption  
Power factor  
kW  
0.83/0.85/0.88  
95/92/90  
230V  
%
A
220V  
0.15/3.82  
240V  
0.15/3.92  
Running current  
Indoor/Outdoor  
0.15/3.87  
16  
Starting current  
A
Moisture removal  
lit/h  
dB  
dB  
1.2  
Indoor (H/M/L)  
44/36/31  
44/45/45  
R-22  
Noise  
Outdoor (220/230/240V)  
Name of refrigerant  
Rated volume  
Refrigerant  
kg  
0.73  
Refrigerant control  
Capillary tube  
9.52  
Gas side size  
mm  
mm  
Connection type  
Liquid side size  
Connection type  
Flare connection  
6.35  
Flare connection  
10  
Interconnection pipe  
Maximum length (of one way) m  
Maximum height difference  
Indoor unit  
*2  
5
m
Outdoor unit  
Condensate drain pipe Outer diameter  
mm  
16  
INDOOR UNIT  
RAS-10SK-E/RAS-10SKX  
Height  
mm  
mm  
mm  
kg  
265  
Dimensions  
Width  
Depth  
790  
174  
Net weight  
8
Evaporator type  
Indoor fan type  
Finned tube  
Cross flow fan  
3
High fan  
m /h  
650  
3
Air volume  
Medium fan  
Low fan  
m /h  
510  
3
m /h  
430  
Fan motor output  
Air filter  
W
19  
Polypropylene net filter (Washable)  
OUTDOOR UNIT  
RAS-10SA-E/RAS-10SAX  
Height  
Width  
Depth  
mm  
mm  
mm  
kg  
530  
Dimensions  
770  
200  
Net weight  
29  
Finned tube  
Propeller  
1600  
Condenser type  
Outdoor fan type  
Airflow volume  
Fan motor output  
3
m /h  
W
18  
Model  
PH102T1-4C  
750  
Compressor  
Output  
W
Safety device  
Auto louver  
Fuse, Overload relay  
Ye s  
Usable outdoor temperature range  
°C  
21 ~ 43  
Specifications are subject to change without notice.  
– 4 –  
Note : *1  
• Capacity is based on the following temperature conditions.  
Condition  
JIS C9612-1994  
Cooling  
27°C  
Temperature  
(DB)  
Indoor unit inlet air temperature  
(WB)  
19°C  
(DB)  
Outdoor unit inlet air temperature  
(WB)  
35°C  
24°C  
Notes : *2 CHARGELESS  
• No additional refrigerant required.  
• This air conditioner accepts a connection piping length of up to 10m and a head of up to 5m.  
• There is no need to add the refrigerant as long as the total length of the connection piping is up to 10m.  
– 5 –  
2. CONSTRUCTION VIEWS  
2-1. Indoor Unit  
RAS-10SK-E  
RAS-10SKX  
Heat exchanger  
Air inlet  
Air filter  
790  
174  
10SK-E : Without power cord  
10SKX : With power cord  
1800  
47  
Air outlet  
Knock out system  
790  
Front panel  
Back body  
232  
326  
Hanger  
232  
47  
Drain hose (0.54m)  
Hanger  
321  
Knock out system  
Connecting pipe (0.39m)  
(Flare ø9.52)  
Connecting pipe (0.49m)  
(Flare ø6.35)  
65.5  
659  
65.5  
Hanger  
Wireless  
remote  
control  
450  
326  
66 or more  
For stud bolt  
(ø8~ø10)  
Hanger  
Minimum  
distance  
to ceiling  
For stud bolt  
(ø6)  
55  
16  
Minimum  
Remote  
control  
holder  
Minimum  
distance to wall  
distance  
to wall  
120 or more  
120 or more  
Hanger  
Center line  
Hanger  
Installation  
plate outline  
59.6  
5
60.5  
126  
76  
319  
269  
790  
– 6 –  
2-2. Outdoor Unit  
RAS-10SA-E  
RAS-10SAX  
600  
111  
85  
Detail Drawing  
36  
A
Gas side (flare ø9.52)  
ø25 Drain hole  
A
600  
36  
50  
R10  
Liquid side (flare ø6.35)  
200  
50  
ø6 Hole  
ø11x14 Hole  
Handle  
8-ø6 Holes  
(For fixing the outdoor unit)  
12  
4-ø11x14 Long holes  
(For anchor bolt ø8-ø10)  
111  
11  
Fan guard  
ø420  
TOSHIBA  
Electric  
parts cover  
Z
54  
62  
Access for  
charging  
250  
770  
59  
59  
770  
View  
Z
600  
Inlet port  
600 or more  
Inlet port  
100 or more  
Visible outline  
of the product  
(Minimum distance  
of the wall)  
4-ø11x14 Long holes  
(For anchor bolt ø8-ø10)  
Outlet  
port  
Center  
port  
Mounting dimension of anchor bolt  
– 7 –  
3. WIRING DIAGRAM  
Model  
Section A  
LOUVER  
MOTOR  
RAS-10SK-E/SA-E  
220/230/240V ~  
50Hz  
L
N
FAN MOTOR  
DC  
MOTOR  
THERMAL FUSE  
77˚C x 2  
RAS-10SKX/SAX  
220/230/240V ~  
50Hz  
L
N
6 5 4 3  
6 5 4 3  
5 4 3  
3
3
2 1  
2 1  
2 1  
5 4 3 2  
1
1
CN04  
CN07  
1
CN10  
SG01  
R109  
MAIN P.C. BOARD  
MCC-713  
BLK  
GRN&YEL  
R116  
IC04  
DSA  
VARISTOR  
P04  
F01 FUSE  
R01  
C01  
DB01  
BRW  
BLU  
T01  
T3.15A  
250V  
L
N
C02  
Section A  
DC 35V  
3
4
3
C15  
R21  
RY01  
POWER  
TERMINAL  
BLOCK  
L01  
DC 12V  
RY02  
4
DC 7V  
DC 0V  
BLK  
WHI  
C06  
IC02  
IC  
IC01  
4 5 6 7 8 9  
1 2  
1 2  
2
1 2  
1 2 3  
1
CN03  
CN01  
CN13  
CN25  
4 5 6 7 8 9  
4 5 6 7 8 9  
1 2 3  
1 2 3  
INFRARED RAYS RECEIVE  
AND INDICATION PARTS  
HEAT  
THERMO  
SENSOR  
(TA)  
EXCHANGER  
SENSOR  
(TC)  
INDOOR  
TERMINAL  
BLOCK  
1
2
2
INDOOR  
DSA : Surge absorber  
OUTDOOR  
OUTDOOR  
TERMINAL  
BLOCK  
1
COLOR IDENTIFICATION  
GRN & YEL  
CHASSIS  
BRW : BROWN  
RED : RED  
WHI : WHITE  
YEL : YELLOW  
BLU : BLUE  
BLK : BLACK  
GRY : GRAY  
PNK : PINK  
BLK  
OVER LOAD  
RELAY  
RED  
RUNNING  
CAPACITOR  
RUNNING  
CAPACITOR  
RED  
BLK BLK  
FAN MOTOR  
RED  
WHI  
COMPRESSOR  
ORN : ORANGE  
PNK  
WHI  
GRN&YEL : GREEN &  
YELLOW  
– 8 –  
4. SPECIFICATIONS OF ELECTRICAL PARTS  
4-1. Indoor Unit  
RAS-10SK-E  
RAS-10SKX  
No.  
Parts name  
Type  
Specifications  
ICF-35-19-3  
or  
DC 35V, 19W  
1
Fan motor (for indoor)  
TICF-35-19-3  
Thermo sensor  
(TA-sensor)  
2
(microprocessor)  
10kat 25°C  
3
4
DC-DC transformer (T01)  
Microcomputer  
SWT-34  
DC390V, Secondary DC35V, 12V, 7V  
TMP87CK40F  
Power relay (RY01), Com-  
mon relay (RY02)  
5
6
DI1U  
Coil : DC12V 75mA, Rated AC250V 20A  
Heat exchanger sensor  
(TC-sensor)  
(microprocessor)  
10kat 25°C  
Line filter (L01)  
Diode (DB01)  
RF-103YOR6  
RBV-406  
10mH, AC 0.6A  
4A, 600V  
7
8
Capacitor (C02)  
Fuse (F01)  
CEAUF2W101M20 100µF, 450V  
9
T3.15A, 250V  
MT3  
10  
11  
12  
13  
14  
Power supply IC (IC01)  
Varistor (R21, R109)  
Resistor (R01)  
Louver motor  
MA2830-FJ  
15G561K  
4A, 600V  
560V  
ERF-5TK5R6  
MP35EA7  
5.6 , 5W  
Output (Rated) 2W, 10poles, 1phase DC 12V  
4-2. Outdoor Unit  
RAS-10SA-E  
RAS-10SAX  
No.  
Parts name  
Type  
Specifications  
Output (Rated) 750W, 2pole, 1phase, 220/230/240V, 50Hz  
Red-Black  
3.88  
White-Black  
5.06  
1
Compressor  
PH102T1-4C  
Winding resistance ()  
(at 20°C)  
Output (Rated) 18W, 6pole, 1phase, 220/230/240V, 50Hz  
Red-Black  
370  
White-Black  
370  
2
3
Fan motor (for outdoor)  
UE6-21SJ5P  
SK-50FMP  
Winding resistance ()  
(at 20°C)  
Running capacitor  
(for fan motor)  
500V AC, 1.5µF  
Running capacitor  
(for compressor)  
4
5
SK-40CMP25U1  
400V AC, 25µF  
J-MRA99285-9201  
Overload relay  
U/T 6.1A (80°C), OPEN 135±5°C, CLOSE 78±11°C  
– 9 –  
5. REFRIGERANT CYCLE DIAGRAM  
RAS-10SK-E / RAS-10SA-E  
RAS-10SKX / RAS-10SAX  
T1  
Indoor unit  
Evaporator  
Cooling  
0.39m  
0.49m  
(Connecting pipe)  
ø9.52  
(Connecting pipe)  
ø6.35  
Cross flow fan  
Optional piping kits  
RB-P31BFH1 (3m)  
RB-P51BFH1 (5m)  
RB-P71BFH1 (7m)  
O.D.:9.52mm  
O.D.:6.35mm  
P
Packed valve  
Packed valve  
(ø6.35)  
(ø9.52)  
Capillary tube  
ø1.5x1200  
Accumulator  
Compressor  
PH102T1-4C  
Dryer  
Condenser  
Refrigerant  
R-22 0.73kg  
Propeller fan  
Outdoor unit  
Mark (  
) means check points of Gas Leak  
Fig. 5-1  
Table 5-1  
Standard pressure  
Surface temp. of heat  
exchanger interchanging  
pipe T1 (°C)  
Ambient temp.  
conditions DB/WB  
(°C)  
P
Fan speed  
(indoor)  
(kg/cm²G)  
10SK-E  
50Hz  
10SK-E  
10SKX  
5.0  
10SKX  
13.0  
18.0  
2.0  
Indoor Outdoor  
Standard  
High  
High  
Low  
27/19  
32/23  
21/15  
35/24  
43/26  
21/15  
Cooling High temperature  
Low temperature  
6.5  
4.0  
Note :  
• Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor.)  
– 10 –  
6. MICRO-COMPUTER BLOCK DIAGRAM  
– 11 –  
7. OPERATION DESCRIPTIONS  
7-1. FAN ONLY Operation  
7-2. COOL Operation  
(MODE of the remote control : FAN ONLY)  
(MODE of the remote control : COOL)  
(1) During this mode, the relay RY01 is always turned  
off so that only the indoor fan is operated. RY02  
is always turnd on. FAN-ONLY display is lit.  
(1) Compressor, outdoor fan and operation display  
are controlled as shown in Fig. 7-2-1.  
1) When the FAN is set to AUTO, the indoor fan  
motor operates as shown in Fig 7-1-1.  
2) When the FAN is set to LOW, MED, or HIGH,  
the indoor fan motor operates with a constant  
in volume as listed in Table 7-1-1.  
ON  
+1  
ON  
ON  
OFF  
Set  
temp.  
0
28  
HIGH  
27  
MED  
26  
LOW(+)  
25  
Fig. 7-2-1  
LOW  
24  
(2) Relays RY01 and RY02 are turned on to energize  
the outdoor unit, and a cool operation is carried  
out.  
LOW  
Fig. 7-1-1 Auto setting of air volume  
1) When the FAN is set to AUTO, the indoor fan  
motor operates as shown in Fig 7-2-2.  
Table 7-1-1 Manual setting of FAN SPEED  
2) When the FAN is set to LOW, MED, or HIGH,  
the indoor fan motor operates with a constant  
in volume as listed in Table 7-1-1.  
HIGH Air volume  
(m3/h)  
Indication of  
FAN SPEED  
LOW  
MED  
HIGH  
430  
510  
650  
FAN  
AUTO  
HIGH  
Manual  
+4  
+3  
+2  
+1  
0
MED  
LOW(+)  
LOW  
According  
to the set  
position  
(2) 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 the START/STOP button.  
LOW  
(continuous)  
Set  
temp.  
RY01  
OFF  
Fig. 7-2-2  
(3) 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 the START/STOP button.  
– 12 –  
7-2-1. Louver Control  
7-3. DRY Operation  
(1) By pushing the SET button of the remote control  
during the operation, the louver can be set to the  
desired position.  
(MODE of the remote control : DRY)  
(1) Compressor, outdoor fan and operation display  
are controlled as shown in Fig. 7-3-1.  
And the louver position is stored in the microcom-  
puter, the louvers will be set to the position au-  
tomatically at the next operation.  
(2) When the AUTO button is pushed, the louver ver-  
tically swings within range of 25deg.  
+3  
+2  
+1  
0
ON  
ON  
OFF  
Set  
temp.  
Fig. 7-3-1  
The microprocessor turns the compressor on  
and off at regular intervals (4 to 6 minutes on  
and/or off). During the compressor off, the  
indoor fan will operate in the super low position.  
The indoor fan will operate in the AUTO  
position.  
(2) The pattern of operation depending on the relation  
between room temperature and set temperature  
is shown below:  
Room temp.  
Set temp.+1  
Set temp.  
ON  
ON  
ON  
L.  
ON  
L.  
Compressor  
Outdoor fan  
OFF  
OFF  
S.L.  
OFF  
S.L.  
Indoor fan  
L. *S.L. L.  
*Super Low  
Fig. 7-3-2  
– 13 –  
7-4-1. Temporary Auto  
7-4. AUTO Operation  
When the TEMPORARY button is pushed, the set  
temperature is fixed at 24°C and controlled in accor-  
dance with the chart shown in Fig. 7-4-1.  
(MODE of the remote control : AUTO)  
(1) One of the 2 modes, Cooling or Dry is selected  
according to room temperature at which operation  
is to start, as shown in Fig. 7-4-1. The Fan mode  
will continue until room temperature reaches a  
level at which another mode is selected.  
Cooling mode (The same cooling mode as the room temperature control is set at set temp. –1˚C)  
The Louver moved downward.  
+4  
+1  
Cooling mode (The same cooling mode as the room temperature control is set at set temp. –1˚C)  
Dry mode  
(The same dry operation as the room temperature control is set at set temp. –1˚C)  
Fig. 7-4-1  
– 14 –  
7-5. ECONO. Mode  
7-6. Low-Temperature Limit Control  
(Cooling Operation)  
When the ECONO. button is pushed, during COOL  
and AUTO operation, the OPERATION display is  
turned off and the ECONO. display is lit and the indoor  
unit operates quietly and mildly with controlling airflow.  
The microprocessor detects the indoor heat exchanger  
temperature so as to prevent freezing up the indoor  
heat exchanger.  
Control is performed as shown in Fig. 7-6-1.  
7-5-1. Cooling  
(1) In the ECONO. mode, the set temp. by the remote  
control is changed automatically as shown in Fig.  
7-5-1.  
Heat exchanger  
temperature  
Compressor  
Outdoor fan  
(˚C)  
7
ON  
(2) Fan speed LOW  
Less than 5˚C continues  
for 5 minutes  
OFF  
5
(˚C)  
Set temp.  
is changed  
+2  
Set temp.  
is changed  
Fig. 7-6-1  
+1  
0H  
1H  
2H  
TIME  
Set temp.  
ECONO. button  
is pushed  
Fig. 7-5-1  
– 15 –  
7-7-1. How to Set the Auto Restart  
7-7. Auto Restart Function  
To set the Auto Restart function, proceed as follows:  
This unit is equipped with an Automatic restarting  
facility which allows the unit to restart and resume the  
set operating conditions in the event of a power supply  
shutdown without the use of the hand control.  
Access the TEMPORARY button located in the lower  
right hand corner beneath the hinged front panel of  
the indoor unit (please refer to section on PARTS  
NAME). The power supply to the unit must be on -  
the function will not be set if the power is off.  
The operation will resume without warning three  
minutes after the power is restored.  
To enable the Auto Restart function, press the  
TEMPORARY button continuously for three seconds.  
The Auto Restart function is set not to work on  
shipment from the factory, and so it is necessary to  
set it to function as required.  
The unit will acknowledge the setting and beep three  
times. The system will now restart automatically.  
The above Auto Restart settings can be carried out:  
• When the system is stand-by (not running)  
OPERATION  
MOTION  
Press the TEMPORARY button  
continuously more than three  
seconds.  
Stand-by  
The system starts to operate.  
The green light will be lit.  
about three seconds after  
The orange light will be lit.  
0
The unit beeps three times.  
3S  
The system is operating.  
The orange light is lighting.  
TEMPORARY  
If the system is not required to run at this time, press theTEMPORARY  
button once more or use the remote control and the unit will stop.  
• When the system is operating  
OPERATION  
MOTION  
Press the TEMPORARY button  
continuously more than three  
seconds.  
Operating  
The green light is lit.  
The system stops to operate.  
The green light is turned off.  
about three seconds after  
The unit beeps three times.  
0
3S  
The system stops.  
TEMPORARY  
If the system is not required to stop at this time, use the remote control  
and to restart.  
During subsequent operation, the orange light is lit.  
• During louver swing (AUTO) operation, after restart  
by the Auto Restart function the louver swing stops.  
• The Auto Restart function will not accept an  
instruction if timer operation with the remote control  
is selected.  
(Please refer to the section on setting the timer or  
setting the louver.)  
– 16 –  
7-7-2. How to Cancel the Auto Restart  
The system will now be required to manually restart  
with the remote control after the main supply is turned  
off.  
To cancel the Auto Restart function, proceed as  
follows:  
Cancellation is carried out:  
Repeat the setting procedure: the unit will  
acknowledge the instruction and bleep three times.  
• When the system is stand-by (not running)  
OPERATION  
MOTION  
Press the TEMPORARY button  
continuously more than three  
seconds.  
Stand-by  
The system starts to operate.  
The orange light will be lit.  
about three seconds after  
The green light will be lit.  
0
The unit beeps three times.  
3S  
The system is operating.  
TEMPORARY  
If the system is not required to run at this time, press theTEMPORARY  
button once more or use the remote control and the unit will stop.  
• When the system is operating  
OPERATION  
MOTION  
Press the TEMPORARY button  
continuously more than three  
seconds.  
Operating  
The orange light is lit.  
The system stops to operate.  
The orange light is turned off.  
about three seconds after  
0
The unit beeps three times.  
3S  
The system stops.  
TEMPORARY  
If the system is not required to stop at this time, use the remote control  
and to restart.  
During subsequent operation, the green light is light-  
ing.  
7-7-3. In Case of Power Failure during the  
Timer Operation  
(2) If OFF-TIMER operation is reserved without  
setting of Auto Restart operation, the reservation  
is cancelled with power failure. (The OPERATION  
lamp on the main unit goes on and off to inform of  
power failure.) In that case, try to reserve OFF-  
TIMER operation. When Auto Restart operation  
is set, OFF-TIMER reservation is also cancelled  
with power failure.  
(1) If ON-TIMER operation is reserved with setting of  
Auto Restart operation, it is cancelled with power  
failure. (The OPERATION lamp on the main unit  
goes on and off to inform of power failure.) In that  
case, try to reserve ON-TIMER operation once  
again.  
– 17 –  
8. INSTALLATION PROCEDURE  
8-1. Safety Cautions  
For general public use  
Power supply cord of parts of appliance for Outdoor use shall be more than polychloroprene sheathed flexible  
cord (design H05 RN-F), or cord designation 245 IEC 57.  
CAUTION  
TO DISCONNECT THE APPLIANCE FROM THE MAINS SUPPLY.  
This appliance must be connected to the mains by means of a circuit breaker or a switch with a contact  
separation of at least 3 mm.  
If this is not possible, a power supply plug with earth must be used. This plug must be easily accessible after  
installation. The plug must be disconnected from the power supply socket in order to disconnect the appliance  
completely from the mains.  
DANGER  
` FOR USE BY QUALIFIED PERSONS ONLY.  
` TURN OFF MAIN POWER SUPPLY AND BREAKER BEFORE ATTEMPTING ANY ELECTRICAL WORK.  
MAKE SURE ALL POWER SWITCHES AND BREAKER TURN OFF. FAILURE TO DO SO MAY CAUSE  
ELECTRICAL SHOCK.  
` CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED BY  
WRONG WAY, ELECTRIC PARTS MAY BE DAMAGED.  
` CHECK THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION.  
` DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OF 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 2M.) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT RESISTORS,  
FURNACE, STOVES, ETC..  
` WHEN MOVING THE AIR-CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY  
CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT (R-22) 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 by by-passing 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.  
And make sure the equipment to be earthed.  
• Appliance shall be installed in accordance with national wiring requlations.  
If you detect any damage, do not install the unit. Contact your Toshiba dealer immediately.  
– 18 –  
CAUTION  
• Exposure of unit or water or other moisture before installation will result in an electrical short.  
Do not store 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 user’s neighbors.  
To avoid personal injury, be careful when handling parts with sharp edges.  
• Please read the installation manual carefully before installing the unit. It contains further important  
instructions for proper installation.  
UK Plugs and Sockets etc (Safety) Regulations 1994  
SI Number 1768  
With regard to Schedule 3, Item 7 of the above UK Regulations, this appliance must be permanently connected to  
the fixed wiring of the main electrical supply by means other than the use of an approved 13 Amp plug-top  
as outlined in the Regulations.  
Electrical work must be carried by suitably qualified persons and in accordance with all relevant safety standards  
and codes of practice.  
We recommend that the power supply for this appliance is derived from a suitably protected dedicated circuit.  
(for U.K. only)  
– 19 –  
8-2. Installation Diagram of Indoor and Outdoor Units  
For installation of the indoor unit, use the paper pattern on the back.  
For the rear and left piping  
3
Clip aanchor  
Wall  
Hook  
Hook  
Front cabinet  
Front panel  
1
Installation  
plate  
Insert the remote control holder  
cushion between the indoor  
unit and wall, and lift indoor  
unit to make work easier.  
Hook  
Do not allow the drain hose to  
get slack.  
8
Mounting screw  
Cut the piping hole  
sloped slightly  
5
Shield pipe  
11  
Filter  
6
Pan head  
wood screw  
Make sure to run the drain  
hose sloped downward.  
frame  
9
Deodorizing  
filter  
The auxiliary piping can be  
connected the left, rear left,  
rear, right or bottom.  
4
Remote control  
holder  
10 Purifying  
filter  
2
Wireless  
remote  
control  
Right  
Rear  
Rear left  
Before install the wireless  
remote control  
Left  
Bottom  
Extension  
drain hose  
(Option:  
• With the remote control cover  
open, load the batteries  
supplied correctly, observing  
their polarity.  
Insulation of refrigerant pipes  
insulates the pipes separately,  
not together.  
RB-821SW)  
2 Wireless remote control  
Electric parts  
cover  
7
Batteries  
Loop the connective cable  
(about 100 mm in diameter  
and 300~350 mm long).  
6 mm thick heat resisting  
polyethylene foam  
Cover  
– 20 –  
8-3. Installation  
600mm  
Air inlet  
8-3-1. Optional Parts  
Part  
code  
Parts name  
Q’ty  
Refrigerant piping  
Each  
one  
A
Liquid side : ø6.35 mm  
Gas side : ø9.52 mm  
Pipe insulating material  
(polyethylene foam, 6 mm thick)  
Air outlet  
B
C
1
Fig 8-3-1 Air outlet  
Each  
one  
Putty, PVC tapes  
• Secure the outdoor unit with the anchor bolts if the  
unit is likely to be exposed to a strong wind.  
• Use ø8 or ø10 anchor bolts.  
<Anchor bolt arrangement of outdoor unit>  
8-3-2. Installation Parts  
Part  
No.  
Name of parts  
Q’ty  
Part  
No.  
Name of parts  
Q’ty  
Part  
No.  
Name of parts  
Q’ty  
9
5
6
1
2
Installation plate x 1  
Shield pipe x 1  
Deodorizing filter x 1  
Purifying filter x 1  
Filter frame x 2  
10  
11  
Pan head wood screw  
ø3.1 x 16l x 2  
Wireless remote control x 1  
Clip anchor x 6  
3
4
7
8
Batteries x 2  
Remote control holder x 1  
Mounting screw ø4 x 25l x 6  
This model is not equipped with an extension drain  
hose.  
Others  
Name  
Installation manual  
Owner’s manual  
Option : For the extension drain hose, use an optionally  
available RB-821SW or commercially available one.  
– 21 –  
8-4-1. Cutting a Hole and Mounting  
Installation Plate  
8-4. Indoor Unit  
t Installation place  
<Cutting a hole>  
• A place which provides the spaces around the  
indoor unit as shown in the diagram in section 8-2.  
When installing the refrigerant pipes from the rear  
• A place where there is no obstacle near the air  
inlet and outlet.  
• A place which allows an easy installation of the  
piping to the outdoor unit.  
• A place which allows the front panel to be opened.  
The center of the piping slot  
is the above arrow.  
CAUTION  
The center of the pipe  
• Direct sunlight to the indoor unit wireless  
receiver should be avoided.  
hole is the above arrow.  
Pipe hole  
80mm  
• The microprocessor in the indoor unit should  
not be too close to r-f noise sources. (For  
details, see the owner’s manual.)  
Fig. 8-4-2  
(1) After determining the pipe hole position with the  
mounting plate (80 mm), drill the pipe hole (ø65  
mm) at a slight downward slant to the outdoor side.  
<Remote control>  
• A place where there are no obstacles such as a  
curtain that may block the signal from the remote  
control.  
NOTE :  
• When drilling the wall that contains a metal lath,  
wire lath or metal plate, be sure to use a pipe hole  
brim ring sold separately.  
• 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.  
• The location of the remote control should be  
determined as shown below.  
Anchor bolt hole  
65.5mm  
(Top view)  
Indoor unit  
45˚  
65.5mm  
Pipe  
hole  
1
Pipe hole  
Reception  
Remote  
Installation  
plate  
Thread  
Remote  
control  
Reception  
range  
range  
8 Mounting  
screw  
control  
Indoor unit  
Weight  
*:Axial distance  
Fig. 8-4-1  
Fig. 8-4-3  
– 22 –  
8-4-2. Electrical Work  
<When the installation plate is directly mounted  
on 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 the indoor unit.  
(2) Prepare the power source for exclusive use with  
the air conditioner.  
(2) Install the installation plate horizontally in the wall.  
Plug  
socket  
& fuse  
rating  
Maximum  
running  
current  
(3) To mount the installation plate on a concrete wall  
with anchor bolts, utilize the anchor bolt holes as  
shown in the above figure.  
Model  
Power source  
Wiring  
RAS-  
10SK-E/  
10SA-E  
RAS-  
10SKX/  
10SAX  
50Hz  
*220/230/240V~  
Single-phase  
1mm2  
or  
more  
CAUTION  
7.5 A  
16 A  
When installing the installation plate with mounting  
screw, do not use the anchor bolt hole. Otherwise  
the unit may fall down and result in personal injury  
and property damage.  
* No adjustment is necessary.  
CAUTION  
Installation plate  
(Keep horizontal direction)  
Anchor bolt  
• Use power specified in above table.  
• This appliance can be connected to the mains  
in either of the following two ways.  
Projection  
15mm  
or less  
(1) Connecting the power cord to the main power  
supply provided with a circuit breaker or switch  
with a contact of 3 mm or more.  
5mm dia, hole  
3 Clip anchor  
In this case, an approved circuit breaker or  
switch must be used.  
(2) Attaching a plug to the power cord and pluging  
it in to the wall outlet.  
In this case, an approved power cord and plug  
must be used.  
Mounting screw ø4 x 25  
8
NOTE :  
• Perform wiring works so as to allow a generous  
wiring capacity.  
Fig. 8-4-4  
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  
3
8
mounting screws.  
NOTE :  
• Install the installation plate using 4 to 6 pieces of  
mounting screw securing four corners with screws.  
– 23 –  
8-4-3. Wiring Connection  
Taking out the power cord  
WARNING  
To plug the cable in the plug receptacle, take the  
following precaution.  
Slitted portion  
THIS APPLIANCE MUST BE EARTHED.  
• Cut off the slitted portion in the side face of the  
rear panel to take out the power cord. After  
this, remove burrs, sharp edges, etc., to  
smooth the cut face.  
IMPORTANT  
THE WIRES IN THIS MAINS LEAD ARE COLORED  
IN ACCORDANCE WITH THE FOLLOWING CODE:  
L : Brown  
-LIVE  
L
<How to connect the power cord>  
N : Blue  
-NEUTRAL  
-EARTH  
N
: Green and Yellow  
For the air conditioner that has no power cord,  
connect a power cord to it as mentioned below.  
Fig. 8-4-5  
• After removing the front cabinet, remove the  
terminal cover and the cord clamp.  
As the colors of the flexible cord of this appliance may  
not correspond with the colored markings, to identify  
terminals in your plug, as follows:  
• Connect and secure the power supply cord and  
secure the cord clamp and the terminal cover.  
Connect BROWN colored core to plug terminal marked  
letter "L".  
• Cut the rear panel following the cutting mark and  
put the power supply cord through the notch.  
Connect BLUE colored core to plug terminal marked  
letter "N".  
• Be sure to smooth out the notch with a file, etc.  
Connect GREEN AND YELLOW colored core to plug  
Cord clamp  
Screw  
Terminal block  
Terminal cover  
Power supply  
cord  
terminal marked Earth Symbol "  
".  
<How to remove the front cabinet>  
L
4
N
4
Screw  
2
1
2
1
3
Vertical air flow louver.  
Earth line  
Fig. 8-4-6  
Screw  
Fig. 8-4-7  
How to open the screw cap  
<Stripping length of power cord>  
30mm  
10mm  
• Place your finger on the lower part and push  
up to open the screw cap.  
L
N
(1) Open the screw caps and remove the two screws  
securing the front cabinet.  
10mm  
40mm  
Earth line  
(2) Close the screw caps as behind.  
(3) Open the vertical airflow louver horizontally by  
hand.  
NOTE :  
• Use standard wire only.  
• Wire type: More than H05-RN-F  
(4) Slightly open the lower part of the front cabinet  
then pull the upper part of the front cabinet toward  
you to remove it from the rear plate.  
Fig. 8-4-8  
– 24 –  
<How to connect the connecting cable>  
<Stripping length of connecting cable>  
Wiring of the connecting cable can be carried out  
without removing of the front panel.  
50mm  
Earth line  
10mm  
(1) Remove the front panel.  
Fully open the front panel. Disengage the support  
arm located in the upper center while pushing its  
handle leftwards, and then remove the front panel  
toward you.  
2
1
10mm  
40mm  
(2) Remove the terminal cover and cord clamp.  
For a three conductor cable  
NOTE :  
(3) Insert the connecting cable (according to local  
codes) into pipe hole on the wall.  
• Use stranded wire only.  
• Wire type:More than H05 RN-F  
(4) Take out the connecting cable through the cable  
slot on the rear panel so that it is exploded by  
about 15 cm long in the front side.  
Fig. 8-4-10  
(5) Insert the connecting cable fully into the terminal  
block and secure it by screw tightly.  
<How to install the front cabinet on the indoor  
unit>  
(6) Tightening torque:1.2 N•m (0.12 kgf•m)  
Install the front cabinet through the opposite order of  
"How to remove the front cabinet".  
(7) Secure the connecting cable with the cord clamp.  
(8) Fix the terminal cover and front panel on the indoor  
unit.  
When the panel is removed and mounted again, take  
the following actions:  
After fastening the two screws, one each at the left  
and right of the air outlet, be sure to push the upper  
CAUTION  
center  
center  
right end  
, left end  
and the lower  
1
4
2
3
• Be sure to refer the wiring system diagram  
labeled inside the front panel.  
of the air outlet, and confirm that no gap is  
left between the front cabinet and the rear plate.  
• Check local electrical codes and also any  
specific wiring instructions or limitation.  
• If cooling (dry) operation is made without  
pushing the air outlet, dew can be deposited  
on the front cabinet surface. In addition a gap  
between the front cabinet and the rear plate  
will become wider, spoiling the appearance.  
Terminal block  
Cord  
Terminal  
1
2
clamp  
Push  
3
Push  
1
Push  
2
Connecting  
cable  
cover  
Screw  
Earth  
line  
Screw  
Connecting cable  
4
Screw  
Push  
Fig. 8-4-9  
Fig. 8-4-11  
– 25 –  
8-4-4. Piping and Drain Hose Installation  
<In case of rightward piping>  
To connect pipe after installation of unit (figure)  
(To the forefront of flare)  
• After scribing slits of the front panel and the rear  
panel by a knife or a marking-off pin, cut them by a  
pair of nippers or the like.  
196mm  
Side of liquid flow  
Side of gas flow  
96mm  
Outward form of indoor unit  
Slit (front panel)  
R 30mm (Use polisin or the like for bending pipe.)  
80˚  
Use the handle of screwdriver,etc.  
Slit (rear panel)  
Fig. 8-4-14  
Fig. 8-4-12  
NOTE :  
If the pipe is bent incorrectly, the indoor unit may  
unstably be set on the wall.  
<In case of downward piping>  
• After scribing the slit of the front panel and slit in  
the lower part of the rear panel by a knife or a  
marking-off pin, cut them by a pair of nippers or  
the like.  
After passing the connecting pipe through the pipe  
hole, connect the connecting pipe to auxiliary pipes  
and wrap the facing tape around them.  
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 (front panel)  
Indoor unit  
Slit (rear panel)  
Auxiliary  
pipes  
Connecting  
cable  
Fig. 8-4-13  
Installation  
plate  
<Left-hand connection with piping>  
• Carefully arrange pipes so that any pipe does  
not stick out of the rear plate of the indoor unit.  
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 spring  
bender so as not to crush the pipe.  
• 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.  
Bend the connection pipe within a radius of 30  
mm.  
• 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.  
– 26 –  
8-4-5. Indoor Unit Installation  
8-4-6. Drainage  
(1) Pass the pipe through the hole in the wall, and  
hook the indoor unit on the installation plate at the  
upper hooks.  
(1) Run the drain hose sloping downwards.  
NOTE :  
• Hole should be made at a slight downward slant to  
the outdoor side.  
(2) Swing the indoor unit to right and left to confirm  
that it is firmly hooked up on the installation plate.  
Do not rise the drain hose.  
Do not form the drain hose  
into the wared shape.  
(3) While pressing the indoor unit onto the wall by the  
lower part, hook it up on the installation plate by  
the lower part. Pull the indoor unit toward you by  
the lower part to confirm that it is firmly hooked up  
on the installation plate.  
50 mm  
or more  
Do not put the  
Do not put the drain  
hose end in the  
drainage ditch.  
drain hose end  
(1)  
into water.  
Hook here  
Fig. 8-4-17  
1 Installation  
plate  
(2) Put water in the drain pan and make sure that the  
water is drained outdoors.  
(2)  
Push  
Hook  
(3) When connecting extension drain hose, insulate  
the connecting part of extension drain hose with  
Fig. 8-4-15  
shield pipe.  
5
• For detaching the indoor unit from the installation  
plate pull the indoor unit toward you while pushing  
its bottom up by the specified parts.  
5
Shield pipe  
Drain hose Inside the room  
Extension drain hose  
Fig. 8-4-18  
CAUTION  
Arrange the drain pipe for proper drainage from  
the unit.  
Push  
Push  
Improper drainage can result in damage to  
property.  
Fig. 8-4-16  
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.  
Wall  
Drain guide  
Space for pipes  
Fig. 8-4-19  
– 27 –  
8-5. Outdoor Unit  
CAUTION  
t Installation place  
Installation in the following places may result in  
trouble. Do not install the unit in such places.  
• A place which provides the spaces around the  
outdoor unit as shown in the diagram in page 20.  
• A place full of machine oil.  
• A saline place such as coast.  
• A place full of sulfide gas.  
• A place which can bear the weight of the outdoor  
unit and does not allow an increase in noise level  
and vibration.  
• A place where the operation noise and discharged  
air do not disturb your neighbors.  
• A place where high-frequency waves are likely  
to be generated as from radio equipment,  
welders, and medical equipment.  
• 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 to  
10 m.  
• An allowable head level is up to 5 m.  
• A place where the drain water does not raise any  
problem.  
CAUTION  
(1) Install the outdoor unit without anything  
blodking the air discharging.  
(2) When the outdoor unit is installed in a place  
exposed always to a strong wind like a coast  
or on a high story of a building, secure the  
normal fan operation using a duct or a wind  
shield.  
(3) Specially in windy area, install the unit to  
prevent the admission of wind.  
Strong  
wind  
Fig. 8-5-1  
– 28 –  
8-5-1. Refrigerant Piping Connection  
8-5-2. Vacuum Pumping  
<Flaring>  
AIR PURGE  
(1) Cut the pipe with a pipe cutter.  
Evacuate the air in the connecting pipes and in  
the indoor unit using vacuum pump.  
Do not use the refrigerant in the outdoor unit.  
For details, see the manual of vacuum pump.  
Obliquity Roughness  
Warp  
90˚  
Fig. 8-5-2  
<Use of vacuum pump>  
(1) Connect the charge hose (A) from the manifold  
valve to the charge inlet of the gas side packed  
valve.  
(2) Insert a flare nut into the pipe, and flare the pipe.  
A (mm)  
Outer  
diam.  
A
(2) Connect the charge hose (B) to the port of vacuum  
pump.  
Imperial Rigid  
6.35 mm  
9.52 mm  
1.3 mm 0.7 mm  
1.6 mm 1.0 mm  
(3) Open fully the low pressure side handle of the  
manifold valve.  
Die  
Pipe  
(4) Operate the vacuum pump.  
Fig. 8-5-3  
<Tightening connection>  
(5) Close the low pressure side handle of manifold  
valve after vacuumizing and stop the vacuum  
pump.  
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.  
Continue vacuumizing more than 15 minutes and  
check the pressure gauge indicates –76 cmHg  
(–1.013×105Pa).  
CAUTION  
(6) Open the stems of packed valves A and B all the  
way.  
• Do not apply excess torque. Otherwise, the  
nut may crack depending on the installation  
conditions.  
(7) Securely tighten the stem cap to each of the  
packed valve stems.  
Manifold valve  
(Unit : N·m)  
Additional  
tightening torque  
19.6 (2.0 kgf·m)  
34.3 (3.5 kgf·m)  
High pressure  
Pressure gage  
side handle  
Outer diam.  
Tightening torque  
Low pressure side handle  
Charge hose (A)  
Outdoor unit  
Lo  
Hi  
6.35 mm  
9.52 mm  
15.7 (1.6 kgf·m)  
29.4 (3.0 kgf·m)  
Charge  
hose (B)  
Indoor unit  
Gas  
(ø9.52)  
Half union or packed valve  
Service port  
Flare nut  
A
C
D
VP  
Externally  
threaded  
side  
Internally  
threaded  
side  
Packed  
valve  
B
Liquid  
(ø6.35)  
Use a wrench  
to secure.  
Use a torque wrench  
to tighten.  
Fig. 8-5-4  
Fig. 8-5-5  
– 29 –  
8-5-3. Wiring Connection  
CAUTION  
(1) Remove the electric parts cover from the outdoor  
unit. (1 screw)  
• KEEP IMPORTANT 4 POINTS FOR INSTAL-  
LATION (PIPING WORK)  
(2) Connect the connecting cable to the terminals as  
identified with their respective matched numbers  
on the terminal block of indoor and outdoor units.  
(1) Take away dust and moisture (Inside of the  
connecting pipes.)  
(Strip the sheath of connecting cable with following  
stripping length to and insert into the terminal  
block.)  
(2) Tight connection (between pipes and unit)  
(3) Evacuate the air in the connecting pipes using  
VACUUM PUMP.  
(3) When connecting the connecting cable to 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.  
(4) Check gas leak (connected points)  
<Packed Valve Handling Precautions>  
(4) Insulate the unused cords (conductors) with water  
coming in the outdoor unit. Process them so that  
they do not touch any electrical or metal parts.  
• Open the valve stem all the way out; so not try to  
open it beyond the stopper.  
• Securely tighten the valve stem cap with the  
wrench or like.  
• Valve stem cap tightening torque is as follows;  
Gas pipes side (ø9.52) : 29.4 N•m (3.0 kgf•m)  
Liquid pipe side (ø6.35) : 16.2 N•m (1.7 kgf•m)  
<Stripping length of connecting cable>  
Terminal block  
1
2
60mm  
Terminal  
screw  
Earth line  
10mm  
<A5 mm hexagon wrench is required.>  
Screw  
Earth line  
2
1
Flare nut  
10mm  
50mm  
Connecting  
cable  
Cord clamp  
Stopper  
For a three conductor cable  
5mm  
Valve body  
Valve stem  
Fig. 8-5-7  
Valve stem cap  
CAUTION  
Fig. 8-5-6  
• Wrong wiring connections may cause some  
electrical parts to burn out.  
• Be sure to comply with local code on running  
the wire from the indoor unit to outdoor unit.  
(size of wire and wiring method etc.)  
• Every wire must be connected firmly.  
NOTE :  
• Wipe type : More than H05 RN-F  
– 30 –  
8-6-3. Auto Restart Setting  
8-6. Others  
This product is designed so that, after a power failure,  
it can restart automatically in the same operating mode  
as before the power failure.  
8-6-1. Gas Leak Test  
Flare nut connections (indoor unit)  
C
Information  
D
The product was shipped with Auto Restart  
function in the off position. Turn it on as required.  
Electric parts  
cover  
<How to set the Auto Restart>  
• Press and hold down theTEMPORARY button for  
about 3 seconds. After 3 seconds, the electronic  
beeper makes three short beeps to tell you the  
Auto Restart has been selected.  
Valve stem cap  
connection  
Flare nut  
connections  
(Outdoor unit)  
A
B
• To cancel the Auto Restart, follow the steps  
described in the section Auto Restart Function of  
the Owner's Manual.  
Service cap  
connection  
Valve stem cap  
connection  
Fig. 8-6-1  
• Check the flare nut connections, valve stem cap  
connections and service cap connections for gas  
leak with a leak detector or soap water.  
8-6-2. Test Operation  
To switch the TEST RUN (COOL) mode, press  
TEMPORARY button for 10 sec. (The beeper will  
make a short beep.)  
TEMPORARY  
button  
TEMPORARY  
Fig. 8-6-2  
– 31 –  
9. TROUBLESHOOTING CHART  
TROUBLESHOOTING PROCEDURES :  
• Following details of “What to be pre-checked first”, make sure of the basic items.  
• When there is no trouble corresponding to above, check in detail the faulty parts following “How to judge  
faulty parts by symptoms” later.  
9-1-2. Incorrect Cable Connection between  
Indoor and Outdoor Units  
9-1. What to be Prechecked First  
9-1-1. Power Supply Voltage  
The indoor unit is connected to the outdoor unit with 3  
cables. Make certain that the indoor and outdoor units  
have been connected properly, with terminals assigned  
the same numbers wired to each other. If the connec-  
tors are not connected as specified, the outdoor unit  
will not operate normally.  
The line voltage must be AC 220/230/240V. If the line  
voltage is not within this range, this air conditioner  
may not work normally.  
– 32 –  
9-1-3. Misleading but Good Operations  
(Program Controlled Operation)  
The microcomputer performs the operations listed in  
Table 9-1-1 to control the air conditioner. If a claim is  
made on the operation, check whether it corresponds  
to the contents in the Table 9-1-1. If it does, it is an  
indispensable operation for the control and mainte-  
nance of the air conditioner: it is not a failure of the  
unit.  
Table 9-1-1  
No.  
Operation of air-conditioner  
Description  
1
When the power plug or the power cord The OPERATION lamp flashes, indicating that power is turned  
of the indoor unit is inserted, the on. If this happens, push the START/STOP button once to cause  
OPERATION lamp on the setting the lamp to stop flashing. A power outage also causes the lamp  
indication part flashes.  
to flash.  
2
3
Fan speed remains unchanged in the dry Fan speed is automatically controlled in the dry mode.  
mode.  
Room temperature is in the range under The compressor will not stop while the compressor on hold timer  
which the compressor is turned off, but (3-minutes timer) is actuated.  
the compressor will not stop.  
4
5
6
The compressor will not switch on or off In the dry mode, the compressor goes on and off at regular  
even when the thermo control is operated intervals, independent of the thermo control.  
in the dry operation.  
Compressor does not work though room Compressor does not work while the compressor restart delay  
temperature is in the range of turning the (3-min.) timer is active. The same is true after power is turned  
compressor on.  
on, as the time is still active.  
During automatic operation, the After selection of the cooling and dry operation, the operation  
operation mode changes.  
mode is selected again when the compressor off mode continues  
for 15 min.according to the room temperature. And after selection  
of the dry operation, the condition of the room temperature which  
is Room temp. Set temp.+1 and which is Room temp.<Set  
temp.–4 continues for 15 min., the operation mode is selected  
again.  
7
When the power is turned on, the When the auto restart controlling is selected, the operation is  
operation starts automatically.  
performed automatically in the previous operation mode after  
the power supply has been turned on.  
– 33 –  
9-2-2. Display of Abnormalities and  
Judgement of the Abnormal Spots  
9-2. Primary Judgement of Trouble  
Sources  
The indoor unit of this machine observes the opera-  
tion condition of the air conditioner and displays the  
contents of the self-diagnosis as block displays on  
the display panel of the indoor unit.  
9-2-1. Role of Indoor Unit Controller  
The indoor unit controller receives the operation com-  
mands from the remote control and assumes the fol-  
lowing functions.  
• Measurement of the draft air temperature of the  
indoor heat exchanger by using the thermo sen-  
sor (TA).  
• Louver motor control  
• Control of the indoor fan motor operation  
• Control of the LED display  
• Control of the outdoor unit compressor and the out-  
door fan motor.  
Table 9-2-1  
Block display  
Block display  
A
B
C
D
E
F
OPERATION display flashing (1 Hz)  
OPERATION display flashing (5 Hz)  
OPERATION display flashing (5 Hz)  
OPERATION display flashing (5 Hz)  
OPERATION display flashing (5 Hz)  
Power failure (when power is ON)  
Thermo sensor (TA) short/break  
Heat exchanger sensor (TC) short/break  
Indoor fan lock, abnormality of indoor fan  
Indoor PC board failure  
OPERATION, TIMER and FAN-ONLY display  
flashing (5 Hz)  
• Gas shortage, other refrigerant cycle trouble  
• Heat exchanger sensor open/break/short  
• Overload relay trouble  
(1) Judgement from defective operation or abnormal operation  
Table 9-2-2  
Symptom  
Check  
Primary judgement  
No reaction on  
remote control  
operation  
Turn off the power once, turn it on  
again and try to operate the remote  
control again.  
Remote control is The indoor part (including the  
not possible.  
remote control) is defective.  
Remote control is OK.  
possible.  
The outdoor part is defective.  
(outdoor fan motor)  
The outdoor fan The compressor operates.  
does not rotate  
The inside part is defective.  
The compressor does not operate.  
– 34 –  
(2) Self-diagnosis with remote control  
2) Selecting ordinary mode  
With the indoor unit control, self-diagnosis of pro-  
tective circuit action can be done by turning the  
remote control operation into service mode, oper-  
ating the remote control, observing the remote  
control indicators and checking whether TIMER  
lamp flashes (5 Hz).  
Push the all clear button (ACL) on the rear bot-  
tom of the wireless remote control with a tip of  
pencil for more than 3 seconds. Make sure  
the operation mode display, wind volume dis-  
play, clock display and setting temperature dis-  
play are turned on and “ : ” of the clock display  
is flashing.  
Note :  
<Cautions when doing service>  
• To perform this self-diagnosis, the remote  
control with the service code of 43069666 is  
required.  
1) After completion of servicing, always push the  
all clear (ACL) button to return the operation  
mode to the normal mode.  
2) After completion of servicing by the check  
code, turn off the power once and then turn on  
the power to reset memorized contents of the  
microcomputer to the initial status.  
<How to select remote control operation mode>  
1) Selecting service mode  
Push the switch button provided on rear bot-  
tom of the wireless remote control with a tip of  
pencil for more than 3 seconds. Make sure  
the setting temperature  
is displayed on  
the display and other display is turned off.  
All clear button  
Switch for selecting  
service mode  
ACL  
CLOCK  
ACL CLOCK  
Rear bottom cover  
(Rear bottom of remote control)  
Fig. 9-2-1  
– 35 –  
<Self-diagnosis by check codes>  
c) At the same time, also make sure the op-  
eration lamp is also flashing. This shows  
that the protection circuit on the indoor PC  
board is working.  
1) The self-diagnosis by the check codes is con-  
ducted under the block displays of item B-H in  
Table 9-2-1.  
d) Operate theTEMP.  
key and make sure  
2) Remote control key operation under the ser-  
vice mode is conducted by ON/OFF or TEMP.  
The remote control display by each key op-  
eration is varied as shown below. Two digit  
number is displayed in a hexadecimal num-  
ber.  
the remote control display shows  
and  
flashing of the operation lamp. If the op-  
eration lamp is flashing, it shows the pro-  
tection circuits for connecting cable is work-  
ing or thermal fuse is blown.  
e) In the same way, operate the TEMP.  
3) The self-diagnosis by the check codes is con-  
ducted with procedures shown below.  
key so that the display is increased one  
by one to continue checks by the self-di-  
agnosis as shown in the next table. From  
a) Enter the service mode and make sure the  
off timer display of the remote control shows  
up to  
check operations of  
.
protection circuits for each block, and  
b) Operate the “ON/OFF” key and make sure  
the timer lamp on the display section is  
flashing (5 Hz).  
to  
check operations of the  
typical protection circuits.  
Table 9-2-3  
Indication after operation  
Operating key  
ON/OFF  
1 is added to data before operation.  
(Example)  
TEMP.  
(Up)  
1 is subtracted from data before operation.  
(Example)  
TEMP.  
(Down)  
10 is subtracted from data before operation.  
(Example)  
“AUTO” LOUVER  
“SET” LOUVER  
Data before operation is directly transferred.  
(Example)  
– 36 –  
Table 9-2-4  
Block level  
Diagnosis function  
Air  
Judgment and action  
Check  
code  
Check  
code  
Conditioner  
Block  
Symptom  
Condition  
status  
1. Check thermo sensor.  
Indoor PC  
board  
Thermo sensor  
short/break.  
Continued Indicated when  
operation detected abnormal  
2. If it is OK, check PC board.  
Heat exchanger  
sensor short/break. operation detected abnormal  
Continued Indicated when  
1. Check heat exchanger  
sensor.  
2. If it is OK, check PC board.  
Indoor fan lock,  
abnormality of  
indoor fan.  
All off  
Indicated when  
detected abnormal  
1. Disconnect the power plug  
from AC outlet, and pull out  
the connector (CN10) for the  
motor, then connect the plug  
of AC power cord again and  
turn the power on.  
2. Check the voltage between  
pin 1 and 2 of the connector  
(CN10).  
3. If the output voltage is 35V,  
PC board is OK, check  
motor.  
Abnormality of  
other indoor unit PC  
board.  
All off  
All off  
Indicated when  
detected abnormal  
Replace PC board.  
1) Gas shortage.  
(gas leak)  
Indicated when  
detected abnormal  
Refrigerant  
system  
1. Check gas quantity.  
(check gas leakage)  
2) Other refrigerant  
cycle trouble.  
2. If it is OK, check heat  
exchanger sensor.  
3) Heat exchanger  
sensor off/break/  
short.  
3. If heat exchenger sensor is  
OK. check overload relay and  
thermostat for compressor.  
4) Overload relay  
4. If overload relay is OK, check  
refrigerant cycle.  
5. If refrigerant cycle is OK,  
check PC board.  
Contents detected by the check codes “  
” to “  
” are stored in memory of the microcomputer even if the power  
supply is turned off. Therefore, contents of operations in the past are all displayed.  
– 37 –  
9-3. Troubleshooting Flowcharts  
9-3-1. Power can not be Turned on (No Operation at All)  
<Preliminary checks>  
(1) Is the supply voltage normal?  
(2) Is the connection to the AC output OK.?  
Operation  
Check Items  
Main cause  
Shut off the power supply  
from AC outlet once and  
turn it on after 5 seconds.  
Countermeasure  
Symptom  
NO  
Does the OPERATION  
lamp flash?  
YES  
Does the power turn  
on by pushing the  
[START/STOP] button  
of the remote control?  
Does the transmission  
indicator of remote  
control flash normally and  
transmit certainly?  
NO  
NO  
Remote control  
is defective.  
YES  
YES  
(No problem)  
Replace the  
remote control.  
Parts (R21, R109, SG01,  
C15, C01, DB01, C02,  
IC01, T01) are defective.  
YES  
YES  
Does the fuse  
(F01) blow?  
NO  
Wrong wiring of  
AC cord or connecting  
cable is defective.  
Does the thermal  
fuse blow?  
(Under PF. Terminal)  
Replace the  
thermal fuse set.  
Check connection.  
NO  
Is the indication voltage  
(DC12V or 5V) of main  
PC board correct?  
NO  
YES  
Replace the main  
PC board.  
PC board  
is defective.  
Is the voltage  
across C02 measured  
DC310V~340V?  
Refer to the paragraph  
"Pre-check", or defective circuit  
before power PC board block.  
NO  
NO  
YES  
Shut off the power  
Is the secondary  
voltage of SW trans-  
former (T01) measured  
DC35V, DC12V,  
Is the secondary  
SW transformer  
(T01) or IC (IC01)  
for power supply  
is defective.  
supply once, and turn  
it on again after dis-  
connecting the motor  
voltage of SW  
transformer measured  
DC35V, DC12V,  
and DC7V?  
NO  
Replace the main  
PC board.  
connector CN10  
.
and DC7V ?  
*
YES  
YES  
Motor is defective.  
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.  
*
– 38 –  
9-3-2. Power can not be Turned on after Replacing Indoor PC Board  
<Checking Procedure>  
Connect the AC  
Power supply  
Return the wiring of the  
power relay is returned to  
the normal procedure.  
NO  
NO  
Is it wired as shown  
in Figure below?  
Does the OPERATION  
lamp flash?  
YES  
YES  
To the paragraph of  
“No Power turns on”.  
Black  
White  
Blue  
Brown  
C02  
RY01  
1
2
N
L
Indoor  
terminal  
block  
Power  
terminal  
block  
PC board  
RY02  
T02  
9-3-3. Outdoor Unit does not Operate  
Shut off the power supply  
from AC outlet once and  
turn it on after 5 seconds.  
NO  
Does the OPERATION lamp flash?  
See "Power can not be turned on".  
See "Power can not be turned on".  
YES  
Does the power turn on by  
NO  
pushing the [START/STOP] button  
of the remote control?  
YES  
Is AC220/230/240V  
NO  
Replace the  
PC board.  
Relays (RY01, RY02)  
or IC31 or IC30 is failure.  
supplied between terminal block  
1 - 2 ?  
YES  
Is cable connection  
NO  
Correct cabling between  
indoor and outdoor units.  
between indoor and outdoor  
units correct?  
YES  
Check items as following procedure  
in 9-3-4, 9-3-5, 9-3-6.  
– 39 –  
9-3-4. Only Compressor does not Operate  
Shut off the power supply  
from AC outlet once and  
turn it on after 5 seconds.  
NO  
Does the OPERATION lamp flash?  
See "Power can not be turned on".  
See "Power can not be turned on".  
YES  
Does the power turn on by  
NO  
pushing the [START/STOP] button  
of the remote control?  
YES  
NO  
NO  
Is the voltage across the indoor terminal  
( 1 - 2 ) 220/230/240 VAC?  
Replace the  
PC board.  
Relays (RY01, RY02)  
or IC31 or IC30 is failure.  
YES  
Is cable connection between indoor  
and outdoor units correct?  
Correct cabling between indoor  
and outdoor units.  
YES  
NO  
NO  
Is the voltage across the outdoor terminal  
( 1 - 2 ) 220/230/240 VAC?  
Cables between indoor and  
outdoor units are defective.  
YES  
Re-wire or replace the defective cords.  
Compressor is defective.  
Are all the cords for compressor normal?  
YES  
NO  
Is the compressor motor winding normal?  
(Check the winding resistor.)  
YES  
NO  
NO  
NO  
Capacitor is defective.  
Overload relay is defective.  
Compressor is defective.  
Is the capacitor for compressor normal?  
YES  
Is the overload relay normal?  
YES  
Does the compressor start?  
YES  
Compressor starts but  
it stops after a while?  
YES  
NO  
Is the gas quantity normal?  
(Check the pressure)  
Gas shortage (Gas leakage)  
YES  
Compressor is defective  
– 40 –  
9-3-5. Only Outdoor Fan does not Operate  
Shut off the power supply  
from AC outlet once and  
turn it on after 5 seconds.  
NO  
Does the OPERATION lamp flash?  
See "Power can not be turned on".  
See "Power can not be turned on".  
YES  
Does the power turn on by  
NO  
pushing the [START/STOP] button  
of the remote control?  
YES  
NO  
NO  
Is the voltage across the indoor terminal  
( 1 - 2 ) 220/230/240 VAC?  
Replace the  
PC board.  
Relays (RY01, RY02)  
or IC31 or IC30 is failure.  
YES  
Is cable connection between indoor  
and outdoor units correct?  
Correct cabling between indoor  
and outdoor units.  
YES  
NO  
NO  
Is the voltage across the outdoor terminal  
( 1 - 2 ) 220/230/240 VAC?  
Cables between indoor and  
outdoor units are defective.  
YES  
Are all the cords for outdoor  
fan motor normal?  
Correct the wire or  
replace the defective cords.  
YES  
NO  
NO  
Is the outdoor fan motor winding normal?  
(Check the winding resistance)  
Outdoor fan motor is defective.  
YES  
Capacitor for outdoor  
fan motor is defective.  
Is the capacitor for compressor normal?  
YES  
Outdoor fan motor is defective.  
– 41 –  
9-3-6. Only the Indoor Fan does not Operate  
< Check procedure >  
Shut off the power  
supply once.  
Turn the power supply.  
Does the fan  
NO  
Replace the PC board.  
stop in no operating  
status?  
Control PC board is defective.  
YES  
Start the operation  
with low fan setting  
in cool operation.  
Is the voltage  
measured DC35V  
between 1 (red lead wire, +)  
and 2 (black lead wire, –)  
of the motor connector  
(CN10) ?  
Shut off the power supply,  
and turn it on after  
disconnecting the motor  
NO  
NO  
Does the fan rotate?  
YES  
connector (CN10) from  
*
the PC board.  
YES  
Shut off the power supply.  
Change the setting of  
cooling to high fan.  
Repair the  
bearing of  
the drain fan.  
Does the cross  
NO  
flow fan rotate  
normally?  
YES  
Turn on the power supply.  
Is the voltage of  
DC35V measured  
between 1 (red lead wire, +)  
and 2 (black lead wire, –) of  
the motor connector  
(CN10) ?  
NO  
Replace the  
PC board.  
NO  
Operation  
stops  
Does the fan speed  
become higher?  
YES  
Is the rotation signal  
YES  
(DC+5V-0V) output between 4  
(blue lead wire) and 2 (black  
lead wire) of the motor connector  
(CN10) when rotating the cross  
flow fan by hand in no operating  
status ? (2 pulses/one turn)  
NO  
YES  
Replace the control  
PC board.  
Replace the  
fan motor.  
Normal  
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.  
*
– 42 –  
9-4. How to Check the Remote Control (Including the Indoor PC Board)  
There is no beep from  
the indoor unit.  
Push the START/STOP button. The operation lamp of  
the air conditioner main  
unit does not light.  
NO  
Does the transmission  
indicator flash?  
YES  
Short-circuit the metal  
terminal at the side of the  
battery compartment  
(all-clear terminal) with a pencil.  
(wait about 10 seconds)  
Is there direct  
sunlight on the  
receptor of the  
air conditioner?  
NO  
YES  
Is operation  
possible when the  
transmitter is moved  
nearer to the infrared  
signal receiver of the  
air conditioner?  
Is there any  
thyristor  
fluorescent light  
near by?  
NO  
NO  
Push the START/  
STOP button  
YES  
YES  
Battery life  
Does the  
NO  
Is operation  
transmission  
possible when setting  
the temporary switch of the  
air conditioner main unit to  
"TEST RUN" or  
indicator light?  
NO  
YES  
"TEMPORARY AUTO"?  
Is there any  
NO  
YES  
beep and  
operation?  
YES  
Can any signal tone  
be heard in a transistor  
radio when transmitting  
within 5cm distance  
from the radio?  
NO  
YES  
Remote control  
PC Board is failure.  
is failure.  
Keep the air  
conditioner away  
from thyristor  
Avoid direct  
sunlight.  
Replace remote  
control.  
Replace the  
batteries  
Replace  
PC board.  
Normal  
fluorescent light.  
After battery replacement,  
Note:  
shortcircuit the metal terminal at  
the side of the battery compartment  
(all-clear terminal) with a pencil.  
– 43 –  
9-4-1. How to Check the PC Board  
(1) Operating precautions  
(2) Inspection procedures  
1) When a PC board is judged to be defective,  
check for disconnection, burning, or discolora-  
tion of the copper foil pattern or this PC board.  
1) When removing the front panel or the PC  
board, be sure to shut off the power supply.  
2) The PC board consists of the following 2 parts  
2) When removing the PC board, hold the edge  
of the PC board and do not apply force to the  
parts.  
a. Main PC board part:  
Power relay, indoor fan motor drive circuit  
and control circuit, C.P.U.and peripheral cir-  
cuits, buzzer drive circuit and buzzer.  
3) When connecting or disconnecting the connec-  
tors on the PC board, hold the whole housing.  
Do not pull at the lead wire.  
b. Infrared rays receive and indication  
parts:  
Infrared rays receive unit and LED.  
– 44 –  
(3) Checking procedure  
Table 9-4-1  
No.  
Procedure  
Check Point (Symptom)  
Causes  
1
Shut off the power supply and  
remove the PC board assembly  
from the electronic parts base.  
Remove the connecting cable from  
the terminal block.  
1. Is the fuse blown?  
1. * Application of shock voltage.  
* Overload by short-circuit of the  
parts.  
2
Remove the connector for the  
motor, and turn the power on.  
Voltage check  
1. Between TP1 and TP2  
(220/230/240V AC)  
2. Between TP2 and pin 1 of CN04 2. Fuse is defective.  
(220/230/240V AC)  
1. * AC power cord is defective.  
* Poor contact of the terminal plate.  
* Miss wiring of the power relay.  
If the OPERATION lamp flashes  
(0.5 sec. :ON, 0.5 sec. :OFF) when  
the power turning on, the checking  
points described as 1-5 of right  
column are not necessary to  
perform.  
3. Operation of the thermal fuse.  
3. Between TP2 and pin 3 of CN04 4. * Capacitor (C01, C15) is defective.  
(220/230/240V AC)  
* Line filter (L01) is defective.  
* Resistor (R01) is defective.  
* Diode (DB01) is defective.  
5. IC01, IC02, T01 are defective.  
6. IC01, IC02, T01, F03 are defective.  
7. IC01, IC02, T01, F02, Q29, IC03  
are defective.  
4. Between + and - of C02  
(310 ~ 340V DC)  
5. Between 35V and GND  
6. Between 12V and GND  
7. Between 5 V and GND  
3
Voltage check  
1. Voltage of relay coil. (DC 12V)  
Between pin 10 of IC31 and GND  
Between pin 11 of IC31 and GND  
2. Between No. 1 and 2 of connecting  
cable terminal block.  
1. Breaking wire of the relay coil,  
defective relay driver. (IC31)  
2. Poor contact of relay.  
Make the operation status by  
pushing once the START/STOP  
button, except the status of [FAN  
ONLY], [ON TIMER].  
(220/230/240V AC)  
4
5
1. All indicators light for 3 sec..  
2. Indicators do not indicate normally  
after approximate 3 sec..  
Start the operation with the system  
which the time of the restart delay  
timer is shortened.  
Defective indicator, or poor  
housing assembly. (CN13)  
1. Compressor does not operate.  
2. OPERATION lamp flashes.  
1. The temperature of the indoor heat  
exchanger is abnomally lower.  
2. Poor contact of the heat exchanger  
sensor. (The connector is  
disconnected.) (CN01)  
3. Heat exchanger sensor, main PC  
Make the operation status by pressing  
once the START/STOP button.  
1. The time of the restart delay timer  
is shortened.  
2. Cool operation  
3. Air volume [AUTO]  
4. Make the setting temperature lower  
enough than room temperature.  
5. Continuous operation.  
board are defective.  
(Refer to Table 9-4-2 for the judgment  
of defective resistance values.)  
4. Main PC board is defective.  
1. The temperature of the heat  
exchanger is abnormally high.  
2. The heat exchanger sensor  
connector has short-circuit. (CN01)  
3. The heat exchanger sensor is  
defective.  
6
1. Compressor does not operate.  
2. OPERATION lamp flashes.  
The status of No. 5 is continued,  
and make the following condition.  
1. Heat operation  
2. Make the setting temperature  
higher enough than room  
temperature.  
(Refer to Table 9-4-2 for the judgment  
of defective resistance values.)  
4. PC board is defective.  
1. Indoor fan motor is defective.  
(Protecting operation on the PC  
board.)  
2. Poor contact of the motor  
connector.  
7
1. The voltage of DC 35V is not  
measured between the red and  
black of the motor terminals.  
2. Motor does not rotate.  
(The key operation is accepted.)  
3. The motor rotates, but it vibrates  
too much.  
Turn the power on after connecting  
the motor connector.  
Start the operation with the following  
condition.  
1. Operation [Cooling]  
2. Airflow [High fan]  
3. Continuous operation  
3. PC board is defective.  
– 45 –  
9-4-2. PC Board Layout  
Top View  
Bottom View  
– 46 –  
Table 9-4-2 Approximate value of the sensor (thermistor) resistance (TA,TC)  
Temperature  
(= k)  
30°C  
0°C  
10°C  
20°C  
25°C  
Sensor  
Themo Sensor  
35.8  
20.7  
12.6  
10.0  
7.92  
9-4-3. How to Reduce the Operation Time of  
the Anti-Restart Timer  
Wireless remote control  
• Attach the diode (1S1555 or equivalent) to the rivet  
inside the unit through holes on the rear of the  
wireless remote control unit.  
• Push the START/STOP button to start operation  
with the diode attached.  
Timer short diode  
Fig. 9-4-1  
– 47 –  
10. PART REPLACEMENT  
10-1. Indoor Unit (RAS-10SK-E, RAS-10SKX)  
No.  
Part name  
Front panel  
Procedure  
Remarks  
1) After stopping the operation of the air conditioner, be  
sure to turn off the circuit breaker or disconnect the  
power plug from the AC wall socket.  

2) Open the screw caps and remove the two screws  
fixing the front panel.  
3) Close the screw caps as they were.  
4) Open the horizontal louver right below by your  
finger.  
5) Open the lower side of front panel until it touches  
the horizontal louver, and remove it from the indoor  
unit by turning it.  
<To assemble the front panel>  
1) Fix the two screws to secure the front panel.  
2) Close the screw caps as they were.  
3) Press four places where are the center, right end,  
left end and lower portions of the air outlet.  
4) Check the gap between the front panel and the main  
unit.  
If cooling or drying operation is performed without  
pressing the center of the air outlet, the surface of  
the front panel may be covered with frost and have  
a waterdrop.  
Electrical part  
assembly  
1) Perform the process  above.  
2) Remove the screw securing the shield metal plate.  
3) Remove the electrical part cover by pressing the nail  
located on upper portion of the electrical part cover.  
4) Remove the drain guide.  
5) Remove the screw securing to the end plate of the  
heat exchanger.  
6) Remove the connector (5p) for the fan motor and  
the connector (6p) for the louver motor from the  
microcomputer assembly.  
7) After unhooking the electrical part base by pressing  
the fixing nail located on its lower portion, draw the  
electrical part base out toward you to remove it from  
the main unit.  
8) Pull the TC sensor out from the holder of the heat  
exchanger.  
9) Dress the connecting cable securely as shown in the  
right illustration.  
(Improper dressing will cause water leakage.)  
Drain-pan  
assembly  
1) Perform the process above.  
ƒ
2) Remove the drain-pan by pressing the four hooks  
downwards.  
(Keep it with the drain hose.)  
– 48 –  
No.  
Part name  
Procedure  
1) Perform the process .  
Remarks  
Horizontal grille  
Note:  
2) Remove the screw fixing the louver motor, and  
remove the louver motor.  
The horizontal  
grille can not be 3) Remove the shaft of the horizontal grille from the  
removed without  
removing the  
louver motor.  
drain-pan.  
Heat exchanger 1) Perform the process ƒ.  
2) Remove the pipe holder from the rear side of main  
unit by removing the screw.  
3) Unhook the hooks fixing the left side of the heat  
exchanger and remove the screw fixing it, then  
remove the right side of the end plate from the rib  
fixing the main unit by sliding the heat exchanger  
slightly to the right side.  
Cross flow fan  
1) Perform the process ƒ.  
2) Loosen the set screw of the cross flow fan.  
3) Remove the screw fixing the shaft bearing base.  
4) Lift slightly up the left side of the heat exchanger,  
and pull the shaft bearing base out left downwards.  
When assembling it, fix it with the set screw on the  
position where the gap between the rear plate surface  
and the left end surface of the cross flow fan is 6 ~  
7mm.  
Shaft bearing  
1) Perform the process above.  
ˆ
2) Remove the shaft bearing from the shaft bearing base.  
<Caution for assembling>  
• If a part of the shaft bearing is protruded from the  
housing, assemble it after pushing its portion into  
the correct position in the housing.  
Fan motor  
1) Perform the process above.  
2) Perform the process -2) above.  
3) Remove the left and right motor bands.  
4) Remove the fan motor after pulling the cross flow  
fan out sliding it left and right.  
– 49 –  
10-2. Microcomputer (RAS-10SK-E, RAS-10SKX)  
No.  
Part name  
Procedure  
Remarks  
Common  
procedure  
1) Turn the power supply off to stop the operation of  
Replace the thermal fuse, terminal  

air-conditioner, and disconnect the power cord from block, power cord, microcomputer  
the AC supply.  
ass’y and the power supply PC  
board ass’y.  
2) Remove the front panel.  
• Remove the two fixing screws. (φ4 x 14  
3) Remove the electrical part base.  
)
Thermal fuse  
replacement  
1) Perform the process  above.  
2) Remove terminal cover (Up), (Down).  
3) Disconnect the terminal blocks connected with the  
connecting cable, and the power cord from base E-  
parts by removing the screws.  
4) Remove the thermal fuse (77°C) from base E-parts.  
– 50 –  
10-3. Outdoor Unit (RAS-10SA-E, RAS-10SAX)  
No.  
Part name  
Procedure  
Remarks  
Common  
procedure  
1) Stop the operation of air-conditioner, and disconnect  
the power cord from the AC supply.  

2) Remove E-parts cover.  
(1- ST1T ø4 x 10  
)
3) Remove the cord clamp (2- ST2T ø4 x 12 ) and  
remove the connecting cable.  
4) Remove the front cabinet. (7- ST1T ø4 x 10 with  
nylon washer)  
• Pull the front lower portion toward you, and remove  
it pulling out upward.  
1) Remove the fixing screw securing the capacitor  
band.  
Capacitor for  
compressor  
Refer to [Electrical parts list and  
location] in page 55.  
(1- ST2T ø4 x 8  
)
2) Remove the cable connected to the terminal.  
Capacitor for fan 1) Remove the fixing screw.  
Same as above.  
ƒ
motor  
(1- ST2T ø4 x 8  
)
2) Remove the cable connected to the terminal.  
Overload relay  
1) Perform the process  above.  
2) Remove terminal cover of compressor.  
3) Remove OL holder and pull OL relay up.  
4) Remove Fustons of leads.  
– 51 –  
11. CAUTIONS ON REPLACEMENT OF PC BOARD ASSEMBLY  
1. Set the switch (SW03) provided on the PC board as follows.  
ON  
1
2
3
4
5
6
1
2
3
4
5
6
ON  
OFF  
ON  
OFF  
2. Don?t wind the black lead wire around the current trans. (CT. T02)  
Black  
White  
Blue  
Brown  
C02  
RY01  
1
2
N
L
Indoor  
terminal  
block  
Power  
terminal  
block  
PC board  
RY02  
T02  
– 52 –  
12. EXPLODED VIEWS AND PARTS LIST  
12-1. Indoor Unit (1)  
406  
404  
403  
401  
407  
408  
402  
405  
401  
Location  
No.  
Part  
No.  
Location  
Part  
No.  
Description  
Description  
No.  
401  
402  
403  
404  
43T60002 Base, Terminal  
3P, AC 300V, 20A  
405  
43T69007 PC Board, WRS-LED  
MCC-635  
43T69004 Sensor, Heat Exchanger  
406  
407  
43T69008 PC Board MCC-713  
43T61001 Base, E-Parts  
ABS, Black, UL94-5V  
43T62006 Base, Shield  
SGCC-Z08-LUB  
10k, 25°C  
43T69005 Sensor, Thermostat  
10k, 25°C  
408  
43T60004 Fuse, Temperature 77°C  
– 53 –  
Indoor Unit (2)  
233  
230  
231  
228  
229  
222  
221  
215  
216  
217  
211  
214  
210  
232  
201  
202  
223  
226  
227  
236  
225  
241  
220  
218  
219  
206  
224  
235  
207  
212  
213  
239  
209  
208  
234  
237  
205  
240  
203  
204  
242  
238  
Location  
No.  
Part  
No.  
Location  
No.  
Part  
No.  
Description  
Description  
201  
202  
203  
204  
205  
206  
207  
208  
208  
209  
210  
43T00002 Front Panel Assembly  
43T00003 Suction Grille  
43T80001 Air Filter (L)  
43T80002 Air Filter (R)  
43T80003 Frame Filter  
43T07004 Screw Cap (L)  
43T07003 Screw Cap (R)  
43T08007 LED Panel (10SK-E)  
43T08005 LED Panel (10SKX)  
43T19004 Accepted Signal Filter  
43T09003 Horizontal Louver Assembly  
for Service  
43T09004 Louver Assembly  
43T70001 Drain Hose Assembly  
43T21003 Motor Stepping  
43T07001 Bushing  
221  
222  
223  
224  
225  
226  
227  
228  
229  
230  
231  
232  
233  
234  
234  
235  
236  
237  
238  
239  
240  
241  
242  
43T49005 Plate of EVA-SEAL  
43T49006 Holder for Plate of EVA-SEAL  
43T49004 Rubber of Sound Insulation  
43T79002 Drain Guide  
43T39002 Motor Band (Left)  
43T39001 Motor Band (Right)  
43T21005 Fan Motor  
43T20007 Fan, Cross Flow  
43T22002 Bearing  
43T39003 Base, Bearing  
43T03001 Rear Plate  
43T07002 Pipe Holder  
211  
212  
213  
214  
215  
43T82001 Installation Plate  
43T85004 Owner’s Manual (10SK-E)  
43T85006 Owner’s Manual (10SKX)  
43T11001 Pipe Shield  
43T69009 Remote Control  
43T63002 Holder, Remote Control  
43T62008 Cover, E-Parts  
43T62002 Terminal Cover (Up)  
43T62005 Terminal Cover (Down)  
43T62003 Cord Clamp  
43T44003 Refrigerantion Cycle  
Assembly  
216  
217  
218  
219  
220  
43T47006 Pipe, Delivery  
43T47005 Pipe, Suction  
43T49007 Pipe, Shield  
43T19003 Holder, Sensor  
43T49003 Spring  
43T62004 Shield Cover  
– 54 –  
12-2. Outdoor Unit  
24  
25  
16  
23  
6
5
17  
4
8, 9  
10, 11  
13  
19  
3
20  
21  
14  
2
22  
7 : CAPILLARY TUBE  
26 : DRYER  
1
Location  
No.  
Part  
No.  
Location  
No.  
Part  
No.  
Description  
Description  
1
2
43T19001 Guard Fan  
16  
17  
19  
20  
21  
43T19005 Handle  
43T20001 Fan, Propeller  
43005037 Front Cabinet  
43T43004 Condenser  
43T49001 Rubber-Cushion  
43T19002 Stopper, Guard  
43T63001 Holder, OL-Relay  
43054408 Relay, Over-Load  
J-MRA 99285-9201  
3
4
5
43062193 Cover, E-Parts  
43005038 Back Cabinet  
6
7
43T47008 Capillary-Tube 1.5 DIA  
43T46001 Packed Valve, 9.52  
43T47002 Bonnet, 9.52 DIA  
43T46002 Packed Valve, 6.35  
43T47003 Bonnet, 6.35 DIA  
43T21001 Fan-Motor UE6-21SJ5P  
43T47001 Flange, Nut  
22  
23  
43T41402 Compressor, PH102T1-4C  
43055483 Capacitor Plastic, Comp  
25µF 400V  
43T55001 MF Capacitor 1.5µF, 500V  
43T60006 Base,Terminal , 3P  
43045073 Dryer  
8
9
10  
11  
13  
14  
24  
25  
26  
– 55 –  

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