Service manual
21
NOTES:
1. Since the indoor fan motor (MF) is connected with 220V power, using 230, 240V power will require a setting change of the dip switch (SW1<I.B>) on the
indoor controller board as shown is fig:
w
1.
Indoor fan motor (MF) for 230,240V.
2. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
3. Since the indoor transformer (T) is connected with 220V power, if 230,240V power is used. Change the wiring connection showing fig * : 2.
When power supply is
4. Symbols used in wiring diagram above are, : Connector, : Terminal block.
5. Emergency operation
If remote controller of microcomputer fails but there is no other trouble, emergency operation is possible by setting dip switch (SW3<I.B>) on the indoor con-
troller board.
[Check items]
(1) Compressor and fan.
(2) Check the trouble position using self diagnostic function. If the result of self diagnosis indicates protective device such as freeze protection is functioning
emergency operation is not possible unless the cause is removed.
Emergency operation will be continuous operation mode due to power ON/OFF (ON/OFF with remote controller is not possible).
[Emergency operation procedure]
(1) Set the dip switch (SW3<I.B>) on the indoor controller board to • on and off for cooling.
(2) Turn on outdoor unit side circuit breaker, then indoor unit side circuit breaker in this order.
(3) During emergency operation indoor fan runs at high speed but automatic vane remains stop.
(4) Thermostat will not function.
(5) Emergency cooling should be limited to 10 hours maximum.
(The indoor unit heat exchanger may freeze).
3
21
fig
w
2
fig
w
1
220V
230V
240V
230V
220V
YELLOW
ORANGE
RED
1
ON
OFF
2
3 4 5 6 7 8
1
ON
OFF
2
3 4 5 6 7 8
SW1 SW1
SYMBOL
C
CN2<I.B>
CN2A<I.B>
CN2B<I.B>
CN23<I.B>
CN27<I.B>
CN28<I.B>
CN51<I.B>
F1,2<I.B>
I.B
JR
NAME
FAN MOTOR CAPACITOR
TIMER ADAPTOR CONNECTOR
TRANSMISSION WIRES No.1 CONNECTOR
TRANSMISSION WIRES No.2 CONNECTOR
DRAIN LEFT-UP MECHANISM
VANE POSITION CONNECTOR
TIME SHORTENING CONNECTOR
MULTIPLE CONNECTOR
FUSE(6.3A 250V)
INDOOR CONTROLLER BOARD
FUNCTION SELECTOR JUMPER RESISTORS
SYMBOL
MF
MV
RT1
RT2
Ru<W.B>
SW1<I.B>
SW2<I.B>
SW3<I.B>
T
NAME
FAN MOTOR
VANE MOTOR
ROOM TEMPERATURE THERMISTOR
(0%/15k",25°C/5.4k" DETECT)
PIPE TEMPERATURE THERMISTOR
(0%/15k". 25%/5.4k" DETECT
RECEIVING UNIT
FUNCTION SWITCH
UNIT SELECTOR SWITCH
EMERGENCY OPERATION SWITCH
TRANSFORMER
SYMBOL
TB2
TB4
X4<I.B>
ZNR
SW1<W.B>
LD1<W.B>
W.B
W.R
NAME
POWER SUPPLY TERMINAL BLOCK
INDOOR/OUTDOOR CONNECTING WIRE
TERMINAL BLOCK
FAN MOTOR RELAY
VARISTOR
ON/OFF SWITCH
RUN INDICATOR LED
WIRELESS REMOTE CONTROLLER BOARD
WIRELESS REMOTE CONTROLLER
PK-2.5FLA
2
, PK-2.5FLA
3
, PK-2.5FLA
4
PK-3FLA
2
, PK-3FLA
3
, PK-3FLA
4
, PK-3FLA
5
PK-4FLSA
2
, PK-4FLSA
3
, PK-4FLSA
4
X4
SW1
OFF
ON
12345678
OFF
ON
12345678
PK-4FLSA
PK-2.5FLA
PK-3FLA
MODELS
REMOTE
CONTROLLER
65432
RT2
2
SW1
CN27
D.U.M
1
JR
N
GRN/YLW
L
I.B
TO OUTDOOR UNIT
CONNECTING WIRES
DC12V
1
T
X4
ZNR
F2 F1
C
MF
MV
CNB
LD1
Ru
SW1
54321
1
1
6
7
1
1
43
2
35
3
211 133
FAN1
POWER
OUTDOOR
TIMER
WIRELESS
TRANS
VANE
L.TEST
CN2A
TWIN-1
CN2B
TWIN-2
TRANS
CND
CN30
CN2
CN70
CN6V
CN4T
CN28
CNT
DRAIN
CN50
INTAKE
CN20
PIPE
CN21
CN51
MULTIPLE
1122
SW2
SW3
ON
ON
OFF
OFF
123
12345678 12345
RT1
7
W.R
TB4
6
W.B
TB2
ORN
YLW
BRN
BRN
RED
RED
240V
14.5VAC
10.6VAC
230V
220V
BLU
YLW
WHT
RED
BLK
WHT
RED
POWER SUPPLY
~(1 PHASE)
AC220-240V 50Hz
AC220V 60Hz
YLW
ORN
RED
7
OC129A-1.qxp 01.10.1 7:33 PM Page 21