Mitsubishi Electric PK12FK Technical & Service Manual page 23

PK18, 24, 30, 36FK
MF
C
I.B
FAN1 1 3 5
X4
X4
J5
SW2
ON
OFF
123456
4
SYMBOL
C FAN MOTOR CAPACITOR
CN1<R. B> PROGRAM TIMER CONNECTOR
CN2<R. B> REMOTE SWITCH CONNECTOR
CN2L<I. B> LOSSNAY CONNECTOR
CN27<I. B> DRAIN LIFT-UP MECHANISM CONNECTOR
CN51<I. B> CENTRALLY CONTROL CONNECTOR
F1. 2<I. B> FUSE (6A 250V)
I. B INDOOR CONTROLLER BOARD
J1 MODE SELECTOR JUMPER RESISTORS
J5 MODEL SELECTOR JUMPER RESISTORS
J9 MODEL SELECTOR JUMPER RESISTORS
LCD<R. B> LIQUID CRYSTAL DISPLAY
LED1<I. B> LED (DC 12V POWER)
LED2<I. B> LED (DC 5V POWER)
MF FAN MOTOR
MV VANE MOTOR
R. B REMOTE CONTROLLER BOARD
NOTES :
1. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
2. Indoor and outdoor connecting wires are made with polarities. Make wiring matching terminal numbers.
3. Symbols used in wiring diagram above are, ¤¤ : Connector. / : Terminal block.
4. Emergency operation
If remote controller or 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) Make sure that no other trouble exist the outdoor unit. Trouble with the outdoor unit prevents emergency operation. (If any trouble exists the outdoor unit error
code "PB" will be displayed on the remote controller and the trouble position will e shown on the outdoor controller board LED. See electric wiring diagram of
the outdoor unit for details.)
(2) Make sure that there is no trouble with the indoor fan.
Emergency operation will be continuous operation mode due to power ON/OFF (ON/OFF with the remote controller is not possible).
[Emergency operation procedure]
(1) Set the dip switch (SW3<I. B>) on the indoor controller board to 1 on and 2 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. If vane is closed, open the vane by hands.
(4) Thermostat will not function.
(5) Emergency cooling should be limited to 10 hours maximum.
(6) After every operation, set all dip switches (SW3<I. B>) to OFF.
CND CNT
1 3 1 3
POWER TRANS
F2 F1
LED2 5V
POWER
ZNR
LED1 12V
SW7 SW3
POWER
ON
OFF
1234 12
J9 J1
SW6
1234
4 5 6 7 8 9
NAME
GRN/YLW
10VAC
115V
14.3VAC
T
6
CN4T
6 1
4 3 2 1
TRANS
CN6V
VANE
CN21
PIPE
CN20
INTAKE
SYMBOL
ROOM TEMP. THERMISTOR
RT1
(32˚F/15KΩ, 77˚F/5.4KΩ DETECT)
PIPE TEMP. THERMISTOR
RT2
(32˚F/15KΩ, 77˚F/5.4KΩ DETECT)
SW2<I. B> ADDRESS SELECTOR
SW3<I. B> EMERGENCY OPERATION
SW6<I. B> MODEL SELECTOR
SW7<I. B> MODEL SELECTOR
SW17<I. B> ADDRESS SELECTOR
T TRANSFORMER
TB2 POWER TERMINAL BLOCK
TB4 INDOOR / OUTDOOR CONNECTING LINE TERMINAL BLOCK
TB5, 6 REMOTE CONTROLLER TRANSMISSION LINE TERMINAL BLOCK
X4<I. B> FAN MOTOR RELAY
ZNR VARISTOR
L1
POWER SUPPLY
Å`(1 PHASE)
Çm
AC115V 60Hz
GR
GROUND
TB2
MODELS 18,24FK 30,36FK
MV
ON ON
SW7
OFF OFF
1234
TRANSMISSION WIRES
TB5
DC12V
2
BLU
1
BLU
TB4 TO OUTDOOR UNIT
2
ORN
CONNECTING WIRES
1
YLW
DC12V
R.B
RT2
1 2 3
CN2
RT1
LCD
CN1
1 2 3 4 5
0987654321
NAME
1234
TB6
1 2
6
SW17
OFF
ON
BG79N686H01
23