Wiring Diagram - Mitsubishi Electric PKH18FK Technical & Service Manual

5

WIRING DIAGRAM

MODELS PKH18/24/30/36FK WIRING DIAGRAM
I.B
FAN1
SW2
ON
OFF
123456
POWER SUPPLY
~(1 PHASE)
AC208/230V 60Hz
SYMBOL
C FAN MOTOR CAPACITOR
CN1<R.B> PROGRAM TIMER CONNECTOR
CN2<R.B> REMOTE SWITCH CONNECTOR
CN21<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)
FS1,2 THERMAL FUSE <243°F / 18, 24FK : 10A. 30.36FK : 16A>
H HEATER
I.B INDOOR CONTROLLER BOARD
J1 MODE SELECTOR JUMPER RESISTORS
J5 MODE SELECTOR JUMPER RESISTORS
J9 MODE 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 indoor fan motor (MF) is connected with 230V power, using 208V power will require a setting change of the dip switch (SW7<I.B>) on the indoor con-
troller board as shown in fig : w 1.
fig w 1 Indoor fan motor (MF) for 208V.
2. Since the indoor transformer (T) is connected with 230V power if 208V power is used. Change the wiring connection showing fig : w 2.
fig 2
w When power supply is
3. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
4. Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers.
5. Symbols used in wiring diagram above are, ¤¤ : Connector, / : Terminal block.
6. 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 "P8" will be displayed on the remote controller and the trouble position will be 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 and 1 - 2 on for heating.
(2)Turn on outdoor unit side circuit breaker, then indoor unit side circuit breaker.
(3)During emergency operation indoor fan runs at high speed but automatic vane remains stopped.
If the air outlet is blocked up with the vane, Open it with your hands.
(4)Thermostat will not function. Cold air blows out for defrosting during heating thus do not operate defrosting for along time.
(5)Emergency cooling should be limited to 10 hours maximum.
(The indoor unit heat exchanger may freeze).
(6)After every operation, switch the fan connector to FAN1, and set all dip switches (SW3<I.B>) to OFF.
22
MF
C
CND CNT
POWER TRANS
X4
F2 F1
LED2 5V
POWER
X4
ZNR
LED1 12V
POWER
SW7 SW3
ON
OFF
1234 1 2
J 5 J 9 SW6 J 1
2 4 1234 4 5 6 7 8 9
88H
RED RED
3 5 BLU
TB2
4 6
RED
L1
BLU
L2
GROUND GRN/YLW
GR
NAME
ON
SW7
OFF
1 2 3 4
YELLOW
230V
GRN/YLW
10VAC
230V
208V 14.3VAC
T
6
MV
CN4T
6 1
4 3 2 1
TRANS
CNGV
VANE
CN21
PIPE
CN20
INTAKE
H
FS1 FS2
I.B
8
88H
BWN
CN24
YLW
HEATER
SYMBOL
ROOM TEMP. THERMISTOR
RT1
(32°F / 15KΩ, 77°F / 5.4KΩ DETECT)
INDOOR COIL 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 REMOTE CONTROLLER TERMINAL BLOCK
TB6 TRANSMISSION LINE
X4<I.B> FAN MOTOR RELAY
ZNR VARISTOR
26H HEATER THERMAL SWITCH
88H HEATER CONTACTOR
ON
OFF
1 2 3 4
240V
YELLOW
208V
RED
L1
POWER SUPPLY
~(1 PHASE)
L2
AC208/230V 60Hz
GR
GROUND
TB2
MODELS 18.24FK 30.36FK
ON ON
SW7
OFF OFF
123 4 1234
TRANSMISSON WIRES
TB5 DC12V
B LU 2
B LU 1
TB4
B R N 3
TO OUTDOOR UNIT
OR N 2
CONNECTING WIRES-POLAR
DC12V
1
Y LW
R .B
RT2
TB6
1 2 3
1 2
CN2
RT1
LCD
CN1
1 2 3 4 5 6
SW17
OFF
ON
7 GRY
09876542321
26H
GRY
NAME
BG79N687H01