Wiring Diagram - Mitsubishi PLH-3AK.UK Technical & Service Manual

6

WIRING DIAGRAM

PLH-3AK.UK PLH-4AKS.UK
PLH-3AK .UK PLH-4AKS
1
PLH-3AKH.UK PLH-4AKHS.UK PLH-5AKHS.UK PLH-6AKHS.UK
PLH-3AKH .UK PLH-4AKHS
1
NAME
SYMBOL
P.B INDOOR POWER BOARD
w
I.B INDOOR CONTROLLER BOARD
CN2L
CONNECTOR (LOSSNAY)
CN51 CONNECTOR (CENTRALLY CONTROL)
FC FAN PHASE CONTROL
SW1 SWITCH (FUNCTION SELECTOR)
SW2 SWITCH (ADDRESS SELECTOR)
SW3
SWITCH (EMERGENCY OPERATION)
SW5
SWITCH (MODEL SELECTOR)
SW6 SWITCH (TWIN / TRIPLE SELECTOR)
SW7 SWITCH (MODEL SELECTOR)
SW8 SWITCH (OPTION)
SW9 SWITCH (MODEL SELECTOR)
X1
RELAY (DRAIN PUMP)
X4 RELAY (FAN MOTOR)
F1, F2 FUSE (6.3V / 250V)
ZNR VARISTOR
LED1 LED (DC 12V POWER)
LED2
LED (DC 5V POWER)
NOTES :
1. Since the indoor fan motor (MF) is connected with 230, 240V power. If 220V
power is used, change the dip switch (SW8) on the indoor controller board
as shown in fig : w2.
fig w2
Indoor fan motor (MF)for 220V.
2. Since the outdoor side electric wiring may change be sure to check the out-
door unit electric wiring for servicing.
3. Indoor and outdoor connecting wires are mode with polarities, make wiring
matching terminal numbers.
4. Symbols used in wiring diagram above are,
: Connector, : Terminal block.
5. 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 controller board.
PLH-5AKS.UK
.UK PLH-5AKS
1
.UK PLH-5AKHS
1
SYMBOL
C CAPACITOR (FAN MOTOR)
MF FAN MOTOR
MV
VANE MOTOR
DP DRAIN-UP MACHINE
DS DRAIN SENSOR
H2 DEW PREVENTION HEATER
TB2~TB6 TERMINAL BLOCK
RT1 ROOM TEMPERATURE THERMISTOR
(0: / 15k" , 25: / 5.4k" / DETECT)
RT2 PIPE TEMPERATURE THERMISTOR / LIQUID
(0: / 15k" , 25: / 5.4k" / DETECT)
R.B REMOTE CONTROLLER BOARD
CONNECTOR (PROGRAM TIMER)
CN1
CN2 CONNECTOR (REMOTE SWITCH)
SW17 SWITCH (ADDRESS SELECTOR)
SW18 SWITCH (FUNCTION SELECTOR)
SW8 SW8
ON ON
OFF OFF
1 2 3 4 5 6 1 2 3 4
PLH-6AKS.UK
.UK PLH-6AKS
1
.UK PLH-6AKHS
1
NAME
W.B
HEATER
[Check items]
(1)Make sure that no other trouble exist the outdoor unit. Trouble with the out-
door 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 con-
troller board LED. See electric wiring diagram of the outdoor unit for details.)
(2)Make sure that there is no trouble with the indoor fan.
5 6
Emergency operation will be continuous run with the 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
off for cooling and 1 - 2 on for heating.
(2)Turn on are outdoor unit side circuit breaker, then indoor unit side circuit
breaker.
(3)During emergency operation indoor fan runs at High speed but auto-vane
does not work.
(4)Thermostat will not function. Cold air blows out for defrosting during heating
thus do not operate defrosting for a long time.
(5)Emergency cooling should be limited to 10 hours maximum.
(The indoor unit heat exchanger may freeze).
(6)After every emergency operation, set all dip switches (SW3<I.B>) to OFF.
(7)Movement of the vanes does not work in emergency operation, therefore you
have to slowly set them manually to the appropriate position.
NOTE: If the drain water lift up mechanism is identified to be defective with the
microcomputer doctor during cooling, do not use emergency operation
(it causes drain overflow)
26
.UK
1
w The part name of
.UK
1
symbol "I.B" is "SPCB".
SYMBOL NAME
WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
RU
BZ BUZZER
LED1 LED (RUN INDICATOR)
LED2 LED (HOT ADJUST)
SW1 SWITCH (HEATING ON / OFF)
SWITCH (COOLING ON / OFF)
SW2
FS1 THERMAL FUSE (72°C 16A)
FS2 THERMAL FUSE (104°C 16A)
H1 HEATER
26H HEATER THERMAL SWITCH
HEATER CONTACTOR
88H
1 on and 2