Mitsubishi Mr.SLIM PUH18EK Technical & Service Manual page 14

MODEL : PUH42EK7
SYMBOL NAME
HC CRANKCASE HEATER
C1, 2 FAN MOTOR CAPACITOR
C COMPRESSOR CAPACITOR
FC(O.B) FAN CONTROLLER
F(O.B) FUSE(6A/250V)
21S4 4-WAY VALVE SOLENOID COIL
21R BYPASS VALVE SOLENOID COIL
LD1~LD8 LED(CHECK, SERVICE)
1
YLW
TO INDOOR UNIT
2
ORN
CONNECTING WIRES
3
BRN
DC 12V (polar)
O.B
TB3
BRN AC12.3V
RED
RED AC12.3V
ORN
T
TB1
L1
POWER SUPPLY
L2
1[ 208/230V
GR
60Hz
Main functions of LED
LED NO. Output display(light)
LD1 Compressor indoor command
LD2 Heating indoor command
LD3 63H1 ON
LD4 Compressor
LD5 Outdoor fan ON
LD6 4-Way valve ON
LD7 Bypass valve ON
LD8 Crankcase heater ON
NOTES: 1. If the operation stops to function of the protection device,the check display flushes.
2. Symbols used in wiring diagram above are.
CAUTION FOR SERVICING
S
The connector marked
The compressor stops by disconnecting the white connector as shown at the right.
CAUTIONS FOR POWER SUPPLY WIRING
Since LD8 lights when normal power is turned"ON", check the power supply with the"ON"or"OFF"LD8.
w Since the indoor transformer(T) is connected with 230V power, if 208V power is used, change the
wiring connection as shown at the right.
CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES
Since the indoor and outdoor connecting wires has polarity, make sure to connect the same terminal numbers(1,2,3)for indoor and outdoor units.
1
SYMBOL
MC COMPRESSOR MOTOR(INNER THERMOSTAT)
MF1,2 FAN MOTOR(INNER THERMOSTAT)
O.B OUTDOOR CONTROLLER BOARD
SW1·2·3(O.B) SELECT SWITCH(CHECK,SERVICE)
T TRANSFORMER
TB1, 3 TERMINAL BLOCK
PIPE TEMPERATURE THERMISTOR
RT
(32°F/15kΩ,77°F/5.4kΩ)
X11(O.B) HC RELAY
LED
RT
SW1
X14 X13
CN2
SW2
SW3
OFF
ON
X14
2 1
3
2 CN3
1
CN4T
4
4 3 2 1
SV TRF 21S4
21
21R
S4
208V
WHT
WHT
230V
RED
BLK
51C
52C
RED
2/T1
1/L1
BLK
4/T2
3/L2
5/L3
6/T3
GRN
RED
(When both No.1 and 2 of SW3 are"OFF")
Check display(flush)
Pipe temperature sensor short/open
ON 63H2 functions
51C functions
26C functions
RT overheat protection
Defective input
for 52C is to turn the compressor ON-OFF during servicing.
NAME
4 3 2 1
X12 X11
CN4
X13 X12 X11
F
52C CH
ZNR
R/1 S/2
BLU
S
A1
HC
52C
A2
BLU
R
WHT C
MC
RED
S
BLU
C
How to use SW1 and 2
•
•
:Terminal block :Connector
14
SYMBOL NAME
X12(O.B) COMPRESSOR RELAY
X13(O.B) 21S4 RELAY
X14(O.B) 21R RELAY
ZNR(O.B) VARISTOR
51C
THERMAL RELAY
52C COMPRESSOR CONTACTOR
63H1 CONTROL HIGH PRESSURE SWITCH
63H2 PROTECT HIGH PRESSURE SWITCH
26C
DISCHARGE THERMAL SWITCH
FC
5
26C
63H1
63H2
51CM
T/3
BLU
95
63H1 51C
26C 63H2
96
Pressing SW1 erases the past check contents
loaded on the microcomputer.
The output display (light) remains during operation
but pressing SW2 displays the past check contents
in flushing mode. Pressing the switch again returns
to output display(light).
:PC board insertion tab.
White connector
w When Power Supply is 208V
RED
208V
ORANGE
230V
MF2
MF1
WHT
BLU
BLU BLU
4
WHT WHT
3
MF1
RED RED
2
C1
1
ORN ORN
YLW YLW
1
C2
2
MF2
BRN BRN
3
WHT WHT
4
BLU BLU
WHITE