Mitsubishi Mr.SLIM PUH18EK Technical & Service Manual page 12

MODELS : PUH24EK PUH24EK
PUH30EK PUH30EK
HC
CRANKCASE HEATER
C1,2
FAN MOTOR CAPACITOR
C
COMPRESSOR CAPACITOR
FC(O.B)
FAN CONTROLLER
F(O.B) FUSE(6A)
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)
TB3
BRN AC12.3V
RED AC12.3V
TB1
L1
POWER SUPPLY
L2
1[ 208/230V
GR
60Hz
(when both No.1 and 2 of
Main functions of LED
Output display(light)
LED NO.
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
1. If the operation stops to function of the protection device,the check display flushes.
NOTES:
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.
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Since the indoor transformer(T) is connected with 230V power,if 208V power is used,change the
wiring connection in the following Procedure.
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
PUH30EK
1
MC
MF1,2
O.B
SW1•2•3(O.B)
T
TB1,3
RT
X11(O.B)
LED
RT
O.B
SW1
X14
CN2
SW2
SW3
OFF
ON
X14
2 1
3
2
CN3
1
CN4T
4
4 3 2 1
SV TRF
21R
RED
208V
WHT
ORN
WHT
230V
T
RED
BLK
52C
RED
1/L1
BLK
5/L3
6/T3
GRN
SW3 are"OFF")
Pipe temp.sensor short/open
ON 63H2 functions
RT overheat protection
Defective input
:Terminal block
is to turn the compressor ON-OFF during servicing.
2
COMPRESSOR MOTOR(INNER THERMOSTAT)
FAN MOTOR(INNER THERMOSTAT)
OUTDOOR CONTROLLER BOARD
SELECT SWITCH(CHECK,SERVICE)
TRANSFORMER
TERMINAL BLOCK
OUTDOOR COIL THERMISTOR
(32°F/15K',77°F/5.4K')
HC RELAY
4 3 2 1
X13 X12 X11
CN4
X13 X12 X11
F
ZNR R/1 S/2
21S4 52C CH
S
A1
21
HC
52C
S4
A2
2/T1 BLU
R
WHT C
MC
BLU RED
S
C
Check display(flush)
:Connector :PC board insertion tab.
12
COMPRESSOR RELAY
X12(O.B)
21S4 RELAY
X13(O.B)
21R RELAY
X14(O.B)
VARISTOR
ZNR(O.B)
52C COMPRESSOR CONTACTOR
63H1 CONTROL HIGH PRESSURE SWITCH
63H2 PROTECT HIGH PRESSURE SWITCH
5
63H1
T/3
BLU BLU
63H1 63H2
How to use SW1 and 2
Pressing erases the past check contents
SW1
loaded on the microcomputer.
The output display (light) remains during operation
but pressing displays the past check contents
SW2
in flushing mode. Pressing the switch again returns
to output display(light).
Æ Æ
White connector
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When Power Supply is 208V
RED 208V
ORANGE 230V
FC
26C
MF2
63H2
MF1
51CM
WHT
BLU
BLU
BLU
4
WHT WHT
3
RED RED
MF1
2
C1
1
ORN ORN
YLW
YLW
1
C2
2
BRN BRN
MF2
3
WHT WHT
4
BLU BLU
WHITE