Service manual
15
FROM INDOOR UNIT
CONNECTING WIRES
12V DC (polar)
POWER SUPPLY
208/230V
1phase 60Hz
1
2
TB3
L1
L2
GR
TB1
O.B
LED
TH3
YLW
BRN 11.5V AC
RED
RED
WHT
WHT
WHT
RED
R
R
S
C
T
C
U
52C
MC
W
GRN
WHT
BLU
BLU
WHT
RED
RED
ORN
GRY
GRY
WHT
WHT
BLU
YLM
YLM
YLM
YLM
RED
RED
BLU
BLU
15.5V AC
208V
230V
T
ORN
SW1
SW2
SW3
CN3
CN2
TRF 52C
52C
CH
ZNR
FC
26C
51CM
63H2
63H2
BLU
WHT
RED
ORN
C3
MF3
MF3
R/1
F3
S/2 T/3
CH
X12
X12 X11
X11
CN6T
OFF
ON
2
2
1
1
1
S
A
B
5
234
4
LD8
LD7
LD6
LD5
LD4
LD3
LD2
LD1
56
ORN 36.0V AC
BLU
WHT
BRN
YLW
C4
MF4
MF4
SYMBOL
C
NAME
COMPRESSOR CAPACITOR
C3, 4 FAN CAPACITOR
CH CRANKCASE HEATER
CN3<O. B>
CONNECTING WIRES INDOOR/OUTDOOR
CONNECTOR
CN6T<O. B> TRANSFORMER CONNECTOR
FC <O. B> FAN CONTROLLER
F3<O. B> FUSE <6A>
SYMBOL
LD1~LD8
NAME
LED <CHECK, SERVICE>
MC COMPRESSOR (INNER THERMOSTAT)
MF3, 4
OUTDOOR FAN MOTOR (INNER THERMOSTAT)
O. B OUTDOOR CONTROLLER BOARD
SW1, 2, 3<O. B>
T
SELECT SWITCH <CHECK, SERVICE>
TRANSFORMER
TB1 POWER SUPPLY TERMINAL BLOCK
TB3
CONNECTING WIRES INDOOR/OUTDOOR
TERMINAL BLOCK
SYMBOL
TH3
NAME
OUTDOOR COIL THERMISTOR
X11 <O. B> CRANKCASE HEATER RELAY
X12 <O. B> COMPRESSOR RELAY
ZNR <O. B> VARISTOR
52C
63H2
CONTACTOR
HIGH PRESSURE SWITCH <PROTECT>
R RESISTOR
C5 COMPRESSOR START CAPACITOR
19 COMPRESSOR START RELAY
Main functions of LED (when both No. 1 and 2 of
€
SW3
are ¨OFF¨)
NOTES :If the operation stops to function of the protection device, the check display flashes.
How to use SW1 and 2
● Pressing
€
SW1
erases the past check contents loaded on the micro-
computer.
● The output display (light) remains during operation but pressing
€
SW2
displays the past check contents in flashing mode. Pressing the
switch again returns to output display (light).
● The connector marked
s
— ⁄
ı
— is to turn the compressor ON-OFF during servicing.
The compressor stops by disconnecting the white connector as shown at the right.
● Since LD8 lights when normal power is turned "ON", check the power supply with
the "ON" or "OFF" LD8.
❈ Since the indoor transformer (T) is connected with 230V power, if 208V power is
used, change the wiring connection in the following Procedure.
● Since the indoor and outdoor connecting wires has polarity, make sure to connect the same terminal numbers (1, 2) for indoor and outdoor units.
CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES
CAUTIONS FOR POWER SUPPLY WIRING
CAUTION FOR SERVICING
MODELS : PU24EK PU30EK PU36EK PU42EK2
LED NO. Output display (light) Check display (flush)
LD1 Compressor indoor command —
LD2 — —
LD3 — TH3 short / open
LD4 Compressor ON 63H2 functions
LD5 Outdoor fan ON —
LD6 — —
LD7 — TH3 overheat protection
LD8 Crankcase heater ON Defective input
White connector
When power Supply is 208V
RED WHITE208V
ORANGE 230V
3
BLU
PU42EK2
only
T
R
52C
U
W
BLU
MC
R
C
S
C
RED
BLU
WHT
WHT
R
BLU
C5
RED
19
1
19
2
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