17
MODEL : PU42EK7
1
PU42EK7
2
51C functions
(32
°
F/15k
Ω
,77
°
F/5.4k
Ω
)
WHT
WHT
CN2
26C functions
26C
SYMBOL
CN3<O.B>
CN4T<O.B>
CH
C3, 4
C
FC<O.B>
F<O.B>
NAME
SYMBOL
NAME
SYMBOL
NAME
CONNECTOR
(CONNECTING WIRES INDOOR/OUTDOOR)
CONNECTOR(TRANSFORMER)
CRANKCASE HEATER
RUN CAPACITOR FOR MF1,2
RUN CAPACITOR FOR MC
FAN CONTROLLER
FUSE(6A/250V)
LD1~LD8
MC
MF1, 2
O.B
SW1·2·3<O.B>
T
TB1
TB3
LED(CHECK, SERVICE)
COMPRESSOR MOTOR (INNER THERMOSTAT)
FAN MOTOR (INNER THERMOSTAT)
OUTD00R CONTROLLER BOARD
SELECT SWITCH(CHECK,SERVICE)
TRANSFORMER
TERMINAL BLOCK(POWER SUPPLY)
TERMINAL BLOCK
(CONNECTING WIRES INDOOR/OUTDOOR)
TH3
X11<O.B>
X12<O.B>
ZNR<O.B>
51C
52C
63H2
26C
THERMISTOR FOR PIPE TEMPERATURE
AUXILIARY RELAY FOR CH
AUXILIARY RELAY FOR MC
VARISTOR
THERMAL RELAY
MAGNETIC CONTACTOR FOR MC
HIGH PRESSURE SWITCH(PROTECT)
DISCHARGE THERMAL SWITCH
LED NO.
LD1
LD2
LD3
LD4
LD5
LD6
LD7
LD8
Output display(light)
Compressor indoor command
Compressor ON
Outdoor fan ON
Crankcase heater ON
Check display(flush)
Pipe temperature sensor short/open
63H2 functions
TH3 overheat protection
Defective input
NOTE: If the operation stops to function of the protection device, the check display flushes.
CAUTION FOR SERVICING
The connector marked for 52C is to turn the compressor ON-OFF during servicing.
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.
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)for indoor and outdoor units.
How to use SW1 and 2
Main functions of LED
(When both No.1 and 2 of SW3 are"OFF")
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).
S
White connector
w
When Power Supply is 208V
208V
RED
WHITE
230V
ORANGE
TO INDOOR UNIT
CONNECTING WIRES
DC 12V (polar)
POWER SUPPLY
208/230V
1 phase 60Hz
TB1
L1
L2
GR
GRN
RED
WHT
RED
WHT
WHT
WHT
MC
MF1
MF2
RED
ORN
BRN
YLW
C3
C4
1
2
3
4
CN4T
4
TRF
52C
CH ZNR
S/2
R/1
T/3
2
1
CN3
TB3
1
2
ORN
YLW
O.B
X12
X11
X12
X11
SW2
SW1
SW3
OFF
ON
2 1
F
FC
5
51CM
63H2
26C
52C
CH
A1
A2
S
63H2
GRY
GRY
WHT
WHT
BLU BLU
RED
BLU
BLU
WHT
BLU
WHT
RED
LED
CN4
63H1
63H1
63H1
63H1
T
RED AC12.3V
BRN AC12.3V
RED
ORN
230V
208V
MF2
4 3 2 1
LD7
LD1
LD2
LD3
LD4
LD5
LD8
LD6
MF1
TH3
96
95
51C
YLW
YLW
51C
C
BLU
WHT
BLU
2/T1
4/T2
6/T3
RED
5/L3
3/L2
1/L1
52C
RED
S
R
C
w
OC247-E--1.qxp 04.8.11 4:25 PM Page 17
