Mitsubishi PU12EK Technical & Service Manual page 14

MODELS : PU18EK
SYMBOL NAME
C COMPRESSOR CAPACITOR
C3 FAN CAPACITOR
CH CRANKCASE HEATER
CONNECTING WIRES INDOOR/OUTDOOR
CN3<O. B>
CONNECTOR
CN6T<O. B> TRANSFORMER CONNECTOR
1
FROM INDOOR UNIT
CONNECTING WIRES 2
12V DC (polar)
TB3
TB1
L1
POWER SUPPLY
L2
208/230V
1phase 60Hz
GR
Main functions of LED (when both No. 1 and 2 of €
LED NO. Output display (light)
LD1 Compressor indoor command
LD2 —
LD3 —
LD4 Compressor ON
LD5 Outdoor fan ON
LD6 —
LD7 —
LD8 Crankcase heater ON
NOTES :If the operation stops to function of the protection device, the check display flashes.
How to use SW1 and 2
€
Pressing erases the past check contents loaded on the micro-
SW1
computer.
The output display (light) remains during operation but pressing
displays the past check contents in flashing mode.
switch again returns to output display (light).
CAUTION FOR SERVICING
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.
CAUTION 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 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) for indoor and outdoor units.
SYMBOL
LD1 ~ LD8 LED <CHECK, SERVICE>
MC COMPRESSOR
MF3 OUTDOOR FAN MOTOR (INNER THERMOSTAT)
O. B OUTDOOR CONTROLLER BOARD
SW1, 2, 3<O. B> SELECT SWITCH <CHECK, SERVICE>
T TRANSFORMER
FC <O. B> FAN CONTROLLER
F3 <O. B> FUSE <6A>
LED
YLW
ORN
O.B
LD8
SW1
LD7
LD6
SW2
LD5
LD4
SW3
LD3
OFF
LD2
ON
LD1
2 1
2
CN3
1
CN6T
6 5 4 3 2 1
4
RED
BRN 11.5V AC
208V
RED 15.5V AC
WHT
ORN
ORN 36.0V AC
WHT
230V
T
RED
WHT
RED
WHT
GRN
are ¨OFF¨)
SW3
Check display (flush)
Pipe temperature sensor short / open
63H2 functions
TH3 overheat protection
Defective input
Pressing the
NAME
TH3
CN2
X12 X11
X12 X11
F3
ZNR
TRF 52C CH R/1 S/2
BLU
S
A
CH
52C
B
52C
R U
BLU
2
WHT
T W
BLU
—
—
—
—
€
SW2
White connector
14
SYMBOL
TH3 OUTDOOR COIL THERMISTOR
X11 <O. B> CRANKCASE HEATER RELAY
X12 <O. B> COMPRESSOR RELAY
ZNR <O. B> VARISTOR
52C CONTACTOR
63H2 HIGH PRESSURE SWITCH <PROTECT>
TB1 POWER SUPPLY TERMINAL BLOCK
CONNECTING WIRES INDOOR/OUTDOOR
TB3
TERMINAL BLOCK
51C OVERCURRENT RELAY
FC
5
26C
63H2
51CM
T/3
MF3
BLU
63H2
MF3
R
51C
1 C
WHT
MC
RED
S
C
When power Supply is 208V
208V
RED
230V
ORANGE
NAME
RED
C3
ORN
WHITE