30
OCH681
Notes
· High voltage is applied to the connector (CNF1) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNF1) for the motor with the power supply on.
(It causes trouble of the outdoor controller circuit
board and fan motor.)
Self check
Symptom: The outdoor fan cannot rotate.
1
2
Check method of DC fan motor (fan motor/outdoor controller circuit board)
No
Fail
Fail
Wiring contact check
Contact of fan motor connector (CNF1)
Fuse check
Check the fuse (F5) on outdoor
controller board.
Power supply check (Remove the connector (CNF1))
Measure the voltage in the outdoor controller circuit
board.
TEST POINT
1
: V
DC
(between 1 (+) and 4 (
−
) of the fan connector): V
DC
280–380 V DC
TEST POINT
2
: V
CC
(between 5 (+) and 4 (
−
) of the fan connector): V
CC
15 V DC
Replace the defective fan motor.
Replace the outdoor controller board.
Replace the defective fan motor.
Replace the outdoor controller board (C.B)
and the defective fan motor (MF1).
Replace outdoor
controller board.
Replace the defective fan motor.
Is the voltage normal?
Is the resistance abnormal?
Yes
Yes
No
No
Fan motor check (CNF1)
Is there contact failure?
Did the fuse blow?
No
Yes
Check the operation of fan.
END
Yes
OK
Check the operation.
END
OK
UNIT
W85
W112
FAN MOTOR
Measuring points
pin1–pin4
pin5–pin4
pin6–pin4
pin7–pin4
BH61J064
Resistance
1
.1MΩ
4
0kΩ
BH61J065
Resistance
1
.1MΩ
4
0kΩ
9-5. HOW TO CHECK THE COMPONENTS
0.5
2.5
5
2.5
4.5
Vout (V)
PRESSURE
(MPaG)
(PSI)
3
2
1
WT
BU
BK
SENSOR
5 V DC
GND
63HS
Vout
MICRO
PROCESSOR
MULTI
CONTROLLER BOARD
3
-
1
: 5 V (DC)
2
-
1
: Output Vout (DC)
<HIGH PRESSURE SENSOR>
Summary of Contents for PUHZ-W112VAA 11.2kW Mono
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