35
OCH748
Check method of DC fan motor (fan motor/outdoor multi controller circuit board)
1
Notes
· High voltage is applied to the connector (CNF1, 2) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNF1, 2) for the motor with the power supply on.
(It may damage the outdoor controller circuit board and fan motor.)
2
Self check
Symptom: The outdoor fan cannot rotate.
Replace the outdoor controller
circuit board (C.B).
Disconnect the FAN motor connector
and measure the resistance of
connector pins. Refer to “8-4. HOW
TO CHECK THE PARTS”.
Correct the wiring.
Yes
Yes
Yes
Yes
No
Fail
Fail
OK
OK
No
No
Fuse check
Check the fuse (F5) on outdoor
controller circuit board.
Wiring contact check
Contact of fan motor connector
(CNF1,2)
Power supply check
Measure the voltage on the outdoor controller circuit board.
(Remove the connectors CNF1 and CNF2)
TEST POINT
1
: V
DC
280–380 VDC (between 1 (+) and 4 (−) of CNF1)
TEST POINT
2
: V
CC
15 VDC
(between 5 (+) and 4 (−) of CNF1)
Is the fuse normal?
Is the fan motor normal?
Is there contact failure?
Is the voltage normal?
Replace the defective fan motor.
Replace the outdoor
controller circuit board.
Check fan motor rotation.
Complete.
Complete.
Replace the defective fan motor.
Replace the outdoor
controller circuit board.
Check fan motor rotation.
No
Replace the outdoor controller
circuit board (C.B) and the
defective fan motor.
Yes
<How to check the resistance>
To measure the resistance, connect the negative
(−) end of the tester to pin 4.
UNIT
PUZ-HWM140VHA PUZ-HWM140YHA
FAN MOTOR
BH61J064
Measuring points
Resistance
Pin 1–pin 4
∞
Pin 5–pin 4
1.1 MΩ
Pin 6–pin 4
40 k
Ω
Pin 7–pin 4
∞
