Mitsubishi Electric PUZ-M200YKA Service Manual page 58

Check method of DC fan motor (fan motor/outdoor controller circuit board)
Notes
1
· High voltage is applied to the connecter (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 causes trouble of the outdoor controller circuit
Self check
2
Symptom : The outdoor fan cannot rotate.
Fuse check
Check the fuse (F5) on outdoor
controller circuit board.
Did the fuse blow?
No
Wiring contact check
Contact of fan motor connector (CNF1, 2)
Is there contact failure?
No
Power supply check (Remove the connector (CNF1, 2))
Measure the voltage in the outdoor controller circuit
TEST POINT
1 : V (between 1 (+) and 4 (−) of the fan connector): V
DC
TEST POINT 2 : V (between 5 (+) and 4 (−) of the fan connector): V
CC
Is the voltage normal?
No
Replace the outdoor
controller circuit board.
Check the operation.
Fail
Replace the defective fan motor.
OCH737
board and fan motor.)
Replace the outdoor controller circuit board
Yes
(C.B) and the defective fan motor (MF1, 2).
Recover wiring.
Yes
board.
Replace the defective fan motor.
Yes
Check the operation of fan.
Replace the outdoor controller circuit board.
OK
END
250–330 V DC
DC
15 V DC
CC
.
Yes
Fail
58
OK
END