58
OCH737
Notes
· 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
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)
Fail
Fail
Wiring contact check
Contact of fan motor connector (CNF1, 2)
Fuse check
Check the fuse (F5) on outdoor
controller circuit board.
Power supply check (Remove the connector (CNF1, 2))
Measure the voltage in the outdoor controller circuit
board.
TEST POINT
1
: V
DC
(between 1 (+) and 4 (
−
) of the fan connector): V
DC
250–330 V DC
TEST POINT
2
: V
CC
(between 5 (+) and 4 (
−
) of the fan connector): V
CC
15 V DC
Recover wiring.
Replace the outdoor controller circuit board.
Replace the defective fan motor.
.
Replace the outdoor controller circuit board
(C.B) and the defective fan motor (MF1, 2).
Replace the outdoor
controller circuit board.
Replace the defective fan motor.
Is the voltage normal?
Is there contact failure?
Yes
No
Did the fuse blow?
No
Yes
Check the operation of fan.
END
Yes
OK
Check the operation.
END
OK
Yes
No
