Advertisement
Check method of DC fan motor (fan motor/outdoor 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 causes trouble of the outdoor controller circuit board and fan motor.)
2 Self check
Symptom: The outdoor fan cannot rotate.
Fuse check
Check the fuse (F5) on outdoor
multi 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 board.
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 multi
controller circuit board.
Check the operation.
Fail
Replace the defective fan motor.
OCH653C
Disconnect the FAN motor
Yes
connector and measure the
resistance of connector pins.
Refer to "10-6. HOW TO
CHECK THE PARTS".
Yes
Correct the wiring.
Yes
Replace the defective fan motor.
Check the operation of fan.
Replace the outdoor multi
controller circuit board.
OK
Complete.
Is the fan motor normal?
No
Replace outdoor controller board (C.B)
and the defective fan motor (MF1, 2).
250–330 VDC
DC
15 VDC
CC
Yes
OK
Fail
60
Yes
Replace outdoor controller
board (C.B).
Complete.
Advertisement
