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Notes
· High voltage is applied to the connecter (CNF1, 2) for the fan motor. Give 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 turn around.
1
2
Check method of DC fan motor (fan motor / outdoor controller circuit board)
No
NG
NG
Wiring contact check
Contact of fan motor connector (CNF1, 2)
Fuse check
Check the fuse (F5) on outdoor
controller board.
Power supply check (Remove the connector (CNF1, 2))
Measure the voltage in the outdoor controller circuit
board.
TEST POINT
1 :VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC250~330V
TEST POINT 2 :VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC15V
Wiring recovery
Replace outdoor controller board.
Replace the fan motor.
Replace outdoor controller board (C.B)
and fan motor (MF1, 2).
Replace outdoor
controller board.
Replace the fan motor.
Is the voltage normal?
Is there no contact failure?
Yes
Yes
No
Did the fuse blow?
No
Yes
Check the operation of fan. END
Yes
OK
Check the operation. END
OK
OCH429--2.qxp 07.11.20 9:18 AM Page 56