Mitsubishi PUMY-P60NKMU - Rotational Frequency of Outdoor Fan Motor Trouble

Check code
Abnormal points and detection methods Causes and check points
Abnormal if no rotational frequency is detected, or detected a value
outside the specifi ed range during fan motor operation.
Malfunction of fan motor
Disconnection of CNF connector
Defective outdoor controller board
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis Remedy
4400
Rotational frequency of outdoor fan motor trouble
No
No
Yes
Yes
Yes
No
Is the fuse blown?
Is there any abnormality such
as a disconnection, looseness or
breakage?
Is the voltage normal ?
Replace the outdoor controller board.
Replace the fan motor.
Connect the wiring/connector properly.
Replace it in case of a breakage.
Replace the outdoor controller board.
Replace the fan motor.
Check the fuse on the outdoor controller
board.
Check the fan motor connector (CN1 and 2)
for a disconnection or looseness.
Remove the fan motor by disconnecting the fan motor
connector CNF1 and CNF2, then check the voltage of
outdoor controller board
"Test points are;
V
DC
DC approx. 280 to 380V (fan connector 1-4)
V
CC
DC approx. 15V (fan connector 5-4)"
(blown)
(Not blown)
57
OCH502C