Mitsubishi Electric PUMY-P112VKM1, Руководство по обслуживанию

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Check code
Abnormal points and detection methods Causes and check points
Abnormal if no rotational frequency is detected, or detected a value
outside the specified range during fan motor operation.
Malfunction of fan motor
Disconnection of CNF connector
Defective outdoor multi controller circuit 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 melting?
Is there any abnormality such
as a disconnection, looseness or
breakage?
Is the voltage normal?
•
Replace the outdoor multi controller circuit board.
• Replace the fan motor.
Connect the wiring/connector properly.
Replace it in case of a breakage.
Replace the outdoor multi controller circuit
board.
Replace the fan motor.
Check the fuse on the outdoor multi
controller circuit board.
Check the fan motor connector (CNF1 and
CNF2) for a disconnection or looseness.
Remove the fan motor by disconnecting the fan motor
connector CNF1 and CNF2, then check the voltage of
outdoor multi controller circuit board
"Test points are;
V
DC
approx. 310 to 350 V DC (fan connector 1-4)
V
CC
approx. 15 V DC (fan connector 5-4)"
(melting)
(Not melting)
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OCH576