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38MGRBQ: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
Indoor fan speed malfunction diagnosis and solution
ERROR CODE
MALFUNCTION DECISION
CONDITIONS
SUPPOSED CAUSES
Troubleshooting
Power off, then restart the
unit after 3 minutes. Does
Shut off the power supply,
Rotate the fan by hand.
Does it turn easily?
Check the fan motor wiring.
Measure the voltage for the
fan motor from the main
PCB. Is it within normal
Replace the fan motor
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
REFER TO INDOOR UNIT SERVICE MANUAL
When the indoor fan speed is too low (300RPM) for a certain period of time, the unit ceases operation and the
LED displays a failure code.
Wiring mistake
Faulty fan assembly
Faulty fan motor
Faulty PCB
the problem remain?
Yes
Yes
Is it wired correctly?
Yes
parameters?
Yes
No
The unit is operating normally
Find the cause of the
No
problem and resolve it
Correct the connections.
No
No
Replace the main PCB
No
38
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