Midea MOB2-12HN1-QC2 - Diagnosis and Solutions

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9.2 Diagnosis and Solution
9.2.1 Indoor fan speed out of control diagnosis and solution
Shut off the power supply
and turn it on 5 seconds
later.Is it still displaying
the error code?
Shut off the power
supply, rotate the cross
fan by hand. Does it
rotate properly?
The unit operates normally.
Disassembly the
connection between
fan and motor, check if
the bearing is normal?
Replace the bearing.
Check the wires of
fan motor. Are all the
connections good?
No
Yes
No No
Replace indoor fan motor.
Yes
Correct the connections.
No
No
Yes
Yes
Check the resistance value of
indoor fan motor, is it normal?
Replace indoor PCB.
Yes