Midea M2OC-14HRDN1 Technical & Service Manual page 32

8.3.1.3 Zero-crossing signal error
8.3.1.4 Indoor fan speed has been out of control
Shut off the power supply
and turn it on 1 minute
later. Is it still displaying
the error code?
Yes
S h u t o f f t h e p o w e r
supply, rotate the cross
fan by hand. Does it
rotate properly?
Yes
Check the wires of
fan motor. Are all the
connections good?
Yes
Check the resistance value of
indoor fan motor, is it normal?
Yes
Replace indoor PCB.
No The unit operates normally.
Disassembly the
connection between
No
fan and motor, check if
the bearing is normal?
No Correct the connections.
No Replace the bearing.
Yes
Replace indoor fan motor.
No