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?
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?
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
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