PART7, 4
2.3 Fan speed has been out of control diagnosis
2.4 Open or short circuit of temperature sensor diagnosis and solution
Replace the outdoor unit PCB
Check the connections between
the sensors and the PCB. Are the
connections good?
Replace the sensor and check if
the errors happen again?
Is the fan motor connector and
connection good?
The unit does not work normally
Turn off the unit, rotate the cross
fan. Does it rotate freely?
Disassemble the connection
between fan and motor, check if
the bearing is normal. If not,
change the bearing. If yes, follow
the below step.
Is the voltage being applied to the fan motor?
Shut off the power supply and turn on it 5s later
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