Haier HU062WAMNA Service Manual page 146

[120] Module power supply abnormal
Check if voltage of power
supply is normal
Check if wire of electric box is
correct
If relay or AC contactor acts well
Measure if DC bus line
voltage between P and N on
module is less than 140V
Check rectifier, reactor,
electrolytic capacitor in
inverter main circuit
Y
Y
Y
Y
146
N
Improve power supply circuit
N
Correct the wiring due to
diagram
N
Adjust or replace relay or AC
contactor
N
DC bus line voltage circuit on
inverter board broken down,
replace inverter module board