Protection Of Overload; Voltage Too Low Of Dc Bus Line Of Transducer - Haier AV08NMSETA Service Manual

[113] Protection of overload

Check if voltage of power supply is normal
Check if wire of electric box is correct
If compressor is normal (compressor
coil resistor, insulation)
If power module is normal
Compress load too much, check

[114] Voltage too low of DC bus line of transducer

Check if voltage of power
Check if wire of electric box is
If AC contactor or relay acts well
Measure if DC bus line voltage
between P and N of module is
Check rectifier, reactor, electrolytic
capacitor in inverter main circuit
Yes
Yes
Yes
Yes
the reason
supply is normal
Yes
correct
Yes
Yes
less than 375V
Yes
No
Improve power supply circuit
No
Correct the wiring due to diagaram
No
Replace compressor
No
Replace power module
No
Improve power supply circuit
No
Correct the wiring due to diagram
No
Adjust or replace relay
No
Circuit of DC bus line voltage on
inverter control board abnormal,
replace inverter control board
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