Airwell YEVFD Series, Service Manual

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Check if voltage of power supply is normal
Check if wire of electric box is correct
Improve power supply circuit
Correct the wiring due to diagaram
Replace compressor
Replace power module
If compressor is normal (compressor
coil resistor, insulation)
Compress load too much, check
the reason
If power module is normal
[113] Protection of overload
[114] Voltage too low of DC bus line of transducer
Check if voltage of power
supply is normal
Measure if DC bus line voltage
between P and N of module is
less than 375V
Circuit of DC bus line voltage on
inverter control board abnormal,
replace inverter control board
If AC contactor or relay acts well
Improve power supply circuit
Adjust or replace relay
Correct the wiring due to diagram
Check if wire of electric box is
correct
Check rectifier, reactor, electrolytic
capacitor in inverter main circuit
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