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[114] Voltage too low of DC bus line
Improve power supply circuit
Check if voltage of power
supply is normal
Check if wire of electric box is
correct
If AC contactor or relay acts well
Measure if DC bus line voltage
between P and N of module is
less than 375V
Check rectifier, reactor,
electrolytic capacitor in
inverter main circuit
Correct the wiring due to
diagram
Adjust or replace relay
Circuit of DC bus line voltage
on inverter control board
abnormal, replace inverter
control board
N
Y
Y
Y
N
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N
Y
