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[120] power supply of transducer abnormal
check if voltage of power
supply is normal
yes
check if wire of electric
box is correct
yes
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
yes
yes
no
improve power supply circuit
no
correct the wiring due to diagram
no
adjust or replace relay or AC
contactor
DC bus line voltage circuit on
no
inverter board broken down,
replace inverter module board
282
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