[114]
voltage too low of DC bus line of transducer
yes
no
no
no
yes
yes
no
correct the wiring due to diagram
circuit of DC bus line voltage on
inverter control board
abnormal, replace inverter
control board
yes
measure if DC bus
line voltage between P
and N of module is less
than 375V
check if voltage of power
supply is normal
check rectifier, reactor, eletrolytic
capacitor in inverter main circuit
if AC contactor
or relay acts well
improve power supply circuit
check if wire of electric
box is correct
adjust or replace relay
[115]
voltage too high of DC bus line of transducer
yes
no
no
yes
no
correct the wiring due to diagram
circuit of DC bus line voltage on
inverter control board
abnormal, replace inverter
control board
yes
measure if DC bus
line voltage between P
and N of module is over
644V
check if voltage of power
supply is normal
check rectifier, reactor, eletrolytic
capacitor in inverter main circuit
improve power supply circuit
check if wire of electric
box is correct
92