AC70 VC CONTROL FREQUENCY INVERTER MANUAL
FAULT DIAGNOSES AND PROCESSING
57
Supply voltage is too low
yes
yes
yes
yes
yes
yes
yes
no
no
no
no
no
no
no
no
Whether power off,including instant power off
Restart after reset
Change fault component
and correct bad contact
Is there any fault component or bad contact in power circuit
Whether power voltage is in fixed range as required
Is there any big load start or stop under the same power supply
votage between DC circuit P+ and N- in
main loop is over E-55 setting or not
Maybe inverter fault.please seek for technic support
Modify power supply
system as required
Adjust E-55 setting
Voltage is too low
while stop Lu1
Voltage is too low
while running Lu2
Inner inverter over heat
Whether cooling fan works normally
Whether temperature display(C-09)is
the same as the actual temperature
Whether load and carried frequency
E-20 setting are too high
Whether air cooling channels are air-logged
Whether the temperature is within the fixed range as required
Change fan
Maybe temperature ditection
circuit fault.please seek for
technic support
Reduce load and
carried frequency
Clear the air-logged channel
Adjust the temperature to
the fixed range as required
Maybe machine fault or misact.seek for technic support
no
no
no
no
no
yes
yes
yes
yes
yes
Inner inverter
overheat OH
