AC70 VC CONTROL FREQUENCY INVERTER MANUAL
FAULT DIAGNOSES AND PROCESSING
58
Over load
yes
yes
yes
yes
no
no
no
no
no
no
no
yes
yes
yes
no
no
Change torque improving
or V/F curve setting
Prolong ACC/DCC time
Restart after motor stop or
change start mode E-30
to 1/2
Reduce load or
improve capacity
Correct setting value
Change externa
lthermal relay
Maybe inverter fault or misact.Please seek for technic support
Whether torque improving or V/F curve setting is suitable
Whether ACC/DCC time is too short
Whether the motor stops while restart
Whether load too high
Whether electric thermal relay overload
relay setting E-50 is suiable
Whether electric thermal relay overload
characteristic matches the motor overload
characteristic
Motor overload OL1
Inverter overload OL2
No display
Inverter keyboard
LED no display
Whether keyboard
connect line is reliable
Whether power indicater
linght on power board is
on or not
Whether circuit breaker
at power side is connect to
contacter
connect
connect
Whether power input
terminals R/S/T is normal
Whether there is short connect
or DC reactor between terminals
P1 and P+l
Maybe
inverter
fault or motor heat
caused by noise.Please find technic support
Short connect or
connect DC reactor
yes
yes
yes
yes
yes
no
no
no
no
no
Find our the fault cause
and clear the fault
