AC70 VC CONTROL FREQUENCY INVERTER MANUAL
FAULT DIAGNOSES AND PROCESSING
59
Motor heat
motor heat
Adjust torque imporoving
value and V/F characteristic
Whether torque improving and V/
F characteristic are suitable or not
Whether motor continuously
run at low speed
Reduce load or
improve capacity
Whether load is too large
Use special motor for inverter
Whether output terminals U/V/W output
voltage /current three phase balance well
no
no
no
no
yes
yes
yes
yes
Maybe motor fault
Maybe inverter fault or motor heat caused by
noise.Please find technic support
Motor does not rotate
no
no
no
no
no
no
yes
no
yes
yes
yes
yes
yes
yes
yes
yes
should be reduced.If there is braking or brake uni,
please check whether it is loose
Maybe motor is locked because of too large load.Load
value is suitable
Whether torque improving
Improve torque
improving value
Motor fault
Whether
wiring is
correct or not
Whether
load
is too large
Is there voltage output on output terminal U/V/W
and three phase balance ok or not?
Correct connect
Maybe inverter fault .Please
find technic support
It works after correct the
upper frequency or given
frequency
It works after checking the
cause and slving the problem
Have input frequency
signal or not
It works after checking
the cause and solving
the problem
Have input command
signal or not
Whether keyboard
displays fault information
Work after solving
fault and reset
Motor does
not work
Whether
upper frequency limit E-10 or given frequency
is lower than the start frequency E-28 setting
