103
8
Fault Name
Operating
Panel Display Cause
Possible Solution
Input phase
loss
Input phase loss occurs.
Eliminate faults in external circuitry.
Drive board, lightning protection
board, control board, or rectifier
bridge is abnormal.
Contact the agent or Benshaw.
Output phase
loss
Motor winding is damaged.
Check resistance between motor wires.
The cable connecting the AC
drive and the motor is abnormal.
Check for wiring errors and ensure the output
cable is connected properly.
The AC drive’s three-phase
outputs are unbalanced when
the motor is running.
Check whether the motor three-phase winding
is normal.
The drive board or the IGBT
is abnormal.
Contact the agent or Benshaw.
IGBT overheat
The ambient temperature
is too high.
Lower the ambient temperature.
The ventilation is clogged.
Clean the ventilation.
The fan is damaged.
Replace the cooling fan.
Thermally sensitive resistor
of IGBT is damaged.
Replace the damaged thermally sensitive resistor.
External fault
The AC drive IGBT is damaged.
Replace the AC Drive IGBT.
External fault signal is input
via DI.
Confirm that the mechanical condition allows
restart (F8-18) and reset the operation.
External fault signal is input
via virtual I/O.
Confirm that the virtual I/O parameters in group
A1 are set correctly and reset the operation.
Communication
fault
Host computer is in abnormal
state.
Check the cable of host computer.
Communication cable
is abnormal.
Check the communication cables.
The serial port communication
protocol (F0-28) of extension
communication card is set
improperly.
Set F0-28 of extension communication
card correctly.
Communication parameters in
group Fd are set improperly.
Set communication parameters in group
Fd properly.
If, after checking all the preceding, the fault still exists, restore the default settings.
Contactor fault
Drive board and power supply
are abnormal.
Replace drive board or power supply board.
Contactor is abnormal.
Replace contactor.
The lightning protection board
is abnormal.
Replace the lightning protection board.
Current
detection fault
The hall element is abnormal.
Replace the hall element.
The drive board is abnormal.
Replace the drive board.
Motor auto-
tuning fault
Motor parameters are not set
according to nameplate.
Set motor parameters correctly according
to nameplate.
Motor auto-tuning times out.
Check the cable connecting AC drive and motor.
The encoder is abnormal.
Check whether F1-27 (encoder pulses per
revolution) is set correctly. Check whether
signal lines of encoder are connected correctly
and securely.
Encoder fault
Encoder is not matched.
Set the type of encoder correctly.
Encoder wiring is incorrect.
Check the PG card power supply
and phase sequence.
Encoder is damaged.
Replace encoder.
PG card is abnormal.
Replace PG card.
EEPROM read-
write fault
The EEPROM chip is damaged.
Replace the main control board.
Short circuit to
ground
Motor is short circuited
to the ground.
Replace cable or motor.
Accumulative
running time
reached
Accumulative running time
reaches the setting value.
Clear the record through parameter initialization.
