105
8
SN Fault Description
Cause
Possible Solution
1
There is no display
at power-on.
The mains voltage is not connected
or too low.
Check the power supply.
The switching power supply on drive
board of the AC drive is faulty.
Check bus voltage.
Wires between control board and drive
board and between control board and
operating panel are not connected.
Re-connect the 8-pin wire
and 40-pin wire.
Precharge resistor of the AC drive
is damaged.
Contact the agent
or Benshaw.
Control board or operating panel is faulty.
Rectifier bridge is damaged.
2
“HC” is displayed
at power-on.
Wires between drive board and control
board have poor contact.
Re-connect the 8-pin wire
and 28-pin wire.
Related components on control board
are damaged
Contact the agent
or Benshaw.
The motor or motor cable is short
circuited to ground.
The hall element is damaged.
The mains voltage is too low.
3
“Err23” is displayed
at power-on.
Motor or motor output cable is short
circuited to ground.
Use a megger to measure insulation
resistance of motor and motor cable.
Contact the agent or Benshaw.
The AC drive is damaged.
4
The display is normal at
power-on. But after running,
“HC”is displayed and the
drive stops immediately.
The cooling fan is damaged or locked-
rotor occurs.
Replace the cooling fan.
Short circuit exists in wiring of control
terminals.
Eliminate short circuit fault
in control circuit wiring.
5
Err14 (IGBT overheat)
is detected frequently.
The setting of carrier frequency
is too high.
Reduce carrier frequency (F0-15).
The cooling fan is damaged,
or ventilation is clogged.
Replace the fan or clean the ventilation.
Components inside the AC drive are
damaged (thermistor or others).
Contact the agent or Benshaw.
6
The motor does not rotate
after the AC drive runs.
There is a motor or motor
cable problem.
Check that wiring between AC drive
and motor is normal.
Related AC drive and motor parameters
are set improperly.
Restore the factory parameters and
re-set the following parameters
properly:
Encoder parameters, Motor ratings,
such as rate motor frequency and
rated motor speed
Motor 1 control mode (F0-01) and
Running command selection (F0-02)
F3-01 (torque boost) in V/F control
under heavy-load start.
Cable connection between drive board
and control board has poor contact.
Re-connect wiring and ensure
secure connection.
The drive board is faulty.
Contact the agent or Benshaw.
7
DI terminals are disabled.
Related parameters are set incorrectly.
Check and set parameters in group
F4 again.
External signals are incorrect.
Re-connect external signal cables.
Jumper across OP and +24 V
becomes loose.
Re-confirm the jumper bar across
OP and +24 V.
The control board is faulty.
Contact the agent or Benshaw.
8.6 SYMPTOMS AND DIAGNOSTICS
