4 Troubleshooting
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4�2 Common Symptoms And Diagnostics
Fault Name Possible Causes Solutions
There is no display at power-
on�
1� There is no power supply or the power supply is
too low�
2� The switching power supply on the drive board is
faulty�
3. The rectier bridge is damaged.
4� The buffer resistor of the drive is damaged�
5� The control board or the keypad is faulty�
6� The cable between the control board and the
drive board or keypad breaks�
1: Check the power supply�
2 to 5: Seek for maintenance�
6: Re-connect the 4-core and 28-core at cables,
or seek for maintenance�
"HC" is displayed at power-
on�
1� The cable between the drive board and the
control board is in poor contact�
2� The control board is damaged�
3� The motor winding or the motor cable is short-
circuited to the ground�
4� The power supply is too low�
1: Re-connect the 4-core and 28-core at cables,
or seek for maintenance�
2: Seek for maintenance�
3: Check the motor or replace it, and check the
motor cable�
4� Check the power supply according to
charpter1�3�
"Err23" is displayed at
power-on�
1� The motor or output cables are short circuited to
ground�
2� The AC drive is damaged�
1� Measure insulation of the motor and output
cables�
2� Seek for maintenance�
The display is normal upon
power-on, but "HC" is
displayed after startup and
the motor stops immediately�
1� The cooling fan is damaged or the rotor is
locked�
2� A certain terminal is short-circuited�
1: Replace cooling fan, or check the machine
whether it is locking the rotor�
2: Eliminate short circuit�
Err14 is reported frequently� 1� The carrier frequency is set too high�
2. The cooling fan is damaged, or the air lter is
blocked�
3� Components (thermal coupler or others) inside
the drive are damaged�
1: Reduce F0-15�
2: Replace the fan and clean the air lter.
3: Seek for maintenance�
The motor does not rotate
after the AC drive outputs a
non-zero reference�
1� The motor or motor cable is damaged�
2� The motor parameters are set improperly�
3� The cable between the drive board and the
control board is in poor contact�
4� The drive board is faulty�
5� The rotor is locked�
1: Check the motor, or check the cable between
the drive and the motor�
2: Check and re-set motor parameters�
3: Re-connect the 4-core and 28-core at cables,
or seek for maintenance�
4: Seek for maintenance�
5: Check the machine whether it is locking the
rotor�
The DI terminals are
disabled�
1� The DI parameters are set incorrectly�
2� The input signal is incorrect�
3� The wire jumper between OP and +24V is in
poor contact�
4� The control board is faulty�
1: Check and reset DI parameters in group F4�
2: Check the input signals, or check the input
cable�
3: Check the jumper between OP and +24 V�
4: Seek for maintenance�
The drive reports overcurrent
and overvoltage frequently�
1� The motor parameters are set improperly�
2� The acceleration/deceleration time is too small�
3. The load uctuates.
1: Reset motor parameters�
2: Set proper acceleration/deceleration time�
3: Check the machine, or seek for maintenance�
Err17 is reported at power-
on or during running�
The soft start contactor is not closed� 1� Check whether the contactor wiring becomes
loose
2� Check whether the contactor is faulty�
3� Check whether 24 V power supply of the
contactor is faulty�
4� Seek for maintenance
Display at power-on Related device on the control board is damaged� Seek for maintenance�
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