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Trouble shooting and Solutions
Fault Name
Possible Causes
Solutions
"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 shortcircuited to the
ground.
4. The power supply is too low.
1. Re-connect the 4-core and 28-
core flat 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
.
The display is
normal upon
power-on, but "HC"
is displayed after
start 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 filter 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
filter.
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 flat 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 fluctuates.
1. Reset motor parameters.
2. Set proper acceleration/
deceleration time.
3. Check the machine, or seek for
maintenance.