10. Troubleshooting
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10.6 Symptoms and Diagnostics
The following symptoms may occur during use of the AC drive. When these symptoms occur, perform
simple analysis based on the following table.
Operating Panel Display Fault Description
There is no display while power-on.
Cause Possible Solution
The mains voltage is not input or too low. Check the power supply.
The switching power supply on drive board of the AC
drive is faulty.
Check bus voltage.
Check that the 24V output and +10V output on
the control board are normal.
Wires between control board and drive board and
between control board and operating panel break.
Re-connect the 8-pin wire and 40-pin wire.
Pre-charge resistor of the AC drive is damaged. Contact the agent or Inovance.
Control board or operating panel is faulty.
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Operating Panel Display Fault Description
"HC" is displayed while power-on.
Cause Possible Solution
Wire between drive board and control board is in poor
contact.
Re-connect the 8-pin wire and 28-pin wire.
Related components on control board are damaged Contact the agent or Inovance.
The motor or motor cable is short circuited to ground.
The hall is damaged.
The mains voltage is too low.
Operating Panel Display Fault Description
"Err23" is displayed at power-on.
Cause Possible Solution
Motor or motor output cable is short circuited to
ground.
Use a megger to measure insulation resistance
of motor and motor cable.
The AC drive is damaged. Contact the agent or Inovance.
Operating Panel Display Fault Description
The display is normal while power-on. But after
running, “HC” is displayed and the drive stops
immediately.
Cause Possible Solution
The cooling fan is damaged or locked-rotor occurs. Replace the fan.
Short circuit exists in wiring of control terminals. Eliminate short circuit fault in control circuit
wiring.
Operating Panel Display Fault Description
Err14 (IGBT overheat) is detected frequently.
Cause Possible Solution
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 Inovance.
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