Inovance MD500T75G - Symptoms and Diagnostics

MD500 User Manual 12. Troubleshooting
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12.6 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 at power-on.
Cause Possible Solution
There is no power supply to the AC drive or the
power input to the AC drive is too low.
Check the power supply.
The switching mode power supply on the
drive board of the AC drive is faulty.
Check the bus voltage.
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The buffer resistor of the AC drive is damaged. Contact the agent or Inovance.
The control board or the operating panel is faulty.
The cable connecting the control board and the
drive board and the operating panel breaks.
Operating Panel Display Fault Description
"HC" is displayed at power-on.
Cause Possible Solution
The cable connecting the drive board and
the control board is in poor contact.
Re-connect the 8-core and 28-core cables.
Related components on the control board are damaged Contact the agent or Inovance.
The motor or the motor cable is short circuited to the ground.
The hall device is damaged.
The line voltage is too low.
Operating Panel Display Fault Description
"Err23" is displayed at power-on.
Cause Possible Solution
The motor or the motor output cable is
short-circuited to the ground.
Check insulation of the motor and the output cable with a megger.
The AC drive is damaged. Contact the agent or Inovance.
Operating Panel Display Fault Description
The AC drive display is normal upon power-on. But after
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Cause Possible Solution
The cooling fan is damaged or locked-rotor occurs. Replace the damaged fan.
The external control terminal cable is short circuited. Eliminate external short-circuit fault.
Operating Panel Display Fault Description
Err14 (module overheat) is reported frequently.
Cause Possible Solution
The setting of carrier frequency is too high. Reduce the carrier frequency (F0-15).
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Components inside the AC drive are damaged
(thermal coupler or others).
Contact the agent or Inovance.
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