Inovance MD500T75G - Faults and Diagnostics

12. Troubleshooting MD500 User Manual
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12.5 Faults and Diagnostics
Troubleshoot the fault according to the following table. If the fault cannot be eliminated, contact the agent or Inovance.
Operating Panel Display Fault Name
Overcurrent during acceleration
Cause Possible Solution
The output circuit is grounded or short circuited. Eliminate external faults, and check whether short-
circuit occurs on the motor or contactor.
The control mode is SVC or CLVC but
motor auto-tuning is not performed.
Set the motor parameters according to the motor
nameplate and perform motor auto-tuning.
The acceleration time is too short. Increase the acceleration time.
The overcurrent stall prevention
parameters are set improperly.
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The setting of overcurrent stall prevention level (F3-
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The setting of overcurrent stall prevention gain (F3-
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F curve is not appropriate.
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The spinning motor is started. Enable the catching a spinning motor function
or start the motor after it stops.
The AC drive size is small. Replace a large drive.
The AC drive suffers external interference. View the historical fault records. If the current value is far from the
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does not exists, it is the drive board or hall device problem.
Operating Panel Display Fault Name
Overcurrent during deceleration
Cause Possible Solution
The output circuit is grounded or short circuited. Eliminate external faults, and check whether short-
circuit occurs on the motor or contactor.
The control mode is SVC or CLVC but
motor auto-tuning is not performed.
Set the motor parameters according to the motor
nameplate and perform motor auto-tuning.
The acceleration time is too short. Increase the acceleration time.
The overcurrent stall prevention
parameters are set improperly.
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The setting of overcurrent stall prevention level (F3-18) is too large.
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The setting of overcurrent stall prevention gain (F3-20) is too small.
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The braking unit and regen resistor are not installed. ,QVWDOOWKHEUDNLQJXQLWDQGUHMHQUHVLVWRU
The AC drive suffers external interference. View the historical fault records. If the current value is far from the
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does not exists, it is the drive board or hall device problem.
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