A3A1 DC Link Overvoltage Warning in ABB ACS880 Drive

A3A1 DC Link Overvoltage Warning in ABB ACS880 Drive indicates that the intermediate circuit (DC Link) voltage is too high while the drive is stopped. This warning is typically related to an incorrect supply voltage configuration or excessive incoming mains voltage.



If the supply voltage setting does not match the actual power supply, the drive may calculate incorrect voltage limits, potentially causing unexpected motor behavior or excessive loading of the braking system.

Possible Causes:

  1. Incorrect supply voltage setting.
  2. Parameter 95.01 – Supply Voltage configured incorrectly.
  3. Incoming mains voltage higher than the drive rating.
  4. Voltage spikes or transient overvoltage on the supply.
  5. Incorrect drive commissioning.
  6. Wrong parameter set loaded into the drive.
  7. Brake chopper operating incorrectly.
  8. Excessive DC bus voltage due to power quality issues.
  9. Regenerative energy remaining in the DC bus.
  10. Internal voltage measurement issue.

Solutions:

  1. Check the actual incoming mains voltage.
  2. Verify the drive nameplate voltage rating.

  3. Check the setting of:

    Parameter 95.01 – Supply Voltage

  4. Ensure that the configured supply voltage matches the actual power supply.
  5. Measure phase-to-phase input voltage and confirm it is within ABB specifications.
  6. Check for abnormal voltage fluctuations or transient overvoltages.
  7. Verify correct commissioning parameters.
  8. Inspect the brake chopper and brake resistor if installed.
  9. Review recent parameter changes or downloads.
  10. Reset the warning after correcting the voltage configuration.

Important Note

ABB specifically notes that an incorrect setting of:

Parameter 95.01 – Supply Voltage

may result in:

  • Uncontrolled motor acceleration ("motor rush").
  • Incorrect DC bus voltage calculations.
  • Overloading of the brake chopper.
  • Overheating of the brake resistor.
  • Improper drive protection operation.

For this reason, the supply voltage parameter must always match the actual drive supply voltage.

Additional Information

The DC Link is the internal DC bus that stores energy between the rectifier and inverter sections of the drive. If the DC voltage exceeds the expected value while the drive is stopped, the ACS880 generates A3A1 DC Link Overvoltage Warning.

Common causes include:

  • Incorrect voltage category configuration.
  • High mains voltage.
  • Voltage surges.
  • Brake system issues.
  • Incorrect commissioning data.

Recommended Troubleshooting Sequence

  1. Measure the incoming mains voltage.
  2. Verify the drive voltage rating.
  3. Check Parameter 95.01 – Supply Voltage.
  4. Confirm that the parameter matches the actual supply voltage.
  5. Inspect the brake chopper and resistor (if fitted).
  6. Check for power quality issues and voltage surges.
  7. Restart the drive and monitor the DC bus voltage.

Relevant Parameter

ParameterDescription
95.01Supply Voltage

Correct configuration of Parameter 95.01 – Supply Voltage and maintaining the incoming supply voltage within specification will help prevent recurring A3A1 DC Link Overvoltage Warnings in ABB ACS880 drives.

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