3220 DC Link Undervoltage Fault in ABB ACS880 Drive

3220 DC Link Undervoltage Fault in ABB ACS880 Drive indicates that the intermediate DC bus voltage has dropped below the minimum allowable level. This typically occurs due to a missing input phase, blown fuse, low supply voltage, faulty switchgear, or a problem in the drive rectifier bridge.

3220 DC Link Undervoltage Fault in ABB ACS880 Drive


The ACS880 continuously monitors the DC link voltage and trips when the voltage becomes insufficient for safe operation.

Possible Causes

  1. Missing input power phase.
  2. Blown input fuse.
  3. Low mains supply voltage.
  4. Loose power cable connections.
  5. Faulty circuit breaker or contactor.
  6. Faulty switchgear.
  7. Supply voltage imbalance.
  8. Rectifier bridge failure.
  9. Poor electrical connections.
  10. Voltage dips caused by large loads on the same power system.
  11. Damaged input power cable.
  12. Utility power supply problems.

Solutions

  1. Check the supply cabling.
  2. Inspect all input power connections and tighten loose terminals.
  3. Check all input fuses and replace any blown fuses.
  4. Inspect switchgear, contactors, and circuit breakers.
  5. Measure the incoming three-phase voltage.
  6. Verify that all three phases are present.
  7. Check for supply voltage imbalance.
  8. Monitor for voltage dips during motor starting or heavy load operation.
  9. Check the rectifier bridge using a multimeter.
  10. Inspect incoming cables for damage or overheating.
  11. Verify that the supply voltage matches the drive rating.
  12. Check actual DC bus voltage in:

01.11 – Actual DC Voltage

Relevant Parameters and Signals

ParameterDescription
01.11Actual DC Voltage

Additional Information

The drive rectifier converts incoming AC power into DC voltage stored in the DC link capacitors.

When one input phase is lost or the supply voltage drops:

  • DC bus voltage decreases.
  • Drive output capability is reduced.
  • The ACS880 generates 3220 DC Link Undervoltage Fault to protect the power electronics.

Common Symptoms

  • Drive trips during startup.
  • Fault occurs when other large machines start.
  • Intermittent drive shutdowns.
  • Low DC bus voltage readings.
  • Fault appears during heavy load conditions.
  • One or more input fuses found blown.

Recommended Troubleshooting Sequence

  1. Measure all three incoming phases.
  2. Check input fuses.
  3. Inspect incoming power terminals.
  4. Verify switchgear operation.
  5. Check for loose cable connections.
  6. Measure DC bus voltage using 01.11 Actual DC Voltage.
  7. Test the rectifier bridge.
  8. Check for power quality issues or voltage dips.
  9. Verify supply voltage balance.
  10. Restore normal supply conditions and restart the drive.

Example

A 400 V AC drive normally maintains a stable DC bus voltage.

If:

  • One input phase is lost,
  • A fuse blows, or
  • The incoming voltage drops significantly,

the DC bus voltage falls below the protection limit and 3220 DC Link Undervoltage Fault is generated.

Related Faults and Warnings

CodeDescription
3220DC Link Undervoltage Fault
3130Input Phase Loss Fault
3210DC Link Overvoltage Fault
A3A2DC Link Undervoltage Warning
3181Wiring or Earth Fault

Preventive Maintenance Tips

  • Periodically inspect input power terminals.
  • Check fuse condition during routine maintenance.
  • Verify incoming voltage balance.
  • Monitor DC bus voltage trends.
  • Inspect switchgear and contactors regularly.
  • Tighten power cable connections.
  • Perform periodic rectifier health checks.

Proper maintenance of the incoming power supply, fuses, switchgear, and rectifier section will help prevent recurring 3220 DC Link Undervoltage Faults in ABB ACS880 drives.

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