3181 Wiring or Earth Fault in ABB ACS580 Drive

Fault 3181 – Wiring or Earth Fault in the ABB ACS580 Drive VFD indicates that the drive has detected an incorrect connection between the input power supply and the motor output terminals, or an earth (ground) fault in the power circuit.

3181 Wiring or Earth Fault in ABB ACS580 Drive


The most common cause is that the incoming mains supply has been mistakenly connected to the drive's motor output terminals (U2, V2, W2) instead of the input terminals (U1, V1, W1).

Possible Causes

  • Input power cable connected to the motor output terminals.
  • Incorrect input power wiring.
  • Earth (ground) fault in the input or output wiring.
  • Wiring error during installation.
  • Loose power cable connections.
  • Damaged power cables or terminals.
  • Internal drive hardware fault (less common).

Solutions

1. Check Input Power Connections

  • Verify that the incoming AC supply is connected to the correct input terminals (U1, V1, W1 or L1, L2, L3).
  • Ensure the motor cable is connected only to the output terminals (U2, V2, W2).
  • Correct any incorrect wiring before powering the drive again.

2. Check for Earth Fault

  • Inspect the input and motor cables for damage.
  • Check for insulation failure or cable contact with earth.
  • Measure insulation resistance if necessary.

3. Inspect Cable Connections

  • Tighten all power terminals.
  • Check for loose or damaged connectors.
  • Replace damaged cables if required.

4. Check the Drive

  • If all wiring is correct and the fault persists, inspect the drive for internal hardware damage.

Additional Information

The ABB ACS580 monitors the relationship between the incoming power supply and the motor output circuit. If it detects that the mains supply is connected to the motor output terminals or identifies an abnormal earth fault condition, it generates Fault 3181 – Wiring or Earth Fault.

Typical causes include:

  • Incorrect installation wiring.
  • Motor cable connected to the wrong terminals.
  • Earth leakage or insulation failure.
  • Wiring mistakes after maintenance.

Common Symptoms

  • Drive displays 3181 – Wiring or Earth Fault.
  • Drive will not start.
  • Fault appears immediately after power-up.
  • Motor does not receive output voltage.
  • Drive trips during commissioning.
  • Repeated wiring fault alarms after installation.

Recommended Troubleshooting Sequence

  1. Verify that the displayed fault is 3181.
  2. Disconnect power and follow lockout/tagout procedures.
  3. Verify that the mains supply is connected to the input terminals.
  4. Verify that the motor cable is connected to the output terminals.
  5. Inspect all power wiring for installation errors.
  6. Check the motor and input cables for earth faults.
  7. Tighten all terminal connections.
  8. Correct any wiring errors.
  9. Reset the fault.
  10. Confirm normal drive operation.

3181 Wiring or Earth Fault Check Table

Check PointAction
Input power wiringVerify connection to input terminals (U1/V1/W1 or L1/L2/L3)
Motor wiringVerify connection to output terminals (U2/V2/W2)
Earth faultInspect input and motor cables
Cable insulationCheck for damage or leakage
Terminal connectionsTighten all power terminals
Wiring errorsCorrect incorrect connections
Drive hardwareInspect if the fault persists
Drive operationConfirm normal startup after repair

Preventive Maintenance Tips

  • Verify all wiring before applying power during commissioning.
  • Clearly label input and motor output cables.
  • Periodically inspect power terminals for loose connections.
  • Check cable insulation during routine maintenance.
  • Prevent moisture from entering cable terminations.
  • Inspect cables for mechanical damage.
  • Record recurring 3181 faults to identify installation or insulation issues.
  • Follow ABB wiring and installation guidelines for the ACS580 Drive VFD.

Proper verification of the input power connections, motor output wiring, earth insulation, and terminal connections will help prevent recurring 3181 – Wiring or Earth Fault faults in ABB ACS580 drives, ensuring safe installation, reliable operation, and protection of the drive and motor.

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