Earth Fault / Output Current Unbalance

What does 2330 mean?

The drive has detected a load unbalance, typically due to an earth fault in the motor or motor cable, or excessive output current unbalance in an inverter unit (for parallel connected modules). This condition poses a significant electrical safety risk, can lead to equipment damage, insulation breakdown, or fire, and indicates an internal fault if external causes are ruled out.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   For parallel connected inverter modules, if external faults are ruled out, identify the 'xx' module number and inspect that specific inverter unit.

2. 4

   If no external fault can be detected after thorough checks, contact your local ABB representative for internal fault diagnosis.