Earth leakage warning

What does A2B3 mean?

The drive has detected an earth (ground) fault or current unbalance in the motor or motor cable, but it is configured to issue a warning rather than trip. While allowing continued operation, this indicates a potentially developing safety issue or insulation degradation that requires immediate attention before it escalates to a full fault.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify proper grounding of the motor frame and the drive's protective earth connection.

2. 4

   Consider changing parameter 31.20 to 'Fault' if the condition is critical and requires a trip rather than a warning.