Earth leakage

What does AE02 mean?

The supply unit generates a warning when an earth fault or current unbalance is detected. This indicates a potential insulation issue within the supply unit's power circuit or its input cabling, requiring attention to prevent a full fault trip or damage.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Measure insulation resistance on the supply side components (e.g., input reactor, filter) and input cabling with a megohmmeter.

2. 4

   Review parameter 31.120 (LSU earth fault) settings for the supply unit's earth fault detection sensitivity.