Earth fault

What does F00021 mean?

An earth fault has been detected, indicating an insulation breakdown where current is flowing to ground. This occurs when the sum of the phase currents exceeds 5% of the inverter's nominal current, potentially causing personnel hazard, equipment damage, or fire if left unresolved.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect the grounding connections of the motor and inverter for integrity.