E.PU fault in KEB COMBIVERT R6 Drive indicates a power unit error. This means there is a general hardware failure on the power stage or excessive line sag issues impacting the transformer grounding.
Cause:
Error on the power stage.
Remedy:
General error on the power stage. Check grounding of the transformer. If the error is always active, the unit must be sent in for evaluation. If intermittent, it may indicate excessive line sag conditions.
