Cause : PU logic error comes when power unit memory has cleared. A "PU logic error" in your ABB ACS880 drive signifies a malfunction within the Power Unit (PU) logic.

The 5E04 PU (Power Unit) logic error fault in an ABB ACS880 drive indicates an internal error in the power unit logic. This type of fault generally requires a detailed diagnosis as it could be due to various reasons, such as hardware issues, firmware bugs, or incorrect settings.

1. Cycle the power to the supply unit.
2. If the control unit is externally powered, also reboot the control unit (using parameter 196.08 Control board boot) or by cycling its power.