Cause : PU logic error comes when power unit memory has cleared. The fault code 5092 in your ABB ACS880 drive indicates a power unit (PU) logic error. This means the drive's internal control system has detected an issue within the power unit's logic or memory.

1. Cycle the power to the drive.
2. If the control unit is externally powered, also reboot the control unit (using parameter 96.8 Control board boot) or by cycling its power.