!!
critical Allen

Error Code F038

Phase U to Gnd fault (between drive and motor).

? What Causes This

Grounding issues between the equipment and its connection points.

How to Fix It

- Check wiring between drive and motor. - Examine motor for grounded phases. - Replace faulty hardware as necessary.

Source: page 162 of the official manual

From the manual

Manual page 162 — Allen error F038

This error code appears in:

Allen Bradley Powerflex 525