Control Power Supply Undervoltage

What does UV2 mean?

An undervoltage condition was detected in the drive's internal control circuit while it was operating. This fault typically points to either an excessive load being drawn by external control wiring connected to the drive's power supplies, or an internal electrical fault, such as a short circuit, on the power or gate drive PCB.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If the fault persists with no external wiring, inspect or replace the internal Power PCB or Gate Drive PCB, as they may have an internal short or component failure.

2. 4

   Check for correct fuse ratings on control power circuits if present.