Controller Power Supply Undervoltage

What does Controller Undervoltage mean?

The internal power supply providing voltage to the drive's control circuits is operating below its nominal level. This is an internal hardware fault that can prevent the drive's logic and control functions from operating correctly, potentially leading to system instability or failure to start.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If the fault persists after power cycling, it indicates a failure within the drive's internal controller power supply, and the drive should be replaced.