Motor Short-Circuit

What does -SCF mean?

This fault indicates a short-circuit or ground fault has occurred at the output of the drive controller, either in the motor cables or within the motor itself. This is a critical fault that can severely damage the drive controller's output stage (IGBTs) if power is maintained. Immediate action is required to prevent component failure.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Using a multimeter, check for continuity between motor phases, and between each phase and ground. Perform an insulation resistance test (megger) on the motor windings and cables to ground, ensuring insulation integrity (expect >1 MΩ).