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.

Complete Troubleshooting Guide

1. 1

   Immediately remove all power from the drive controller.

2. 2

   Disconnect the motor cables from the drive controller's output terminals (U/T1, V/T2, W/T3).

3. 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).