Direct Ground Short-Circuit (Hard Detection)
Schneider Electric · Altivar Machine ATV320 Variable Speed Drive
What does SCF3 mean?
A hard detection of a direct ground short-circuit. This indicates a severe fault where a motor phase or internal component is directly shorted to earth ground. This condition poses a significant safety hazard and can cause severe damage to the drive. This fault can be manually cleared if the 'Reset restricted fault configuration' (HrFC) parameter is set to 'Yes'.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Inspect the motor cable for any damage or moisture ingress causing a ground fault.
- 4
Check the drive's output terminals and internal components for any signs of arcing or carbon paths to ground.
- 5
If the external wiring and motor are clear, the drive's power section may be damaged and require service.