Meaning of the indication
The fault route is output short-circuit evidence: cable, motor, output terminals, output accessories, IGBT module and driver/current-sense circuitry.
Checking order
- Classify trip timing: instant enable, acceleration or load step.
- Disconnect motor cable only under approved lockout and verify whether the alarm condition changes.
- Inspect output terminals for loose strands or contamination.
- Check for unauthorized output capacitors or surge devices.
- After any module replacement, verify gate-driver health before full-power testing.
Suspect areas
Output cableMotor windingOutput accessoriesIGBT moduleGate driverCurrent feedback