Applicable Systems
AC500
AC590
ACS580
ACS880
Symptoms
IGBT overcurrent detected in output stage.
Possible Causes
- IGBT module short circuit
- Output cable short
- Motor winding short
Troubleshooting Steps
- Step 1: Disconnect motor and power on drive
Fault clears without load - Step 2: Megger test motor windings
Insulation > 1 MOhm - Step 3: Replace drive if IGBT is shorted
New drive runs motor normally
How to Reset
Power cycle; replace drive if IGBT is shorted.
Source: ABB ACS510/550 User Manual, ABB Drives
Category: PLC & VFD