Applicable Systems
AC500
AC590
ACS580
ACS880
Symptoms
Power module HB1/HB2 short circuit detected.
Possible Causes
- HB1 or HB2 IGBT module short circuit
- Gate driver failure causing IGBT shoot-through
- Power module internal damage
Troubleshooting Steps
- Step 1: Power cycle the drive
Fault may clear if transient - Step 2: Inspect IGBT module for physical damage
No burn marks or swelling - Step 3: Replace power module if fault persists
New module initializes without fault
How to Reset
Power cycle; replace power module if fault persists.
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Source: ABB ACS580 Firmware Manual
Category: PLC & VFD
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