F030 fault in WEG CFW900 Drive indicates an IGBT U Desaturation. This means the U-phase power module experienced a severe overcurrent or short circuit, triggering an immediate hardware shutdown.
Cause:
- Short circuit between the motor phases U and V or U and W.
Remedy:
Inspect output motor cables and motor terminal box for short circuits between phase U-V or U-W. If motor connections are correct, verify IGBT state.
