F1103 fault in WEG CFW900 Drive indicates a Slot A Accessory Connection Error. This means the drive lost physical or electrical communication with the card installed in Slot A.
Cause:
Loss of communication with the accessory.
- Above-supported electromagnetic noise.
- Vibration above supported limits causing connector problems.
- Corrupted accessory firmware.
Remedy:
Reduce local electromagnetic noise and structural vibrations. Inspect physical terminals and check accessory board firmware state.
