Over-current during deceleration:

1. Short-circuit at motor output.
2. Deceleration time too short.
3. AC drive output capacity is too small.

1. Check for possible poor insulation at the output line.
2. Increase the deceleration time.
3. Replace with the AC drive with one that has a higher output capacity (next HP size).

Check drive rectifier & IGBT using multimeter.
Check wiring.
Check drive hardware using multimeter.