Cause : Ground fault

Corrective Actions:
When (one of) the output terminal(s) is grounded, short circuit
current is more than 75% of AC motor drive rated current, the AC
motor drive power module may be damaged.
NOTE: The short circuit protection is provided for AC motor
drive protection, not for protection of the user.
1. Check the wiring connections between the AC motor drive and
motor for possible short circuits, also to ground.
2. Check whether the IGBT power module is damaged.
3. Check for possible poor insulation at the output line.