Cause : Ground Warning comes when a current path to earth ground has been detected at one or more of the drive output terminals. 

• Check the motor and external wiring to the drive output terminals for a grounded condition.
• The ground current has exceeded the level set in P467 [Ground Warn Lvl].

1. A current path to earth ground greater than 25 % of drive rating has occurred.
2. Check the motor and external wiring to the drive output terminals for a grounded condition.
3. Check the programming.
4. Check for excess load, and other causes of excess current. Insulation Resistance (IR) test the wiring to motor.