Cause : INV LIMIT comes when the fault is generated when the drive has hit TORQUE INVERTER CURRENT LIMIT or IPP OVERTEMP ALM is active and a period of 200 ms has elapsed. The fault condition is only checked when the generating power is more than 10% of motor nominal power and the speed is greater than 5% of the maximum speed.

1. Check the Speed controller torque settings.
2. Check torque, speed, power limit settings.