Cause : Over load comes when the motor is drawing excessive current exceeding the drive's capacity for a sustained period.

The ol fault in delta drive indicates an overload condition. This means the drive detects that the output current exceeds its safe operating limit for a certain duration.

1. Reduce the load.
2. Increase the setting value for (accel./decel. time).
3. Replace the drive with a larger capacity model.
4. Check the status of three-phase motor.
5. Check if the cable is broken or the screws are loose.