AL023 alarm in delta servo drive indicates Early warning for overload. This means the drive is approaching its overload limit and may soon trigger a full overload alarm.

1. Check if it is used in an overload condition.
2. Verify that the load on the motor is within its rated capacity.
3. Reduce the load or increase the motor's capacity if necessary.
4. Check parameter to ensure that the current limit and torque limit parameters are set appropriately for the application.