Cause : Inverter Overload comes when the Inverter overload protection function has operated based on the internal electronic thermal value. The load is too heavy. The acceleration time, deceleration time and cycle time are too short. The constant setting for speed search is incorrect. (Motor overload occurred due to motor hunting and vibration.)

1. Check the size of the load and the length of the acceleration, deceleration, and cycle times.
2. The constant setting for speed search is incorrect. (Motor overload occurred due to motor hunting and vibration.)
   • Use the speed search function.
   • Adjust the settings of the Speed search operating current (b3-02) and Speed search deceleration time (b3-03).
   • Use the estimated speed search function. (Autotuning for motor line-to-line resistance is required.)
3. The directions of the motor and PG are different. (Only in flux vector control)
   • Correct the PG wiring.
   • Correct the motor wiring.
   • Change the setting of PG rotation (F1-05).
4. The V/f characteristics voltage is too high. Check the V/f characteristics.
5. The Inverter capacity is too low. Replace the Inverter with one that has a larger capacity.
6. Inverter overload occurred when running at a low speed of 6 Hz or less.
   • Reduce the load.
   • Increase the frame size of the Inverter.
   • Lower the carrier frequency.