To boost the productivity of your processes, Improve energy efficiency and reduce the maintenance cost An ac drive is a device that is used to control the speed of an electrical motor. The AC Motor Drives are able to efficiently control the motor speed, Improve the machine automation and save energy. The AC Drive has a comprehensive fault diagnostic system that includes several different alarm and fault message. Once the fault is detected, the corresponding protective functions will be activated to shut down the AC Drive output.The fault descriptions, for a fault shown on the AC Drive digital display. After the fault has been cleared , Switch the Run/Stop key to stop mode to reset the AC Drive.