Step 1: Unscrew the screws that fix the upper cover of the motor, and open the motor cover.
Step 2: Remove the communication cable, motor cable and AC wire whichconnected to thecontroller. Remove the screws securing thecontroller, and then take out the lower control.
Step 3: Install the new controller and fix with the screws, then plug in the communication cable, power switch AC wire and motor cable.
Step 4: Close the motor cover and tighten the screws that fix the motor cover.