Step 1: Turn the treadmill sideways, remove the screws under the motor cover, and then turn the treadmill back over.
Step 2: Remove the motor cover, unplug the AC cable connected to the power switch on the controller, then unplug the two AC cables connected to the motor on the controller, and finally remove the communication cable connected to the controller on the display.
Step 3:The third step: take down the two screws that fixed the controller in the main frame, and then put the new controller for up, and fixed it.
Step 4: plug the two AC wires of the motor into the controller (red to m + black to m-), then plug the two AC wires of the switch connected to the controller, and finally tightly plug the communication line of the controller connected to the display.
Step 5: put on the motor cover, and turn the treadmill over to lock the screws securing the motor cover.