Problem Description:The power switch is on, and the display on the motor cover is not on.
Reason Analysis:
1)Behind the power switch, the AC line connected to the controller is loose
2)communication cable of the controller connected to the display is loose
3)The control is burned out
4)Display damaged
Solutions:
1)Open the motor cover, if the controller light is on, indicating that the controller is normally energized, then you need to check whether the white line plug which connected the display on the motor cover and the controller is loose, not plugged in or whether the pins are bent. If it is loose or not plugged in, then you need to plug it in
2) If the pins are bent, the pins can be set right
3)Check whether the fuse on the controller is blown. If it is blown, replace the fuse. If the display still does not light up after replacing the fuse, the controller should be replaced
4)If the controller lights up normally and the communication cable connected to the controller on the display is not loose or disconnected, replace the display