... function, high security 3.Stable performance , long life Automatic Step*Control system:*Motor*Package:Intelligent control system: *automatic lift, easy to use ... sides, then connect the controller power. At this time, the step will be automatically retracted. Then press the install button, the ... a frequency of 0.5 seconds , the controller or the motor is abnormal , need to power unplug 3 seconds and then ...