Close the door of the control panel, and there is confirmation switch on the operation of the door, i.e. the fluorescent lamp is off, the fan will open.
Close the door of the control panel and confirm that the switch on the door is in motion, i.e. the fluorescent light will go out and the fan will turn on.
Close the door of the control panel and make sure that the switch on the door acts, that is, the fluorescent lamp will go out and the fan will turn on.