When it is necessary to open the water pump for continuous drainage, first tighten clockwise with the drainage connector in the DRAIN outlet of the middle partition. At this time, the pump induction device is started, the DRAIN TUBE CONNECTED lamp on the operation panel is on, and a plastic pipe is inserted into the drainage connector, and then the plastic pipe is placed in the drainage area. When the pump function is turned on, when the water tank of the pump is detected to be full of water, the pump starts the drainage work of '90S and then stops working.