Generally speaking, when the valve of the electrical control box is fully open, the green indicator of valve opening displayed on its panel will light up. When it is fully closed, the yellow indicator light will be on at its position. However, when using the control box, if it is in the middle of full open or full close, both indicators will not be on. When it releases the remote control, the indicator light showing the remote control will be green. When it works on site, the status will show the red indicator light.