1, the sensor faucets window indicator does not light, often water: Check the power supply is normal and the power cord is bad, if the power supply is normal, after adjusting sensing distance (long sensing distance adjustment clockwise, counterclockwise transfer short), hand on the sensor distance sensor faucet, the light is not lit, replace the sensor probe. 2, no one has automatic water sensor faucets: First, check whether the sensor window surface of a foreign body, and whether the induction of a foreign body in front of the window Picks block, if there are foreign bodies, clean the sensor window, if the front of the foreign body in the sensing range, sensing distance adjustable short or re-installation; can not be solved if both the front, then it is the infrared interference reduced ability to produce error sensors, infrared road section should be replaced. 3, indicator light sensor faucets window, often water: First, check whether there are impurities in water-side plug, clean the filter in a timely manner and then as is replacing the impurity, and if not, hand on the sensor faucet sensor distance, carefully listening to the electromagnetic valve Core is working (with the sound on and off, so if there is work to disassemble for cleaning the internal diaphragm solenoid valve, spring, moving core and the solenoid valve chamber, and as is loaded back. If it still often water, replace solenoid valve coil. 4, the sensor window, indicator light, no water: first check whether the disruption of water supply, if not, open the valve for cleaning house, including mold pieces, springs, moving core and the solenoid valve chamber, and then stood back in, install the attention the location of the drainage hole, hand on the sensor faucet sensor distance, did not work if the solenoid valve spool to replace the solenoid valve coil. Source: Faucet so Blog
Source:
http://www.faucetso.info/sensor-faucets/automatic-sensor-faucet-sensor-window-light-is-not-on-common-problems-and-solutions/