Xuzhou 圣尔达 Refrigeration Electrical Services Ltd. fan does not run Cause 1: The master switch is bad exclude: master switch with a multimeter to measure the contact resistance, the resistance is too large or zero Xuzhou Hitachi central air conditioning sales, should be repaired or Replace the handle Cause 2: The fan motor coil damage exclusion: use a multimeter to check, replacement of the same size, the same reason the fan motor speed 3: between the fan motor and fan set screws loose exclusion: the set screw tightening Reason 4: fan capacitor circuit or short circuit excluded: Check the capacitor, the capacitor in the replacement of the same specifications Xuzhou 圣尔达 Refrigeration Electrical Services Limited ☆ processing an inner wall of the spiral thread brass textured brass. And smooth wall of brass (light pipe) compared to Xuzhou air conditioning repair parts, due to the inner wall is processed into a spiral brass textured inner wall area can be increased, so the refrigerant flow in the brass, you can increase the heat between the two Xuzhou exchange area home air conditioning service, thereby improving the heat exchange efficiency. Eight, air conditioning basics: ☆ Why can cooling and heating air conditioner air conditioner works, in a nutshell, is to absorb heat from the lower temperature of the air, again higher temperature exhaust air heat. ☆ air conditioner brief history of the development of a single fixed speed AC inverter air conditioning → → → DC variable speed PWM DC variable speed air conditioning air conditioning PAM. Xuzhou hand air conditioning recovery | Sheng Erda refrigeration (certified) | Air conditioning is provided by Xuzhou Xuzhou 圣尔达 Refrigeration Electrical Services Limited. Xuzhou Sheng Erda Refrigeration Electrical Services Limited (xzktw.com) Xuzhou, Jiangsu, heat, refrigeration and air conditioning equipment leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Sheng Erda leader in refrigeration staff warmly welcome all inquiries negotiations to create a better future Sheng Erda refrigeration.