Teach you how to diagnose air conditioning is not the lack of fluoride air conditioning freon refrigeration and heat are needed to help, so once the lack of freon, air conditioning will be a series of reactions, such as the cooling effect decreased significantly. Serious or even air conditioning compressor does not start automatically protected. So the lack of fluoride for an air conditioner is a very serious problem, here are a few ways to judge conditioning lack of fluoride. 1. The low-pressure pipe (crude pipe) dry, touch, and feel there is no ice. This is because of the lack of freon, the evaporator which reduces the boiling point of the refrigerant, the refrigerant temperature of the low-pressure pipe in the valve increases. 2. The high-pressure pipe frosting. The reason is that the pressure drop within the tube, a lower boiling point, the high pressure pipe temperature is below freezing, the air in the water turns into ice. 3. Turn on the machine panel, remove the filter, naturally you can see above the evaporator frost. If frosting is less area is small, indicating lack of refrigerant resulting in reduced cooling capacity. The outdoor unit without thermal exhaust. The reason is lack of the refrigerant, resulting in condensing pressure and temperature decrease. 5. The machine drains, water less or not at all, no water. This is because the lack of fluoride leads to decreased cooling capacity, the condenser can not condensate. 6. From the outdoor unit charge fluoride mouth measured pressure is lower than 0.45MPa. The reason is that the refrigerant shortage, leading to the evaporation pressure drops. If only the low-pressure gas pipe valve frost, proved to be only a trace amount of lack of fluoride, the ambient temperature is too low; two valves are frost, indicating the system has secondary throttle phenomenon. Winter fluoride specific steps: 1, hit the heating mode, the fluorine at the table received a thick tube, find the cord pulled out after a four-way valve cooling state, will add fluoride in the four-way valve plug, see heating the pressure and current (mainly to see the current, the current relatively quasi), not enough to be pulled out so repeatedly rated far fluoridation process often feel under two tube temperatures, thin tube with hot, thick tube a little hot on OK. 2, quantitative fluoride, according to the nameplate on the air conditioning equipment used, how many kilograms of fluorine to increase the number of kilograms. When we judged that the system is blocking me from simple to complex in accordance with the recommendations of Xuzhou hand air conditioning maintenance, reduce costs to deal with. A severe fouling system, we can choose to let go of the refrigerant, welding opened cooling tube group for blowing dirt with high pressure nitrogen, put fluoride in time to pay attention, the best situation in the air conditioning and heating, quickly open the rough cut copper valve cap, let refrigerant spray instantly, you can put the system out of the dirt. In too cold weld the tube group must pay attention to the one-way valve to cool. 2 carbon tetrachloride cleaning method: This method put the system into the dust, or when the compressor refrigeration oil after burning a paste using carbon tetrachloride is corrosive, volatile prices Xuzhou used central air conditioning, so in When cleaning the system must take down the one-way valve, four-way valve, compressor welding, to avoid its corrosion. Can be used with a vacuum-powered air conditioning Xuzhou transfer of system piping repeated cleaning, after cleaning, use a high-pressure nitrogen blow residue, carbon tetrachloride under nitrogen volatilization quick action to reduce the corrosion of the system. 3 plus dry filter method: After the success of both methods 1 and 2 need to add air conditioning back on dry pipe filter, allows the system in the water, refrigeration oil impurities, dirt filtered out. 4-way valve commutation law: when the system is often stuck in the capillaries usually blocking the front or the back, we instantly give way valve is energized, power to change the flow of the refrigerant, the dirt stuck in the capillary at the red open, so that the normal flow of the refrigerant to achieve the cooling and heating purposes. 5 welding baking method: When the system is blocked when the oil in the capillary at the frost phenomenon, we are available at welding bake frosting to reduce the viscosity of the oil, allowing the system to normal operation. Xuzhou hand air conditioning maintenance, refrigeration Sheng Erda (certified), second-hand air conditioning provided by 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.