2, cleaning services program air system: 2.1 Air Systems Cleaning reason: Most commonly used in central air-conditioning systems coarse filter, air filter out up to 40 percent of respirable particulate matter, more than half of respirable particulate matter will enter central air conditioning system. On the one hand, these respirable particulate matter may become carriers of the virus, the virus in the air duct flow propagation, resulting in cross-infection; on the other hand refrigeration equipment, accessories, small particles of respirable particulate matter interconnected become a big dust accumulated in the air duct The bottom and corners, over the edge breeding microorganisms (such as Legionella). Wind systems exist with these viruses and microbes ease of duct was sent around the room, the secondary cause of indoor air pollution in industrial refrigeration equipment, which people live and work environment and long-term harm to the refrigeration equipment maintenance, cause reduced efficiency refrigeration equipment, and prone to respiratory diseases. Therefore, it is necessary to periodically conduct a thorough cleaning and disinfection of air system work. 1. Causes of low pressure alarm insufficient refrigerant. Solution: leak detection, pipe joints for leaks after patching add refrigerant point?. 2. The filter is clogged. Solution: washable or replace the filter. 3. brass condenser fouling much smaller diameter, the heat worse. Solution: Clean the condenser brass. The expansion valve opening is too small. Solution: appropriate to reduce the degree of expansion valve opening, after exclusion of high and low voltage protection is automatically reset. Refrigeration plant | Snow Dragon refrigeration (certified) | refrigeration equipment provided by the Dongguan City-long Refrigeration Electrical and Mechanical Equipment Engineering Co., Ltd .. Dongguan City-long Refrigeration Electrical Equipment Engineering Co., Ltd. (www.dgxuelong.com) is Dongguan, 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, the maximum meet customer needs. In the Snow Dragon refrigeration leadership with the staff warmly welcome all inquiries negotiations to create a better future XUELONG refrigeration.