Third, the various types of equipment maintenance work: ③ pump maintenance: seal repair or replacement, cleaning filters. ④ air conditioning unit maintenance: fins and filter cleaning, adjustment and other fans overhaul. ⑤ fan coil maintenance: filters and air cleaning, adjustment and other electrical maintenance. Maintenance ⑥ softener: Added handling salt, and other control equipment maintenance adjustment. 3. brass condenser fouling much smaller diameter refrigeration equipment maintenance, poor heat dissipation. Solution: Clean the condenser brass. 4. Too many refrigerant. Solution: excess refrigerant emissions. 5. The expansion valve opening is too large. Solution: appropriate to reduce the expansion valve opening degree, the compressor protection thermal relay valves (RESTET) pressed to identify the cause of refrigeration equipment, refrigeration Snow Dragon (certified), refrigeration equipment by the Dongguan City-long Refrigeration Electrical Equipment Engineering Co., Ltd. available. 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.