Repairman central air conditioning system every six months once all valves conservation. For the throttle pipe and valve should be checked for leaks, the case should be pressurized packing, check valve opening and closing is flexible air duct cleaning, opening and closing difficult if you should add oil, if the valve is broken, you should Replace with the specifications of valves, flanges, valves should be checked for leaks at the flange connection Tangshan air duct cleaning, the case should replace the seal pads; for solenoid valves, pressure regulating valve duct cleaning solution, wherein the drying filter To check blockage or moisture absorption, the case shall be replaced with the specifications of dry filter, regulator valve by-pass off test checks the electromagnetic, pressure regulating valve action is reliable, if the problem should be replaced with the specifications of the solenoid valve, pressure regulator valve wind tube cleaning prices, the stem portion of filling oil pressure leak should be pressurized packing filler. Maintenance and repair: 1. normal operation maintenance (each) 1) check the oil pressure and oil refrigeration compressor oil; 2) system leak detection (refrigerant), find the leak in time; 3) Check There are no unusual noise, vibration and temperature; 4) Check the condenser and the cooler temperatures, pressures; 5) examine the various valves are normally 6) Check out the chiller water temperature and pressure; 7) Check the main circuit wiring terminals and compacted; 8) Check electrical control; 9) Check the lubrication system unit; 10) inspection of the instrument, working status of the controller; 11) to keep the device in a clean state. Tianjin duct cleaning | central air-conditioning maintenance (certified) | duct cleaning provided by Jinan Durkin central air-conditioning Engineering Limited. Jinan Durkin central air-conditioning Engineering Co., Ltd. (www.djzyktgc.com) Shandong Dezhou, 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. Central air conditioning leader in Germany with the staff warmly welcome all inquiries negotiations to create Durkin central air conditioning a better future.