A detailed description of Nanjing Wuzhou screw compressor maintenance: status and the reasons for screw compressor chiller compressor appears fluoride-resistant motor protection switch activating 1. load caused by large suction superheat. 2. The high pressure is too high, the load is too large. 3. coil protection switch failure. 4. The electrical system failure or bad. 5. poor motor coil, heating too. 6. 25% longer run adverse motor cooling. 7. frequent starts. Modified load solenoid valve 1. The temperature is too unstable, high oil viscosity. 2. capillary obstruction. 3. The capacity control solenoid bleed orifice obstruction. 4. The capacity control solenoid valve coil failure. 5. capacity control piston ring wear can not not be completely airtight, poured into the refrigerant capacity control hydraulic cylinder. 6. capacity control oil line blocking. 7. The oil filter clogging. 8. insufficient amount of oil (oil shortage). 9. The system of temperature switch failure. Compressor does not start or Y- △ can not start 1. Capacity slider can not reply to empty state, resulting in heavy vehicles start. 2. The voltage is too low. 3. Voltage errors. 4. motor failure. 5. owe phase, reverse phase operation. 6. The motor protection switch actuation. 7. motor coil wiring errors. 8. The relevant section of the exhaust valve is not open (high voltage switch actuation). Abnormal vibration or noise screw compressor maintenance program 1. large bearing breakdowns. 2. The body's internal fixing screws loose. 3. The friction between the rotor and the casing or friction. The oil loss. 5. The internal parts are loose. 6. Electromagnetic Acoustic. 7. a foreign substance enters. 8. The compressor and piping system resonance. Bitzer compressor discharge temperature alarm maintenance 1. superheat. 2. The high pressure is too high, the load is too large. 3. The oil loss. 4. bearing damage. 5. motor overheating. 6. The compression ratio is too large. Han Zhong compressor superheat starvation protection alarm 1. insufficient excess liquid refrigerant, causing adverse oil return. 2. The system is inadequate design flow rate, matching unreasonable. 3. The system or the corners of the large oil storage area, resulting in lack of refrigeration oil, the need to add frozen oil. Free Phone: 15101068925 QQ: 1599280734 Off Workers