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General safety precautions for the use and maintenance of screw compressors 1. The operation, repair and maintenance of the compressor must be carried out by qualified personnel. 2. The compressor cannot be reversed. After initial start-up or maintenance of the electronic control system, you must first confirm whether the motor rotation direction is consistent with the specified rotation before starting the compressor. 3. When disassembling high-temperature components, the temperature must be cooled to ambient temperature before proceeding. 4. It is recommended to use special oil for screw compressors. Different brands of lubricants are not allowed to be mixed. 5. Do not make any changes to the compressor or add any devices that affect the safety and reliability without the permission of the manufacturer. 6. Original spare parts of the compressor are specially designed and manufactured. It is recommended to use authentic spare parts to ensure the reliability and safety of the compressor. 7. It is absolutely not allowed to block the suction port of the compressor during operation. 8. Compressed air is never allowed to be used for breathing unless it is marked for breathing. 9. Do not operate the compressor above the specified pressure and temperature. 10. Once the compressor is found to be working abnormally, the compressor should be stopped immediately and the abnormality should be eliminated in time. 11. Use the correct tools to maintain and repair the compressor. 12. After maintenance and before starting up, confirm that all safety devices have been reinstalled and tools have been removed from the compressor. Maintenance 1. Check the oil level, exhaust temperature and exhaust pressure daily, and check for abnormal sounds. ； 2. Open the separator drain valve to discharge the condensate before starting the machine every week, check for leaks everywhere, check the safety valve, and check the belt wear (visual inspection) ； 3. Regularly check the air intake control valve, minimum pressure valve, electric control box connecting wire terminals, safety valve, and cooling fan ； 4. Regularly clean and clean the cooler and test the reliability of the safety valve ； 5. Regularly replace the oil filter element, oil separator filter element, air intake filter element and lubricating oil. Common troubleshooting 1. The machine does not start: Check the main switch and power cord, check the motor ； 2. The machine does not load after starting up.: Adjust the pressure switch setting value or replace the pressure switch, check or replace the solenoid valve ； 3. The compressor is not unloaded and the safety valve is released.: Adjust the pressure switch setting value or replace the pressure switch, check or replace the solenoid valve ； 4. Excessive fuel consumption: Use oil as recommended, lower the oil level to the normal position, remove the oil return pipe for cleaning, and replace the oil and gas separator filter element. ； 5. The exhaust pressure is lower than the specified value: Reduce gas consumption or increase compressor, check system leaks, clean or replace air intake filter element, replace oil and gas separator filter element, check or replace solenoid valve, overhaul air intake control valve, replace belt, adjust pressure switch setting value ； 6. Compressor shuts down due to high temperature protection: Improve environmental ventilation conditions, clean or clean the cooler, add oil to the specified position, and replace the oil filter. 7. The compressor is running unloaded, the exhaust pressure still rises slowly, and the safety valve is released: Check or replace solenoid valves, inspect air intake control valves, and inspect unloading pipes ； 8.Safety valve relief: Repair or replace the safety valve, repair the minimum pressure valve, replace the oil and gas separator filter element, repair or replace the pressure switch, check the intake control valve or solenoid valve