Freon direct cooling test machine is an important equipment in the test equipment industry, in order to ensure its long-term stable operation and refrigeration effect, it needs to carry out standard maintenance. The following is the specific maintenance plan:

　　1. Daily inspection

　　1. Check whether the valve opening status of each system meets the requirements before starting the system every day to ensure that the valve of the refrigerant system, oil system and water system is in the correct state.

　　2, check the oil level of the oil lens to ensure that it is within the specified range (1/2-3/4). If the oil level is too low, it should be added in time to ensure the effective lubrication of the moving parts of the machine.

　　3, check whether the power supply voltage meets the boot requirements, and the phase fluctuation should be less than plus or minus 5% to ensure the stability of the electrical system.

　　Second, regular maintenance

　　1. After the compressor is put into operation, the lubricating oil should be replaced once for 100 hours in the initial operation, and the dirty unit oil should be replaced once every three years or irregularly according to the situation. At the same time, clean the oil filter and blockages to maintain the cleanliness of the system.

　　2, regularly check the heating effect of the crankcase oil heater, the unit with long-term power failure must be powered up first, when the oil temperature is higher than the indoor temperature 15-20 degrees, you can start.

　　3, regularly check the condenser water level and the operation of the fan and water pump. The air-cooled condenser should be well ventilated, and the suction temperature should not exceed 38 degrees. For water-cooled condensers, water flow and water quality should be checked to prevent scaling and blockage.

　　4, every six months to carry out a comprehensive inspection of the control system, including temperature sensors, pressure sensors, electrical components, etc., to ensure its accuracy and reliability.

　　Third, maintenance and maintenance precautions

　　1, before any maintenance work, the power must be turned off to ensure that the equipment is in a safe state.

　　2, the use of qualified tools and materials to avoid damage to the equipment.

　　3, in strict accordance with the manufacturer's recommendation to choose the appropriate lubricants and refrigerants.

　　4, keep the unit around clean and dry, reduce the humidity in the compressor room, in order to reduce the corrosion of the control electrical components.

　　5. Carry out regular comprehensive inspection of the unit, timely discover and deal with potential problems, and ensure the long-term stable operation of the equipment.

　　Through the above maintenance program, we can ensure the long-term stable operation of the Freon direct cooling test machine, extend the service life of the equipment, and improve the refrigeration effect.