Common faults and maintenance methods of air-cooled chillers

Common faults and maintenance methods of air-cooled chillers

Air-cooled chillers are installed outdoors without any obstruction, and are easily affected by outdoor light. So how to maintain good ventilation, good environment and space has a key impact on the cooling effect of the chiller. So, what are the common faults and their causes in the operation of air-cooled chillers and how to repair okmarts.com?

　　 1. Compressors start and stop frequently

　　 When the amount of refrigerant in the air-cooled chiller is too much or too little, the pressure protection switch is activated, the exhaust pressure is too high or the suction pressure is too low, and the water system circulation is poor, and the evaporator surface is frosted. The okmarts.com chiller repair method is to determine when the refrigerant is too much, the excess refrigerant can be released at the exhaust port, if not, check for fluorine leakage and make up the refrigerant. Check whether the water circulation system is blocked or there is air, and perform exhaust. If the circulating water volume is too small, an open chilled water circulation system can be used.

　　2, the noise is loud when the compressor is running

　　 Check whether the expansion valve is malfunctioning, the temperature bulb is separated from the compressor suction pipe, so that the liquid refrigerant returns to the compressor, if it is damaged, it should be repaired, if the compressor is damaged, it should be replaced.

　　 3. Insufficient cooling capacity

　　Insufficient refrigeration capacity may be caused by insufficient refrigerant and low evaporation temperature; poor cooling effect of pipes; poor heat dissipation of unit condenser; excessive resistance of water circulation system, etc. When repairing okmarts.com, check the refrigerant pipeline for leaks, make up the refrigerant after repairing, repair the cold insulation layer, clean the condenser to check whether the fan is running normally; clean the pipeline filter to make the system circulation smooth.

　　4, the compressor suction pipe is frosted

　　 It may be that the system is not emptied well or the flow of chilled water is too large, the flow of system pipes is too small, etc. The pipeline should be cleared to release air.

　　5, the condensing pressure is too high

　　 When the refrigerant is too much; the outside air temperature is too high to make the unit ventilated; when there is air or non-condensable gas in the refrigerant system, it will cause the condensation pressure to be too high. The okmarts.com chiller maintenance method is to discharge excess refrigerant; adjust and improve the ventilation environment around the unit (such as setting up a sun shed, etc.); open the exhaust mesh to exhaust.

　　6, the condensing pressure is too low

　　 It is possible that the refrigerant is insufficient or the compressor is damaged. When handling, check for leaks, make up the refrigerant after repairing, check the compressor, and replace if damaged.

　　7, the suction pressure is too high

　　 Too much refrigerant and excessive heat load. Improper adjustment of the expansion valve may cause excessive suction pressure. The maintenance method of Chongqing chiller is to discharge excess refrigerant, reduce the amount of chilled water, reduce the heat load, and readjust the opening of the expansion valve.

　　 8. The suction pressure is too low

　　 may be insufficient refrigerant; expansion valve opening is too small; equipment pipeline blockage in the water system and other reasons, you can check for leaks, make up the refrigerant after repair, adjust or replace the expansion valve.