How to solve the low-pressure fault during the operation of the chiller?

How to solve the low-pressure fault during the operation of the chiller? The chiller belongs to industrial machinery and equipment. The development of technology has also made the chiller smart. If a chiller fails, there will usually be a fault code. Today Kadely analyzes and solves the low-pressure failure of the chiller. 　　What will the low-pressure failure of the chiller cause? 　　 1. Increased energy consumption 　　 Due to the low-pressure no-load operation of the compressor, the motor load will be reduced. Under the same refrigeration conditions, the chiller with low-pressure failure will waste electrical energy in vain. 　　 2. The cooling capacity becomes smaller 　　Because the suction pressure of the chiller becomes lower, but the return air volume is less, the cooling capacity will not reach the target cooling, affecting the normal use. 　　What are the reasons for the low pressure of the chiller? How to solve it? 　　No.1 refrigerant shortage or leakage Insufficient refrigerant will cause the pressure in the system to be abnormal, resulting in a decrease in suction pressure, low-pressure alarm of the chiller, the equipment will stop running, and the location of refrigerant leakage can be from the compressor, condenser, filter, expansion valve and evaporator, etc. Diagnose at the connection of the fitting pipe, after troubleshooting, fill the appropriate amount of refrigerant, it can be solved. If you do not understand the operation, please contact the chiller manufacturer. 　　No.2 Outside temperature is low 　　 The outside temperature is low, the cooling water is started at low temperature; or the temperature of the freezing oil is too low, the refrigerator cannot be completely separated, and a low-pressure failure will occur. If the cooling water temperature is too low, you can close the cooling tower or throttle cooling water to increase the cooling water temperature. If the temperature of the refrigerating oil is too low, the warm-up time of the chiller can be extended, and the temperature of the refrigerating oil can return to normal. 　　No.3 system pipe blockage 　　 When the chiller is assembled, it is inevitable that impurities will seep into the system. After a long time of use, it will cause various impurities to enter the system. At this time, the filter is blocked, the refrigerant throughput is reduced, the return air volume is reduced, and a low pressure failure occurs. 　　 The solution is to clean the filter, condenser, and evaporator to ensure that the system is not blocked, and the low-pressure fault caused by the system pipeline blockage can be removed. 　　No.4 Expansion valve opening is too small or damaged 　　Expansion valve is the throttling device of the refrigeration system, too small will produce a small amount of refrigeration, and too little refrigeration steam through throttling will cause the compressor inlet pressure to become smaller, resulting in low pressure failure. 　　The solution is to increase the opening of the expansion valve appropriately or replace the damaged expansion valve. 　　No.5 relay failure, electrical system false alarm 　　Relay plays the role of indirect protection equipment. Generally, the normal suction pressure of the compressor is 0.4~0.6MPa. When the suction pressure is lower than 0.2MPa, it will cause the low-voltage protection relay to act, cut off the system circuit, and the equipment stops. Sometimes, the low-voltage relay will malfunction due to moisture, open circuit and other faults, and the system will report low voltage. 　　Solution, check low voltage relay, repair or replace, non-technical personnel can contact the manufacturer to assist in solving. 　　 Normally used chillers report low-pressure faults, generally for the above reasons. According to the system fault phenomenon, step-by-step investigation is helpful to quickly find the cause of the fault and resume normal production as soon as possible. When a low-pressure chiller malfunction occurs, you can contact the chiller manufacturer for assistance.