The reason why the chiller is not cooling and there is no alarm prompt

The reason why the chiller is not cooling and there is no alarm prompt

In the process of operation, often when there is no cooling phenomenon, there is no alarm prompt, so that the operator has no way to start and does not know what caused this problem. Based on many years of experience of the chiller manufacturer, the reasons for the chiller not cooling and no alarm are summarized as follows. We hope to help the majority of users, solve the problem as soon as possible, and restore the daily use of the chiller.

　　 1. The refrigerant R22 is not enough, which is what we often call Freon. During the operation of the chiller, the liquid refrigerant in the evaporator continuously absorbs heat from the water and begins to evaporate. After the compressor is compressed and the expansion valve is throttled, it becomes a low-temperature and low-pressure refrigerant and enters the evaporator to continue. cycle. If used for too long, the refrigerant will volatilize, which will affect the cooling effect. Another reason is that the refrigerant leaks, which does not affect the refrigeration enough. Therefore, the chiller operator should observe whether the refrigerant is sufficient. In the case of leakage of refrigerant, it is recommended to contact the manufacturer of the chiller to arrange for personnel to check the leakage and supplement enough refrigerant.

　　2. The condenser has not been cleaned for a long time. The condenser is one of the main components of the chiller. Most of the cooling water contains calcium, magnesium ions and acid carbonate. When cooling water flows over the metal surface, carbonates are formed. In addition, the oxygen dissolved in the cooling water can cause metal corrosion and form rust. Due to the generation of rust and scale, the heat exchange effect of the condenser is reduced. When the scale is serious, the tube will be blocked and the heat exchange effect will be lost, thereby affecting the cooling effect. Therefore, it is recommended that the condenser be cleaned every six months.

　　 3. The filter drier is clogged. When the filter is clogged, it will affect the heat exchange effect of the condenser, and the cooling effect of the whole machine is not good. Therefore, it is necessary to check and clean the filter regularly. If the clogging is serious, it is recommended to replace a new filter drier.

　　4. Too many impurities in the tap water adhere to the inner wall of the water pipe, resulting in insufficient water supply, thereby affecting the cooling effect. Therefore, for areas with poor water quality, it is recommended to do water treatment projects or regularly clean and replace water pipes to ensure the normal operation of the chiller.

　　 In addition, the selection of chillers must be accurate. If the model is not in place, the required cooling effect will also not be achieved.

Refrigeration equipment experts suggest that when purchasing a chiller, users should provide the required cooling capacity and other parameters to the chiller manufacturer, discuss and derive the chiller model, determine the chiller installation plan, and achieve the predetermined cooling effect and improve The purpose of production efficiency.