Causes and solutions for high-pressure alarms of refrigerators

Causes and solutions for high-pressure alarms of refrigerators

Generally, the refrigerator is equipped with a full set of protection devices. When the refrigerator has a high-pressure alarm, it will automatically start the protection device, and the corresponding fault indicator will light up. At this time, the freezing unit will not run, and the operator needs to communicate Check the following methods, or contact the refrigerator manufacturer for guidance.

1. If the water-cooled chiller has a high-pressure alarm, it is mainly related to the cooling water system. The water-cooled chiller provides circulating cooling water through a cooling water tower. If you forget to open the cooling water valve during use, the cooling water cannot be Circulating supply to the chiller will cause a high-pressure failure. In addition, check whether the cooling water tower is faulty and cannot deliver the cooling water safely and stably;

　　2. The cooling water flow is too small, or the temperature is too high and the heat dissipation is not good. This problem will also occur. If the cooling water flow is small, check whether the size of the matched pipeline matches the size of the chiller unit, or whether the water valve is opened to the z* position; if it is an air-cooled chiller, we need to see whether the installation environment temperature exceeds 40℃ If it exceeds, the heat must be exhausted in time to ensure that the refrigeration unit is in an air circulating environment;

3. If the refrigeration unit is used for a long time, it is easy to cause debris such as scale to accumulate in the pipe wall or the copper tube of the condenser, which will inevitably affect the refrigeration cycle system. Therefore, you should regularly maintain and clean the refrigerator according to the maintenance time recommended by the manufacturer Work (cleaning the cooling water system, cleaning the condenser, replacing the filter, etc.);

　　4. Check whether the refrigerant is excessive. The refrigeration unit will be charged with an appropriate amount of refrigerant before leaving the factory. Therefore, if there is no refrigerant leakage, the user does not need to charge the refrigerant. Too much refrigerant will only affect the normal use of the unit.

　　 5. Whether the opening of the expansion valve is too small, at this point, you can slowly adjust the opening of the expansion valve to eliminate the fault.