What Causes High Pressure Alarms in Refrigeration Machines? Causes and Solutions

In our daily use or maintenance of refrigeration machines, high pressure alarms are a common issue. When a refrigeration machine triggers a high pressure alarm, it not only disrupts the normal operation of the equipment but can also affect production or the living environment.

So, what exactly causes a high pressure alarm in refrigeration machines?

A high pressure alarm in a refrigeration machine refers to the situation where the internal high pressure section of the refrigeration system exceeds the normal operating range, triggering the alarm mechanism.

This situation can be caused by various factors, including but not limited to cooling water system failures, excessive refrigerant charge, and poor heat dissipation of the condenser.

Next, we will explore these factors one by one to help you better understand the causes of high pressure alarms in refrigeration machines and provide corresponding solutions.

1. Cooling Water System Failure

The cooling water system is a crucial component of refrigeration machines, responsible for carrying away the heat generated by the machine to maintain its normal operation.

If there is a fault in the cooling water system, such as insufficient water flow, excessively high water temperature, or clogged water pipes, the temperature of the high pressure section of the refrigeration machine will rise, leading to a high pressure alarm.

2. Excessive Refrigerant Charge

Refrigerant is the key substance that enables refrigeration machines to achieve their cooling effect.

However, if too much refrigerant is charged, it will cause an increase in the evaporator pressure, leading to a high pressure alarm. Therefore, when charging refrigerant, it is essential to strictly follow the user manual of the refrigeration machine to ensure that the refrigerant charge is appropriate.

3. Poor Heat Dissipation of the Condenser

The condenser in a refrigeration machine is responsible for transforming the refrigerant from gas to liquid.

If the condenser's heat dissipation performance is poor, such as when the condenser surface is covered with dust, the condenser fan malfunctions, or the surrounding ambient temperature is too high, the heat dissipation will decrease. This will cause the high pressure section of the refrigeration machine to overheat and trigger a high pressure alarm.

4. Other Possible Factors

In addition to the three common causes mentioned above, high pressure alarms in refrigeration machines may also be triggered by other factors, such as control system failures, sensor malfunctions, or unstable power supply. These factors can all affect the normal operation of the refrigeration machine and lead to a high pressure alarm.

When faced with a high pressure alarm in a refrigeration machine, we should first identify the specific cause of the alarm and then take appropriate measures to resolve it. Whether it's checking the cooling water system, adjusting the refrigerant charge, or cleaning the dust off the condenser, careful operation is required to restore the refrigeration machine to normal functioning. Additionally, regular maintenance of the refrigeration machine should be performed to reduce the possibility of faults and extend the machine’s lifespan.