The high pressure alarm could be triggered when operating an industrial chiller. The alarm is usually indicating that the condensing pressure of water chiller has exceeded the safety threshold. We will provide a detailed overview of the possible causes of high pressure alarms and the corresponding solutions.

Poor heat dissipation of condenser

• Reason: Excessive accumulation of dust on the surface of the condenser can affect its heat dissipation effect, causing the refrigerant inside the condenser to not be able to condense.Thereby, the increasing condensation pressure triggers the high pressure alarm.
• Solution: Turn off the chiller, use specialized cleaning agents to clean the surface of the condenser and remove dirt and dust.

Insufficient cooling water flow or excessive temperature

• Reason: Insufficient cooling water flow may be caused by pump failure, pipe blockage or valve not fully opened. The excessive cooling water temperature may be related to the ambient temperatureor cooling tower efficiency. These factors can prevent the condenser from dissipating heat effectively, triggering the high pressure alarm.
• Solution:Regularly check the water pump’s operation to ensure it’s running smoothly without unusual noise or vibrations; promptly repair or replace as needed. Clean the cooling water pipeline, remove blockages, and ensure smooth water flow. Adjust the valve opening to ensure that the cooling water flow meets the requirements.

Excess refrigerant

• Reason: If an excessive amount of refrigerant is added, the refrigerant pressure will rise, exceeding the set high pressure limit and triggering a high pressure alarm.
• Solution:Use a professional refrigerant recovery device to discharge the excess refrigerant according to the operating procedures to keep the refrigerant within a reasonable range.

The improperly adjusted of expansion valve

• Reason: The expansion valve is a critical component for controlling refrigerant flow. If the valve opens too wide, excess refrigerant enters the evaporator, preventing timely evaporation and causing inefficiency in the cooling process. As a result, the refrigerant temperature from the evaporator drops too low, reducing the return gas pressure. This puts extra load on the condenser, which can then trigger a high pressure alarm due to the system’s inability to maintain proper cooling balance.
• Solution:Use special tools to adjust the opening of the expansion valve, so that the opening is  

Industrial Chiller Manufacturer

When an industrial chiller encounters a high pressure alarm, it automatically interrupts its operation and leads to downtime. However, we can effectively avoid this situation by implementing preventive measures. Regular maintenance plays a crucial role in ensuring the continuous and smooth operation of industrial chillers. For you existing chiller, we have spare parts. If you are looking for a new chiller, we offer air-cooled chiller and water-cooled chiller. The Wensui industrial chiller is reliable and consistent with precise cooling technology for temperature control. We are a one-stop shop of auxiliary equipment for plastics processing application. Get a free quote today.