Water-Cooled Chiller High-Pressure Alarm

A high-pressure alarm in a water-cooled chiller is typically associated with issues in the cooling water system. The following are common causes and corresponding solutions:

1. Cooling Water Valve Not Opened

   The water-cooled chiller relies on a continuous supply of circulating cooling water from the cooling tower. If the cooling water valve remains closed during operation, water circulation to the chiller will be interrupted.

   Solution: Ensure the cooling water valve is fully opened before startup.

2. Insufficient Cooling Water Flow or Elevated Cooling Water Temperature

   Both conditions impair heat dissipation, preventing effective cooling of the refrigerant and leading to increased system pressure.

   Solution: Verify that the piping diameter matches the chiller specifications, confirm normal pump operation, and ensure all valves are fully open.

3. Cooling Tower Failure

   If the cooling tower malfunctions, it cannot supply adequately cooled water to the chiller, resulting in reduced heat rejection and potential high-pressure alarms.

   Solution: Inspect the cooling tower for operational faults and perform necessary repairs or maintenance.

4. Scaling in the System

   Prolonged operation without proper maintenance may lead to scale buildup and debris accumulation on internal pipe walls, significantly reducing condenser heat transfer efficiency.

   Solution: Perform regular descaling and cleaning of the heat exchanger and water circuit to maintain optimal performance.

Note: Routine inspection and preventive maintenance of the entire cooling water system are essential to ensure reliable chiller operation and prevent unexpected downtime due to high-pressure conditions.