With the continuous advancement of industrialization, chillers have become widely adopted as energy-efficient cooling solutions across various industries. However, many users report significant declines in cooling performance or even complete failure during operation. Unfortunately, most troubleshooting advice available is incorrect. This guide provides step-by-step instructions to diagnose and resolve chiller issues effectively. Below are systematic fault-tracking methods and solutions:

1. For Newly Installed Chillers

• Verify Cooling Capacity
  Ensure the chiller’s refrigeration output matches the cooling demand. For standard equipment (e.g., injection molding machines, extruders, laser systems), selecting a chiller based on manufacturer or supplier specifications is usually sufficient.

• Special Applications
  For new or hard-to-estimate heat-load processes (e.g., experimental setups), incorporate a safety margin (20–30% extra capacity) to account for variables.

• Operational Faults

• Check high/low pressure values, chilled water flow, and electrical components.

• If the chiller triggers an alarm, resolve it using the error code (refer to the manual).

• Environmental Factors

• Air-cooled chillers: Ensure adequate spacing from walls/obstructions and avoid high ambient temperatures.

• Water-cooled chillers: Confirm cooling tower efficiency and water quality.

2. For Used Chillers

• Chilled Water Circuit

• Inspect valves to ensure full opening and sufficient flow.

• For open-loop systems, clean or replace clogged filters regularly.

• Refrigerant System

• Monitor pressure gauges: Abnormal low/high values may indicate leaks or overcharging.

• Locate leaks, repair (e.g., welding), and recharge refrigerant to specified levels.

• Heat Exchanger Maintenance

• Shell-and-tube condensers (low-temperature chillers): Descale and clean annually.

• Air-cooled condensers: Remove dust/debris from fins to restore airflow.

• Evaporators: Closed-loop systems rarely require cleaning unless severely fouled.