The maintenance of central air conditioning chillers is a comprehensive process involving the inspection, diagnosis, and repair of multiple systems and components. Below are some key points and recommendations regarding the maintenance of central air conditioning chillers:

I. Fault Diagnosis

1. Power and Electrical System:

   • Check if the power supply is stable and whether the three-phase power supply is missing any phase.
   • Check if the power indicator light is on. If not, it may be due to a missing or damaged fuse, which needs to be installed or replaced.
   • Check for any abnormalities in the electrical control components, such as whether the circuit boards and relays are functioning properly.

2. Refrigeration System:

   • Check the operating status of the compressor, including whether the coils are open or short-circuited and if the overload protector has tripped automatically.
   • Check if the refrigerant is sufficient and if there are any leaks. Insufficient refrigerant or leaks can lead to poor cooling performance.
   • Check if the condenser and evaporator are clean, as accumulated dirt can affect heat exchange efficiency.

3. Water Circulation System:

   • Check if the water pump is working properly and if there are any leaks or signs of wear.
   • Check if the water filter is clogged. Regular cleaning is necessary to ensure smooth water flow.
   • Check if the cooling tower and water tank are clean, as long-term accumulation of dust and dirt can affect cooling efficiency.

4. Temperature Control System:

   • Check if the temperature control display is functioning properly. If the temperature reading fluctuates, it may indicate a damaged temperature controller or poor contact in the temperature sensor.
   • Check if the water in the circulation tank is frozen, which may be due to a temperature setting that is too low or a malfunctioning temperature controller.

II. Maintenance Steps

1. Cut Off Power: Before performing any maintenance work, be sure to cut off the power supply to ensure safety.

2. Troubleshooting: Based on the results of the fault diagnosis, systematically troubleshoot to identify the specific cause.

3. Repair or Replacement: Depending on the cause of the fault, take appropriate repair measures or replace damaged components, such as fuses, circuit boards, compressors, water pumps, etc.

4. System Testing: After repairs are completed, conduct system tests to ensure the chiller resumes normal operation. Testing includes cooling performance, water circulation, and electrical control functionality.

5. Recording and Summary: During the maintenance process, detailed records should be kept of fault phenomena, maintenance steps, and replaced components for future reference and summarization.

III. Routine Maintenance

To extend the service life of central air conditioning chillers and reduce the occurrence of faults, routine maintenance should be performed regularly. Routine maintenance includes:

• Cleaning the water filter to ensure smooth water flow.
• Checking the power wiring and electrical control components for normal operation.
• Checking the oil pressure and oil level of the compressor's refrigerant oil and replacing it if necessary.
• Checking the refrigeration system for leaks and replenishing the refrigerant in a timely manner.
• Cleaning the condenser and evaporator to keep them clean.
• Checking the water pump and water circulation pipes for proper operation and any signs of leakage.

Through the above measures, the normal operation and efficient cooling performance of central air conditioning chillers can be ensured.

Hangzhou Kairui Electromechanical provides services nationwide, including Hangzhou, Suzhou, Shanghai, Nanjing, Beijing, Hefei, Fuzhou, Guangzhou, Shenzhen, Nanning, Guilin, Kunming, Changsha, Chongqing, Chengdu, Wuhan, Zhengzhou, Taiyuan, Xi'an, Dalian, Shenyang, Harbin, Hohhot, Lanzhou, Xining, Urumqi, Lhasa, and more.

We have branch offices in provinces such as Fujian and Zhejiang, providing year-round on-site maintenance and servicing services nationwide.