Solutions to common system problems of air-cooled chillers

Solutions to common system problems of air-cooled chillers

Generally, after companies have used air-cooled chillers for a long time, they are prone to various failures due to lack of necessary maintenance and maintenance. Faced with the occurrence of failures, companies need to conduct detailed inspections of the operating conditions of various components of the equipment in time. For refrigeration systems, electrical systems, wind systems, and water systems, they need to conduct key inspections to determine whether their operations are normal. Next, I will show you how to deal with common system problems.

1. Refrigeration system: Check whether there are cracks, damage, frosting and condensation in each pipeline in the refrigeration system of the air-cooled chiller; whether there are any problems between the refrigeration pipelines, pipelines and shells of the air-cooled chiller. No friction and friction, especially in the welding place of the refrigerant pipeline, whether there is leakage at the joint of the air-cooled chiller, if there will be oil in the leakage place, you can also use a clean soft cloth or soft paper to scrub the pipeline welding place and the joint At the connection point, investigate whether there is oil pollution to determine whether there is leakage.　

　　2. Electrical system: Check whether the fuse of the electrical system of the air-cooled chiller is blown, whether the insulation of the electrical wire is intact, whether the circuit board is cracked, whether the connection is loose, etc. Especially if the electrical connection is excellent in touch, the wiring screws and connectors are easy to loose and cause poor touch.

3. Ventilation system: check whether the air filter, heat exchanger coil and fins of the air-cooled chiller are too dusty; whether the air inlet and outlet are dredged; whether the fan and fan blades work normally; Is the size normal? Is the water system normal?

　　4. Water system: check whether the water system of the air-cooled chiller is leaking; whether the water inlet and outlet are dredged; whether the water pump works normally. Listen to the power on and listen to the air-cooled chiller compressor working sound is normal, whether there is abnormal sound, whether the electric fan, water pump is noisy, whether the noise is too loud, etc. When the air-cooled chiller is working, the vibration is slight and the noise is small under normal conditions.

　　 In addition to the above testing of various systems, touching the relevant parts of the air-cooled chiller to feel the conditions such as cold and heat, vibration, etc., is also helpful to judge the nature and location of the fault. Under normal conditions, the temperature of the condenser gradually decreases from top to bottom, and the temperature of the lower part is slightly higher than the ambient temperature. If all the condensers are not hot or the upper part is slightly warm, or although the temperature is hot but there is a significant difference in the temperature of the two adjacent pipes, it is abnormal. The evaporator will feel cold and sticky if you put a finger dipped in water on the surface of the evaporator under normal conditions. The capillary tube at the dryer and outlet should have a warm feeling under normal conditions, such as feeling lower than the ambient temperature or dew condensation on the surface, and temperature differences in each section of the capillary tube, etc. are abnormal.