Air-cooled chiller inspection steps and solutions

Air-cooled chiller inspection steps and solutions

Generally, after using the air-cooled chiller for a long period of time, some problems cannot be avoided. If there is a failure, we should carefully check the operating conditions of the various parts of the machine. Check the refrigeration system, electrical system, air system, and water system. To determine whether their work is normal, the editor below will analyze the inspection methods in detail with you.

　　First, refrigeration system

Check whether there are cracks, damages, frosting and condensation in each pipeline of the refrigeration system; whether there is friction between the refrigeration pipelines of the air-cooled chiller, and the pipeline and the shell, especially the welding of the refrigerant pipeline Whether there is leakage at the joints and joints, where there will be oil stains, clean soft cloth and soft paper can also be used to scrub the joints and the joints.　

　　Second, electrical system

　　 Check whether the fuse of the electrical system is blown, whether the insulation of the electrical wire is intact, whether the circuit board is cracked, whether the connection is loose, etc. In particular, whether the electrical connection is well-touched, and the wiring screws and connectors are easily loosened to cause poor touch.

　　 Third, ventilation system

Check whether the air filter, heat exchanger coils and fins are too dusty; whether the air inlet and outlet are dredged; whether the fan and fan blades work normally; whether the wind force is normal, whether the water system is normal, etc. .

　　Four, machine water system

　　 Check whether the water system 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 there is noise in the operation of electric fans, water pump, 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.

　　 Touch the relevant parts of the air conditioner with your hands to feel the conditions such as cold and heat, tremor, etc., which helps to distinguish the nature and location of the problem. 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 the 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 difference in each section of the capillary are abnormal. The temperature of the suction pipe 20 cm away from the compressor should be similar to the ambient temperature under normal conditions.

　　In order to accurately determine the nature and location of the problem, it is often necessary to use instruments and appearance to check and measure the performance parameters and conditions of the air-cooled chiller. For example, use a leak detector to check for refrigerant leakage; use a multimeter to measure whether the power supply voltage, the ground current of each terminal and the working current meet the requirements, and the air conditioner controlled by the computer should also measure whether the potential of each control point is normal Wait.