One of the shortest ways to judge the state of the air conditioning system by judging the state of the air conditioning system through the liquid window is to observe the liquid window, so as to know whether the refrigerant quantity is appropriate and whether the refrigeration system has entered air or the like. If there is a bubble or foam in the liquid window, the evaporator surface is frosted, indicating that the refrigerant is insufficient.
After the air-conditioning system is started, the condenser is watered. If no air bubbles appear in the liquid window, the refrigerant is too much. If the liquid window is clear and the air outlet is cold, the refrigerant is insufficient. If the liquid window is filled with oil spots, the refrigerant leaks out. If the inside of the liquid window is dirty, it means that there is too much lubricant in the refrigerant.
When the compressor is running, if no small bubbles are seen in the liquid window, no air is drawn in the refrigeration system. The following two conditions indicate the appropriate amount of refrigerant. At the start of the air conditioning system, there is a flow of air bubbles in the liquid window, and the bubbles disappear after a moment. When the speed is increased or the speed is reduced, bubbles appear again; when the air conditioning system is turned off, bubbles immediately appear in the liquid window, and then disappear.
Air-conditioning compressor maintenance essentials (1) In the summer, the car should be parked indoors as much as possible or in a cool place, so that the body is not exposed to the sun, so as not to increase the load on the compressor. (2) When it is only necessary to change the air and not need the air-conditioning (such as spring and autumn), just start the blower instead of starting the compressor. (3) Do not turn on the air-conditioning system immediately after it is turned off. This makes it very harmful to use the car air-conditioner because the pressure of the high-pressure end and the low-pressure end of the air-conditioning system does not have time to balance. If the air conditioner is started, the compressor is The load is large, and the electromagnetic clutch easily slips when the compressor is started. If this is often done, it may cause the compressor's electromagnetic clutch to burn out.
If there is a breakdown of the air-conditioning compressor electromagnetic clutch protection diode breakdown, before replacing the diode, you should check whether the voltage of the charging system is too high, whether the whole vehicle ground iron is bad, so as to avoid repeated damage to the diode, because the grass does not remove the root, when Will be born again. If the air conditioning system only refrigerates when the engine is running at a high speed, first check the degree of tension of the compressor drive tape. 98N force can be used to press the middle of the tape. If the maximum drop of the new tape is 810mm, the maximum drop of the old tape is 1112mm (or it is appropriate to turn the tape 90 by hand), otherwise it should be adjusted through the tensioner. If you find cracks in the compressor belt or excessive wear, you should replace it with a car air conditioning tape. The newly replaced compressor tape will stretch after 3648h, so it should be checked or tensioned again.
Disassembly and disassembly and maintenance of air conditioning system Disassembly precautions When disassembling a fully automatic air conditioning system, attention should be paid to the following issues: If you need to cut off the battery power, you should first check the password of the electronic anti-theft system (including the sound system), if necessary Record the anti-theft password. In order to prevent the refrigerant from damaging the appearance of the vehicle body, it is necessary to protect the surface coating of the vehicle body. Protect the mating surface of each pipe interface to prevent it from scratching or deforming. Open the pipe connection to wear a protective cap, or use a clean plastic film for dressing and binding to prevent foreign matter and moisture into the air conditioning system.
All the O-rings of the pipe connections must be replaced after disassembling to ensure that the air-conditioning system has a good seal.
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