Automotive air conditioning electromagnetic clutch burned and fault repair methods
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Author:zhongtaicn
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Published time: 2014-04-07
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Automotive air conditioning electromagnetic clutch burning failure analysis and troubleshooting:
Air conditioning electromagnetic clutch coil is burned, in addition to quality problems, the main air conditioning system is too high pressure, driving the compressor resistance is too large, more than the electromagnetic coil electromagnetic suction, so that the clutch primary and secondary friction plate relative sliding friction, resulting in Overheated and burned.
Usually in the following three cases should not be allowed to use air conditioners.
① parking, the engine idling operation, it is best not to open air conditioning.
② tank cooling fan failure to stop running, you should immediately stop using air conditioning, or refrigeration system will produce high pressure, the electromagnetic clutch slipping and burned.
③liquid refrigerant added than the provisions of the timely release, or are not allowed to use air conditioning. How to check the refrigerant liquid is: When the compressor starts to work, look at the tank observation window with or without bubbles, if there is no bubbles, indicating that the refrigerant is too much, should be appropriate to release, if the bubble too much, indicating that the liquid refrigerant too Less, should be appropriate to add refrigerant.
Air conditioning system pressure is too high for 3 reasons:
① Freon added to the refrigeration system excess.
② When the tank cooling fan fails, but also for a long time, high-intensity use of air conditioning (tank cooling fan is shared with the air conditioning condenser fan);
③ parking engine idling, and a long time in the sun exposure using air conditioning;
At the beginning of the compressor work, pay attention to look at the observation window of the storage tank and found that there was no bubble in the observation window. Then the high and low pressure gauge access refrigeration system, check the pressure and found that the high-pressure side and low pressure side pressure are deviated. Obviously, the refrigerant is overfilled. After removing the appropriate amount of refrigerant from the low pressure side (high pressure side pressure 12-18MPa, low pressure side pressure 0.15-0.30MPa is appropriate), the fault is ruled out.
