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Easy fault diagnosis without diagnostic auto by big tree
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Easy fault diagnosis without diagnostic auto |
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Business,Business News,Business Opportunities
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Not cool air in the customer complaints, but no must-do Diagnostic Device, how the failure of the air conditioning to make a preliminary diagnosis of what? Medical care for patients in the TCM approach is often used when the pulse, in fact, the automotive air-conditioning fault diagnosis can also Automotive Air Conditioning Vein of. Automotive air conditioning pulse was high and low pressure in the air, the normal opening the hood you can see. Related Reading: Special car maintenance code after the rain Enjoy the cool of a summer special summer car maintenance all captures
1. Check the temperature in the high and low pressure pipes to be set prior to air conditioning to maximum cooling, maximum air flow, blowing straight position, the air circulation, A / C switch. Outlet temperature, according to empirical values about 5 ° C around the normal.
2. Support from the hood that electronic fan running while the compressor are running. If not running, then release the high pressure pipe cover of the Lee matter with high-pressure exhaust thimble press gently to see if there is a strong coolant overflow, if the failure is that air-conditioning system in the circuit. Strong to overflow if there is no refrigerant, air conditioning tube carefully view all Connector Whether there is oil, if the proof is there leaks air conditioning system, which Service May be waste of time, it is likely to maintain a 1, then there are other office leak, it is inevitable. Please be owners on the maintenance of adequate understanding of leakage. Finally remember to protect the cover fastened.
3. Hand-to-high-pressure pipes and low pressure pipe, carefully feel their temperature. In the refrigeration system working under normal circumstances, the normal temperature high-pressure pipe about 50 to between 60 ° C, which is firmly clenched hand can live for 30 seconds or so longer and can not hold on. Low-pressure tube temperature of about 5 to 6 ° C between, that is, hand by hand to feel the ice.
Failure phenomenon of the following: A. Hands feel the high and low pressure control air-conditioning temperature fits the normal situation, but feel the car is not cool. Sure there are no problems of cooling air. The problem may lie: the temperature of air conditioning systems. Check Heating switch control pull it off, check whether the heating valve closed position. If you can touch the water valves before and after the normal situation should be close to the engine side of the high temperature, low temperature side near the body. If incorrect, adjust the heating switch to the off state, such as cooling water can not be effectively closed the entry of the replacement of heating switch.
Temperature wind board control system. Adjust the temperature knob feel the temperature is changed, if change control board may pull off the wind, such as the loss is adjusted to re-install.
Feel the air flow outlet is large enough, if the wind is a small amount of evaporator block, to be pulled down to clean the evaporator.
B. Touch the air conditioning pipes, high pressure pipe hot or hot, of course, not cool low-pressure pipe. This case, the compressor may occur frequently off phenomenon. Especially in the case of high speed engine compressor does not pull. Avoid high-speed operation of the engine can not be a long time, otherwise it will be dangerous.
See if between the condenser and the water tank and blocked by dirt. If yes, dirt can be removed.
If indeed no dirt blocking the view refrigerant observation window to see if too much refrigerant. Liquid flow phenomenon is to see, but do not see any bubbles, then prove excessive filling refrigerant, and need to find time to do a standard notation.
Note: For high-pressure tube overheating, but also see whether the bottom of air conditioner compressor oil, if the limit is that the compressor pressure valve has been damaged, need to replace the compressor.
C. Touch the air conditioning pipes, low temperature, high pressure pipes, while the low-pressure pipe and high temperature.
This case, is not effective to make compressors for circulating refrigerant may need to replace the compressor.
D. If you start the air conditioning system, two electronic fan while running. But is the air pump does not smoke is very likely to burn the vehicle computer, and can be repaired. I am a professional writer from China Manufacturers, which contains a great deal of information about bath tubs cast iron , suction grab bars, welcome to visit!
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