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Summer, Automotive Air Conditioning Also enter the high incidence of failure. Whether large-scale Auto Repair Factory, or street repair shops, in the summer seasonal conservation repair automobile air conditioning system will be paid special attention fault detection and Service And related equipment and air conditioning maintenance, tools and supplies. To enable professionals to become more familiar with automotive air conditioning repair Market For the repair and maintenance related businesses buy equipment, tools and supplies to provide a useful reference for all-round promotion of automotive air conditioning repair mainstream technology and industry cutting edge technology products for the maintenance personnel have the necessary equipment, tips and troubleshooting methods to make readers a more comprehensive understanding of the automotive air conditioning repair market situation, introduce the “automotive air conditioning repair project.” Related Reading: Rain car maintenance project code  Enjoy special summer featuring a variety of vehicle maintenance all captures Maintenance work after the leak, you need to add the word refrigerant recovery machine into use. Refrigerant recycling machines in the summer as a filling for business profits is one of the most important equipment, its purchase, use, and troubleshooting problems such as professionals, a topic of concern. Similar concern, as well as refrigerant and refrigerant oil, air-conditioning running them as an essential medium used in the grade, quality, note the use of identification and pumping must be attention. In addition, the automotive air conditioning system in the maintenance of the inevitable need to replace certain parts, accessories and the quality is good or bad impact on the operation of air conditioning system is very large, important for the cooling effect is good or bad. The project will address these issues of common concern professionals, specialized analysis of. Air conditioning maintenance profile articles Automobile air conditioning system according to their function can be divided into refrigeration systems, ventilation system, ventilation system, control system, control system and air purification elements 5, each system might be some trouble, sometimes, number of concurrent multi-system integrated fault. Maintenance of air conditioning maintenance personnel on the following issues need attention. 1. Understand the air conditioning system, control method and control circuitOnly familiar with the Car repair Type of structure and working principle, can be successfully troubleshooting. Now many new cars have been commonly used in variable displacement compressor, fixed or electronically controlled throttle, in analyzing the failure of such systems, we must grasp the condition of variable displacement compressor, otherwise it will not be an accurate diagnosis the real cause of failure. For instance, some vehicles, air-conditioning system blowing hot air sometimes, and sometimes chilling by cold phenomenon, appears to regulate air board failure may actually be ahead of variable displacement compressor problems. In addition, emissions often variable displacement compressor refrigerant purity of the same or not when the failure occurred evaporator icing. For the automatic air conditioning, air conditioning electronic control unit (ECU) based on a number Sensor Signal for accurate temperature control system, its structure and control method is more complex maintenance to comprehensive analysis of many factors. Also note that the failure of the system combined with self-diagnostic function for quick and efficient treatment failure. 2. Fully bound by the system requirements and amount of qualified system corresponding to the refrigerant and refrigeration oils For refrigerant charging, repair, there are still errors in maintenance, a lot of people think that no bubble dryer observation window, the system pressure to normal, that is, that refrigerant charging is completed. In fact, there are problems with this operation. As the refrigerant will be with the outside temperature and condenser cooling capacity change, often appear “out of the cooler air cool, the heat air out of hot air”, and correct operation is based on the quantitative use of vehicles full description Note. Refrigerant oil should be required to accurately grade and amount of filling, less will not achieve a lubricant, lubricant will take over the condenser’s capacity, so that the condenser cooling effect due to the pressure is too high and adverse. 3. Good use of manifold pressure gauge on the air-conditioning system basic diagnosticLearn and be good at using the manifold pressure gauge on the air conditioning system diagnostic helpful. Maintenance staff should have two sets of manifold pressure gauge, a set of R134a, a set of R12, the two mixed prohibited. In the ambient temperature is 20, the air conditioning pipe work pressure in the low pressure side is generally 103 ~ 241kPa, high-pressure side of the working pressure is generally 1103 ~ 1517kPa, different environmental temperatures and different air-conditioned cars will be slightly different pipeline pressure. 4. Balance on the cooling conditions of the circulatory system work should take full account of Equilibrium cooling circulatory system work, one is the balance of the evaporator and the condenser, the other is the compressor and the throttle valve (expansion valve) balance. The balance of the evaporator and the condenser, evaporator, absorbing heat that depends on the condenser to the atmosphere to fully distributed, and if the blocked condenser fan heat causes abnormal working poor, will result in liquid refrigerant can not be good, system pressure and temperature will be further increased, making high-pressure system pressure is too high, poor cooling effect. Similarly, if the radiator because the temperature is too high, the long term cycle air conditioning and vehicle Mifengbuyan other causes excessive absorption of heat will cause the condenser cooling capacity less. Therefore, the appropriate enhanced condenser cooling, will contribute to evaporator. Evaporator and condenser to balance the heat between refrigerant circulatory system is the key to work properly. Compressor and the throttle is also a pair of equilibrium relations. When replacing the compressor, the model they should pay particular attention, when the compressor Wear and tear Later, if the piston Mifengbuyan, will result in the displacement compressors decline, the relative amount of throttle will produce liquid transportation imbalances. If the mechanic to adjust throttle opening tune was inappropriate, it will impact on the cooling effect.
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