The basics of air conditioning maintenance, the basics of air conditioning maintenance, the basics of air conditioner maintenance, the general methods of trouble analysis for air conditioners, consisting of refrigeration and electrical systems, are in a state of operation that is closely related to the working environment and conditions, so the problem analysis of air conditioners needs to be considered in a comprehensive manner. The causes of failure can be divided into two categories, either extra-machine causes or human failure (especially whether the power source is normal) or in-house failure. When analysing the failure, the off-board cause should first be eliminated. After removing the off-board factor, in-flight malfunctions can be divided into refrigeration system failures and electrical system failures, which should normally be eliminated first. In the case of electrical system failure, the following can also be found: in this general analysis, we can gradually narrow down the problem, and the cause of the failure is the natural one. 2. When the initial check of the refrigeration system is conducted by air conditioners, the initial check is conducted by means of questioning, touching, looking, listening and checking. These approaches are simple and effective. Touches: 20-30 minutes after the compressor is running, touch the temperature of the straw, the exhaust, the compressor, the evaporating vent, the condenser, etc., and then the cooling effect can be judged by hand. A. Compressors are generally at 90-100°c. B. Touch the surface temperature of the vaporizer. The temperature of the working air conditioner evaporation unit should be the same, and its surface should be cool, usually at about 15 degrees, with condensed water on the outside of the copper pipe. C. The surface temperature of the condenser. When the air conditioner turns on, the condenser will soon warm up, the faster the heat, the faster the cooler, the temperature of the condenser can be around 80 degrees in normal use, and the temperature of the condensor walls is typically 45-55 degrees c. D. Touching low pressure back to surface temperature. Normally, the pipe is cold, the vent heat. Hands should feel cool, if the temperature is low
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