Symptom. A bad CROWN air conditioning and refrigeration effect. I plant a replacement and then pull the compressor. Expansion valve Drying bottle, while also cleaning pull the entire air conditioning system piping.
    Fault diagnosis and exclusion; the current situation is the two bottles of cold water plus two pull plus pull. High pressure is 4.9mpa low pressure of 0.4mpa. Acceleration of high and low pressure does not change. This phenomenon is typical of the compressor failure first check high low-voltage connector. not long ago. a colleague also said that the increase is not into Lengmei Crown 3.0. the result is no core cutting open the top air conditioning system piping does not come out of. of course, the increase is not into Lengmei. view there is no problem fitting but to carefully check the concept slowly analysis, high pressure low pressure high end inspection hole there are a lot of bubbles. shows a serious lack of refrigerant, and yet not into Lengmei plus, watching my fine west of operation of the compressor. it is found near The low pressure pipe of the compressor appears to pull the frost phenomenon, and soon disappeared, I know that the air conditioning system has only one pyrogen and compressor. A cold source and the evaporation box / a sticking point and expansion of cutting, if the pipeline on the local frost often produce pull the throttle, with careful observation of this low-pressure pipe did not reveal any abnormalities. reminder to customers through this again before Liu took root canal, it is not a problem to pull out the tubes so buy a new low-pressure pipe again compressor oil pumping an appropriate amount of the main vacuum Freon, the fault was finally ruled out.