When the ambient temperature is about 35 degrees Celsius, 1, low pressure 0.45MP2, high pressure 2.5MP or more 3, static pressure 1.1-1.2MP This is a normal situation, generally occurs in the use of three to four years old air conditioning. The air conditioning is not completely cool, but the cooling effect is reduced. This is because old-fashioned air conditioners use Freon as a refrigerant, which will evaporate after prolonged use. Therefore, users only need to add a point to the regular air conditioning maintenance point. In addition, it does not rule out the improper installation of Freon and the machine itself.
The second reason for air conditioning not cooling: The power supply voltage is not enough
The normal starting voltage of the air conditioner is 220V+-10%. In China's phase voltage 220V, line voltage in the 380V power supply system, almost all compressors above 200V can start. Above 180V, 70-80% can be started. Above 160V, only individual can start. I personally experimented. Below 160V it is almost impossible to start. According to experience, the compressor starting voltage is more reliable when it is above 190V.
The third reason for air conditioning not cooling: insufficient air conditioning power
The general selection principles are: 150-250 W/m2 for refrigeration and 250-350 W/m2 for heating. In addition, factors such as space height, level orientation, sealing performance, and resident population need to be considered comprehensively.