How to Read the Gauge on an Air Conditioning Refrigerant Pressure Meter?
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Depending on the ambient temperature, the low pressure during normal operation of the refrigeration system generally ranges between 3 to 6 bar, while the high pressure ranges between 10 to 25 bar. Below is an introduction to the air conditioning refrigerant pressure meter: Why Add Freon to Air Conditioners: Freon serves as the medium for heat transfer in the air conditioning refrigeration system. Without it, heat cannot be effectively exchanged, and the air conditioner cannot cool or heat. Therefore, if the air conditioner lacks Freon, symptoms may include poor cooling (or heating), failure to cool (or heat), protective shutdown, water leakage from the indoor unit (sometimes spraying water), and ice formation on the indoor evaporator. There are also less visible issues—reduced lifespan of the air conditioner, wasted electricity, and damage to the air conditioner's compressor. Hence, sufficient Freon is essential for normal air conditioner operation. How Much Freon Should Be Added to an Air Conditioner: During hot summer weather (when the ambient temperature is above 32°C), the pressure gauge needle should stabilize at 0.45 MPa. In spring and autumn, it should be around 0.3 MPa. In winter, adding Freon does not strictly follow the pressure gauge reading (the reference pressure is 1.8 MPa). Instead, it relies on the technician's experience or observing the swing amplitude of the pressure gauge needle.
