What is the reason for the air conditioning not cooling in the Bisu T5?

[Freddie]

The reasons for the air conditioning not cooling in the Bisu T5: It may be due to insufficient or low refrigerant, or slight leakage of refrigerant. The solution is to add refrigerant, but please note that if adding from the low-pressure side, do not invert the refrigerant bottle, and if adding from the high-pressure side, do not start the engine. The car's air conditioning system consists of multiple metal pipes with small gaps between them, so there is a slight leakage of refrigerant in the system. The Bisu T5 is Bisu's first 7-seat mid-size SUV, featuring extensive use of soft materials in the interior, an 8-inch floating LCD screen integrating Bluetooth and smartphone mirroring functions, a large panoramic sunroof, one-key start, keyless entry, and an electric tailgate, among other comprehensive features.