Is there any air conditioner installed nearby and fluoride added to the air conditioner?

Absolutely, connect the three-way valve to the low-pressure side of the outdoor unit of the air conditioner, connect the refrigerant tank, and tighten it. Then loosen all the quick connectors, including high-pressure ones, and then rush the refrigerant gas into the system, and the air will be driven out by the refrigerant gas. After a while, turn off the refrigerant gas, tighten all the joints, start the machine, and in the cooling state, remove the refrigerant. Turn the tank upside down, slowly open the refrigerant tank, and pay attention to the low-pressure pressure gauge. Generally, it should be stable at 0.5MPA. At the same time, observe the current situation. It is generally accurate after reaching the rated current.