The open type directly removes the oil drain bolt, and then quantitatively fills the refrigerant oil according to the model and specification. The closed type is more cumbersome.
Small household air conditioners drain the refrigerant, disassemble the power supply, weld down the high and low pressure pipes with a welding gun, remove the compressor, pour out the old refrigerant oil, and fill in new refrigerant oil according to the regulations. Pay attention to start the compressor to be sucked in by the low pressure pipe, then install the compressor, weld the high and low pressure pipes, and finally empty the air to add refrigerant.
Large air conditioners should receive the refrigerant into the liquid storage tank, close the valve → remove the power supply → remove the compressor → drain the oil → fill in new oil → install and position, vacuum, open the valve, and the snow seed does not need to be changed.