1. recover refrigerant
whether it is winter or summer, the refrigerant in the air conditioner must be collected into the outdoor unit. before dismantling the machine, start the air conditioner and set the refrigeration state with the remote controller. after the compressor operates normally, unscrew the protective cap on the interface between the liquid pipe and the gas pipe with a wrench, close the stop valve of the high-pressure pipe (fine), condensation on the surface of the pipe after 1 minute (the larger air conditioner will wait about 2 minutes), and immediately close the stop valve of the low-pressure pipe (coarse), shut down quickly, unplug the power plug and tighten the safety cap with a wrench. so far, the refrigerant recovery work is completed. (if it is winter, cover the temperature sensor probe of the indoor unit with a warm towel first, and then control the cold state setting to start up.)
2. remove the indoor unit
after the refrigerant is recovered, the indoor unit can be disassembled. unscrew the connecting lock nut of the indoor unit with a wrench, and screw it with the prepared sealing sodium to protect the silk pattern of the connecting joint of the indoor unit, so as to prevent the silk pattern of the joint from being damaged during handling; then remove the control wire with a cross lift. at the same time, marks shall be made to avoid wrong connection during installation. if the signal line or power line is connected incorrectly, the external machine will not operate or the machine will not be controlled.
the hanging plate of the internal machine is generally fixed firmly and difficult to remove; after unloading, remove the hanging plate, place it on the flat cement floor, and then gently pat it flat and correct it.