Is there a safe DIY for complete removal of a split-system central air?

Close the liquid line servica valve ( the smaller sized line). Push in the compressor contactor and hold for a few minutes, then release. Touch the suction line schrader valve with a small screwdriver. If there is still pressure in the system operate compressor for a few more minutes and recheck. When no more pressure exists or a vacuum is noted, all refrigerant has been pumped into the outdoor unit and is safe to cut lines and remove components inside the home. Remember to close the suction side service valve also as if the compressor has leaky valves, the refrigerant will leak out of it. lc