If the A/C components can be isolated (valved off), you or someone with some mechanical experience can do it. That said, liquid refrigerant is very dangerous and will freeze what ever it comes in contact with instantly, usually fingers, sometimes eyeballs. If you or your mechanic have doubts, get an experienced AC&R technician to isolate the high and low pressure sides of the system, remove and re-install them.
Head Brewer and everything else
North Jetty Brewing Co. (In My Barn)