Anything's "possible" but most of us replace the entire unit if there's trouble in the "sealed system" of Compressor, Evaporator, and in your case Condenser Coils.
I think the only way it could be cost effective would be if you had your own source for refrigerant and parts, and DIY or free labor. At retail for repairs, a whole new machine is probably less expensive.
These units use a capillary expansion tube, easily clogged. So you should add an inline filter/drier ahead of it. Also, the level of charge (amount of refrigerant) is critical. It holds a small amount and won't work efficiently very far above or below that level.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB