This is a r22 system with txv. It sub cooling should be 10° and it's currently at 5°. System is low on r22 and is over 10 years old. It will achieve some cooling in this pleasent weather given that the equipment only works for 10 mins at a time. But when summer arrives and it works all day long it will build up in ice on the Evap coil causing problems. I recommend system replacement.