NO - as air conditioning systems use fluorinated gases as refrigerants, all work on them must be done by professionals holding valid F-Gas certification. There is a range of different qualifications and certifications that apply for this, so it's always best to ask someone who is qualified to do this.
Dunbeath
Dunbeath is a village in south-east Caithness, Scotland on the A9 road. It was the native home of Neil M. Gunn (1891-1973), author of The Silver Darlings, Highland River etc., many of whose books are embeded in Dunbeath and its Strath. Dunbeath has an extremely abundant archaeological landscape, the website of numerous Iron Age brochs and also a very early middle ages monastic site (see Alex Morrison's historical survey, "Dunbeath: A Cultural Landscape".) Of Dunbeath's landscape, Gunn composed: "These little straths, like the Strath of Dunbeath, have this intimate beauty. In boyhood we learn more about every square yard of it. We incorporate it physically as well as our memories hold it. Birches, hazel trees for nutting, swimming pools with trout and also a sometimes noticeable salmon, river-flats with the wind on the bracken and disappearing rabbit scuts, a wide range of wild flower and also little bird life, the rising hawk, the unforeseen roe, the ancient graveyard, thoughts of the folk that once lived much inland in straths as well as hollows, the past and also the here and now held in a moment of day-dream." ('My Little Bit Of Britain', 1941.). There is an area museum/landscape analysis centre at the old village college.