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.
Heriot
Heriot is a little town in the Moorfoot Hills southeast of Edinburgh, Scotland, within Eildon (part of the Scottish Borders council area, though traditionally in Midlothian). The village makes up some 150 houses, spread over a geographical location of around 50 square miles (130 km2), most of which is moorland. Linked to the rest of the globe mainly via the A7 roadway, Heriot had a train station from 1849 till the branch line closures prompted by Beeching caused the track to be uplifted in the 1960s. The Scottish Parliament voted, in 2006, to reinstate the train, yet without a station at Heriot. The School (since Sept 2016) has 36 pupils. There are numerous neighborhood teams running in the town including dramatization teams, WRI, a neighborhood choir and also a martial arts club. Places close to Heriot include Borthwick, Carcant, Crichton, Fala, Stow of Wedale and Innerleithen.