I havn't used my AC system (which used to work) for about 3 years, and am afraid to try it now in case its "dry" and use might damage it.
(I don't know if that's a possibility, since I don't know much about aircon and have never worked on a system, but generally idleness isn't good for machinery)
Are there any non-destructive DIY tests that can be made without specialist equipment, (which is unlikely to be buyable here)?
If not, I'll start asking around for local recommendations on somewhere to take it to.