I have a Danby floor unit but I can't find any info on how to service it. It's not cooling but I'm thinking it just needs coolant - and of course I can't find the manual! I don't know how to do this and have no one locally that services these things (I live in a small town between two big towns - and my present car can't haul a trailer so I have no easy way of getting it to a big town). Any idea where I can get info on how to fix this? Thanks!