I just purchased a Choice Vend CVC-142 myself. It wasn't cooling and I determined that it was low on freon. The compressor was trying but just not enough juice to compress. I found a gentleman locally on Craig's List that had 2 14oz cans of R-12 so I bought those ($50 for both) and grabbed my AC hose kit that I used many many years ago. Luckily the rubber was still good on the can seal and the connection seal. Anyway, with the machine off, I hooked the can up to it and opened it up until it felt like the can was a little more than half full and cut off the valve. If I'm not mistaken, these machines require 7oz and since it had some pressure already, I guesstimated on adding 6oz.
Plugged it in and now she cools! We'll see how long it last... ie how bad the leak was. It was sitting for a while before I got her. I'm hoping for a miracle here and the leak 'self heals'. LOL I just need her to get through this weekend.
Anyway, I'm really disappointed that there are no manuals on this machine. I have a wiring diagram taped inside my door... I'll try to get a camera in there soon and take a photo of it and post it here. How the heck does the loading of this machine work anyway? It has 6 slots and 4 selections. Obviously two slots are shared, but which two? On the shared slots, does one vend till empty and then the other vends or do they alternate?
Oh... in case anyone's interested, this machine is going into 'The Game Preserve' which is a membership driven Arcade/Pinball facility in Houston that me and a few other collectors have started. Currently we have 51 coin operated games and machines and our Grand Opening is Saturday, thus my hope the coke machine cools through the weekend! Search out The Game Preserve on Facebook for more info!