The Fleetwood RV documents are general manuals for the whole coach, not specifically for A/C.
Cuchulainn, if your unit is similar to mine, it came from RV Products, but the manufacturer is/was Airxcel or Coleman-Mach. This page shows where to find the model & serial #s.
Coleman Mach - Model Number Changes | Airxcel
You can use those to find the associated documentation. Or at least I think so. The docs I received when I bought my 2006 last year don't seem to describe the unit I have, so I need to take a look at mine as well.