If you can I would get on the roof of your trailer and pull the cover off of the A/C unit. I would look for either a plugged drain line or plugged drain hole on the unit. This should drain to the outside and on to the roof. You may want the A/C off as you look at this to insure there is no electrical damage that could occur or that you would get a shock from the A.C unit.
Jim & Jill
2010 318SAB Cougar
2008 Dodge 6.7LCummins the original 6.7L engine, w/68RFE Auto