I am going to take this chance to warn you about a common issue with RV rooftop A/C units and... A possible cure (This is way cheaper than you will expect too).
There are quite a few threads about folks having water dripping down inside the RV.. Now if this is happening when it rains out and the A/C is not running, odds are the gasket is bad or the mounting bolts need to be re-tightened.
But if it only happens when it is running, Then there are several options.
I have had my unit freeze up on me, when I shut it down NIAGRA FALLS as the ice melted.. Next time I switched it to fan mode, the blower sucked the water to the drip pan side of things and out it went on the roof where it belongs.
Other times it has dripped down inside even though it was working normally.
Turns out I was a bit "Low" in front.. I raised the nose of the RV just a couple o finches and,, Well water runs down hill don't you know, Down was now toward the rear and out onto the roof where it belonged.
A few others have found that to be the case as well. FIRST thing to check is your level, if you are low in the noise, raise the front a bit.. Total cost $0.00, (I did say cheaper than you expect didn't I?).
Home is where I park it!