Air Conditioning - Dripping from AC unit, clogged pipe????

Hi all, needing a bit of help before I break something. :D

I have a "pancake" AC unit installed above our master bathroom tub. It was installed by Sears ~5 years ago. Several months ago, I noticed that water began dripping from the quarter sized hole that is cut into the access door (that swings down when you access the unit. Honestly didn't think anything about it (thought it was normal. Needless to say, it is still dripping almost constantly. Here is a pic:http://i25.photobucket.com/albums/c97/jason_tx/IMG_5911.jpg

You can see the metal box that the water is dripping from, as I've marked it. There are two connections at the end. One is capped off, and the other is connected to some PVC pipe. I'm assuming (yes, I know that is dangerous) that that PVC pipe is a drain pipe. I'm guessing that it is clogged??? Is that why this dripping is occuring?:confused: Also, should I be worried about that rust buildup on that metal box?

If what I need to do is check that pipe, should it be leading outside or would it "T" into a sink or other drain pipe in the wall? This is a Fox and Jacobs house built in 1984 in Dallas, Tx.... if that helps at all.

Drain could be run anwhere! Id blow the drain out. Has the coil been cleanned this year? Dirty coil could do the same thing. Id clean it if it has not. By the way cleanning the coils in a fan coil unit is a B!#$*.

No, the coils haven't been touched by anyone in probably 2-3 years. What's involved in cleaning them? like blowing out with compressed air??

All fan coil units are a little different. But most require the removal of the blower section and some of the metal housing. Only true way to clean a coil is to us coil cleaner.