Not ONLY the above, but most modern units depend on the pan to be used to cool the outer heat coils.....but the theory is not worth shit, there is always more condensate than the unit can blow off over the hot outside coils....
it's an EPA crap thing.....what you have to do is angle the thing so the water/pan tilts outside and drips out there, then to take a drill or cutter and put some slots/holes in the pan along the outer drip edge...for the water to drop out......but be VERY CAREFUL you DO NOT HIT THOSE CONDENSER COILS or you got another unit to buy.....