a/c is dripping water
The condensate drain pipes are probably dry because there is a clog, which is allowing the drain pan to overflow.
If you have a wet/dry vacuum cleaner you can hold the end of the vacuum hose tightly around the end of the condensate drain line and see if you are able to suck the clog out.
If that doesn't work you may have to get to the drain pan and see if you can clear it from the inside the unit.
"The physician can bury his mistakes, but the architect can only advise his clients to plant vines." -- Frank Lloyd Wright