Fixing a leaking central air conditioner unit - Water is coming out of the unit in my drop-ceiling from the box that holds the condenser coils how do I fix this?

1st you would need to locate the leak. This is normally done by a trained tech by adding a leak detection dye into system then a UV light is used to find the leak. If the leak is in the copper line set then it can be repaired. If the leak is in the evaporator or condensing coils the coil would need to be replaced.