Performed maintenance/ walk through of a Trane 5 ton 20 SEER communicating system. I found a lot of air leakage and the entire indoor unit was condensating. The primary was also clogged and there was about a gallon of water in the drain pan. There are collars on the supply plenum that aren’t in the plenum all the way and also collars that aren’t insulated causing a lot of dripping on the customers ceiling. A lot of air leakage. No drip leg on the gas. Unit isn’t wired correctly. Customer says it drops communication often. Drain pan isn’t level or covering the entire coil. Informed the customer that we are coming back tomorrow 8/14 to take care of these issues. System is cooling properly.