7 RTUs on this roof, 4 were out, I was told it was just one. I knew to start at the Payne because the picture is how I found it when getting on the roof - with the panel removed. I know the employees didn't do it because it was a 30' tall ladder mounted to the wall around the back of the building, nobody knew how to get up there. One of the units also had a bad compressor - didn't take a picture of my meter showing it. Not an ideal way to spend my Saturday.