I fired up the 10 ton carrier unit Ive been working on. the problem is it is a split condensor 5T and 5T identical line sets to the coil one side is running fine, but the other has high head pressure with low suction pressure. this unit is 1yr old. and I did as always install new filters and sight glasses. I also cleaned the condensor as I always do before starting the unit. what else am I missing?