Arrived on site to check out the second floor system for no cooling, I installed all of my probes and performed a measure quick scan of the system. The condensers are improperly installed, they are located underneath the deck and the second floor unit is sandwich between the first floor condenser and a solid fence next to it. My outdoor air temperature is currently 88° and my air entering my condenser is at 98° because of the recirculation of condenser exhaust air. This is greatly affecting performance especially as the temperature gets hotter outside, the machine is running a very low superheat which is a sign of an overcharge. My suction pressure was very high however my discharge pressure was on the low side.