Upon my arrival I found that the system was very dirty on the outdoor coil, one of the Schrader caps did not have a gasket causing refrigerant to leak out, 2 of the Schrader ports did not have a cap, the system had a slight leak on the Supply air duct and the drain line was not equipped with a ptrap. I spoke with the customer about my recommendations to perform a cleaning on the system and he approved the repairs while on site performed a chemical cleaning, then ran a performance and safety testing on the system finding that the pressures are within manufacture specifications at this time.