To top off the system for the second floor and install ultraviolet dye performed maintenance on two ac systems checked electrical and mechanical components and tested refrigerant levels topped of second floor ac unit with two lbs of refrigerant checked systems operation left system working, first floor system had to replace the capacitor located in the condenser started system and checked refrigerant levels left system working homeowner is looking into replacing the second floor system next year View visual findings from this job here - https://visionshare.xoi.io/?id=XA-D510-9D9DCF79C260403796736AE366311FFC