Ultraviolet dye visual inspection and or electronic sniffer detection 4 indoor head units and one wall mounted outdoor unit Fully disassemble four indoor head units for air coil and manifold electronic and UltraViolet dye inspections. Ultraviolet dye is not detectable on any of the units or the outside equipment. *Electronic infrared detection on the other hand is located a microscopic gas leak that is not detectable by ultraviolet dye or micro leak gel in the center portion of the indoor evaporator air coil on the second floor unit East side closest to the master bed. (SN: 2001216) Running refrigerant pressure testing today shows a very slow rate of leakage with very good refrigerant pressures under today's conditions maintaining a 120 PSI suction with 3°sh while all four indoor units were operating in emergency override cooling mode. System does not need any additional refrigerant at this time but does need an indoor evaporator air coil replacement if available Seth will conta