Arrived at customers home for system inspection on two units. On arrival customer showed me upstairs 2 unit in closet. Check Delta T and delta T was not a satisfactory range. Evaporator coil was clean. Change filter for customer. Blower motor and electric cabinet were clean. All electric connections were secure. Nets went outside to condenser and hooked up gauges. Pressures and readings for showing signs of low freon. Show this to customer and customer acknowledged. Suggested we get Freon put in customer agreed. Put in about 2 pounds of freon until pressures and readings were looking correct. Contactor with sending proper voltage. Capacitor was within acceptable range. Next to check the downstairs unit. Turn down unit in delta T was an acceptable range. Evaporator coil was relatively put in. Blower motor and electric cabinet where relatively clean. All electrical connections were secured. Next route to unit and hooked up gauges. Pressures and readings were showing acceptable range. Pro