Poor cooling, Found drain restricted setting off ez tee safety switch Flushed out drain line with co2 Run 3 gallons of water through drain Monitor refrigerant levels Low 133 Superheat 5 High 313 Sub cool 13 Calibrated u/s stat off 1.5 degrees Measure temp diff 21'F Drop upstairs temp to 72'F from 77'F Outdoor temp 82'F Indoor temp 72'F Cycled system 3 times operating properly at time