Unit was empty upon arrival. Did a visual inspection for oil and loose fittings. Found 1 head leaking at the suction line and most outdoor flare nuts were loose and leaking. Replaced flares with pro-fit connectors. Pressured, and vacuumed. Found no leaks. Total lineset at about 125 feet which is factory spec. Added 10 pound 2 ounces of r410 which is factory charge. Tested operation. All heads (except the living room one waiting on a repair part) are tested and functioning properly.