Service Call Platinum Client Found unit 1 (did mark unit inside cabinet for future reference.) to be completely empty in r410a standing pressures read 60@75 ambient. U it was locked out on low pressure did fill unit up with approximately 5lbs of r410a 133/267 searched for said leak using dr82 no results. Possible that unit could have had refrigerate removed by unknown person(s) did notify landlord of issue he agreed to recharge and see where it goes. Unit possible to have a leak.