Arrived at this customers house his system came on, but when I hooked my gauges up, they were very low and it needed refrigerant. I told him that it is a contained system, and the only way that this refrigerant leaks out is if there’s a leak somewhere at this time money is a little tight, so I just got him up and cooling, it took 4 pounds of R 410a refrigerant by the time I left he had a 20° split 59° supply 79° return cleared the drain line removed a bunch of stuff. The system is operating properly at this time.