I am working on a Beverage air unit model#UCF48A. when I first turn on the unit, it was running at 5 psi suction and 220 head, after a few minutes the suction pressure went up to 80 back and 350 heading and saw the amp draw went from 6.4 to 11.7 then off on ol. So I replaced the compressor (1/4 hp r404) and the supco bc-1 with 56" long with a new drier last night. Evacuated and weighted in the charge per nameplate info(15 oz) it was cooling down to 35 degrees (with no products in the unit) after 45 minutes with the pressure settle at 20 back and 220 head with 75 deg ambient. The customer call today said it was holding at around 50 degrees. I came and found unit running at 2 back and 180 back. customer put in full of stuff in the freezer last night after I left. I thought there may be a leak. so I leak checked, but didn't find anything. I am wondering would the pressures make that much different with products in the freezer? I added a little more r404 in it, so it is running at 26 back and 270 head and it's cooling down to 26 degrees. but one thing I notice the discharge temperature is pretty hot (177 deg). is it normal to have a discharge line tempt that high? Any comments would be appreciated.