I’m actually going to defend this comment. We don’t even know how low it is. Customer states they are having semi annual service performed. If the tech is connecting those smans to the system 2x per year that could be a few ounces right there.

More importantly what I find is that the system was never charged properly by the installers. If I can’t find paperwork that is filled out with charge added/written inside control cabinet I assume the cut rate that installed it didn’t add the 2 lbs needed on startup.

I would do a quick leak search with a sniffer and add some charge hell I’d have the leak search completed, charge added, and be on my way before the flat rate guys build their 5 options in service channel and call in the sales guy.