Has anyone ever heard this term before? Saw a store today with 3 racks, LL on receivers were at about 30-50%, SC about 4-6 degrees, and the sight glass was flashing. Other service guy said something like "that's been happening for years, they're rivering." And I was like "oh, ok." But I know the sub cooling was there. I can take a vid of it next time I'm at the location....it was absolutely perplexing to me.