I have had several heat pumps on rv's and never had one with a lube point. I have had the one on our Redwood off and didn't notice any maintenance item except to clean it. The book doesn't list anything. In other words I am saying there is no lubrication place, all the bearings a sealed. I think you need to have it checked out by an a/c technicion.
Roger & Cheryl Full Time since 2002, RVing since 1975 2008 Chevy 3500 Crew Cab Dually, 2012 RW 36RL