5. Oh, crap. You just found a difference between these two heat pumps. It's a jumper wire, L2 to H1. My original heat pump had that jumper removed as directed in the lower diagram Fast Recovery Hook-up. I didn't notice it was present in the replacement heat pump. Time to try to decipher my notes from 13 years ago when we wired that switch in. Crystal clear at the time, but that wasn't yesterday.
I'll go pull that switch out. I think there're 8 wires going to it. All I did was label carefully, and make notes where each one went. Wasn't looking forward to trying to figure out what we'd done 13 years ago. It worked great, leave it alone.