I know it's been a while since this thread stopped, but here are my observations. We have a Link 2000 and a Freedom 15 I/C.
1. As suggested YOU really need to do a wiring
diagram for your boat.
2. If you don't have the manual for the Link 2000R, go download one, here: Discontinued Power Accessories
3. Learn and understand about Function F11. You need to turn it off to use the house bank to run the Link. Default is ON for a two equal house bank setup.
4. You need to assure yourself that the parameters are set properly. Reset the Link to factory defaults and start all over again. RTFM.
5. Avoiding premature transition to float (yes, I know you don't have this problem, yet, but you will if you don't set it up right): Link-series Charging Algorithms -- The "Gotcha" Factor!
6. Agree: check all the connections. There are tons of them. The ones on the back of the Link are especially prone to failure because of the little tiny wires. I crimped each of those connections to ring terminals. Maybe your PO just tied the wires around the bolt heads. If it's electrical, the first thing to do is check the connections.
7. Be careful about disconnecting anything, and do it in the right order as specified in the manual. RTFM.
8. Avoid the dreaded "I need an electrician" syndrome. Only YOU care enough about YOUR boat to make it work. Unless you can find an electrician who comes highly and personally recommended by someone YOU trust, it's a crapshoot, and you will loose. Figure it out yourself, and come back here and ask. Many of us have this equipment
and know how to use it. I know someone with a Link who just didn't want to listen to me about the "Gotcha Algorithm." Two years later I saw him again and he complained about his flat house bank. He just wouldn't listen.