Our boat, Adventure, has an ancient Danfoss D2 unit. I took pictures of it awhile back and posted them here. Today I troubleshot the major issue, no power. I found that the unit’s ground was wired through a “dead” power supply, the boat’s auxiliary battery charger. I SUSPECT that unit was disconnected at some point when the newer unit which is a charger/inverter system was installed. I KNOW there are some wires going back to the batteries that are no longer connected and MAY go to that charger.
Anyway, because the charger won’t fire up, the ground is removed from the fridge.
So, I pulled the old red (+) wire from the unit, and tied a new cable with both black and red wires, and used the old cable as a fish/messenger wire. Pulled in the new cable, made the connections in the panel, then tied everything in at the compressor.
After I reinstalled the fuse and checked the connections, I fired up the “Refrig” breaker, saw the compressor kick up to a momentary 8 amps, and drop back to 5 amperes.
I listened to the cooling plates and sure as I’m sitting here at my computer, I could hear the thing pushing fluids through the plate. In five minutes the plate started getting cold.
It’s been on for 10 now. The temp inside (and remember we have been putting ice in the unit as an ice box for a couple of weeks now) is around 54 degrees F right now. The plate is developing some frost on it, which it would NOT do with just the ice in there.
That means I can pronounce the patient “healed”.
I do need to replace the thermostat, as it is broken and in some random position. I also need to run this thing to see how cold it gets for a couple of hours.
Update to follow!