Xantrex AC to DC #XADC-60 Converter Issue!

[dad4papa2]

1996 Damon Intruder, 460 Engine-ford Chassis -34.5 ft

My Converter fan seems to have started running all the time and won't shut off. It was installed 5/12/09.
What I have found up to now.
When I plug into shore power it comes on and puts 14.26 volt to the batteries. It seems to continue at 14.26 volts while plugged in.
When I unplug the shore power and leave the house batteries connected it will slowly drain the batteries down until they are dead.
Now I have plugged back in to shore power and the batteries start charging again at around 14.26 v.
Now as a test I unplug the shore power and remove the positive and negative battery cable and the batteries will drop to around 12.7v and stay there.
I think this is indicating a short somewhere but not sure.
Where do I start with this project of getting it going again???
Thanks so much in advance for any help. Dennis

[dad4papa2]

Thanks everyone for your input. I will pull batteries and have them tested.
If the batteries are bad I will replace them both. If they test good I will go through the whole process from start to finish and post results.

Thanks again for the input.

I did unplug shore power last night at 5 pm and batteries were showing at 12.7v.

Today a 1:00 pm they are still at 12.67.

The only time the fans quits running is when I unhook from shore power.
Thanks much-Batteries will go to shop to be tested.
Thanks Dennis

[opnspaces]

How long does it take the batteries to go dead when you unplug shore power but leave the batteries hooked up?

How long does the battery stay at 12.7 volts when disconnected? Did you wait 4 hours or 4 days?

[time2roll]

To me it sounds like a bad battery. Shorted battery actually.

Converter stays in boost as it cannot really charge fully and see the amps taker off. Then the shorted battery wants to rest at 10 volts due to a lost cell.

Get the batteries out and have them checked. Converter should run normal with no battery.

[CA_Traveler]

Most RVs have draws that cannot be turned off like smoke detectors. How long is "slowly"?

Load check the batteries to determine they are OK. You can pull fuses to isolate the drain. Quicker to use an inline ammeter to isolate circuit draws, but time consuming.

Today one buys, begs, borrows or steals (not really) a clamp on ammeter. It simply clamps on a wire to display the amps. Be sure to use one that measures DC amps.