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Old 11-10-2014, 09:47 AM   #1
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AUX batteries seem to be off line

Kind of in a pinch. I'm out in my 07 Fleetwood 38L and my AUX batteries aren't registering on the battery test panel. This is a problem as nothing on the coach electrical system owl work. No water pump. No generator. And no control if the refrigerator and ultimately unable to stow the satellite dish.

I checked the voltage at the batteries with a voltmeter and they have plenty if juice.

Any thoughts? Could definitely use a recommendation.

Thanks
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Old 11-10-2014, 10:16 AM   #2
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Did the battery shut off switch get turned off by accident?
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Old 11-10-2014, 10:22 AM   #3
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No, I wish it was that simple. At this point, I've reset all circuit breakers I could find and disconnected/reconnected the house batteries.

When I do so and try to turn the battery switch back on, it indicates that it has power momentarily.
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Old 11-10-2014, 11:05 AM   #4
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Try bypassing the house battery switch with a jumper wire to see if it has failed.

Try bypassing the house battery solenoid also.

Review your electrical schematics to see if there are inline fuses in your battery wiring (mine has two) that have failed.

Fuses are less likely since you get a burst of success when flipping the shutdown switch.
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Old 11-10-2014, 11:12 AM   #5
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I'm not sure where to find the house battery solenoid. Am reading through the manuals right now. I'm starting to believe it is an issue with the xantrex inverter. None of the LED lights on the inverter are illuminated.

The house batteries are reading 12.97 volts at the inverter via my multi meter.

The battery switch in the master panel inside the RV is indicating the AUX battery is on, but the LED light is very dull compared to normal.
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Old 11-10-2014, 12:53 PM   #6
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Try resetting all the circuit breakers on the Inverter. My old one has 3.
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Old 11-10-2014, 01:21 PM   #7
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Yeah, there are two on my inverter. Reset. Called xantrex customer service. Felt like I was talking to Dell customer service. They told me to disconnect the power for two hours and then try again. Sounds like ctrl/alt/del on a PC.
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Old 11-10-2014, 01:29 PM   #8
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Have you tried restarting the engine and holding down the AUX Battery switch to see if you get voltage restored? Worked for me momentarily until I found blown fuses on the converter.
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Old 11-10-2014, 02:25 PM   #9
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On many systems there is a self resetting thermal breaker on the supply to the 12 volt panel, these can fail in that it takes almost nothing to trip them and there is also the possibility that a short has developed between it and the panel.
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Old 11-10-2014, 02:26 PM   #10
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The engine starts just fine, but I'm not seeing any indication of house electronics voltage when I press the aux start button.

Waited the xantrex recommended 2 hours and reconnected the house batteries to the inverter. No luck. The batteries still read nearly 13 volts at the inverter, but will not display voltage on the hard panel inside the RV.

Guess I'll be driving VERY slowly with the satellite dish not stowed.
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Old 11-10-2014, 02:29 PM   #11
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Mentor,

All possibilities although strange that it is intermittent. Everything worked just fine this morning. After breakfast I turned the generator off and that's when I noticed the AUX battery system was not powering the RV.
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Old 11-10-2014, 02:36 PM   #12
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Quote:
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Mentor,

All possibilities although strange that it is intermittent. Everything worked just fine this morning. After breakfast I turned the generator off and that's when I noticed the AUX battery system was not powering the RV.
Could you possibly have a converter problem? Mine has a plug to disconnect it and I will suggest you check and unplug it it then plug back in with the genset both running and shut down to see what happens with that, it may have a passthrough device malfunctioning.
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Old 11-10-2014, 05:09 PM   #13
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Not sure about a converter. I'm familiar with the inverter, but kind of drawing a blank when you mentioned converter.
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Old 11-10-2014, 05:40 PM   #14
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Your inverter is also your converter and battery charger - all functions in one box.

If the inverter leds aren't lighting up, it isn't seeing battery power either. Either no power reaches it, or it has failed and doesn't recognize it. With shore power disconnected, check the voltage on the inverter battery terminals. Also look at the battery cabling - it is quite possible that all power passes through the inverter terminals before going anywhere else, so a problem there shuts down everything. Look for a large cartridge fuse on the battery + cable - could be blown. Mine has a 300A fuse there.
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