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Xantrax in 1995 U300 ilights are flashing

November 26, 2021, 11:33:14 am

We returned home from a trip to Savannah Sunday evening in our 1995 U300.
It was late and raining so we didn't plug the coach back in.
I went in the motorhome Tuesday morning and it had no power at all. Bob plugged it in when he got home from work and now the lights work but the furnace was blowing cold air.
I looked in the compartment above the door and the xantrax ilights are flashing.
Bob checked the stove and it won't come on either.
Could the zantrax malfunction cause the gas not to light or do I have two problems?
Thanks Susan

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Re: Xantrax in 1995 U300 ilights are flashing

Reply #1 – November 26, 2021, 11:36:05 am

Absolutely, first thing is to check HOUSE battery voltage.

If too low, the Xantrex will NOT attempt to charge (safety issue).

You will need to get battery voltage up to near 12 VDC before the Xantrex will take over.

You can jump from start batteries (boost switch) if the chassis batteries are good.  You can use a "stupid" automotive 12 VDC charger or jump the house bank from another vehicle.

Could it be something else-- sure.  But start with the likely AND no cost stuff first.

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Re: Xantrax in 1995 U300 ilights are flashing

Reply #2 – November 26, 2021, 11:40:20 am

Would the house batteries being low cause the lights to flash constantly?

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Reply #3 – November 26, 2021, 11:43:46 am

What lights are flashing???

Again, quick answer is to check house bank voltage with your digital voltmeter.

Always where to start when multiple different 12 VDC items stop working at the same time.

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Reply #4 – November 26, 2021, 11:48:36 am

The lights on the Xantrax itself, it looks like it's malfunctioning

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Reply #5 – November 26, 2021, 11:55:48 am

CO indicator on the floor will shut off the gas with low voltage. Once the house batteries are up, turn on the stove burners until gas comes out and once you can light them, your furnace should light.

Depending on your type of house batteries, find your problem before it happens again as they may not like a full discharge. Can be expensive.

Pierce

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Re: Xantrax in 1995 U300 ilights are flashing

Reply #6 – November 26, 2021, 12:01:30 pm

That makes sense. Would it help to run the generator to charge the house batteries?

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Reply #7 – November 27, 2021, 10:56:48 am

Yes, Run the genny and see if it charges. Zantrex has a tech department if you find it's defective and it's free

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Re: Xantrax in 1995 U300 ilights are flashing

Reply #8 – November 27, 2021, 11:59:24 am

Actually, the Xantrex is smart enough to NOT charge a deeply discharged battery (safety concern-- perhaps a dead cell.  And charging a 10 VDC battery at 14 VDC could have catastrophic results).

If voltage at the battery is below high 11's, use some other means of bringing them up to where the Xantrex will take over.  Choices are "stupid" charger, boost if chassis batteries are not also discharged, jump from another vehicle.

Said another way, do not start troubleshooting the Xantrex until you know that the issue is not a deeply discharged battery or poor connections between batteries and Xantrex.

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Re: Xantrax in 1995 U300 ilights are flashing

Reply #9 – November 27, 2021, 06:36:47 pm

Bob checked the batteries. All show charge of above 12.
Co2 detectors still have a fault light and when he presses the test light nothing happens.
Zantrax is no longer flashing but amp meter beside xantrax says - and then a upside down F / - in corner.
He just shut the batteries off for now so the don't discharge.
Is there a way to reset the co2 detectors and he doesn't know what the symbol on the amp meter means.
Thanks Susan

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