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Old 12-12-2015, 11:16 PM   #1
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No 12 volt

We have a 2008 36 ft Alpine Diesel. We do not have any 12 volt lights.
We noticed that before we lost all 12 volt lights, they were getting weaker & weaker, before we lost all 12 volt. This I would say took a month.

Have checked 12 volt fuses on the Main Panel & Basement Fuse panel.
It's like there is no power getting to the Panel, because when you pull the
fuse, they are good. No broken wire. Also notice there is no power getting
to the Comfort Control. The Ceiling Vent Fans don't work also.
Is there another main fuse somewhere, that would be from the Inverter to
the 12 volt wall panel?

Is there a Fuse Heater Switch?

110 works good. Inverter switches over ok. but just no 12 volt.

Appreciate any suggestions as where else we can look.

Verna
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Old 12-12-2015, 11:46 PM   #2
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Try reseting your vansco and see if that effects your 12 V.
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Old 12-13-2015, 12:43 AM   #3
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I had the same problem 5 years ago. As I remember there was just a loose connection on the power lead coming in to the basement fuse panel. All those circuits in the basement are fuse protected, so you could just run a temporary power lead in to see if everything works ok.
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Old 12-13-2015, 01:04 AM   #4
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What is house battery voltage?

Are you plugged into shore power?
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Old 12-13-2015, 06:38 AM   #5
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Agree, sounds like a bad connection. Start with the house batteries and confirm that you have power there, then check/clean connections [ground connections is as important as positive]. Next see if power is getting past main cut-off switches, then to the main panel on rear of bat compartment. If inverter is "working", meaning it both charges the house bats [on shore power] and creates 120v power [not on shore power], your problem is like down stream from bats. Vansco is largely [if not exclusively] a chassis side issue so stick with checking the house wiring.
PS--inverter doesnt directly provide 12v power for house lights, it only recharges house bats, when needed.
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Old 12-13-2015, 11:20 AM   #6
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Quote:
Originally Posted by SRX Coach View Post
We have a 2008 36 ft Alpine Diesel. We do not have any 12 volt lights.

We noticed that before we lost all 12 volt lights, they were getting weaker & weaker, before we lost all 12 volt. This I would say took a month.



Have checked 12 volt fuses on the Main Panel & Basement Fuse panel.

It's like there is no power getting to the Panel, because when you pull the

fuse, they are good. No broken wire. Also notice there is no power getting

to the Comfort Control. The Ceiling Vent Fans don't work also.

Is there another main fuse somewhere, that would be from the Inverter to

the 12 volt wall panel?



Is there a Fuse Heater Switch?



110 works good. Inverter switches over ok. but just no 12 volt.



Appreciate any suggestions as where else we can look.



Verna

If the 12 volts lights were getting weaker & weaker it sounds like the house batteries were not being charged. As suggested earlier what is the voltage measured at the batteries? Did you inadvertently shut off the charger? What do you have for an inverter/charger? There is most likely a parameter/switch for the charging function, tell us which one you have and we can help you find it in the menu.


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Old 12-13-2015, 01:24 PM   #7
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A loose connection shouldn't take a month for the lights to gradually dim, more likely they would just go out, or flicker off/on./ I'm thinking your house batteries are not getting charged.
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Old 12-13-2015, 10:58 PM   #8
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Yes we are plugged into 110.
Some suggestions have been to check the Vansco & reset.
Husband has not checked the voltage at the Batteries yet.
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Old 12-13-2015, 11:57 PM   #9
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Need to check chassis battery and if they are being charged. Sounds like they are not being charged.
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Old 12-14-2015, 10:30 AM   #10
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The same thing happened in our Alpine last winter. We were at an RV park plugged in to shore power, and we noticed that the battery voltage reading on the solar panel display had dropped over a couple of days, eventually into the high 11 volt range. Then one below-freezing morning the furnace would not ignite, and the refrigerator was off. All 110 volt appliances were working, but any appliance with a 12 volt controller was off. Our Xantrex inverter/charger had failed. We replaced it with a Magnum 2000 watt pure sine wave inverter/charger with new Magnum control panel and battery minder. An expensive but worthwhile upgrade.
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Old 12-14-2015, 03:15 PM   #11
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Where do we find the reset button for the Vansco? All the house batteries are testing
good & all the 12 volt fuses are good. Does the Surge Protector have anything to do
with the 12 volt system. If so where would be the reset button? Should we try to do a Reset on the Inverter? We are a little
nerves about doing this, because we at least have the 110 working. Yes we are plugged
in to 110. But it is when we leave the RV park & head over to Quartzsite, where we do
the dry camping, we will need the 12 volt lights etc.
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Old 12-14-2015, 04:02 PM   #12
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No, surge protector is unrelated, as it is in the 120 VAC system, and you know it is working, as you have 120 VAC into the coach.

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Old 12-14-2015, 05:12 PM   #13
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Correct me if I am wrong, but I don't think the Vansco system is involved in the house 12 volt systems. The Vansco controls the chassis 12 volt systems.

The Vansco is reset by turning off the battery disconnect switch for the chassis batteries, and waiting a few seconds.

What is the actual voltage read at the batteries, on the post itself? Fully charged batteries with a small load (an electric light turned on) should read around 12.8 volts or higher. Turn off the charger, and check the voltage. Then check it again with the charger turned on. When batteries are bulk charging, the voltage should be 14 volts or so. When in float mode (fully charged batteries), they should be charging at 13.3 volts or so, depending on the temperature in the battery compartment.
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Old 12-14-2015, 05:28 PM   #14
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If the batteries are getting charged and the lights are dim then the problem is a bad connection some where. It sounds like in the distribution panel but that is a guess. Your voltmeter is your friend in a situation like this.
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