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Old 02-09-2021, 09:45 AM   #1
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Oh no....dead batteries

Good morning every one, I went to check on my RV , 2017 Aspire, like I do every month but this time when I open the door, no stairs coming out. So I went to check the connection in the basement, everything looks normal, all the light are on. I'm hooked on a 110 v. Back in the coach, panel show Dead battery. the owner of the hangar told me he didn't think he had a power issue. What could have cause this? if I lost power for just a minute, would this change the set up on the panel? And dead battery? is it chassis or house or both? Thank you for any input.
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Old 02-09-2021, 09:54 AM   #2
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Steps are likely chassis battery. Push aux start button on dash and start the chassis. Things will charge pretty quickly.
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Old 02-09-2021, 09:57 AM   #3
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"Dead" or "disconnected"? Measuring the voltage at the battery terminals will tell you if it's discharged, or perhaps disconnected via blown fuse or tripped breaker.

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Old 02-09-2021, 01:36 PM   #4
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Quote:
Originally Posted by mbaril View Post
Good morning every one, I went to check on my RV , 2017 Aspire, like I do every month but this time when I open the door, no stairs coming out. So I went to check the connection in the basement, everything looks normal, all the light are on. I'm hooked on a 110 v. Back in the coach, panel show Dead battery. the owner of the hangar told me he didn't think he had a power issue. What could have cause this? if I lost power for just a minute, would this change the set up on the panel? And dead battery? is it chassis or house or both? Thank you for any input.
Michael,

The “dead battery” fault shown on your Magnum remote is because you lost power for an extended period of time and your house battery bank got below 9.0v. Power is now restored but your Magnum charger will not start charging until it sees a voltage of 12.6v. Your chassis batteries should be fine. Start your engine select high idle and press your battery boost switch until your Magnum remote sees 12.6v and starts charging on its own. Make sure shore power on your Magnum remote is set for 10A or less and dial back your charge rate to 50% so as not to overwhelm the 120v circuit you are plugged into.
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Old 02-09-2021, 02:20 PM   #5
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Curious - does the magnum somehow isolate the batteries from the rest of the 12V loads?

Mark B.
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Old 02-09-2021, 02:23 PM   #6
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Curious - does the magnum somehow isolate the batteries from the rest of the 12V loads?

Mark B.
Albuquerque, NM
No.
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Old 02-09-2021, 02:30 PM   #7
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OK, I re-read it. mbaril mentioned the lights in the basement were on but those were probably status lights and not house lights. Thinking how could the lights be on without the battery also receiving current. My bad. I've seen folks post the issue with the minimum restart voltage and I find it incredible it wouldn't at least supply some level of current to bring a dead battery back up. Seems with a processor in the charger there would be enough smarts to detect if there was a battery connected.

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Old 02-09-2021, 06:57 PM   #8
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Sorry, I should have be more specific, the lights from the basement were from the surge protector. The digital screen show everything is good
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Old 02-10-2021, 07:16 AM   #9
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Michael,



The “dead battery” fault shown on your Magnum remote is because you lost power for an extended period of time and your house battery bank got below 9.0v. Power is now restored but your Magnum charger will not start charging until it sees a voltage of 12.6v. Your chassis batteries should be fine. Start your engine select high idle and press your battery boost switch until your Magnum remote sees 12.6v and starts charging on its own. Make sure shore power on your Magnum remote is set for 10A or less and dial back your charge rate to 50% so as not to overwhelm the 120v circuit you are plugged into.


Thanks Don
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Old 02-10-2021, 07:25 AM   #10
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When I had this issue on my '15, I started the generator using the battery boost (engine running). Seemed to work. What might be more interesting, is why did the batteries not receive a charge whilst plugged in? GFI? or maybe the power management sensed bad power?
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Old 02-10-2021, 04:15 PM   #11
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When I had this issue on my '15, I started the generator using the battery boost (engine running). Seemed to work. What might be more interesting, is why did the batteries not receive a charge whilst plugged in? GFI? or maybe the power management sensed bad power?
Stew,

My guess is that the shore power he was plugged into failed for an extended period of time, and power returned some time prior to arriving back at the coach but by that time the batteries were to low to get charged by the Magnum charger.
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