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Old 02-23-2016, 12:11 PM   #1
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battery charging problems?? or what??

Hello Everyone,

Well, I'm a newbie and I'm still learning stuff everyday!!

You all helped me with my last problem with the by-pass suggestion on my water filter. Now I have a problem with my batteries....or my inverter/converter...im not sure so I thought I would turn to the pros for help.

Last night I kept noticing my lights in my 2011 Coachmen CrossCountry 401FK would go dim and then get bright again.

Well I woke up this morning to find my lights out. I'm plugged into the pedestal here in my park and I have electricity in the unit but not batteries.

Now you guys all know far more about this than I do but here's my stab at it.

My battery disconnect toggle switch located by the door is not letting me reset the batteries.

So I went out and filled up my coach batteries with distilled water....yep they were a little low.

so I checked by Magnum inverter indicator on my panel above my door. Initially it indicated invert, AC in, and absorb. Now it indicates invert, AC in and FLOAT. I guessing by filling up the batteries I gave them some more life....

However, after hours of waiting to see if anything will happen, I still do not have any coach batteries. Now my refrigerator is finally getting a tad bit warmer cuz its not running, even on propane.

Ok, so....what are your thoughts?

I've already called and left a message for a repair guy to come out and check everything.

Should I just sit back and wait for him or is there anything else I can do at this point?

Thanks for all your help and your time!!!
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Old 02-23-2016, 01:03 PM   #2
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I am not a Magnum guy but your system says AC in and Float? That would mean that it is charging your batteries and is happy with them. If you disconnect switch won't toggle, your batteries could be off, but then your Manum should be supplying plenty of 12 volts if all is well there. What concerns me is the inverter indication. You are plugged in so there shouldn't be an inverter running. Try starting your engine and see if the alternator will juice the batteries.

Something is definitely wrong with your system. If you put a voltmeter on the batteries, what do they read? You could have a bad connection on the batteries or at the chassis ground.But then your converter should be supplying all of the 12 volt you need anyway.

If that is the case, what happens if you hit your boost switch?
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Old 02-23-2016, 01:13 PM   #3
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On further thought...you have no 12v house batteries. Either they are dead and the Magnum is confused, or they are disconnected. however, if they are disconnected, the Magnum would generally be powering all the 12v loads anyway.

I bet both are true. They are dead and the Magnum let them die and is lying to you. The disconnect needs 12 volt to run so if it won't toggle that means yo have no 12v at all.

Perhaps your boost switch will help to tell us something since it will bring on your chassis battery in parallel with your dead house batteries. Perhaps starting the coach will start charging and give you 12v, but all of this depends on your specific installation and I am not familiar with it.
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Old 02-23-2016, 11:13 PM   #4
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I am learning all the time but IMO an $8 hydrometer from Autozone or wherever will tell you right off the bat if the batteries are any good. You might have other issues but you can rule out the battery as an issue. Go to harbor freight and buy a $5 voltmeter and measure the battery voltage while plugged in and charging. If you see anything over 13 volts, the converter is probably good.
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Old 02-24-2016, 07:00 AM   #5
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Your refrigerator should be able to run on just electric, it should switch automatically. My inverter stays on all the time, I never cut it off, just one more thing to forget when I'm getting ready to leave the campground. If you want to learn all about batteries then Google the 12 volt side of life, part 1 and 2.


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Old 02-24-2016, 07:54 AM   #6
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Originally Posted by spock123 View Post
Your refrigerator should be able to run on just electric, it should switch automatically. My inverter stays on all the time, I never cut it off, just one more thing to forget when I'm getting ready to leave the campground. If you want to learn all about batteries then Google the 12 volt side of life, part 1 and 2.


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Not true, when fridge is on shore power it still requires 12v to power the circuit board.


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Old 02-24-2016, 09:32 AM   #7
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Not true, when fridge is on shore power it still requires 12v to power the circuit board.


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True, I forgot


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Old 02-24-2016, 09:34 AM   #8
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True, I forgot


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Old 02-24-2016, 09:44 AM   #9
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Your refrigerator should be able to run on just electric, it should switch automatically. My inverter stays on all the time, I never cut it off, just one more thing to forget when I'm getting ready to leave the campground. If you want to learn all about batteries then Google the 12 volt side of life, part 1 and 2.


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Not to be a stickler here, but if his frig runs off an inverter, it isn't a propane/120 VAC unit, it is a residential model. As such, it has never,ever heard of 12 volts! i suppose you could power an LP/AC reefer off of an inverter but that really would make no sense.
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Old 02-24-2016, 09:58 AM   #10
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Originally Posted by retiredchief View Post
Hello Everyone,

Well, I'm a newbie and I'm still learning stuff everyday!!

You all helped me with my last problem with the by-pass suggestion on my water filter. Now I have a problem with my batteries....or my inverter/converter...im not sure so I thought I would turn to the pros for help.

Last night I kept noticing my lights in my 2011 Coachmen CrossCountry 401FK would go dim and then get bright again.

Well I woke up this morning to find my lights out. I'm plugged into the pedestal here in my park and I have electricity in the unit but not batteries.

Now you guys all know far more about this than I do but here's my stab at it.

My battery disconnect toggle switch located by the door is not letting me reset the batteries.

So I went out and filled up my coach batteries with distilled water....yep they were a little low.

so I checked by Magnum inverter indicator on my panel above my door. Initially it indicated invert, AC in, and absorb. Now it indicates invert, AC in and FLOAT. I guessing by filling up the batteries I gave them some more life....

However, after hours of waiting to see if anything will happen, I still do not have any coach batteries. Now my refrigerator is finally getting a tad bit warmer cuz its not running, even on propane.

Ok, so....what are your thoughts?

I've already called and left a message for a repair guy to come out and check everything.

Should I just sit back and wait for him or is there anything else I can do at this point?

Thanks for all your help and your time!!!
if you called a repair guy then wait don't screw it up anymore . i'd guess your batteries are toast . just adding distilled water will not rejuvenate batteries they will require a charge . how low were they ?plates showing ?
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