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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #1  
Old 06-20-2011
william c harrison william c harrison is offline
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Default House battery charge, SP36

My house batteries only charge when the engine is running. I checked
and no charge is being input when just the generator is running. What do I look for? The dc and battery charge rocker switches on the generator
electrical box are both on.

Chuck Harrison
Akron, Ohio
90 SP36
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William C. (Chuck) Harrison
Akron, Ohio
90 WL SP36
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Old 06-20-2011
Robert Britton Robert Britton is offline
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Does your coach have an auto or manual transfer switch...if manual it needs to be set in "generator" position. Is the generator supplying power to the rest of the coach?
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Marathon XL40
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  #3  
Old 06-20-2011
william c harrison william c harrison is offline
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It is an auto xfer switch, and, yes the rest of the coach gets power.
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William C. (Chuck) Harrison
Akron, Ohio
90 WL SP36
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  #4  
Old 06-20-2011
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Rick Rick is offline
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Is your battery charger plugged in?
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  #5  
Old 06-20-2011
Bruce Bruce is offline
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Do you have AC power in the coach when the gennie is running? Are there 2 large 110 breakers somewhere for the gennie power? The FC's with the Onan have that breaker box.
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  #6  
Old 06-20-2011
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RGloverii RGloverii is offline
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Your battery chargers are located in the right front storage bay (in front of the right front tire). You will either have one or two. They should be plugged into a normal 'household' receptacle in that bay.

Ok. Let's do some testing:

*Plug your coach into shore power, or start your genny. Make sure both legs of 110v are up. If you're connected to a 50 amp supply, or using the generator, you should be ok. (if not, let us know)

*If the battery chargers weren't plugged in, plug them in. See if your batteries are charging now.
*If they WERE plugged in, unplug one of them. Plug a desk lamp or other 110v appliance (that you know works) into one of the receptacles. Does it work??
*If the desk lamp does NOT work, check the circuit breaker labeled battery chargers (or something like that). The main breaker panel is located to the left of your stairs as you walk in the coach.

Hopefully, this will get you started in the right direction. Let us know the results of your diagnostics, and we'll proceed further if necessary.

Don't worry, we'll get you straightened out!!

-Robert
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Old 06-20-2011
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Do the chargers work when on shore power? Is 120V present at the receptacle the charger(s) plug into? If not is the circuit breaker on in the fuse box?. Is the breaker on but not passing current?

If 120V is present - then is the charger plugged in, is it enabled, is the output fuse OK? Does 12V come out and where does it go? Is the output wired correctly?

You get the idea - start at the source and work your way back.

It's gonna take a while to charge the batteries from the generator - are you waiting long enough?
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Leonard Campbell
Trufant, MI
1986 PT40
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  #8  
Old 06-22-2011
william c harrison william c harrison is offline
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Default House battery charger

Thanks guys for all the tips. The problem turned out to be a fried
Intellipower 9100 unit. I called them and they do a replace/exchange for
$100.00.
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William C. (Chuck) Harrison
Akron, Ohio
90 WL SP36
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  #9  
Old 06-23-2011
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GreenBird GreenBird is offline
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Thanks for the follow up - always like to know the outcome - glad you found it OK.
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