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Old 12-04-2013, 08:39 AM   #11
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Quote:
Originally Posted by rattleNsmoke View Post
Chances are good it's a WFCO and better chance it's fried.
It is a Parallax 7155.
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Old 12-04-2013, 01:28 PM   #12
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Quote:
Originally Posted by tarfele

It is a Parallax 7155.
Probably worth saving.
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Old 12-04-2013, 01:39 PM   #13
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On our last trip had something like that. We we sitting there and the converter/charger fan was cycling, did not think that we had anything that was drawing power. I turn off the digital thermostat, the charger stopped cycling.

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Old 12-04-2013, 06:56 PM   #14
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I checked with a multimeter and testing the battery while plugged in it is a constant 13.67 and is not effected when the converter makes the noise. With everything off, that I can see, the fan kicks on every 1 minute and last for 2 seconds. When I turn on all of the light the fan cycles every 15-30 seconds and stays on for about 5 seconds. When the shore power is unplugged the battery tests at a steady 12.30.
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Old 12-04-2013, 08:36 PM   #15
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Interesting...if the battery is showing only 12.3V when the shorepower is unplugged, the battery isn't fully charged. Here's a chart of battery voltage vs capacity...



I don't understand why that would be. Did you leave the camper unplugged and the battery charge has run down? The fact that the converter is putting out 13.67V means that it's trying to do it's job to charge the battery.

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Old 12-04-2013, 08:44 PM   #16
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No, the camper has been on shore power since sunday afternoon. When I unplugged it it went from 12.80 to 12.30 in about 40 seconds and then stayed steady at 12.30
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Old 12-04-2013, 08:44 PM   #17
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Quote:
Originally Posted by Dave_Monica
Interesting...if the battery is showing only 12.3V when the shorepower is unplugged, the battery isn't fully charged. Here's a chart of battery voltage vs capacity...

I don't understand why that would be. Did you leave the camper unplugged and the battery charge has run down? The fact that the converter is putting out 13.67V means that it's trying to do it's job to charge the battery.

Dave
Just Again noted the rig is a 2010, could be batteries could be getting "tired"? Nearing 5 years if original units fitted.
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Old 12-04-2013, 08:48 PM   #18
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Battery was new when I purchased camper 3 months ago
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Old 12-04-2013, 09:18 PM   #19
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Quote:
Originally Posted by tarfele
Battery was new when I purchased camper 3 months ago
http://www.ebay.com/itm/Kraftmann-Ba...item35c42c9fbf.

If you can borrow or buy a cheap hydrometer, you can compare cell strength. Something is strange with that battery. The tester is as little as $7.00, close enough results for this work.
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