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Old 09-13-2011, 10:50 PM   #1
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Converter problem

2007 8313SS -- having problems with keeping battery charged. New battery. Seems like when I plug into city power it's not bypassing the battery and the lites are still drawing off it. How can I tell if the converter needs to be replaced or have another problem?
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Old 09-13-2011, 10:57 PM   #2
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The converter charges the battery; most high demand 12VDC come from the battery.

Check here.

WFCO - New world of power ideas - FAQs
Attached Files
File Type: pdf Manual - Power Distribution Center WF-8900 English.pdf (1.89 MB, 58 views)
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Old 09-14-2011, 09:14 PM   #3
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I understand that the converter does charge/maintain the battery, but doesn't it bypass the battery when you plug into city power and convert the 120v to 12v to run the 12v circuits?
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Old 09-14-2011, 09:19 PM   #4
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no it does not by pass the battery at any time .
it uses the battery as a buffer.

plug into 110v and check your output at the converter . anything over 13 volts and its working . anything under 12.5 and its not.

check your fuses and breakers .
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Old 09-15-2011, 06:59 AM   #5
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The instructions for bypassing the battery and checking output voltage of the converter is in the manual I posted. It is on one of the last pages under troubleshooting.
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Old 09-15-2011, 06:29 PM   #6
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Quote:
Originally Posted by clk623 View Post
I understand that the converter does charge/maintain the battery, but doesn't it bypass the battery when you plug into city power and convert the 120v to 12v to run the 12v circuits?
I had an '84 that did that. my understanding is that they haven't done that for awhile.
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Old 09-15-2011, 07:40 PM   #7
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While the converter will attempt to provide power to your 12VDC components without a battery installed; high demand items like the water pump; slide motors; landing gear and stabilizer motors; and furnace can demand more amps than the converter can manufacture and maintain 12VDC. The converter depends on the battery to make up the difference to maintain that voltage. Without the battery, that converter can "fry" itself trying. Again, this process can be easily seen with a battery monitor system that displays amp flow.
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Old 09-16-2011, 11:06 AM   #8
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My previous trailer was a 97 sprinter by keystone. It didn't even have a battery in it and everything worked fine. I wonder how i was able to get away with that.
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Old 09-16-2011, 12:11 PM   #9
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My previous trailer was a 97 sprinter by keystone. It didn't even have a battery in it and everything worked fine. I wonder how i was able to get away with that.
My guess, since you are asking, is that there were few high draw items for the converter to deal with. Today's campers have pretty much power everything. With no battery, you were also most likely below the gross weight requiring trailer brakes.
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Old 09-17-2011, 03:15 PM   #10
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converter upgrade

Has anyone performed a converter upgrade on a Parallax converter? I need to replace my converter and I want to upgrade to the P4600 replacement. This will give me a 3-stage charger for better battery life. This is a little more work than replacing with the exact 7155 model. Anyone have any suggestions and the best vendors?
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