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Old 04-26-2014, 06:54 PM   #1
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Is this Normal??

Today when getting the TT ready for an upcoming trip, I noticed that when I had the 12v overhead lights on in the bathroom (1), kitchen (2), dining area (2) and bedroom (1), the WFCO converter fan was running.. Have never heard this before except when the emergency brake switch was accidentally pulled thus actuating my brakes without my knowledge... The trailer is plugged into the garage 110v power and the batteries (2 - 12v) are fully charged / all cells read good... When I shut off just one of the lights, the fan in the converter shuts off.. Am I working the converter at max capacity creating heat (need fan) with this many lights on?
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Old 04-26-2014, 07:07 PM   #2
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Normal. It's cooling off the extra heat from the load. Even with it plugged into 110V, some 12V is still coming from the battery unless you've got it disconnected. Also, with everything running, the voltage drop will most likely cause it to try to charge your batteries, adding to the load. It's providing 12V and charging the battery at the same time at this point.
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Old 04-26-2014, 07:07 PM   #3
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Normal.
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Old 04-26-2014, 07:09 PM   #4
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One way to tell would be to unplug and then use a clamp meter of your battery positive wire. Turn lights on one at a time and see what amp draw you are getting from each... if anything is really heavy, you might want to consider it as a candidate for LED replacement.
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Old 04-26-2014, 10:09 PM   #5
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I did not think a clamp meter worked on DC but then I am just an old guy
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Old 04-26-2014, 10:18 PM   #6
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Hey...ya learn something new everyday Wilky...try this one sometime...nice and cheap and works like a charm on both.
\Amazon.com: Auto ranging AC/DC Digital Clamp Meter: Home Improvement

They have 'em as low as $43 bucks but I like this one.
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