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Old 09-20-2013, 03:51 PM   #1
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Join Date: Jan 2013
Posts: 3
2007 dolphin

My 34' Dolphin has done well on a 5000 trip until today. When I plug in OR plug in my genrator, only the stuff on my AC bus works; A/C, microwave,water heater. It sounds like the inverter in my DC compartment is "pulsing" or othrwise "struggling".I have voltage at my AC box, and have, for, now, turned off the CB that goes to the inverter. I would sure liketo have a wiring diagram! Ihave the workhorse info, but nothing on the RV portion.

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Old 09-20-2013, 04:13 PM   #2
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Location: Unionville, Tenn.
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You might want to re-post this over in the Nation forum where some one might be able to help you, but, i think you're on the right track with your thinking,

Douglas M. Morgan RVM96
04 Dolphin 6375 LX W-24 Chassis #434136
"The Journey is our Destination" Unionville, Tn.
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Old 09-20-2013, 04:25 PM   #3
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I had a similar problem in a 5th wheel and turns out it was a bad battery dragging the 12 volt side down.
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Old 09-20-2013, 04:28 PM   #4
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Location: Arizona West RV Park, Yuma, Az
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Is your inverter just an inverter, or does it also do converting to 12v and charge the batteries?

If the later, by cutting power to it you will soon drain the batteries if not driving. By all means, go to the National RV Owners forum with this.
John & Clare Lyon
2007 43.5' Monaco Dynasty Palace III (All Electric)
Towd: 2011 Chevy Equinox
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Old 11-15-2013, 09:24 PM   #5
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Artno, did you ever get the wiring diagrams you were looking for?

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Old 11-18-2013, 12:55 PM   #6
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Location: Lac Du Bonnet, Manitoba
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I once had a problem like this. I disconnected house batteries, engine battery and shore power , then reconnected them and the convertor/inverter unit(Freedom 458) worked normally again. I don't know why it happened & it never re-occurred.
Ellen & Greg
08 National Dolphin DL-35Ci, RoadMaster Rear Sway Bar, Rear Trac Bar,
Workhorse W22, Kelderman Air Ride, Towing 08 Smart Car
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Old 11-23-2013, 02:20 PM   #7
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Spartan Chassis
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I have a 2001 National Marlin with a 458 inverter/converter (2000w). Sometimes it hangs up and the inverter circuit won't activate when switching from shore to inverter, etc. I think it is the automatic transfer switch in the inverter not engaging.

If I go bang my hand on the outside of the unit, it will almost always engage and reconnect the circuit. It is quite expensive to repair or replace one of these so I will continue to "bang" it when needed until I have time to look into it further. My guess is that the switch gets stuck in the open position for the invert circuit. Yours may be a completely different issue since you can hear it pulsing.

The transfer switch is quite small and buried inside the unit. I have had the cover off but at the time I had not figured out the "banging" routine. It only happens occasionally anyway.


John & Deanie, Corky and Benji (best buddies)
2001 National Marlin 390 DP
"Try to live up to your dog's opinion of you."
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