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Old 09-09-2017, 07:10 PM   #1
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Lost all power to generator

New to us motorhome. HELP!! We were running the generator and it was working fine, power to all systems. Plugged the coach power cord into the generator outlet, ran for a few minutes and completely shut down. We can't get power to the generator and non of the electrical systems work. We have checked all the fuses (we know about) and cant figure it out. Any ideas? Generac Generator
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Old 09-09-2017, 07:17 PM   #2
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Welcome to iRV2.

Sorry your here with problems .
Could you add info on your RV to the post
When you say completely shut down ?
Do you mean the generator quit?
Do you have enough fuel ( propane /gas/diesel )?
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Old 09-09-2017, 07:19 PM   #3
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You first start out with coach make, generator type, what electrical system are you referring to AC or DC or both. Have you located the owners manual and books and read them ?
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Old 09-09-2017, 07:20 PM   #4
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there should be one ir two circuit breakers ON the genny. make sure one or both have not tripped.
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Old 09-09-2017, 07:33 PM   #5
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Thank you all so much for your quick response....

National RV Dolphin
Yes there is enough fuel
it is the 12 volt system
have checked the fuses on the generator itself
Sorry just learning all the "parts"
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Old 09-09-2017, 10:42 PM   #6
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Quote:
Originally Posted by WIGGEDOUT View Post
New to us motorhome. HELP!! We were running the generator and it was working fine, power to all systems. Plugged the coach power cord into the generator outlet, ran for a few minutes and completely shut down. We can't get power to the generator and non of the electrical systems work. We have checked all the fuses (we know about) and cant figure it out. Any ideas? Generac Generator
Still not clear. You said you were "running the generator and it was working fine, power to all systems". But then you said you plugged the cord into the generator and it completely shut down?

To clarify some things: you have 2 different electrical systems. First is your 12vdc. All of your lights, furnace blower, water pump, and control board for fridge run on 12vdc. That is provided by your house battery, or the converter/charger when plugged in to shore power or generator. The generator does not provide 12vdc, only 120VAC.

Which brings us to your 2nd system; the 120VAC system. That runs your microwave, roof A/C, TVs, outlets, inverter (if equiped), and the previously mentioned converter/charger. 120VAC can only be provided by shore power, generator, or an inverter.

Now a few questions. Year/model of motorhome? Do you have power (120VAC) when plugged in to shore power? How about 12vdc? Does the generator start/run (if your fuel tank gets below about 1/4 or 1/3 the generator will stop)? There are breakers on the generator itself; check them. There are also breakers in the RV; check them. Which system doesn't work, 12vdc or 120VAC?
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Old 09-10-2017, 06:11 AM   #7
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Wiggedout.......is your microphone on...hello?...hello?.....trying to help.
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Old 09-10-2017, 08:11 AM   #8
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What you are saying is difficult to understand. You should have a transfer switch that changes your 120 v system between shore power and the generator. So just what do you mean when you say you plugged the shore power into the generator as that should not be possible.
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Old 09-10-2017, 09:24 AM   #9
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Motorhome is 2001 National RV Dolphin.

When the problem started the generator was running, plugged in the cord to run the 120v system off the generator to run the AC units. Had just set the AC controller for low speed when the generator shut down. After the generator shut down it would not turn over for restart. Also the AC controller has lost power, none of the house lights work and the leveling jacks won't drop down even though the control panel appears to have power. I did notice the microwave was working, and the dash radio was on prior to the generator shutting down this why I believed the 120v system was working on generator power (was not plugged into shore power at the time).

Currently the motor home is plugged into shore power. Microwave is working and I'm sure if there was power to the roof AC controllers that the AC's would work as well. I also have power to the inverter and all the outlets. The 12vDC system is where I have issues. No lights, no sign of battery power on the entry panel, no power to generator starter, no power to leveling jack motor (I do hear a click when the button to drop jacks are pushed but no movement). Batteries are new and solar panel control panel shows the system has 13v. Chassis battery is good and the engine starts just fine.

Fuel tank is at 3/4's so the low level shutoff should not be the issues.

First time on an issue like this. Thank you for the questions for additional information.
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Old 09-10-2017, 09:29 AM   #10
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Look for a fuse near the battery cable. If blown no 12 volt things work.
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Old 09-10-2017, 09:30 AM   #11
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What you are saying is difficult to understand. You should have a transfer switch that changes your 120 v system between shore power and the generator. So just what do you mean when you say you plugged the shore power into the generator as that should not be possible.
Some MHs don't have automatic transfer switchs. You plug the shore cord into the generator outlet, like using a portable generator.
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Old 09-10-2017, 09:33 AM   #12
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Quote:
Originally Posted by Rkesselus View Post
What you are saying is difficult to understand. You should have a transfer switch that changes your 120 v system between shore power and the generator. So just what do you mean when you say you plugged the shore power into the generator as that should not be possible.
Our 03 does not have an automatic transfer switch. We have to manually plug our shore power cord into the generator powered outlet. I suspect the OP has the same set up.

But i am confused as well. The OP stated no power to the generator. Does that mean it won't crank? Or does it crank and run, but not put out any power?

If the first, he might check to make sure the salesman switch hasn't been accidentally turned off. If i'm not mistaken, the coach batteries are used to start the genset on some rigs. This would explain the no power to the genset and the 12 volt system.

If the genset does run, then the breaker(s) on it need to be checked. From there, the breakers at the main panel inside the coach. There could also be some hidden high amperage 12 volt breakers near the coach batteries. My Mom's coach had a similar problem that took me awhile to narrow down. Found three 100 amp circuit breakers next to the coach battery, one that had tripped.
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Old 09-10-2017, 09:40 AM   #13
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I agree, it sounds like one of two things; either the main battery shutoff switch is turned off, or there is a main 12vdc fuse/breaker somewhere that is blown.
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Old 09-10-2017, 09:46 AM   #14
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Sounds like you let the house batteries run down. There is a storage relay you can get in the wrong position and do that. Check your house battery voltage. Starting the main engine may charge the house slowly but may let you re start the generator after a few minutes of run time. It will not solve your 12 VDC issue though. Converter might run and supply 12 VDC but still not be charging the batteries so fix that.
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