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Old 03-21-2016, 11:27 AM   #1
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Should A/C work going down the road?

Have a 2011 Vista. Generator/A-C won't run when going down the road.
I have asked the co pilot to go to the back and turn on the generator and then the A/C but she refuses (won't drive so I can check). She says the system is not supposed to do that, I say the system should be working. Who's right?
If it's me, any thoughts as to why the system shuts off? works great when engine is not on.
Jim
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Old 03-21-2016, 11:29 AM   #2
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You are right. We run ours all the time like that. Don't know why yours is shutting off. Do you keep fuel above 1/4 tank.
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Old 03-21-2016, 11:31 AM   #3
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Jim...where is the genset located? Under driver seat behind left front wheel? If so, could it be an overheating issue? Ask me why I pose that question.
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Old 03-21-2016, 11:36 AM   #4
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Not only should it work, it may improve your mileage if you turn it on and turn the dash air off.
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Old 03-21-2016, 11:47 AM   #5
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RV-------Mobile self contained vehicle

YES generator should start/run and provide AC Power to operate any AC equipment
such as A/C Unit, Microwave, Fridge on AC etc.

Along with the 12V DC stuff.
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Old 03-21-2016, 12:51 PM   #6
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On my current unit, the AC would seem to operate while going down the highway but would not cool reliably. What I thought was an AC issue was finally solved when Winnebago replace the ATS with a new style ATS. What was apparently happening was the ATS would momentarily drop out over bumps and then the compressor(s) would enter their time delay mode for re-energizing and this apparently happened so frequently that there was no cooling from the roof top AC's.
New style ATS resolved the problem.

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Old 03-21-2016, 12:58 PM   #7
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I have started the genset and AC and driven down the road that way to exercise the genset before with no issues. Normally don't do it as my dash AC is strong enough to keep the entire RV at a comfortable temperature when traveling.
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Old 03-21-2016, 01:29 PM   #8
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jim1eddoc, First the obvious, your coach does not have a ATC(Automatic Transfer switch) so when you unplug the power cord from the camp ground power pedestal you must plug it into the generator power cord rcp next to the power cord box.
Now if you are doing that check the generator start switch lights when the generator stops. They will flash a code that will indicate the cause of the generator stopping.
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Old 03-21-2016, 03:47 PM   #9
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So in this scenario:

Parked, no shorepower.
Start the generator.
Turn on the AC.
Start the engine.
Drive.

The AC stops when you start the engine? Start driving? Right away? After some time? Does just the AC stop? Or the generator?

The systems (generator - driving) should be independent. Something does seem wrong...
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Old 03-21-2016, 04:53 PM   #10
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Waiting for answers to above questions.
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Old 03-21-2016, 04:58 PM   #11
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The generator and AC should continue to operate while driving down the road. If Onan gas generator a common problem that causes the generator to cut off when moving is the low oil sensor in the generator. The oil level needs to be at the very tip top to keep the sensor from activating.
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Old 03-21-2016, 07:56 PM   #12
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Quote:
Originally Posted by tderonne View Post
So in this scenario:

Parked, no shorepower.
Start the generator.
Turn on the AC.
Start the engine.
Drive.

The AC stops when you start the engine? Start driving? Right away? After some time? Does just the AC stop? Or the generator?

The systems (generator - driving) should be independent. Something does seem wrong...
I'll add to this list:
"Parked, no shorepower.
Start the generator.
Turn on the AC.
Start the engine.
Drive."

Put wife in drivers seat,
Teach her to DRIVE!


This is not meant to be sarcasitc. It's meant to be a very important "plan B" just in case something happens to you while you're out on a trip. What happenes if you start to feel chest pains or, you can't operate the coach very well and, you're in the middle of NO WHERE? What I'm speaking of can be a whole new thread but, I thought I'd throw this in there so maybe your "Co-pilot" can see how important, being able to operate that coach, in the event you can't.
Scott
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Old 03-22-2016, 06:04 AM   #13
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In the warmer temps I usually run the generator to keep the basement AC cooling the coach. From what I understand the Generator uses about a gallon of fuel per hour to run the AC and the engine AC supposedly uses much more. In the cooler weather it is just the opposite as the engine heat is a benefit of the engine already running at no extra cost. My Wife is comfortable in the summer when I need to put on a jacket in the coach .
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Old 03-22-2016, 07:59 AM   #14
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This sounds like my problem where a brand new generator would occasionally shut down after driving for a while. An Onan tech in California told me that the generator fuel pump has limited performance, and that sometimes an auxiliary fuel pump is needed if the generator is too far from the chassis gas tank. I added a supplementary fuel pump in the generator line, and the problem disappeared.

Quote:
Originally Posted by jim1eddoc View Post
Have a 2011 Vista. Generator/A-C won't run when going down the road.... any thoughts as to why the system shuts off? works great when engine is not on.
Jim
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