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Old 06-06-2011, 11:40 AM   #1
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Question Running AC while using generator

We have an 2007 Alfa Founder diesel pusher. Have only owned it one year and bought it new from dealer. Question is: Can we use our central air conditioner while running the generator (no electricity available)??? Also, we can't seem to get the dash AC to work while the coach is running. Have looked in the owners manual and nothing there that helps us. Thanks for any help.
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Old 06-06-2011, 11:59 AM   #2
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Originally Posted by talkingwoman View Post
We have an 2007 Alfa Founder diesel pusher. Have only owned it one year and bought it new from dealer. Question is: Can we use our central air conditioner while running the generator (no electricity available)??? Also, we can't seem to get the dash AC to work while the coach is running. Have looked in the owners manual and nothing there that helps us. Thanks for any help.
If my math is correct...: You bought a 2007 coach 1 year ago new from the dealer.... which would have been 2010 you bought a 2007 coach. Not new then it was 3 years old now 4 years old right?

To answer your 1st question, yes, if you fire up your Generator... it should 'handle' your central AC power requirements... (have you not run your AC on gen before ?)

And your dash AC is most likely what you have been using to keep cool, and so it probably needs to be recharged with coolant.
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Old 06-06-2011, 12:04 PM   #3
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Check your owners manual but you probably should be running your generator once a month under load , the AC is a great load .
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Old 06-06-2011, 12:05 PM   #4
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When we drove across the Mojave Desert a couple of years ago, we had the Genset running all day to keep the coach cool. My new one has two AC units, but it hasn't been hot enough to need it yet. Soon, I hope... Jack
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Old 06-06-2011, 12:09 PM   #5
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If my math is correct...: You bought a 2007 coach 1 year ago new from the dealer.... which would have been 2010 you bought a 2007 coach. Not new then it was 3 years old now 4 years old right?
He could have been the first retail owner, thus it was a "new" coach...even though a couple of years old. We did that a few years ago, saved lots of money and had a "new" coach with full warranty.
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Old 06-06-2011, 12:28 PM   #6
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He could have been the first retail owner, thus it was a "new" coach...even though a couple of years old. We did that a few years ago, saved lots of money and had a "new" coach with full warranty.
I think fklosters point was the unit has been sitting unused for two-three years and we all know thats not good. There have been numerous posts on genset problems due to them not being used. They must be run at least monthly under 50% load to keep them operating properly. To the OP, the genset was installed for the primary purpose of supplying electricity to the roof top a/c (or basement). Has the dash air ever worked? If so, there could be too numerous reasons its not working now to go in to.
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Old 06-06-2011, 03:24 PM   #7
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We have never run the AC on generator before. In fact the only thing that works when our generator is running are the lights. ELectrical outlets don't work (don't know if they are suppose to or not) and of course the AC/Central heat. Someone mentioned to us that perhaps there is a switch that needs to be changed to allow these to work when using the generator. Any ideas on that one? Also we have never driven the coach in hot weather so don't know if the dash air was working properly.
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Old 06-06-2011, 03:36 PM   #8
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Check your owners manual but you probably should be running your generator once a month under load , the AC is a great load .
I run our generator once a month for about an hour, load it with our two heat pumps, run one on cool and the other on heat. Then after about a hour I switch the pumps around, the one that was heating to cooling and vice versa.
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Old 06-06-2011, 03:46 PM   #9
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Sounds as it the electric transfer switch is not working. This is an automatic switch. All electric outlets as well as the microwave, electric oven, televisions, etc will work off the generator also. The lights are working off the house batteries not the generator. They are 12volt lights.

It could also be a defective inverter/convertor.

If you're not sure what you're doing, take the motorhome to a service center as you are working with high voltage that can hurt you.
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Old 06-06-2011, 03:49 PM   #10
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Talkingwoman

If your dealer is close to you maybe you can get an appointment for them to go over how everything works on your Moho.

You might be able to find a mobile RV mechanic that can come to you and do the same thing.

Of course this will cost you a few bucks but is worth it.

jack
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Old 06-07-2011, 11:44 AM   #11
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If your 4 year old coach has never had the generator run under a load, its likely that you are in for a bit of a repair bill to get things working correctly again. The fact that the electrical outlets are not powered says there are problems. Take it to a qualified RV repair and get it checked out. As others have said, you should have been loading and running the gen set monthly.

Use it or lose it.
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Old 06-07-2011, 12:59 PM   #12
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Everything that works on shore power should also work on the generator. EVERYTHING!

If some things work and some do not, there may be a breaker tripped on the generator itself. It has its own circuit breakers, usually right on the front or top in easy view.

The dash a/c works like the one in your car. Turn the dial/switch to cool or AC, set the temperature control to what you like and it should work when the engine is running. If it does not, you need a serviceman.
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Old 06-07-2011, 01:34 PM   #13
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We have never run the AC on generator before. In fact the only thing that works when our generator is running are the lights. ELectrical outlets don't work (don't know if they are suppose to or not) and of course the AC/Central heat. Someone mentioned to us that perhaps there is a switch that needs to be changed to allow these to work when using the generator. Any ideas on that one? Also we have never driven the coach in hot weather so don't know if the dash air was working properly.
On our old 2000 Tiffin motorcoach We literally had to plug the shore line power cord in the 5000w on board gennerator. There wasn't an automatic transfer switch on the Coach's generator.

So basicly what you are running now with the generator is what runs off of 12v. battery power. look for a switch may be by the generator our currant coach has 2 switches there. Each operate a different part of the coach.
We have a 7000w. onans

good luck
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Old 06-07-2011, 11:02 PM   #14
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Since you bought the coach "new" a year ago, I assume the standard new warranty applies. If it were mine I'd get it back to the dealer for some warranty service on the genny and the motor air.

JT
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