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Old 09-01-2009, 06:11 PM   #15
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Dunno'

... mine runs my a/c fine on gasoline or propane (haven't yet tried natural gas) but I "think" my a/c is only 11k btu. Just for fun and as a test, I ran it all one afternoon in 98 degree heat, and in full sun. Genny ran fine, a/c ran fine, coach was cool as could be. I'd too would end to suspect your a/c unit's compressor motor capacitor, or that there was other "stuff" running in the coach ...
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Old 09-01-2009, 06:14 PM   #16
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Originally Posted by FastMikie View Post
I just got my new EF2400IS with the tri-fuel option and IT WOULD NOT START THE AC unit (new 13,500 BTU "AirV" from Carrier, on a Sport 17).

The service rep at the local Airstream dealer called Carrier who says that the startup draw on the AC unit is 28-29 amps (about 3335 watts), and that's way more than the 2400 max that the Yamaha generator puts out.

What could be letting all you guys use this generator and not me?
What am i missing?

Thanks for any help you can offer.
According to the Carrier AirV specs, these units require a 20A circuit breaker -- unless I got the model wrong, I think the 28-29A quote is a tad off... The specs also indicate ~12.8-14.1 full-load amps.

Perhaps while on generator you can try starting with fan only, then once operating kick in the cooling mode at a higher temp, feathering it down to your desired setting once you know the compressor is doing its thing.

I found something like this technique in the troubleshooting section of the installation/owner's manual for the AirV. Might work for you.

Cheers,
-jd.
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Old 09-01-2009, 06:35 PM   #17
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Mine won't start my ac. The gen trips its overload switch.

I won't try it again.
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Old 09-01-2009, 09:16 PM   #18
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Originally Posted by bhayden View Post
Might check into the addition of a hard start kit on the AC. That'll beef up the start-up capacitor and smooth out the start-up spike.

What size breaker is the AC on? If it's on a 20A breaker you've got a chance. If it's using a 30A breaker you probably aren't going to get there.
It's on a 20 amp breaker...
Any details on this "hard start kit"?
I gotta try something, or else I'm out a lot of money for nothing!
Thanks for your help.
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Old 09-01-2009, 09:20 PM   #19
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Quote:
Originally Posted by AirsDream View Post
... mine runs my a/c fine on gasoline or propane (haven't yet tried natural gas) but I "think" my a/c is only 11k btu. Just for fun and as a test, I ran it all one afternoon in 98 degree heat, and in full sun. Genny ran fine, a/c ran fine, coach was cool as could be. I'd too would end to suspect your a/c unit's compressor motor capacitor, or that there was other "stuff" running in the coach ...
There was nothing else running on AC, as I turned off the other two 20 amp circuit breakers.

I did try turning the temp all the way to warmest setting, and still No Go.

Thanks for your help.
Still at a loss...
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Old 09-01-2009, 09:27 PM   #20
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Quote:
Originally Posted by 5cats View Post
According to the Carrier AirV specs, these units require a 20A circuit breaker -- unless I got the model wrong, I think the 28-29A quote is a tad off... The specs also indicate ~12.8-14.1 full-load amps.

Perhaps while on generator you can try starting with fan only, then once operating kick in the cooling mode at a higher temp, feathering it down to your desired setting once you know the compressor is doing its thing.

I found something like this technique in the troubleshooting section of the installation/owner's manual for the AirV. Might work for you.

Cheers,
-jd.
Thanks for the link, but that's the same one I got from the Airstream dealer, but the 12.8 amp figure is for after the unit has started, not under start-up load, and it figures out to 1472 watts at 115 volts. I can operate the microwave which uses 1450 watts, but not the AC. The Airstream dealer service tech got the 28-29 amp figure from Carrier, today.

I guess I'm puzzled that it draws 28 amps at startup but it's on a 20 amp circuit breaker...

???
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Old 09-01-2009, 11:43 PM   #21
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Originally Posted by FastMikie View Post
Thanks for the link, but that's the same one I got from the Airstream dealer, but the 12.8 amp figure is for after the unit has started, not under start-up load, and it figures out to 1472 watts at 115 volts. I can operate the microwave which uses 1450 watts, but not the AC. The Airstream dealer service tech got the 28-29 amp figure from Carrier, today.

I guess I'm puzzled that it draws 28 amps at startup but it's on a 20 amp circuit breaker...

???
Hi, I don't believe in the 28 to 29 Amp start-up figuer. Your trailer has a 30 amp system in it and that would mean that nothing else can work with the air conditioner on. [plugged into 30 Amp system or generator] My generator has run my converter, my refrigerator, my television, and my 11,000 BTU air conditioner all at once. If your batteries are very low, then the converter is going to draw a lot of power; That and your air conditioner might overload your generator. Probably not feasable, but if you could try someone elses generator with your air conditioner, or your generator with someone elses air conditioner, you would be able to tell if you have a generator problem or an air conditioner problem.
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Old 09-02-2009, 12:30 AM   #22
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If the AC is on a 20A breaker your generator "should" work. The hard start kit is basicly an oversize start-up capacitor. A capacitor is like a battery that stores charge but is able to discharge really quick. So, the way the hard start kit works is the generator quick charges the capacitor and then the capacitor kicks over the compressor on the AC to even out the load.

Bob's right. First need to figure out if the problem is with the AC or the genset.

I bought the 2800 just to avoid these marginal issues. It works great as a home back-up with two refrigerators and a chest freezer. Gotta get on that natural gas/propane conversion... dump the pump
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Old 09-02-2009, 08:03 AM   #23
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I was at the 2009 Vintage Trailer Jam and it was hot (high 80s) and humid on open house day. My Yamaha 2400 connected to my 2009 International FB with 13,500 BTU system ran 12 hours straight with the AC and no problems. It does seem to struggle for a second or two when the compressor kicks in but then it runs smooth & quiet. We had the fridge on propane but ran the inverter, lights (all replaced with LED), and charger all day along with the AC. Up until that point, I'd never run the AC on the generator for more than 1/2 hour so I was quite pleased that it ran so well for so long without any problems as well.
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Old 09-02-2009, 10:33 AM   #24
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FastMikie:
I live in Lakeside, if you're willing to come out, I'd be happy to run the test that ROBERTSUNRUS suggested, I just purchased a Honda EU3000I Handi generator.
Lyle
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