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 7/21/2002 7:04 AM
 
Howdy! My AC on my Prowler trailer won't work on a generator. Keeps popping circuit breakers on the generators. It's on the 30 amp main circuit in the trailer, but is a 20amp circuit itself. I used a Coleman 5000 watt and it would run the system for 40 seconds, then pop the breaker. I tried a Honda 3000 watt and it wouldn't even crank it before quitting. The system works plugged into shore power at an RV park. I've run other RV AC systems on the Honda generator without a problem. Given my automotive and home AC experience, this sounds like the compressor is going out. Any thoughts? Keith Hansen 19 foot 1994 Prowler Keith Hansen

Keith Hansen
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 7/21/2002 7:59 AM
 
Keith I run a 15000 on a Honda EU3000. I can only run the A/C with no other large appliances on.
Charles D. Scoville
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 7/21/2002 8:05 AM
 
Mine's a 13500 and I have the same generator. Won't even kick it over. Keith Keith Hansen

Keith Hansen
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 7/22/2002 8:38 AM
 
I run a late model Coleman, 13,500 BTU A/C with a Onan 2,800 Microlite. No problem at all. Before I replaced the A/C the Onan was running an older model Coleman. It hesitated and "burped" ever so often when the A/C compressor kicked in - but otherwise it did the job.
George
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 7/22/2002 12:39 PM
 
I would not assume the problem to be in the A/C just yet.
The A/C is probably on a 20 amp circuit breaker in the trailer. If it was drawing over 20 amps on shore power it should be throwing that breaker. Since it isn't I am going to assume that it isn't drawing over 20 amps.
It is quite likely that other items could be on inside the trailer when you plug it into the generator, such as reefer on A/C, power converter and possibly other items plugged in. This would throw the power draw significantly over 20 amps when the A/C is added.
I would make sure the generator is putting out the proper voltage, turn off all the breakers in the trailer, plug the trailer into the generator, flip the breaker for the A/C only and see what happens.
Regards
Rick Clermont, Fl. Regards
Rick Clermont, Fl.

Regards Rick Clermont, Fl.
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 7/22/2002 9:41 PM
 
Your a/c probably draws about 13 to 16A when it is in operation but it takes about 20 to 25A to start, until it comes up to speed. Put a good digital meter accross the supply from the generator and then kick the a/c on and watch to see what the voltage is doing. It is probably dropping down, which in turn will cause the current requirement to rise even higher. If so, the generator is just not capable of carring the current required to start the compressor. I would wager that is the problem, since it works fine on shore power.
Good Travelin !..............Kirk www.1tree.net/adventure/

Travelin Man
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 7/24/2002 9:19 PM
 
Thanks much for the ideas. We've been home now in Colorado Springs (at least 6100 feet altitude) for a few days so I hooked up the generator (Honda EB3000) to the trailer and it not only ran it fine, it ran the microwave oven at the same time! We were at Lake Powell, Utah (4000 feet)when the generator wouldn't pull the load with just the AC on and nothing else. I am totally confused. It was hotter at Lake Powell, but not over 100 degress F. About 95 when we tried the Honda and it wouldn't work. Doesn't sound like there's anything wrong with the AC here. How to I "put a good digital meter accross the supply from the generator and then kick the a/c on and watch to see what the voltage is doing." Plug the trailer into the generator, leaving enough gap so that I can touch the brass? My Radio Shack volmeter has an AC setting and I used it to check voltage output while we were at Lake Powell, but don't know how to tell what the amp draw is.

Keith Hansen This message was edited by Keith on 7-24-02 @ 8:24 PM

Keith Hansen
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 7/27/2002 7:26 AM
 
Anybody have any ideas why the AC/generator wouldn't work at 4000 feet at Lake Powell, and no problems at 6100 feet in Colorado Springs? Keith Hansen

Keith Hansen
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 7/27/2002 7:41 AM
 
Keith,
I have no idea why it wouldn't work at Lake Powell, and most likely no one else does either. The only thing I can think of is that it was so hot that the genset was kicking out due to a temp condition.
Drop me an email and I'll get together with you and show you how to measure the output voltage with a meter. Rich & Kim, Oreo too

Rich & Kim, Oreo too Prowler 5ver, TrailAir pinbox Makita Genset, Solar '84 Ford F250 http://rk-enterprises.home.att.net
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 8/5/2002 10:33 PM
 
Your AC system should only be drawing 17 to 22 amps on startup. If it is kicking a 20 amp breaker then you have one of two problems. You either have a weak breaker ( the cheap thing to fix ) or you have a Compressor problem. If you decide to get a new AC, I recomend Carrier. It draws only 10-12 amps on startup and only ways 90 lbs. 15 lbs lighter than a coleman. Good Luck If you don't know, call a Tech

If you don't know, call a Tech
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