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06-27-2016, 05:30 PM
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#1
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Junior Member
Join Date: Nov 2013
Posts: 9
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ACs will not run on generator
Our ACs will run fine on shore line but will not run when driving on the generator. All outlets work fine, tv will turn on. Fridge does not want to stitch to ac power, runs fine on propane. We have been parked for several months, is that the problem. Or any suggestions. Thanks you.
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06-27-2016, 05:34 PM
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#2
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Senior Member
Ford Super Duty Owner
Join Date: Oct 2014
Posts: 706
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Did you check the breakers out on the generator? That would be the first thing I'd check. On our Onan 5500 the breakers are located next to the start switch.
__________________
US Army Retired - loving it in our Challenger 37TB.
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06-27-2016, 05:39 PM
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#3
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Junior Member
Join Date: Nov 2013
Posts: 9
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Have flipped breaker on generator, any other way to check Just one breaker. Onan Diesel 7500
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06-27-2016, 05:44 PM
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#4
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Junior Member
Join Date: Nov 2013
Posts: 9
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Onan 7500, one breaker, have flipped breaker several times.
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06-27-2016, 05:53 PM
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#5
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Junior Member
Join Date: Sep 2012
Posts: 27
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Turn one air off and let one start then turn on the other
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06-27-2016, 05:55 PM
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#6
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Senior Member
American Coach Owners Club
Join Date: Jul 2007
Location: SW Florida
Posts: 2,971
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Quote:
Originally Posted by sandbri1
Our ACs will run fine on shore line but will not run when driving on the generator. All outlets work fine, tv will turn on. Fridge does not want to stitch to ac power, runs fine on propane. We have been parked for several months, is that the problem. Or any suggestions. Thanks you.
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Sounds like one leg of a 50amp service is open and whether it be because of the genset and a breaker contained there in or with one of the legs not making with the transfer switch. Both legs in fact, if the power you're seeing on the outlets is coming from your inverter and if you indeed have one.
Some of the same symptoms are present with a loss of 12vdc, but don't see the correlation with running the genset.
__________________
07 Revolution LE 40E_1 1/2 Baths_Spartan MM Chassis_06 400HP C9 CAT_ Allison 3000
Dinghy_2010 Jeep Wrangler JKU ISLANDER
1998 36ft. National Tropi-Cal Chevy Model 6350 (SOLD)
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06-27-2016, 05:58 PM
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#7
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Senior Member
American Coach Owners Club
Join Date: Jul 2007
Location: SW Florida
Posts: 2,971
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Quote:
Originally Posted by sandbri1
Onan 7500, one breaker, have flipped breaker several times.
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If tripped, flipping won't get it and must be fully returned to the off position to reset and before turning it back on.
__________________
07 Revolution LE 40E_1 1/2 Baths_Spartan MM Chassis_06 400HP C9 CAT_ Allison 3000
Dinghy_2010 Jeep Wrangler JKU ISLANDER
1998 36ft. National Tropi-Cal Chevy Model 6350 (SOLD)
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06-27-2016, 06:02 PM
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#8
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Senior Member
Monaco Owners Club Vintage RV Owners Club
Join Date: Feb 2015
Location: East Texas
Posts: 716
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If you haven't been exercising your gen every month you might need to Cleaning Generator Slip Rings and Brushes - Part 19 -
__________________
1995 Monaco Dynasty
32' B5.9 Banks, 6 speed Alison 3060
2008 HHR Panel toad 
Safe-T-Plus
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06-27-2016, 06:04 PM
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#9
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Senior Member
American Coach Owners Club
Join Date: Jan 2011
Posts: 2,742
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We're only guessing until you let us know your MH make and yr and your Generator model #
__________________
Chuck
Brownsburg Indiana
1992 American Eagle-8.3C-450hp
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06-27-2016, 06:54 PM
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#10
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Senior Member
American Coach Owners Club
Join Date: Jul 2007
Location: SW Florida
Posts: 2,971
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Quote:
Originally Posted by tropical36
If tripped, flipping won't get it and must be fully returned to the off position to reset and before turning it back on.
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Could be that you're not getting anything out of the genset, to begin with, while we're pulling at straws here, but you'll need someone with a voltmeter for that and for checking on both ends of that breaker.
Do you perhaps have a light on the generator's voltage regulator board, that might be telling you something?
All this still requires proper troubleshooting procedures after checking all the basics.
__________________
07 Revolution LE 40E_1 1/2 Baths_Spartan MM Chassis_06 400HP C9 CAT_ Allison 3000
Dinghy_2010 Jeep Wrangler JKU ISLANDER
1998 36ft. National Tropi-Cal Chevy Model 6350 (SOLD)
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06-27-2016, 06:57 PM
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#11
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Member
Join Date: Feb 2015
Location: Fort Mill, SC
Posts: 38
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Mine did same thing, bad transfer switch.
__________________
Dave KN4IZM
Co-Pilot:Linda. Paw-Pilot:Koz
Fort Mill, SC 2004 Fleetwood Revoluation 40C DP
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06-27-2016, 07:01 PM
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#12
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Senior Member
American Coach Owners Club
Join Date: Jul 2007
Location: SW Florida
Posts: 2,971
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Quote:
Originally Posted by REV40C
Mine did same thing, bad transfer switch.
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As I said before, I never will figure out, what these transfer switches are good for and can think of a lot better ways, for spending the same money.
__________________
07 Revolution LE 40E_1 1/2 Baths_Spartan MM Chassis_06 400HP C9 CAT_ Allison 3000
Dinghy_2010 Jeep Wrangler JKU ISLANDER
1998 36ft. National Tropi-Cal Chevy Model 6350 (SOLD)
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06-27-2016, 08:17 PM
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#13
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Junior Member
Join Date: Nov 2013
Posts: 9
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Thank you all
The Generator is an Onan 7500. No meters to check with so will have to get a technician. I really appreciate your input and will share with hubby to see if he can do anything from your suggestions.
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06-27-2016, 08:46 PM
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#14
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Member
Join Date: Dec 2008
Posts: 59
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If you have an EMS display it should show you if you have 50 amps,how many amps are being used by the RV,if all the circuits are energized. Usually 6 green indicator lights,numbers for amps used and one green indicator for 50 amps.
__________________
Morris & Lena
2001.5 Fleetwood Discovery CAT 3126, 2006 Dodge Dakota 4x4, Arctic Cat TRV, lots of prospecting gear.
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