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06-11-2015, 01:38 PM
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#1
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Senior Member
Join Date: Jul 2013
Posts: 216
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Onan Quiet Diesel 7500 runs but no power
I ran the Onan Quiet Diesel 7500 gen in my coach yesterday with no problem. After accidentally overloading it, however, it no longer provides power to the coach.
Resetting the circuit breaker did not fix the problem.
I tested the transfer switch -- HOT1 is live, HOT2 is not.
Does this sound like a bad circuit breaker?
Any other troubleshooting assistance would be appreciated.
Thank you.
Liz
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Full-time since May 2013 in a 2002 Newmar Dutch Star DSDP 4095 / Pegasus
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06-11-2015, 02:01 PM
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#2
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Senior Member
Join Date: May 2004
Location: Auburn, CA, Havasu, AZ & Mulege, BCS
Posts: 5,385
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I'm guessing the xfer switch isn't at the gen:
On your rig there is either a cord exiting the gen & going thru the frame to the xfer switch, or from the gen to a j-box. There are connections inside the gen & inside any j-box up to the xfer switch. Likely your overload snafu'd one of the connections. I'd start at the gen breaker(s) and see if you have a bad connection there. If no and voltage is passing thru the breaker & out into the coach, follow the cord & check all intermediate connections. If no voltage at one leg of a breaker, then its internal to the gen cabinet. You can probably find it w/diligence.
Not likely, but check to see if the breaker actually reset- full OFF then ON again, see if it stays in full ON.
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Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
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06-12-2015, 08:54 AM
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#3
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Senior Member
Join Date: Jul 2013
Posts: 216
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Thanks Mike.
I'll look for the j-box and a bad connection there.
The breaker stays in full ON. It never tripped.
Liz
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Full-time since May 2013 in a 2002 Newmar Dutch Star DSDP 4095 / Pegasus
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06-12-2015, 05:46 PM
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#4
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Senior Member
Monaco Owners Club Freightliner Owners Club
Join Date: Mar 2015
Posts: 169
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no power
on my generator same as yours i have to push the breaker off firmly before it will reset i also dont think its in the transfer switch did it trip a breaker in the panel box MIke
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 lead follow or get out of the WAY
1998 HR Endeavor 5.9 Cummins
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06-13-2015, 06:48 AM
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#5
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Senior Member
Join Date: Jul 2013
Posts: 216
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Quote:
Originally Posted by redtail
on my generator same as yours i have to push the breaker off firmly before it will reset i also dont think its in the transfer switch did it trip a breaker in the panel box MIke
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The gen breaker never tripped. I have pushed it off and on firmly several times.
Would power come out of the generator at all if the breaker was not resetting? I'm getting partial power out of the gen.
No, it did not trip a breaker in the panel box.
Thanks Mike.
Liz
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Full-time since May 2013 in a 2002 Newmar Dutch Star DSDP 4095 / Pegasus
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06-13-2015, 07:07 AM
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#6
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Senior Member
Join Date: May 2014
Posts: 1,368
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Sir,
Does this generator have two breakers, one for each two legs of a single phased system??
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Dan & Loretta, US Army Retired Aero Scout Pilot
2012 Fleetwood Providence 42P Class A/DP
Spartan Chassis, 8.9L Cummins 450HP
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06-13-2015, 08:11 AM
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#7
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Senior Member
Join Date: Nov 2007
Posts: 190
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The breaker on the generator is a single pole double throw type. It could have a good half and a bad half. Does everything work when you're hooked up to shore power?
__________________
07 Tiffin Allegro Bus 42QRP
08 Dodge Dakota toad
Sea eagle 10.6 inflatable
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06-13-2015, 10:22 AM
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#8
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Senior Member
Join Date: Jul 2013
Posts: 216
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I am hooked up to 15AMP service. Everything but A/C works.
__________________
Full-time since May 2013 in a 2002 Newmar Dutch Star DSDP 4095 / Pegasus
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06-13-2015, 01:54 PM
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#9
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Senior Member
Join Date: Nov 2007
Posts: 190
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How about your inverter. There may be two breakers on your inverter depending what one you have. Also maybe you tripped a GFCI circuit. That would kill half of the electric in your coach.
__________________
07 Tiffin Allegro Bus 42QRP
08 Dodge Dakota toad
Sea eagle 10.6 inflatable
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06-13-2015, 03:10 PM
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#10
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Senior Member
Join Date: Jul 2013
Posts: 216
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My coach has no inverter. I reset both GFCIs in the coach. All outlets when plugged in.
__________________
Full-time since May 2013 in a 2002 Newmar Dutch Star DSDP 4095 / Pegasus
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06-13-2015, 03:10 PM
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#11
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Senior Member
Join Date: Jul 2013
Posts: 216
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All outlets work when plugged in.
__________________
Full-time since May 2013 in a 2002 Newmar Dutch Star DSDP 4095 / Pegasus
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06-14-2015, 07:27 AM
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#12
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Senior Member
Monaco Owners Club Freightliner Owners Club
Join Date: Mar 2015
Posts: 169
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generator problem
I am inclined to agree with the post for a bad breaker only half is resetting i have seen it a few times in panel boards not rv but i know it can happen hope thats it other option gets pricey fast ( problems in generator inverter) Mike
__________________
lead follow or get out of the WAY
1998 HR Endeavor 5.9 Cummins
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06-14-2015, 07:36 AM
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#13
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Senior Member
Join Date: Jul 2013
Posts: 216
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Thanks Mike and all. I'll make an appointment at the Cummins shop.
__________________
Full-time since May 2013 in a 2002 Newmar Dutch Star DSDP 4095 / Pegasus
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06-29-2015, 12:02 PM
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#14
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Senior Member
Join Date: Jul 2013
Posts: 216
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Update: The problem was a bad terminal junction block. Cost: $21 plus 1 hour labor.
Liz
__________________
Full-time since May 2013 in a 2002 Newmar Dutch Star DSDP 4095 / Pegasus
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