Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 02-05-2017, 02:15 PM   #1
Member
 
DrHexx's Avatar
 
Join Date: Jan 2017
Location: Katy, Texas
Posts: 35
Onan 7500 quiet generator

Afternoon all. I've got a Fleetwood discovery, 2006. Recently my Onan generator quit powering my rig although the generator itself starts up just fine.

I tested voltage at the generator and am only showing 55 between ground and hot as well as neutral and hot.

I also tested voltage at the transfer switch and got the same reading.

Any clues as to what might be happening or where I might troubleshoot next?

Thanks!

Marc
__________________
Dr. Hexx- aka Marc
2018 Jayco Pinnacle 38FLWS
Katy, Texas
DrHexx is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 02-05-2017, 02:44 PM   #2
Member
 
Join Date: Jul 2011
Location: Colorado
Posts: 72
Check your circuit breakers on the gen by the start stop switch
djay is offline   Reply With Quote
Old 02-05-2017, 02:47 PM   #3
Member
 
DrHexx's Avatar
 
Join Date: Jan 2017
Location: Katy, Texas
Posts: 35
Quote:
Originally Posted by djay View Post
Check your circuit breakers on the gen by the start stop switch


There's only one and it is on. I flipped it up and down but nothing. The switch does feel a bit loose though.
__________________
Dr. Hexx- aka Marc
2018 Jayco Pinnacle 38FLWS
Katy, Texas
DrHexx is offline   Reply With Quote
Old 02-05-2017, 03:41 PM   #4
Senior Member
 
Join Date: Jul 2014
Posts: 35,349
Does it sound like the RPMs are comming up to normal speed ?

If not, you could try changing the fuel filter.
twinboat is offline   Reply With Quote
Old 02-05-2017, 04:01 PM   #5
Senior Member
 
billdreamlv's Avatar
 
Tiffin Owners Club
Join Date: Jul 2014
Posts: 487
Quote:
Originally Posted by DrHexx View Post
Afternoon all. I've got a Fleetwood discovery, 2006. Recently my Onan generator quit powering my rig although the generator itself starts up just fine.

I tested voltage at the generator and am only showing 55 between ground and hot as well as neutral and hot.

I also tested voltage at the transfer switch and got the same reading.

Any clues as to what might be happening or where I might troubleshoot next?

Thanks!

Marc
If it is not producing the required voltage it could also be a winding in the generator that broke. It could be a number of things but the fact that it is producing some voltage tells me that it is more likely a circuit, brush, or winding that has gone south. Most of the time the generator will produce the required voltage even at low speeds but you may have a current problem at low speeds. It should put out 12v even at idle.
__________________
Bill & Mary USN 69-73 ASW Technician, MBA.
2006 Tiffin Allegro Bus QDP 1060 watts solar
2012 Jeep Grand Cherokee '16 Polaris Razor 4
billdreamlv is offline   Reply With Quote
Old 02-05-2017, 04:03 PM   #6
Member
 
Join Date: Aug 2013
Posts: 42
Sounds like my 2007 version. That's what happened to mine over the summer first it was low voltage like that then after a while it ran fine putting out the correct voltage and than it started putting out to much voltage that's where I am now Onan is no help so I have an appointment with a shop to have it checked out.
rocky34 is offline   Reply With Quote
Old 02-06-2017, 03:38 PM   #7
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,563
The QD 7500 is an inverter-generator, so the inverter may have failed. The inverter gets it's DC from a traditional DC generator powered by the diesel engine, so it could be low DC voltage to the inverter as well.

Do both output hot legs show the same low voltage? To neutral and to ground?
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
Gary RVRoamer is offline   Reply With Quote
Old 02-06-2017, 06:54 PM   #8
Member
 
DrHexx's Avatar
 
Join Date: Jan 2017
Location: Katy, Texas
Posts: 35
Quote:
Originally Posted by Gary RVRoamer View Post
The QD 7500 is an inverter-generator, so the inverter may have failed. The inverter gets it's DC from a traditional DC generator powered by the diesel engine, so it could be low DC voltage to the inverter as well.

Do both output hot legs show the same low voltage? To neutral and to ground?


Yep they sure do. Right at 55 volts.

Marc
__________________
Dr. Hexx- aka Marc
2018 Jayco Pinnacle 38FLWS
Katy, Texas
DrHexx is offline   Reply With Quote
Old 02-06-2017, 07:40 PM   #9
Senior Member
 
billdreamlv's Avatar
 
Tiffin Owners Club
Join Date: Jul 2014
Posts: 487
Quote:
Originally Posted by DrHexx View Post
Yep they sure do. Right at 55 volts.

Marc
Not to be cute, but I suspect you lost a diode in your bridge rectifier.
__________________
Bill & Mary USN 69-73 ASW Technician, MBA.
2006 Tiffin Allegro Bus QDP 1060 watts solar
2012 Jeep Grand Cherokee '16 Polaris Razor 4
billdreamlv is offline   Reply With Quote
Old 02-06-2017, 08:04 PM   #10
Senior Member
 
8TiresRollin's Avatar
 
Join Date: Nov 2016
Location: Calgary, AB
Posts: 206
Send a message via Skype™ to 8TiresRollin
An inverter generator works as such : The rotating generator (probably brushless model) produces a DC voltage that is inverted electronically to an Alternating Current to mix into the house voltage system. The electronic inverter box will control the throttle of the generator engine to meet the exact demand of what the load is sized at. That is why you hear the generator apply more throttle if you plug a kettle in or an electric heater. The inverter system is an easier way to do this control for a mass produced item and generally works really good. You need to test the output of the DC side of the generator then if that is good then look at the inverter unit. It could be a floating neutral wire or something similar so be sure to check all connections with the POWER OFF and generator not running of course. First you need a circuit diagram of the unit and that should be available somewhere on the internet. Hope this helps
__________________
Barry & Cindy
2008 Dutch Star 4304, Cider color
Cummins ISL 425, 2013 Passat TDI Toad
8TiresRollin is offline   Reply With Quote
Old 02-06-2017, 08:11 PM   #11
Senior Member
 
Mr_D's Avatar
 
Country Coach Owners Club
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
A cheap VOM will not accurately read AC voltage. OP, what are you using to read the voltage?
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
Mr_D is offline   Reply With Quote
Old 02-06-2017, 08:34 PM   #12
Member
 
DrHexx's Avatar
 
Join Date: Jan 2017
Location: Katy, Texas
Posts: 35
Quote:
Originally Posted by Mr_D View Post
A cheap VOM will not accurately read AC voltage. OP, what are you using to read the voltage?


I don't remember the brand name but I did test it on some 120 outlets and it read fine.
__________________
Dr. Hexx- aka Marc
2018 Jayco Pinnacle 38FLWS
Katy, Texas
DrHexx is offline   Reply With Quote
Old 02-06-2017, 08:36 PM   #13
Member
 
DrHexx's Avatar
 
Join Date: Jan 2017
Location: Katy, Texas
Posts: 35
Quote:
Originally Posted by 8TiresRollin View Post
An inverter generator works as such : The rotating generator (probably brushless model) produces a DC voltage that is inverted electronically to an Alternating Current to mix into the house voltage system. The electronic inverter box will control the throttle of the generator engine to meet the exact demand of what the load is sized at. That is why you hear the generator apply more throttle if you plug a kettle in or an electric heater. The inverter system is an easier way to do this control for a mass produced item and generally works really good. You need to test the output of the DC side of the generator then if that is good then look at the inverter unit. It could be a floating neutral wire or something similar so be sure to check all connections with the POWER OFF and generator not running of course. First you need a circuit diagram of the unit and that should be available somewhere on the internet. Hope this helps


Lol. It tells me a lot but I can do basic wiring in my house, change an outlet or install a switch but now you're getting well beyond my comfort zone.

It's sounding like I need to find a place to have it looked at.

Marc
__________________
Dr. Hexx- aka Marc
2018 Jayco Pinnacle 38FLWS
Katy, Texas
DrHexx is offline   Reply With Quote
Old 02-15-2017, 08:04 AM   #14
Senior Member
 
bob_5297's Avatar
 
Join Date: Jan 2013
Location: PA
Posts: 119
Mine would not supply power of my coach battery was dead. Put a new battery in and everything worked. Don't know if this will help you but it worked for me.
__________________
0lllllll0
bob_5297 is offline   Reply With Quote
Reply

Tags
fleetwood discovery, generator, onan, quiet



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need help with Onan 7500 quiet generator, please Sloopie1 Class A Motorhome Discussions 10 06-30-2015 09:40 AM
Onan Quiet 7500 Generator donwat91 RV Systems & Appliances 2 09-04-2013 03:26 PM
Service on Onan 7500 quiet diesel Generator 1ciderdog MH-General Discussions & Problems 11 12-12-2011 05:13 PM
Onan 7500 Quiet Generator leaking? zoocrackers Winnebago Industries Owner's Forum 5 10-15-2011 06:35 PM
Replacing the circuit breaker on an Onan 7500 Quiet Diesel Denali Monaco Owner's Forum 9 06-17-2010 10:27 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 11:25 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.