Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
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 09-08-2011, 03:18 PM   #1
Junior Member
 
Join Date: Jun 2011
Posts: 18
Generator Output

We have a 99 Fleetwood Discovery 37V we bought last year.

Where is the most accessible point to check if I have 110v out from the generator?

I found a glass fuse (F1) which tested OK. Didn't find F2 but it's for a solenoid and my Onan Gen starts so it should be OK. Unit appears to have some wiring work done before. If I can verify I have generator output I will look for a wiring problem.

Thanks for any help!
__________________

__________________
dak605 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 09-08-2011, 03:23 PM   #2
Senior Member
 
Always-RVing's Avatar
 
Fleetwood Owners Club
Join Date: Aug 2009
Posts: 959
Once the gen is running, you should see 110v at any convienient 110 outlet. Also, you'll hear the motor rev up as power demand goes up.

I don't know why Onan does not put a convienience plug on it. The breaker is touchy when switching over from shore to gen. Turn off high power items (AC) when switching over.
__________________

__________________
Fleetwood Providence 2008 40e
Ford F-350 4x4 Diesel 6.0L 2006
Honda CR-V 2006
Always-RVing is offline   Reply With Quote
Old 09-08-2011, 03:32 PM   #3
Senior Member
 
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 4,383
If you are having a problem with no voltage in the coach, The easiest way to test is to remove the cover of the transfer switch. Check the voltage on the gen. incoming wire. If there is no voltage here. go back to the gen. and remove and check for voltage on the back of the circuit breaker.
__________________
1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
ga traveler is offline   Reply With Quote
Old 09-09-2011, 10:15 AM   #4
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,816
On many ONAN's if it is running you have 120v out.

I would start at the Automatic transfer switch.. Then the Generator output J-Box (In my rig that is in the next compartment) From there it gets real hard.
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 09-09-2011, 10:27 AM   #5
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,085
Most Onans will shut down if they have no power output at the generator itself. Next place to check is at the transfer switch, then the laod center (breaker box).
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 09-09-2011, 02:53 PM   #6
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,816
Dang Gary.. We think alike (At least on this problem)
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 09-09-2011, 03:16 PM   #7
Junior Member
 
Join Date: Jun 2011
Posts: 18
Generator Output

I can only get one of the screws out of the front of the gen control panel, so I can't test the breakers.

No gen 110v at relay. Hard to believe both breakers on the unit would be bad. But IF the breakers are OK, and the gen has an output because it keeps running, shouldn't I be able to find voltage somewhere?

We never could run the microwave except on shore power. After I had new start and cabin batteries installed I had no outlet power using the gen.

I had to swap a car engine in a field once and my battery was not being charged after the engine change. I think the service station had to polarize the generator. Is this something I might have to do? Is it a DIY thing or do I need a professional?
__________________
dak605 is offline   Reply With Quote
Old 09-09-2011, 04:09 PM   #8
Junior Member
 
Join Date: Jun 2011
Posts: 18
Generator Output

I think I found the junction box after the gen control panel. With the gen running the circuits from the breakers each read 1V. Line loss would explain the .8v reading on the transfer relay. Turning off the breakers drops the voltage to 0 at the junction box.

Could the brushes be making poor contact? How can I get to them? I pulled a little plastic cover off the front of the gen and can see several white wires but can't see what they go to.
__________________
dak605 is offline   Reply With Quote
Old 09-09-2011, 10:01 PM   #9
Senior Member
 
Dave78Chief's Avatar
 
Join Date: Jun 2009
Posts: 1,513
Might be a little easier for you if you had the service manual for your generator. If you could provide the model and spec number we might be able to provide you with it.
An Emerald 1 or Emerald Plus unit would be something like 4.0BGE-1R/26109D. last letter "D" is the spec number.

A Emearld III would be something like 6.5NHE-1R/26100H ("H" = Spec H)

Microlite would be something like 4.0 KY-FA/26100K ("K" = Spec K)

Dave
__________________
Dave in Virginia
1978 Winnebago Chieftain
Dodge M400 - 440-3
Classic Winnebago Site: http://www.classicwinnebagos.com/forum/index.php
Dave78Chief is offline   Reply With Quote
Old 09-10-2011, 11:28 AM   #10
Junior Member
 
Join Date: Jun 2011
Posts: 18
Generator Output

Thanks for the assist Dave - I have model # 6.5 NHM FA/26//6H.
__________________
dak605 is offline   Reply With Quote
Old 09-12-2011, 03:39 PM   #11
Junior Member
 
Join Date: Jun 2011
Posts: 18
Generator Output

I removed the brushes and cleaned the slip rings on the gen. Using a digital voltmeter I am still reading 1.0V on the leads from the gen circuit breakers.

Any other suggestions before I head to Camping World for service?
__________________
dak605 is offline   Reply With Quote
Old 09-12-2011, 04:56 PM   #12
Senior Member
 
Fleetwood Owners Club
Join Date: May 2009
Posts: 161
There is a troubleshooting guide at

http://www.flightsystems.com/pdf/onanrvtshootgd608.pdf

I am still looking for a link to an online Cummins/Onan Maintenance Manual for the NHM. I know I have it somewhere
__________________
97 Discovery 36RS
00 Subaru
wirelessenab is offline   Reply With Quote
Old 09-12-2011, 05:12 PM   #13
Senior Member
 
Fleetwood Owners Club
Join Date: May 2009
Posts: 161
Found it as soon as I said I couldn't find it

http://www.cumminsonan.com/www/pdf/m.../965-0531B.pdf

That is the service manual. The owners manual is at

http://www.cumminsonan.com/www/pdf/manuals/965-0138.pdf

You might consider joining the Discovery Owner Association DOAI.org

Lots of stuff like this posted on their forum.

I just went through a low voltage problem with my NHM spec G although mine was 102 volts instead of 1 volt. I ended up replacing the voltage regulator and all is well now.

In your case I would check the resistance of the rotor. You are looking for 20-24 ohms to 30 ohms from brush to brush with nothing else in the circuit, ie with the brush leads disconnected. If the resistance is high you might need new brushes, or better cleaning of the slip rings, or a good general cleanup of all connection. If resistance is low that is potentially bad news.
__________________
97 Discovery 36RS
00 Subaru
wirelessenab is offline   Reply With Quote
Old 09-12-2011, 05:30 PM   #14
Senior Member
 
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 4,383
Onan's will run all day long without putting out 120 volts. They will not run if the 12volt output is down. When you press the start button down,you are using 12volts from the battery, but when you release the start switch it switchs to its own 12 volts. you should check for 120 volts at the circuit breakers input side. If you don't have 120 volts here, your generator is not making power. (I am talking about the breakers in the Generator.)
__________________

__________________
1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
ga traveler is offline   Reply With Quote
Reply

Tags
generator



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


» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:03 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.