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 > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
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 07-12-2022, 11:34 AM   #1
Junior Member
 
Motorosi's Avatar
 
Join Date: Jul 2022
Location: Miami, FL
Posts: 7
Onan 4000 main breaker constant trip

Hello guys-
Onan4k. Start the gen with all breakers off inside. Breaker off outside (on the gen) and she starts fine, I flip the outside breaker on and immediately she powers down. Like a safe mode. I unplug the only plug I see on top of the board going out to the rv itself. Same problem. I slide out the plate with the breaker on it. No pinched wires. The white wire coming in has 120v. I believe 60HTZ. Now the black wire going out is my problem. I unplug that from the other side of the breaker. All is fine. Obviously. Breaker on/off. All good. No power. Turn off. Plug back on, back to step one. I changed the breaker. Same problem. I try to trace that wire, goes by Nader the board. I didnít remove the board. Donít want to damage it. Shore power works fine. Iím missing something here.
Thanks in advance friends.
Craig
Motorosi 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 07-12-2022, 11:50 AM   #2
Senior Member
 
hilgert's Avatar
 
Join Date: Nov 2014
Location: Somewhere
Posts: 825
First, welcome!!!

Second, *please* create a signature with your RV year, make and model. That way folks with similar RVs might chime in with similar issues. You can create a signature here:
https://www.irv2.com/forums/profile....=editsignature

Third, your problem. Sounds to me like the generator has no issues...it sounds like there is something else going on downstream in the RV. Did you have shore power disconnected when you tried the generator? If shore power was not disconnected, please disconnect and try the generator again and report back with results.
__________________
2019 Fleetwood Discovery LXE 40D
2017 Ford F-150 LTE FX4 SuperCrew Towed
Full-Timers since 2018
hilgert is online now   Reply With Quote
Old 07-12-2022, 11:55 AM   #3
Junior Member
 
Motorosi's Avatar
 
Join Date: Jul 2022
Location: Miami, FL
Posts: 7
Copy. Doing all that now.
This is a 2019 Forest River 20cb. Ford transit chassis.

I had NO shore power connected. I have pics and videos. Let me see if I can upload. If not in the gen, then that black wire coming out of the breaker is the culprit. But it goes under the board to the left. Or inside it.
Motorosi is offline   Reply With Quote
Old 07-12-2022, 12:17 PM   #4
Senior Member
 
hilgert's Avatar
 
Join Date: Nov 2014
Location: Somewhere
Posts: 825
Quote:
Originally Posted by Motorosi View Post
...
I slide out the plate with the breaker on it. No pinched wires. The white wire coming in has 120v. I believe 60HTZ. Now the black wire going out is my problem. I unplug that from the other side of the breaker. All is fine.
...
When the generator shuts down it should remember the fault code, which will be displayed on the generator via the blinking light on the start/stop switch. Look in your Onan manual (or find online) for Troubleshooting, and it will tell you how to read the codes (you count the first set of blinks, then the second set of blinks), which tells you the code. This will help diagnose the issue.

I am suspecting this might be an issue with your ATS (automatic transfer switch), but that's a wild guess at this point not yet knowing the fault code.
__________________
2019 Fleetwood Discovery LXE 40D
2017 Ford F-150 LTE FX4 SuperCrew Towed
Full-Timers since 2018
hilgert is online now   Reply With Quote
Old 07-12-2022, 12:38 PM   #5
Senior Member
 
Join Date: Jul 2014
Posts: 32,664
Look for a juntion box near the generator. Some have wire nuts that fall off and short.

A Onan generator will automaticly shut down if it detects a shore circuit.
twinboat is online now   Reply With Quote
Old 07-12-2022, 01:05 PM   #6
Junior Member
 
Motorosi's Avatar
 
Join Date: Jul 2022
Location: Miami, FL
Posts: 7
Nothing next to the gen. Goes straight to the panel inside. Iíll upload a picture. Fault code 27.
Motorosi is offline   Reply With Quote
Old 07-12-2022, 01:07 PM   #7
Junior Member
 
Motorosi's Avatar
 
Join Date: Jul 2022
Location: Miami, FL
Posts: 7
Click image for larger version

Name:	IMG_9084.jpg
Views:	51
Size:	209.8 KB
ID:	370831
Click image for larger version

Name:	IMG_9087.jpg
Views:	17
Size:	230.2 KB
ID:	370832
Click image for larger version

Name:	IMG_9082.jpg
Views:	17
Size:	311.1 KB
ID:	370833
Motorosi is offline   Reply With Quote
Old 07-12-2022, 01:17 PM   #8
Senior Member
 
hilgert's Avatar
 
Join Date: Nov 2014
Location: Somewhere
Posts: 825
From somewhere online...

Code 27 - Voltage Sense Error
What this fault code tells you is that the controller cannot sense the output voltage. Again, this problem may be beyond your expertise to repair. The manual states that the only solution is to go to your authorized Onan dealer to rectify the issue.


Motorosi, in the picture (below) the connector does not look like it's fully connected...I'm hoping you had just removed it and had not yet reinserted it when the picture was taken???

__________________
2019 Fleetwood Discovery LXE 40D
2017 Ford F-150 LTE FX4 SuperCrew Towed
Full-Timers since 2018
hilgert is online now   Reply With Quote
Old 07-12-2022, 01:20 PM   #9
Junior Member
 
Motorosi's Avatar
 
Join Date: Jul 2022
Location: Miami, FL
Posts: 7
Yes. Exactly right. I was separating the gen from the rv completely. See if the breaker would stay on. No luck. Click image for larger version

Name:	IMG_9100.jpg
Views:	15
Size:	265.1 KB
ID:	370837
Click image for larger version

Name:	IMG_9097.jpg
Views:	16
Size:	296.2 KB
ID:	370838
Click image for larger version

Name:	IMG_9091.jpg
Views:	17
Size:	356.1 KB
ID:	370839
Motorosi is offline   Reply With Quote
Old 07-12-2022, 01:24 PM   #10
Junior Member
 
Motorosi's Avatar
 
Join Date: Jul 2022
Location: Miami, FL
Posts: 7
That black wire coming out of the breaker is the problem. I disconnect that and the gen runs with the breaker on or off.Thatís the feed out of the breaker. I tried tracing it, itís in a split loom tubing by itself and goes under the control board to the left. Does not come out of the gen. Iím assuming one of those wires in that plug is carrying the power? Only mother wire in a gray conduit is a orange Romex all the way to that box (in picture) on top of the panel in the rv.
Motorosi is offline   Reply With Quote
Old 07-12-2022, 01:31 PM   #11
Senior Member
 
hilgert's Avatar
 
Join Date: Nov 2014
Location: Somewhere
Posts: 825
Google "Onan fault code 27" and you'll find lots of links with some potential causes/solutions (some not requiring an Onan service facility).

Here is one example (on this forum in fact) where the cause was a chafed wire, solved with some wire shrink wrap (see last post):

https://www.irv2.com/forums/f54/onan...-a-358175.html

.
__________________
2019 Fleetwood Discovery LXE 40D
2017 Ford F-150 LTE FX4 SuperCrew Towed
Full-Timers since 2018
hilgert is online now   Reply With Quote
Old 07-12-2022, 01:33 PM   #12
Junior Member
 
Motorosi's Avatar
 
Join Date: Jul 2022
Location: Miami, FL
Posts: 7
Let me check that out. I appreciate it. Sorry for the typos. In the heat with this small phone phone my wife got me. Lol.

I kinda want to lift the board up and take a peek. Never messed with one before.
Motorosi is offline   Reply With Quote
Old 07-15-2022, 12:47 AM   #13
Senior Member
 
Join Date: Apr 2022
Posts: 519
Either the circuit breaker itself needs replacing or the voltage regulator.
__________________
94 Southwind Storm 28ft - 454TBI w/4L80E
VIN#1GBJP37N4R3314754
Flight System G-Man 360 generator man (PM me)
1972VWbus is offline   Reply With Quote
Reply

Tags
breaker, onan



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
Onan generators all constant rpm? Kahoona Class A Motorhome Discussions 23 05-05-2019 10:34 AM
Onan RV QG 4000 breaker trips only when hot under A/C load docg2 RV Systems & Appliances 4 09-09-2014 10:12 AM
Onan constant code 44 milasman RV Systems & Appliances 9 06-01-2014 09:44 PM
Onan 4000 circuit breaker bad? Jerry J Winnebago Industries Owner's Forum 5 05-02-2008 06:22 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 12:19 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.