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Author Topic: Onan Generator will not stay running! Service code 14  (Read 11236 times)

Ride Everything

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Onan Generator will not stay running! Service code 14
« on: April 13, 2008, 06:28:12 PM »
The generator starts, then immediately stops.  When I check the error code in my manual, which is code 14, the manual states: "OverFrequency fault. Engine governor unable to maintain rated frequency". Then says to see authorized dealer!

I just got the coach back after having my fuel station nozzle on the outside of the coach raised about two inches. The nozzle was too low from the factory and I couldn't get gas in the tank. I know for sure there's about six gallons in the tank, too.  Since getting the TT back after this repair, this was my first attempt at using the generator.  The gen works, because I used it prior to the nozzle fix.

Any ideas?  I'm sick and tired of bringing this trailer back to the dealer (which is over 8 times in the last 12 months).

Any help would be great!

Thanks,
Gary

Karl

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Re: Onan Generator will not stay running! Service code 14
« Reply #1 on: April 13, 2008, 06:57:18 PM »
Gary,

My first thoughts about this is that it's only a coincidence that you're now having generator problems; not likely that it's related to your recent service. Onan generators (and other non-inverter generators) need to maintain a certain speed to output the correct frequency. There is a 'computer' circuit board in them that does this. If it malfunctions, the generator will tend to run too fast, and the computer will shut it down to prevent over-speed. Sorry, but you need to do as it suggests and see an authorized dealer - or a trained service technician. It's a relatively easy fix. 
Karl (Cheesehead) Kolbus   Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "...holy cow ...what a ride!"

Karl

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Re: Onan Generator will not stay running! Service code 14
« Reply #2 on: April 13, 2008, 07:03:43 PM »
Gary,

A question: Will it continue to run if you hold the 'start' switch activated? Don't let it run more than a second or two if it does, but that's another symptom of a malfunctioning computer control board.
Karl (Cheesehead) Kolbus   Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "...holy cow ...what a ride!"

Ride Everything

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Re: Onan Generator will not stay running! Service code 14
« Reply #3 on: April 13, 2008, 07:13:51 PM »
Gary,

A question: Will it continue to run if you hold the 'start' switch activated? Don't let it run more than a second or two if it does, but that's another symptom of a malfunctioning computer control board.

Nope, even if I hold the start button, it still shuts down. The whole process from start-up to shut down takes about four seconds. 

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Re: Onan Generator will not stay running! Service code 14
« Reply #4 on: April 13, 2008, 07:19:13 PM »
Could the service techs have disconnected something when they fixed the nozzle and not hooked something back up? 

Karl

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Re: Onan Generator will not stay running! Service code 14
« Reply #5 on: April 13, 2008, 07:25:08 PM »
Quote
Could the service techs have disconnected something when they fixed the nozzle and not hooked something back up?
Possible, if they were working in the generator bay, but not likely. That's an internal error code. They would have had to disconnect one of the connectors. What model Onan?
Karl (Cheesehead) Kolbus   Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "...holy cow ...what a ride!"

Karl

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Re: Onan Generator will not stay running! Service code 14
« Reply #6 on: April 13, 2008, 07:27:24 PM »
Quote
They would have had to disconnect one of the connectors.
Oh yeah, that's what you said, wasn't it? Duh!
Karl (Cheesehead) Kolbus   Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "...holy cow ...what a ride!"

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Re: Onan Generator will not stay running! Service code 14
« Reply #7 on: April 13, 2008, 07:50:21 PM »
It's an Onan Microquiet 4000, and it only has about 40 hours on it so far.

John From Detroit

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Re: Onan Generator will not stay running! Service code 14
« Reply #8 on: April 14, 2008, 07:59:09 AM »
It sounds to me like a governor error,  There is a lever with a spring on it, IIRC this lever either has a serrated edge (The spring nestles in one of the serrations) or many holes (Spring hooks in a hole) and the spring may need to be moved to a different spot on the lever.  I'm not sure if it needs to be moved out or in.

you need a frequency meter, and alas, since it's never delivering power to the loads, that's hard to do

However if that's all it needs it's a very quick repair at a shop

On the other hand.. If it's something more serious you may well need professional help anyway.  So... Shop it is
Nothing adds excitement like something that is none of your business
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Karl

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Re: Onan Generator will not stay running! Service code 14
« Reply #9 on: April 14, 2008, 08:41:41 AM »
DO NOT try adjusting any part of the governor before reading and understanding THIS ARTICLE put together by a certified Onan technician. You can totally mess things up.
Karl (Cheesehead) Kolbus   Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "...holy cow ...what a ride!"

John From Detroit

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Re: Onan Generator will not stay running! Service code 14
« Reply #10 on: April 14, 2008, 02:29:37 PM »
Thanks for the link Karl.. I'm going to bookmark that

And to the OP  As I said,,,,, IF you don't have the proper tools, which I suspect you don't, it's cheaper to go to the shop. Quick job for the certified technician.

If it's something more serious, you need his help anyway

So My recommendation is to visit the shop and have them fix it.
Nothing adds excitement like something that is none of your business
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Ride Everything

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Re: Onan Generator will not stay running! Service code 14
« Reply #11 on: April 14, 2008, 11:16:09 PM »
Well, I'll take you advice and back to the shop it is.  Thanks all, I appreciate the time.  I'll post back when I hear what the resolution was.

Thanks again,
Gary

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Re: Onan Generator will not stay running! Service code 14
« Reply #12 on: May 05, 2008, 09:29:05 PM »
Hello all - well, just picked up the rig and all is fine now. Turns out I needed a new carb!  The service manager said I probably didn't run it frequently enough.  I realize the gen only has 40 hours in exactly one year of ownershipb, but to have to replace the carb all together??? Cleaning yes, replacement??  Hard to believe.  It was still under warranty so I wasn't going to argue, but with a $4,500 generator, I was very surprised at the result, to say the least.


Karl

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Re: Onan Generator will not stay running! Service code 14
« Reply #13 on: May 06, 2008, 08:26:12 AM »
Quote
I was very surprised at the result, to say the least
Don't be. Carbs are cheap but labor to rebuild one is not.
Karl (Cheesehead) Kolbus   Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "...holy cow ...what a ride!"

Mark R.

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Re: Onan Generator will not stay running! Service code 14
« Reply #14 on: May 06, 2008, 11:39:13 AM »
The generator starts, then immediately stops.  When I check the error code in my manual, which is code 14, the manual states: "OverFrequency fault. Engine governor unable to maintain rated frequency". Then says to see authorized dealer!

I just got the coach back

Did the service guys drain tank?, maybe the gas is not to the carb yet or  there is a fuel valve shut off or gas line not connected to generator / tank, maybe breaker tripped on generator for electric fuel pump!  Most engine computers ignore inputs for some period of time after start before shutting down,  this allows inputs  to stabilize, so may want to check the basics before the dealer changes the computer, air, gas, spark , one or more of these are missing!  Good luck
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Ron

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Re: Onan Generator will not stay running! Service code 14
« Reply #15 on: May 06, 2008, 03:16:17 PM »
After investing over $4000 into a genset why not use it.  The most common cause of generator malfunction results from lack of use and carb replacement is usually the fix.  Run those Gensets.  We use ours to run the roof air when AC is needed mainly because it exercises the Genset.  One might refer to this as a USE IT or LOOSE IT thing.
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dsolberg

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Re: Onan Generator will not stay running! Service code 14
« Reply #16 on: May 07, 2008, 03:47:35 PM »
In your Onan Owner's Manual it specifically states to run the genset for 1 hour on full load EVERY month!  It's becoming a real issue in the industry with the cheaper gas...cheaper meaning refined cheaper and it's not high quality stuff!  Your carb will varnish and if not using a heavy load, will carbon up and there is no cleaning...just replacing.  You should see the procedure for storing!!! Spraying Onanfoam, disconnect the gas line and running high octane gas...WOW! 

Newt & Jan

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Re: Onan Generator will not stay running! Service code 14
« Reply #17 on: May 07, 2008, 07:29:09 PM »
How much is considered "full load"?

I have a 5500 which I think is rated to handle 48 amps.  Do I need to approach that or will just an hour with both AC units be enough?
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Karl

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Re: Onan Generator will not stay running! Service code 14
« Reply #18 on: May 07, 2008, 07:35:27 PM »
Both a/c units will be just fine - even more than required. The idea is to draw enough to not only clean the slip rings and brushes, but to get it hot enough to evaporate any moisture present, especially in the windings.
Karl (Cheesehead) Kolbus   Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "...holy cow ...what a ride!"

Newt & Jan

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Re: Onan Generator will not stay running! Service code 14
« Reply #19 on: May 07, 2008, 07:45:48 PM »
Thanks dsolberg & Karl.

I think this topic just saved me some money.  I've been running mine but only with a minimal load.
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dsolberg

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Re: Onan Generator will not stay running! Service code 14
« Reply #20 on: May 08, 2008, 10:17:52 AM »
Also, another little trick we found is priming the unit with the start switch.  Onan has a 2 second prime feature, press the start/stop button to the stop side for 2 seconds, the light will come on, then press start and it fires right away!  Plus check to make sure the altitude lever is set correctly.  This is located just above the oil dipstick.


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Re: Onan Generator will not stay running! Service code 14
« Reply #21 on: May 09, 2008, 07:14:59 PM »
Yup on the priming.  Our remote switch even has the position labeled stop/prime for non-tech folk like me.
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Re: Onan Generator will not stay running! Service code 14
« Reply #22 on: May 09, 2008, 11:16:34 PM »
After investing over $4000 into a genset why not use it.  The most common cause of generator malfunction results from lack of use and carb replacement is usually the fix.  Run those Gensets.  We use ours to run the roof air when AC is needed mainly because it exercises the Genset.  One might refer to this as a USE IT or LOOSE IT thing.

Yep, you're right.  The hours I did use were essentially done in one winter season at the desert. The rest of the year we stayed in places with full hookups.  I have motorcycles, etc that sit during the off-season with no problems so I guess I thought this would be the same deal.

Got lucky this time but definitely learned my lesson. Thanks all!

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Re: Onan Generator will not stay running! Service code 14
« Reply #23 on: March 31, 2009, 11:30:30 PM »
Hey all - just wanted to give an update on my gen situation.  All seems to be ok now.  Whenever we go out, I run, run, run this thing.  I put 40 hours on the first year, and another 100 the second.  I let the thing run ALL day now, whether I really need to or not.  It seems to enjoy it!!

I still get the error code of 14 when I shut the unit off (after running a long time), then trying to restart the unit several minutes later.  If I wait about 15 minutes or so, all is good. 

I wonder if this is normal????