Community Forums

readysplit · 02-21-2023, 10:48 AM

I think I messed up big I was plugged in to shore power and was going to exercise gen forgot A C was on not sure but i think i heard a noise now gen starts but shuts right off its a 8000 onan qd with the gen breaker off getting code 11 with the breaker on getting code 15 has this happen to anyone else any suggestions would be appreciated thanks model 8HDKAK-1046K

hilgert · 02-21-2023, 11:13 AM

Code 11 is overcurrent (too much current draw for the generator to provide), so it shuts down.

Flip the generator breaker (on the generator) to OFF, then start it up again.
If it runs for a minutes or so (does not stop) then you are attempting to pull too much power from the generator.
If it still stops, there is either a short somewhere (hopefully not inside the generator) or you have too many things turned on (A/C units, water heater electric element, etc.).

Code 15 is underfrequency. Perform the same steps as above, as the cause may be the same.

From the limited description it sounds to me like there may be an issue internal to the generator (but that is just a guess).

Here is a link to what is close enough to the manual for your initial diagnostic purposes (fault codes start on page 71):

https://rockymountaingeneratorsupply...e%20Manual.pdf

Gary RVRoamer · 02-21-2023, 12:57 PM

One basic test would be to turn off main (50A) breaker inside the coach and then fire up the generator with the gen breaker on. In theory, that limits the power to the generator itself, the ATS and the wiring to the load center. If it still throws an error code, you have narrowed down the scope to either generator or some small amount of wiring.

shootist · 02-21-2023, 03:30 PM

Disconnecting the 12v at the rear of the gen will reset the board. Leave them off for 20 minutes.

readysplit · 02-22-2023, 11:53 AM

thanks everyone i tried suggestions i also disconected anything going to coach from generater and it still only starts and runs about a second basicly fires off then dies going to try fuel filter but not hopeful thanks again

THenne1713 · 02-23-2023, 12:07 AM

BTW, YOU DID NOTHING WRONG, it broke and you were the victim of the breakdown. It should work without issue while still plugged in.

LOW OIL will cause immediate shutdown, as will CLOGGED OIL FILTER. CHECK OIL LEVEL?

twinboat · 02-23-2023, 02:46 AM

Do you have more then 1/4 tank of gas ?

It needs to.

Toribk · 02-23-2023, 02:47 AM

Also check your fuel level.

The generator will not run below a quarter tank of fuel in the coach.

readysplit · 02-23-2023, 08:53 AM

thanks every one i also changed fuel filter diconected all wires going to rv still same thing need a good tech guy any suggestions i am in arcadia fl 34266 have to head north in april thank you ps laptop died in the middle of this on new 1 now lol

Rob_M · 02-23-2023, 11:48 AM

Quote:

Originally Posted by readysplit

thanks every one i also changed fuel filter diconected all wires going to rv still same thing need a good tech guy any suggestions i am in arcadia fl 34266 have to head north in april thank you ps laptop died in the middle of this on new 1 now lol

Lol stop breaking stuff!

A bad coolant or oil level sensor will shut it down also. You’re sure both are full?

readysplit · 02-23-2023, 01:54 PM

thanks to every one i guess start checking the least expensive sensors first before a new board keep u posted

ptl · 02-23-2023, 02:41 PM

I know this is a diesel but I had a gas 5500 that would start and run until you let go of the start button. It was the control board that was bad.

153stars · 02-23-2023, 05:17 PM

The repair diognostic manual has troubleshooting flow charts and fairly easy to understand tests. Flightsystems Inc. Is a generator support site, that has similar tests. They sell and repairs boards and have specific tests to help keep you from sending them good boards for repairs.