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I have a Kohler 10RY propane generator, 10 yrs old. Starts and runs for 10 seconds or so then revs erratically before throwing out a fault..probably an overspeed fault. Has done this intermittently for a few weeks. Now it faults all the time. Recently did valves, plugs and wires, any thoughts? I'm off grid and use the G most days for up to an hour. Valve adjustment and plugs and wires were done since this problem started and the unit has run since that work.

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Posted on Jan 02, 2017

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SOURCE: kohler 12kw generator starts but shuts down after 3sec

try to unplug the device and then again plut it after some 5 minites and reset it.

Posted on Oct 09, 2008

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protek480
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SOURCE: unit shuts down from overspeed fault

The engine throttle control is out of adjustment. It needs to be set based on the generator frequency
(60 Hz).

Posted on Jun 27, 2009

  • 3 Answers

SOURCE: I have a Kohler 12RESM1 propane generator with oc/uu code

I am getting the same exact problem and errors with my 12RES Kohler generator. It will try to start using a remote switch but fails. Then it will start using the switch at the generator. The error code it comes up with using the remote start switch is usually OF or UU. It is less than a year old. Can Kohler Help??? Dave R.

Posted on Feb 20, 2010

  • 1 Answer

SOURCE: Generac Guardian 15 kw overspeed fault

Did you remember to set the overspeed shutdown threshold on the control board?

Posted on Jun 07, 2010

  • 2 Answers

SOURCE: I have a new Kohler 12kw res generator on propane - backfiring

did you put the propane orifis in and unplug the spark wire

Posted on Sep 20, 2010

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1 Answer

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Aux fault can be many things, if it failed to start you may get it. Try reseting and manually starting. See if it re-occurs while it is running or does it ever start and give error. I have seen this generator by a coolant level sending it is an auxillary fault

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The monitoring system of our Kohler propane generator has sent a "UU" message. What does this mean as it causes the generator to shut down 10 seconds after starting? Also how can this be...


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I have a new Kohler 12kw res generator on propane - backfiring


Is the outside air temp cold. These generators will backfire if it is real cold and if the propane pressure is low. It is suppose to be 11 to 12 inches of water colume at the generator fuel input. drygwals

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I have a Kohler 12RESM1 propane generator with oc/uu code


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8 Answers

Kohler 12kw generator starts but shuts down after 3sec


Your gas pressure is too low and you may not have a large enough supply pipe. You need at least 10 inches of water column with the engine running to operate an LP vapor fueled engine. Because the engine is starving for fuel, its governor opens the throttle to WOT (so it goes to high revs) but there isn't any fuel to make horsepower with so the output voltage falls and the undervoltage alarm trips.

Carl

Oct 09, 2008 | Kohler 12 kW Emergency Power System -...

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