Question about Kohler Generator. 12 kW and 14 kW Home Standby Generator Maintenance

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I have a Kohler 12 RES home standby generator. Once in a while when the power goes out the generator will start and then immediately shut down with no fault codes. When I flip the control in the unit

Unit runs fine during it's weekly tests. Checked and oil is full, I have an OEM filter installed. Unit runs on propane. The utility power is typically of for about 10 seconds before it restores. This problem has only happened twice in 2-1/2 years

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Renee F

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  • Kohler Expert
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Check the inlet fuel pressure, on exervise there is no load, when power is out it is loaded and demands more fuel. Also check for bugs blocking gas regulators vents etc

Posted on Nov 22, 2013

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5 Related Answers

Anonymous

  • 37 Answers

SOURCE: When I try to start my generator the code oc comes

Check battery volatge while you are cranking engine if voltage drops below 9 vdc you have a bad battery. If it doesn't you probable have a bad starting solenoid or a bad ground at the starting solenoid.

Posted on Nov 18, 2009

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Anonymous

  • 1 Answer

SOURCE: Kohler confidant 4 generator will not run.

i got the same gen and with the same problem
mike

Posted on May 06, 2010

Anonymous

  • 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

Anonymous

  • 3 Answers

SOURCE: My Kohler 11RMY (40 amp) standby generator will not start

If the engine does not turn over check for the obvious , dead battery or blown fuse or fuses on the control board.

Posted on Jan 04, 2011

noman_att246

  • 2 Answers

SOURCE: The monitoring system of our Kohler propane

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 corrected?

Posted on Jun 02, 2011

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Kohler Generator issue 20 RES - YouTube

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1 Answer

12 RES - Control Panel Dead With New Battery


If it won't start in manual, you have a short and/or a bad control board. Make sure battery polarity is correct, did you disconnect battery charger before removing old battery? If not charger can push DC volts over 20V and can damage control board.

May 26, 2013 | Kohler Electrical Supplies

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Kohler 12 RES - Unit fails to start occasionally. Attempting a manual start by placing switch in run position, cause a loud click, but no cranking. The panel says CC. This morning I put a jump start...


I finally solved the intermittant starting problem on my Kohler 12 RES by replacing the strater and the starter relay. I was also experiencing the occassional OC indication, red blinking LEDs on the ATS, and intermittent non-starts during the weekly exercises. The problem happened during power outages a couple times also. If I flipped the start switch between auto and run quickly the generator would occasionally start. Once started, the generator runs fine. I ordered a new starter, which included the starter solenoid. By the way, don't worry about the genuine part thing..the old starter was a Delco made overseas. I ordered a new starter online for $85 (6744N) and it was indentical to the genuine Kohler starter. Replaced the starter and it improved the problem but did not totally solve the intermittent starting. Ordered the starter relay (GM49746) replaced it and the problem is solved.

May 09, 2012 | Kohler 12 kW Emergency Power System -...

1 Answer

Kohler 12K RES where are links for the installation /setup of the controller? thanks


The 12RESL has no user setup. That's part of lower cost on the DC 2200 controller versus an ADC 2100 or ADC-RES controller that came with the 12 / 17 / 18 RES models. Here is a link for the ADC 2100 Operation / Installtion manual though. http://www.scribd.com/doc/60318571/Kohler-8-5-12RES-Install

Sep 14, 2011 | Kohler 12 kW Emergency Power System -...

1 Answer

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...


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 corrected?

May 28, 2011 | Kohler 12 kW Emergency Power System -...

1 Answer

Kohler Model 12RES LP gas generator starts normally but immediately shuts down with over-voltage alarm. Control panel replaced.


Sounds like a short in one of the windings to me. Can you verify that the engine rpm is not exceeding specs? If you can modify the engine speed Id say slow it down and see what the voltage read is.

Jul 22, 2010 | Kohler 12 kW Emergency Power System -...

2 Answers

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

Feb 18, 2010 | Kohler 12 kW Emergency Power System -...

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