Question about Kohler Electrical Supplies

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Kohler 12.5 res gen. Battery is good. Get OC code. If I reset auto switch by clicking off, then clicking run, then clicking auto it will start. Any thoughts on this issue?

Posted by Keith Bellinger on

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Renee F

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  • Kohler Expert
  • 573 Answers

OC is Over Crank which generally means it cranked and cranked and failed to start. Turning the switch off and on again is the way to clear the fault. How long is it taking to start whilst cranking? It should start within 8 seconds

Posted on Nov 17, 2013

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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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Freddy E.

  • 2 Answers

SOURCE: 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 star

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.

Posted on Jun 23, 2012

Steve

  • 12 Answers

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

U need to make sure that the relay driving ur auto start stay closed all thru the crank cycle.

Posted on Nov 30, 2012

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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

1 Answer

Kohler 12RES only starts on second try


Check gas pressure. Oc is over crank. Means tried to start but did not.

Nov 25, 2012 | Kohler 12 kW Emergency Power System -...

1 Answer

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

My gen starts and runs for 1 min or so then dies restarts then dies again and again. if i start it under load ( turn on air con) it will run for 10 min then die allen


Is there a fault?? All UL listed generators including Kohler are required to lockout on a fault on shut down. This really sounds like a problem with your 2-wire auto start connection between your automatic transfer switch and genset. RDT model automatic transfer switch it is the 2 middle wires on the green connector and terminals 3&4 in the generator. close to run and open to shut down. Any open at any time will cause the unit to shut down. The 12 will shut down instantly upon an open because your 5 minute cool down is built into the transfer switch.

Jun 27, 2011 | Kohler 12 kW Emergency Power System -...

1 Answer

Generator won't start. Screen showing OC.


OC means OVERCRANK safety circuit stopped the auto start-up so you wouldn't burn up the starter. There is a reason the generator didn't start. Low battery, not enough fuel pressure, clogged air filter, bad starter... You just have to eliminate as many as you can visually. Rebooting the generator should clear the OC condition and you can try to start it manually.

Oct 11, 2010 | Kohler 12 kW Emergency Power System -...

2 Answers

Have Kohler 12RES. Gives a CC1 code thenan OC code. Have checked out the starter, it's OK, have cleaned all ground cables and connections and had the battery tested it's OK. Where do I go next?


check your load wires there probaly reversed. I had the same problem friday. The week before the electrican wired it. did the same cc1 then oc. had a generator company come out it was the wireing. my load and netural were reversed.

Sep 07, 2010 | Kohler 12 kW Emergency Power System -...

1 Answer

Kohler generator drains battery while running and then shuts down with error code oc


The rpm sensing in the control module is missing or bad.
Answer these questions for more details:
  1. Does your generator output normal voltage?
  2. Is the starter turning after the Gen is running?
  3. Is the charging of the battery connected?

Jun 20, 2010 | Kohler Electrical Supplies

2 Answers

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


U need to make sure that the relay driving ur auto start stay closed all thru the crank cycle.

Feb 04, 2010 | Kohler 12 kW Emergency Power System -...

1 Answer

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.

Nov 11, 2009 | Kohler 12 kW Emergency Power System -...

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