Question about Kohler Electrical Supplies

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Plz I need help my gen is kohler 20efozd 1-************. It displays c.c then overcrank o.c. Plz where could be the fault

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  • Kohler Master
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The engine is failing to run after a commanded start. Repeatedly.

Posted on Apr 19, 2019

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SOURCE: UU undervoltage kohler 20kva

call koler but ui think is meant high heat as in the thermal circut is shuting you down or low oil
could be a couple of things best bet call kohler

Posted on Aug 06, 2009

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Overcrank alarm is coming because the unit failed to start

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Kohler RXT won,t start Kohler 20resa


Did you check the remote terminals and relay in the ATS, disconnect gen remote wires, kill the ATS brealer and ohm across the start terminals, they should close, if not a relay/control board issue, if they do fault is in wiring or gen control, or incorrect wiring

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My 3.5 kw kohler marine gen starts and shuts right off throwing code uu (under voltage) last season it did this and sometimes showed loc (loss of coolant) but never appeared low or showed sign of coolant...


Check that when you run it, it is not in fact making correct voltage (within about 10% is good), also make sure the engine is coming up to full speed, 3600 or 1800. You could check this with a multimeter that measure hertz. On the main output leads when the genset is running make sure it is getting close to 60 hz. or if you are in an area that uses 50 hz. check for that respectively. There are a couple things that would affect this, one would be your SCR module. There is a test procedure for this which you could find here. http://www.scribd.com/doc/50171916/tp6196-1 . I don't work on marine units, mostly standby so these manuals are for residential. Check your fuses, could even go as far as checking the wiring in the back and wiring and condition of the brushes and sliprings. These actually build field voltage to make 240 or 120 volts whatever your unit is configured to make. The brushes need to sit flat on the slip rings and on a unit with 10 hrs. the sliprings I can't imagine would be very dirty but check that as well. If you have an ADC2100 controller use this manual to go into the controller to verify that it is set for the correct voltage that the machine is built to make. The only other fairly simple thing to check that I've had issues with is if Kohler mounted a fuse block on the side of the cabinet mounted to the genset with no vibration isolation. Check these fuses while attempting to run the unit and make sure you getting steady voltage out of them as sometimes they will vibrate causing pulsed voltage to come out of them and can give you an intermittent UU, UF, or OC fault (undervoltage, underfrequency, overcrank).

Jul 13, 2011 | Kohler 12 kW Emergency Power System -...

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The generator has stoped working after runing about 9 hours


Check what fault was logged on the controller and address the fault from there. Also note that the generator will not operate automatically at all if it is out on a fault until the problem is addressed and the unit is reset and put back in automatic. On the 18 open the top cover and the fault should show up as a 2 digit abbreviation and the definition will be defined just below it on the sticker.Such as OC is overcrank which means it tried to started but failed possibly due to lack of fuel or LOP is low oil psi, usually means it burned all the oil out of the crankcase.

Jul 12, 2011 | Kohler 18RESL 18 kW Emergency Power...

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.

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I have a Kohler generator set model KT17 that was not run for several years and was full of old gasoline. It would not start at all so I replaced plugs, cleaned fuel pump & filter, then cleaned carb...


Check the genset controller for a fault, low oil psi, no output voltage, overspeed, overcrank / no crank disconnect signal / starter staying engaged, high engine temp.

Jun 26, 2011 | Kohler Electrical Supplies

1 Answer

UU undervoltage kohler 20kva


call koler but ui think is meant high heat as in the thermal circut is shuting you down or low oil
could be a couple of things best bet call kohler

Aug 06, 2009 | Kohler 12 kW Emergency Power System -...

2 Answers

Overcrank error message


The 'overcrank' error simply means it tried to start but never actually started. It cranked for an extended period. Check the fuel and starting issues you would normally check to start the engine.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

Mar 31, 2009 | Kohler 12 kW Emergency Power System -...

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