Kohler 12 kW Emergency Power System - 12RES-L - Page 4 - Answered Questions & Fixed issues

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Kohler 12res AC breaker flipping with no error listed

wat size c/breaker
6600 divide 240 = amp
rule of thumb
9/6/2009 5:30:10 AM • Kohler 12 kW... • Answered on Sep 06, 2009 • 369 views
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UU lowvoltage error code residential generator

Could be the battery voltage. If your battery is not charging properly, the controller on the unit can do some funky things! Exactly how long does it run for? Is this in auto or manual mode?
9/4/2009 10:43:30 PM • Kohler 12 kW... • Answered on Sep 04, 2009 • 2,640 views
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Need info on installing circuit

Gotta be more specific! What kind of info do you need?
9/4/2009 10:41:46 PM • Kohler 12 kW... • Answered on Sep 04, 2009 • 114 views
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My Kohler 17RES has stopped doing it's scheduled

On your Automatic Transfer Switch ( the little gray box you see on the right in the picture above) you have two blue buttons. One is a Manual test switch. The other has a clock on it and this is your exercise set button. Hold it down for a FULL 3 seconds if you want it to excercise without a load (not powering your home) Hold it down for a FULL 6 seconds if you want it to exercise with a load every week. Your generator will start and run for 20 minutes, and then shut down. Now every week your generator will exercise at the time and day that you pushed the set button.
9/4/2009 10:35:14 PM • Kohler 12 kW... • Answered on Sep 04, 2009 • 1,562 views
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OC symbol appears and won't turn over

won't start fire
9/4/2009 10:26:51 PM • Kohler 12 kW... • Answered on Sep 04, 2009 • 693 views
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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
8/6/2009 4:02:35 AM • Kohler 12 kW... • Answered on Aug 06, 2009 • 2,971 views
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What is the relationship between size of cable and

Wire size is similar to water hose, the smaller the hose, the less water that can pass through it. Wire is same principle, the smaller the wire, the less current able to pass through it.
7/11/2009 1:00:15 PM • Kohler 12 kW... • Answered on Jul 11, 2009 • 92 views
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Electrical cable size requirement

This is an answer to your question only. The safest thing to do is hire an electrician to do it. There may be factors you don't recgonize that a skilled eye would pick up on.

The proper size wire is #4 copper or #3 Aluminum. THHN is the most common and most versatile type in conduit. a #6 ground wire is ok. Stranded pulls a lot easier than solid and do yourself a favor and buy some wire pulling lubricant just in case.
Make sure to obey all manufacturer's instructions. If you use aluminum make sure to place anti-oxidation compound or Nolox on your lugs in the panel. Please write back with anymore questions.
4/2/2009 2:49:41 AM • Kohler 12 kW... • Answered on Apr 02, 2009 • 526 views
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Running when in standby mode

Are you sure this is not normal?

Read your manual.

Most of the larger generators do a test run once a week or so to make sure everything is working ok in case of a power falure.


1/14/2009 3:12:04 AM • Kohler 12 kW... • Answered on Jan 14, 2009 • 249 views
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How to wire a Kohler generator starter

8/5/2023 12:31:54 AM • Kohler... • Answered on Aug 05, 2023 • 41 views
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Kohler 14RESA Generator. Emergency Stop Shutdown Error that will not clear

3/24/2023 4:58:06 PM • Kohler... • Answered on Mar 24, 2023 • 50 views
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My Kohler 35RZ generator Auxiliary Faults on startup after a rain storm. It Otherwise starts right up and runs. .

That is the specific use of WD40. Spray it when it is warm and the kerosene will evaporate and leave the waxy protective coating behind.
1/25/2023 11:41:58 PM • Kohler... • Answered on Jan 25, 2023 • 84 views
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Kohler 14resa gen just stopped running no spark, changed out ign coils still no spark.

not car moved yah lost the users manual??? in it is the schematic, and on said schematic is what kills spark dead. 1: oil switch bad. 2:kill switch bad. 3: wires too those cut or shorted. it's all there to read, ask maker for the lost manual
12/11/2022 6:48:59 PM • Kohler... • Answered on Dec 11, 2022 • 64 views
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I have a Kohler Model 4.5 CKM 21-rv How do you check the voltage regulator # C 239311

Don't think you can check the avr it's self (capacitors you can) there are continuity tests you can do to the windings of the generator to determine a fault with that if that all checks out ok the avr is at fault
11/12/2022 8:28:44 PM • Kohler... • Answered on Nov 12, 2022 • 96 views
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I have a generator 55kv hi volt 460 what is the problem

depending on the machine Could be the Rpm to high
11/12/2022 8:20:43 PM • Kohler... • Answered on Nov 12, 2022 • 35 views
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What is the fix for a locked Rotor code on my Kohler 14 RESA generator?

Hi, if possible please check your speed sensors within your generator to make sure each is still functioning properly. Otherwise, you might have to replace the sensors before the code goes away. Thank you.
10/20/2022 11:21:08 PM • Kohler... • Answered on Oct 20, 2022 • 362 views
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Aux fault on Kohler generator 5ekd says 17.0 fault check engine

More supports or if you consider diesel generator set in furture, please contact [email protected], or visit at: www.dieselgeneratortech.com
10/12/2022 3:12:06 PM • Kohler... • Answered on Oct 12, 2022 • 853 views
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Kohler 5ecd generator giving high battery voltage alarm

Fault code is displayed if the engine starting battery voltage rises above 16 VDC for a 12 VDC system or above 30 VDC for a 24 VDC system for more than 2 seconds when the engine is not running. This fault condition does not inhibit engine starting. The fault condition clears when the battery voltage returns to a voltage within the limits for more than 2 seconds Check the battery rating and condition.
10/12/2022 2:42:21 PM • Kohler... • Answered on Oct 12, 2022 • 382 views
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I have a kohler 5E generator has SPARK only on one side

Kohler 5e Marine or mobile/Generator?????? working on this lacking a meter and manual. ? working blind I call it. not good that ever. call for help: it has 2 coils, 2 sparkplugs 2 HV wires to fail, (1 of them) and 2coil igniter we use and ohmeter to the bad coil. primary is of coil (ignitor end) is about 5 to 12ohms. (infinity bad) secondary coil is high ohms 1000 to 10000, par, infinty bad. the HV lead is used to measure secondary to coil core metal the HV lead can fail too. making coil useless. and last a bad ignitor , the 2 coils are same P/N so can be swapped and if failure move to other plug, bingo for bad plug , otherwise bad ingnitor box.
9/20/2022 2:15:49 PM • Kohler... • Answered on Sep 20, 2022 • 71 views
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Kohler House Generator powers up when our electricity goes out but then powers right back down?

That is an engine running issue, not a battery issue. :>D The first thing to check would be fuel supply. Can you start up manually and keep it running. If you can, it is the contactor that senses your loss of mains power and switches the generator on. It is not maintaining the connection, or is is misdiagnosing the power from the generator as power from the mains.
8/31/2022 11:40:03 PM • Kohler... • Answered on Aug 31, 2022 • 306 views
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