Question about Kohler 200-Amp Indoor Automatic Transfer Switch - RDT-CFNA-0200A

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How do I set the timing on Kohler CFNA-0200A to automatically start generator weekly?

Programming/ need a manual for the above transfer switch and the Kohler 12RES-I3C1 generator

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Posted on Jan 02, 2017

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SOURCE: 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.

Posted on Apr 02, 2009

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SOURCE: Kohler 12res AC breaker flipping with no error listed

wat size c/breaker
6600 divide 240 = amp
rule of thumb

Posted on Sep 06, 2009

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SOURCE: Can some one tell me what oil and air filter to

Kohler Model 12RES generator manual calls for use of synthetic oil (Mobil 1 or equivalent) as follows: If temperature is normally above 0 degrees F, use 10W30. If temp. is normally below 32 degrees F, use 5W20 or 5W30. NAPA Auto Parts recommends their #1056 oil filter for the 12RES.

Posted on Sep 06, 2012

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SOURCE: Kohler automatic transfer switch RDT CFNA 0100B. I can set it to exercise and it will do so for several weeks then it forgets. No fault shown.

Product manual does not have troubleshoot section.
The operation might be normal, and within expected parameters, or it might have a glitch.
Suggest you contact Kohler Power directly:

Posted on Sep 30, 2012

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SOURCE: Kohler 30RZ62 generator Parts

You are going to have to register with Kohler and use this site to get your part:

Posted on Oct 08, 2012

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1 Answer

Kohler 20resal 100amp transfer switch RXT will not auto start?

Disconnect generator remote start wires in the ATS. Put an ohm meter across the remote start terminals in the ATS and kill utility power, you should here a click in the ATS and the ohm meter should indicate close to zero ohms. If it does then your ATS is fine and the problem is gen control board or wiring between the two. If it does not show that value, then the start relay in the ATS is suspect.

Feb 12, 2013 | Kohler Generator 20kw 20res W/ 200 Amp...

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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

Jan 03, 2013 | Kohler RXT-JFNC-0200A-QS 200 Amp...

1 Answer

Kohler automatic transfer switch RDT CFNA 0100B. I can set it to exercise and it will do so for several weeks then it forgets. No fault shown.

Product manual does not have troubleshoot section.
The operation might be normal, and within expected parameters, or it might have a glitch.
Suggest you contact Kohler Power directly:

Sep 29, 2012 | Kohler 100-Amp Automatic Transfer Switch ...

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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

Will not issue a start signal all of a sudden. How to test to see if it is the switch or the gen. panel

I have a Kohler 12RESM1 whole-house generator with a 200AMP RDT, MPAC 500 Automatic transfer switch (ATS) in my home. The system was installed in 2006 and has been working great since. Several weeks ago I began noticing that the weekly tests weren't occurring on schedule and that the generator would initiate a starting crank for a couple seconds several time a day. The false starts began occurring more frequently as time progressed. (BE very careful!! You will be killed if you are not careful!! ) In order to isolate the trouble between the ATS and the generator, I disconnected the 2 start circuit wires from the ATS controller (2 wires on green connector). The problem stopped, which led me to believe the problem was the ATS controller board. The controller board in my ATS is a GM35950. After removing the board (BE very careful!! You will be killed if you are not careful!! ) and doing a little troubleshooting, I determined the trouble was the set of .47F 5V super-capacitors. These are the 2 black oval-shaped cans behind the relays that appear hot-glued together. I ordered 2 new caps from Digi-key (approx. $4.00 ea). The P/N is PB-5R0V474-R. Replacing the supercaps cured the problem. Don't be fooled, these capacitors are .47 farads, not .47 microfarads, thus the reason they're called Supercaps. They function similar to a battery in this application. Oh by the way, I ordered a couple extra Caps. They have a 1000 hour life expectancy, so I suspect I'll need to replace them again in 6-7 years. Good Luck, I wouldn't advise attempting this job unless you have the proper soldering equipment and are experienced with electronic repair. There's a company that will repair the board for $170. Try googling "Kohler GM35950 repair".

Jan 30, 2011 | Kohler 200-Amp Automatic Transfer Switch...

1 Answer

How do i stop the unit from testing every week?

The automatic test cycle is done for reasons besides just checking to see if it works, it is done to keep the engine in working order. Without running it regularly, it won't be able to run when you need it. If you really don't want the generator as a backup at all, you should sell it. On the other hand, maybe it's just noisy and runs at an inconvenient time. The electrician that installed it probably left a sticker for a number to call on the generator unit itself (or the transfer switch.) for service or questions. They should be happy to answer your questions about changing the schedule of the test cycle - and if they any sense at all for customer loyalty, they will probably do it for free.

Feb 21, 2010 | Kohler 200-Amp Automatic Transfer Switch -...

1 Answer

My Kohler 17RES has stopped doing it's scheduled weekly exercise. How can I get it exercising again?

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.

Aug 08, 2009 | Kohler 12 kW Emergency Power System -...

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