Kohler 200-Amp Automatic Transfer Switch w/ Service Disconnect - RDT-CFNC-2 - Answered Questions & Fixed issues
Will not issue a start signal all of a sudden. How
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".
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...
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Answered
on Oct 12, 2022
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382 views
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...
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Answered
on Sep 20, 2022
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71 views
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...
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Answered
on Aug 31, 2022
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306 views
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