Kohler 14res Generator Manual
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Wayne thanks - I am using a digital meter. I found out that there is a Silicon Controlled Rectifier device inside the generator controller box. This device is controlled by the main computer and is used to adjust the output voltage of the generator. I pulled the unit and ran through a series of tests using a procude I found in a Kohler Marine Generator service manual that happens to use the same type of ADC contoller that is in my unit. My SCR unit failed one of the test steps - so I ordered a new part. The service manual said to check this device (plus fuses) before replacing the main computer.
I am hoping this 50 dollar part fixes the problem. Once I get the part installed and tested, I will post the results. I will also check all winding and controller cables to make sure none have vibrated loose. Along my searches on-line, I found a great source for Kohler generator parts: (or ASAP parts) I was able to order the SCR as well as a Service Manual for the Kohler 12RES generator which I have been looking for quite some time. Once I get that manual I will be able to perform more detailed troubleshooting and maintainence. It seems like Kohler works extra hard to prevent the DIYer from doing anything more than changing oil and filters on the residential generators.
The problem I have found is that the authorized Kohler service companies in my area charge exorbitent rates to come to the house just to look at the box, let alone repair it. Even if the SCR isn't the issue, I want to pinpoint the problem so if I need to call in a service company I can tell them exaclty what the issue is. I replaced the SCR module but that did not fix the problem. I also checked all wire connections and fuses again and found nothing wrong. I decided to call an authorized Kohler service company and they are coming Monday morning to look at it.
It is very odd that the ADC controller on the unit is not sensing an under voltage condition and issuing an alarm code, yet the transfer switch controller is sensing the wrong voltage and is issuing the stop. I am wondering if the ADC controller on the generator is bad. I don't remember what the readings were after I installed the unit and did the startup checks. I too am having the same issue with my unit.
Kohler Generator 14resal Installation Manual
When I press the switch below the red flashing LED on the ATS panel there is no response. If I trip the whole house master breaker the generator started and ran normally but would not shut down once I reset the whole house breaker. I had to switch the Generator set master switch on the outdoor unit to stop the engine. I can manually start the unit with the 'Generator set master switch' on the outdoor unit. I am not sure what to check now? I am about 3 hours from the nearest service center so I am hoping to resolve the issue without a service call.