On the covered Kohler standby generator, Advanced Diagnostic means shutdown during the reduced-speed portion of an exercise. The engine then restarts, runs at full speed for two minutes and stops; the controller returns to AUTO and the exercise schedule is unchanged. First, open the event history and confirm it shows Advanced Diagnostic Active.
Try in this order
0 of 3 completedWhat to do first
ReversibleOpen the event history and confirm it shows Advanced Diagnostic Active.
Correct only the documented fault domain
ReversibleIf the set does not restart and return to AUTO, Kohler directs checking for other faults that prevent operation.
Note the message and the conditions
ReversibleWrite down the exact message, the date and time and the loads running, then contact a Kohler dealer with the model and serial number from the nameplate.
Evidence ledger
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Common questions about “Kohler standby generator code Advanced Diagnostic”
What does Advanced Diagnostic mean on a Kohler standby generator?+
Shutdown during the reduced-speed portion of an exercise. The engine then restarts, runs at full speed for two minutes and stops; the controller returns to AUTO and the exercise schedule is unchanged.
What should I write down when my Kohler generator shows Advanced Diagnostic?+
The message, the time and what the generator was carrying. A dealer reads the controller's fault history, and a clear note saves a repeat visit.