Symptom	Cause	Remedy
I/O Module Not Found	The system does not detect an I/O module at an expected address.	Check that the number of I/O modules installed matches the number expected by the setup program. Check that the I/O modules are connected and the address DIP switches are set correctly. Check the diagnostic LED to verify that the module is receiving power and communicating with the controller.
I/O Module Not Installed	The software detects an I/O module that is connected but not expected by the setup program.	Check that the number of I/O modules expected in the Setup Program matches the number of modules installed on the transfer switch. Check that the I/O module address DIP switches are set correctly. Check the diagnostic LED.
I/O Module Communications Lost	Communication to an I/O module that was previously installed and working is lost.	Check the I/O module connections and diagnostic LED.

Symptom → cause → remedy extracted from this unit’s service/owner documentation; verify against the official manual before servicing.

Kohler Model S — transfer switch. Specifications and parts compiled from manufacturer documents.

Kohler Model S Transfer Switch