The attached spreadsheet listed below features all DTV I and DTV II error codes. These codes are also referenced on the corresponding Service Manuals, listed below.
To find the corresponding error codes, follow these steps:
DTV I: Settings-->Valve-->Diagnostics
DTV II: Settings-->System-->Error Log (or Diagnostics of you wish to check connectivity to devices)
Note: For errors with DTV+, please contact Kohler Customer Service at 1-800-4KOHLER.