Kohler K-R78035 Guía De Instalación Y Cuidado página 13

Manual Sensor Override
In the event of power loss, the sensor function can be bypassed
by engaging the manual override feature on the valve box.
Turn clockwise to engage the bypass and counterclockwise to
disable the bypass.
Once the manual override is engaged, the faucet can then be
operated manually.
Kohler Co. 13 1281441-2-C