This is a revised automatic tap set up procedure.
When the tap is fitted. Before turning the water supply on, have a piece of white paper / card ready, switch on the power (mains or battery ) to the tap, sensor will show a red steady light and then start to flash, as soon as the flashing light appears hold the white paper/card at the distance required for 5 seconds and then remove, the sensor will continue to flash for a second or two then show a solid red light again, then stop, this indicates the setup is complete.
To reset the distance at any time, turn off the water supply and disconnect the power supply to the tap for a minimum of 30 seconds, reconnect the power supply only to the tap and follow the set up procedure again, then reconnect the water supply.
(In the case of flat batteries or loss of mains power the distance will require resetting).