Once the central unit is powered and if this is your first time powering the unit, then flick the switch on the bottom of the unit to activate power from the YS6 battery.

LED 1 (power) will turn green if the boat power is connected correctly if not, it will show orange meaning the unit is using YS6 battery and not boat battery.

If you are trying to turn the unit off press and hold the red button and to turn it back on again you can again press and hold the red button for 3 seconds.