Oxygen NEREA Manual De Instrucciones página 14

of the LED signal lights flash. Once the photocells are running
correctly again, the control unit is ready for normal operation.
This ensures monitoring against failures, in compliance with EN
954-1, Category 2.
Control input test:
On each low voltage control input, the control unit uses a LED
signal to make the status readily known.
Operating logic: when a LED is on it means the input is closed,
when a LED is off it means the input is open.
LED MANAGEMENT :
After 3 minutes of inactivity in the programming procedure,
there is the automatic shutdown of the Leds for energy
savings. A single press of the SEL or SET key, or a movement
command will activate the LED light up according to settings
programmed previously.