This article explains how to use the BSB 601 BSB 901 by Boretti.
R5 OPERATION A: Lights ON/OFF Button: the extractor hood lights are turned on and off by pressing the button. B: Engine ON/OFF Button (4 speeds): the extractor is switched on by pressing the button. The extractor speed (power) can be adjusted using buttons “C” and “D“. C: Extractor Speed (power) Reduction Button: the extractor speed is reduced by pressing the button. D: Extractor Speed (power) Increase Button: the extractor speed is increased by pressing the button. F: Timer Button: the 5-minute timer is activated by pressing the button, whatever the speed selected; the timer is deactivated by pressing the same button again. E: LED indicates the different speeds: green, speed 1; amber, speed 2; red, speed 3; blinking red, speed 4 (speed timer activated; it stays on for 7 minutes, then it automatically goes back to the last selected speed.) Do not use solvents to clean the control.