How do I access and adjust the technical parameters menu on the thermostat?

Open the back cover of the thermostat and access the buttons on the board on the front cover. Rotate the button and wait for the LCD screen to start flashing, then press and hold for 3 seconds until the LCD displays P01. Rotate the dial to navigate between P01–P05 and ESC, press the button to set a new value, and short press ESC to exit. Parameter settings should only be adjusted by professionals. (Page 26)