TFA 30.3045.IT Betriebsanleitung Seite 22

The comfort indicator arrow will not be shown if the temperature
is overflow ("OF.L")
AMBIENT TEMPERATURE/HUMIDITY DATA
The ambient temperature and humidity data are automatically
updated and displayed on the second section of the LCD.
Indoor
temperature
in ºC/ºF
THE AMBIENT CHANGE AND OPEN/CLOSE ICONS:
The third section shows the expected humidity changes when
airflow from outside occurs in a room.
Ambient change icons:
Condition
Expected humidity
changes is within +/-4%
Expected humidity
changes is +5% or more
Expected humidity
changes is -5% or less
Open / Close window icons:
The thermo-hygrometer also recommends to 'open' or 'close'
the window based on the ambient temperature and humidity
data:

3 options of recommended actions: 'Open window',
'Close window', no action.

Depending on the indoor comfort level indicator condition
and the 'More Wet', 'No Change', More Dry' humidity
change icon condition, the 'Open window' and 'Close
window' icon will be shown accordingly to the table
below:
Icons
No Change
More Wet
More Dry
21
Indoor
relative
humidity
in RH%