TFA 30.3029 Manual Del Usuario página 124

* When the signal from the transmitter is successfully received by the Temperature
Station, this icon will be switched on. (If not successful, the icon will not be shown
on the LCD). User can therefore easily see whether the last reception was
successful ("ON" icon) or not ("OFF" icon). On the other hand, the short blinking of
the icon shows that a reception is being done at that time.
For a better display clarity, the LCD screen is split into 3 sections.
Section 1 - TIME
Display of time (manually set).
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Section 2 - INDOOR TEMPERATURE
Display of indoor temperature.
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