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c) Reception indicator
As soon and as long as the selected sensor is correctly received, the small aerial symbol is
displayed continuously.
If there is no reception for more than 40 minutes, the aerial symbol flashes. The most recently
received values are indicated further.
If there is no reception for more than 12 hours, the aerial symbol is not displayed any more and
the corresponding value indication is "– – .–".
d) Frost alarm
A soon as the temperature at one of the currently displayed temperature sensors falls under
+4°C (+39.2°F), the frost alarm symbol " " is displayed in the corresponding display level.
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