Becker U30 Notice De Montage Et D'utilisation page 57

Astro function
Note:
If the up time is programmed before sunrise, the roller shutter
moves up at sunrise.
If the up time is programmed after sunrise, the roller shutter moves
up at the programmed up time.
If the down time is programmed after sunset, the roller shutter
moves down at sunset.
If the down time is programmed before sunset, the roller shutter
moves down at the programmed down time.
Important: Activating the Astro function automatically disables
the week function.
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