De Dietrich 6545UNX Guide D'installation Et D'utilisation page 35

NO FROST: its significance and operation
EN
This appliance has been designed and manufactured to avoid
frost accumulating inside it.
A system automatically melts away any frost and the water
produced flows through a small pipe into the container provided,
where it evaporates away.
You do not need to de-ice the appliance yourself.
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