AYA AFM3502X Manuel D'utilisation page 58

OK
If the indicator of temperature turns WHITE, this means that the
temperature is too high; in this case, increase the refrigerator
temperature control setting and wait for 12 hours before
performing a new visual inspection of the indicator.
When fresh food has been introduced or the door has been left
open, it is possible for the indicator of temperature to turn
WHITE after a while.
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