Miele KMDA 7774 Operating And Installation Instructions page 56

Problem solving guide
Problem
The  sensor is lit up.
The  sensor is lit up.
56
Possible cause and remedy
The charcoal filter needs to be reactivated.
 If the extractor is being operated in Recirculation
mode, proceed as described in the operating and
installation instructions supplied with the
recirculation box. Reset the operating hours
counter (see "Cleaning and Care" in this manual).
 If the extractor is being operated in Extraction
mode, reset the operating hours counter (see
"Cleaning and Care" in this manual).
The grease filter must be cleaned.
 Clean the grease filter as described in "Cleaning
and Care – Grease filter / Extraction grille".