Miele DA 112 Operating And Installation Manual page 50

^ Fit the charcoal filter into the bracket.
When fitting for the first time:
^ Set the operating hours counter to
suit your requirements
(see Operation - Setting and altering
the charcoal filter operating hours
counter).
Always replace the filters when the
charcoal filter touch control indicator
light comes on, or if they are no longer
effective in absorbing kitchen odours.
They should, however, be replaced at
least every 6 months.
^ After fitting the new charcoal filter(s),
press the charcoal filter touch control
for approx. 3 seconds to re-set the
operating hours counter.
The indicator light will go out.
50
^ If the charcoal filters are replaced
before the operating hours counter
has reached its maximum, the
charcoal filter touch control should be
pressed for approx. 6 seconds to
reset the counter.