Miele DA 270 U Operating And Installtion Instructions page 14

Operation
Reprogramming the active charcoal
filter timer
The active charcoal filter can only be
used in recirculation mode and can not
be used to exhaust fumes.
The active charcoal filter timer is not
preset.
Before using the hood in recirculation
mode, the active charcoal filter timer
must be programmed.
^ Press the On/Off button to turn off the
fan.
^ Press the Delayed Shut Down and
active charcoal filter buttons at the
same time.
14
The indicator for the active charcoal
filter and one of the _ indicators will
flash.
The lit _ indicator shows the
programmed time:
1st indicator from the left = 20 hours
2nd indicator from the left = 30 hours
3rd indicator from the left = 40 hours
4th indicator from the left = 50 hours
^ Use the _ button to select the
desired time.
^ Store the selection by pressing the
active charcoal filter button.
If the procedure is not stored within
4 minutes of programming, the hood
will automatically default to the "old"
data.