Miele DA 270-4 Operating And Installation Instructions page 18

Operation
Altering the operating hours counter
for the grease filters
The operating hours counter for the
grease filters is set at the factory for 30
hours. This can be lengthened or
shortened to suit the type of cooking
you do. You can choose 20, 30, 40 or
50 hours.
– Select a short time if you roast or fry
a lot.
– If you use very little fat for cooking,
select a longer time.
– If you only cook occasionally we
recommend that you still select a
short time, because grease which
has built up gradually over a long
period of time will harden on the
grease filters and make cleaning
more difficult.
^ Press the On/Off control to switch the
fan off.
^ Press the run-on option control and
the grease filter control at the same
time.
The indicator lamp for the grease filter
control and one of the - / + indicator
lamps will flash.
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The - / + indicator lamps show the time
which has been set:
1st lamp from the left = 20 hours
2nd lamp from the left = 30 hours
3rd lamp from the left = 40 hours
4th lamp from the left = 50 hours
^ Use the - /+ controls to select the
desired time.
^ Confirm the selection by pressing the
grease filter control.
All the indicator lamps will go out.
If you do not confirm your selection
within 4 minutes, the cooker hood
will automatically revert to the "old"
data.