Miele DA 289-4 Operating And Installation Manual page 16

Operation
If the indicator light for the grease filter
turns blue during operation, this
indicates that an unrequired electronic
has been activated.
To deactivate:
– With the fan turned off, press the "+"
button and grease filter button at the
same time.
The grease filter indicator light turns
blue and the "– / +" indicator lights
flash.
– Press the "+" button repeatedly until
the forth indicator light for the "– / +"
buttons lights up.
– Confirm by pressing the grease filter
button.
All indicator lights go out.
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