Grundig GDK 2386 CF User Instructions page 21

Operation
Within this timeframe, press:
button in case of gas hob
button in case of electric hob
button in case of induction hob
The preselected button remains lit
to indicate the selection was per-
formed, after 10 seconds the button
flashes briefly to indicate that the
performed selection was recorded.
Cleaning mode
Exclude electronic components:
press and
buttons start flashing to indicate
that you are in "Cleaning mode"
and it is therefore possible to per-
form filters' maintenance or access
the motor compartment.
Press the button
to exit the "Cleaning mode" func-
tion.
for 5 seconds,
for 5 seconds
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