Miele DA 6590 D Operating And Installation Instructions page 13

Checking the elapsed operating time
Even before the maximum operating
time has been reached, you can check
what percentage of the time has
elapsed.
^ Press the On/Off button K to turn the
fan on.
^ Press the timer button [— –
– once, to check the grease filter
operating time. The grease filter
symbol [ comes on.
At the same time one or more power
level indicators start flashing.
The number of flashing indicators
shows the elapsed operating time:
Indicator 1 . . . . . . . . . . . . . . . . . . . 25%
Indicators 1 and 2 . . . . . . . . . . . . . 50%
Indicators 1 to 3 . . . . . . . . . . . . . . . 75%
Indicators 1 to IS . . . . . . . . . . . . . 100%
The number of operating hours remains
stored when the ventilation system is
turned off or if the electric power supply
is interrupted.
Operation
13