Miele S 290 series Kullanım Talimatları Kılavuzu - Sayfa 18
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Operation
Dustbag change indicator
Change the dustbag when the colour
marker in the dustbag change indicator
fills the display.
Dustbags are designed for single
use only.
Do not attempt to re-use them as
suction would be reduced.
Checking the dustbag change
indicator
^ Attach the standard floorhead to the
suction tube. Do not use any of the
other floorheads or attachments as
they will cause the dustbag change
indicator to give a false reading.
^ Switch the vacuum cleaner on and
turn the rotary selector (if applicable)
to the highest power setting.
Lift the floorhead off the floor a little. If
the red marker completely fills the
dustbag change indicator you should
replace the dustbag with a new one.
18
How the dustbag change indicator
works
The indicator is designed to measure
the air permeability of a dustbag
containing common household dust.
Normal household dust would contain a
mixture of dust, hair, carpet fluff,
threads, grit etc.
However, if the vacuum cleaner has
been used to suck up fine dust, such
as plaster, brick dust, cement or flour
the pores of the dustbag become
blocked very quickly. This affects the
air permeability of the bag and the
marker will indicate that the bag is "full"
even when it is not. If this happens you
must still change the dustbag because
suction power will be greatly reduced
by blocked pores in the dustbag.
If, on the other hand, you have
vacuumed up a lot of hair and carpet
fluff which typically contains a lot of air
the indicator may fail to react even
though the bag is full. You should still
change it! Both these extremes can
occur.