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The dustbag change indicator shows
when the dustbag needs to be
changed.
^ Set the suction power selector (if
present) to the highest setting.
^ Switch the vacuum cleaner on and lift
the floorhead off the floor a little.
To do this test you should only use
the standard floorhead on your
vacuum cleaner. Do not use any of
the other floorheads or attachments
as they will cause the dustbag
change indicator to give a false
reading.
Change the dustbag when the colour
marker in the dustbag change indicator
fills the display.
^ You should change the bag even if it
does not appear to be full.
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The indicator is designed to measure
the air permeability of a dustbag con-
taining common household dust. Nor-
mal 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 vacu-
umed 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.