Suction Level Indicator - Miele S157 Operating Manual

Suction Level Indicator

Only test the vacuum's suction level
indicator with the rug and floor tool
attachment. Using any other attach-
ment will give an inaccurate reading.
^ Set the suction power selector, (ac-
cording to model), to the highest set-
ting and close the air inlet valve.
^ Lift the rug and floor tool off the floor.
^ The dustbag should be changed if
the red marker completely fills the in-
dicator window, even if the dustbag
is not completely full.
Please note:
The indicator measures the airflow
through the dustbag.
Vacuuming up even a small bit of fine
dust such as flour, ash or powder can
cause enough of a drop in airflow to
cause a "full bag" indication, even
though the dustbag may appear almost
empty. Since the airflow (suction power)
is greatly reduced, the bag should be
changed. On the other hand, the
dustbag may be bulging with carpet lint
or pet fur yet the airflow may still be
high enough to prevent the suction
level indicator from registering "full". If
this occurs the dustbag should be
changed.
Maintenance and care
Either of these extremes can occur dur-
ing normal use.
The suction level indicator is designed
to work when a mixture of the above
items, along with hair, sand, etc . are
vacuumed, as is generally the case
when using the vacuum for normal
household cleaning.
We recommend that:
1. If you vacuum a lot of fine dust or
sand:
^ Change the dustbag as soon as the
red marker fills the indicator window,
even if the bag is not full.
2. If you vacuum a lot of hair, pet fur or
loose carpet fibers: the suction level
indicator will show only reduced suc-
tion when in fact the bag is full.
^ Change the dustbag as soon as it
physically full, even if the suction
level indicator shows that it is not.
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