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16 EN
Problem Possible solution
The airow that
comes out of
the air outlet is
signicantly weaker
than before.
• The pre-filter is dirty. Clean the pre-filter (see chapter
"Cleaning").
The air quality
does not improve,
even though the
appliance has been
operating for a long
time.
• One of the filters has not been placed in the appliance.
Make sure that all filters are properly installed in the
following order, starting with the innermost filter:
1) NanoProtect filter Series 3; 2) pre-filter.
• The air quality sensor is wet. The humidity level in your
room is high and causes condensation. Make sure that the
air quality sensor is clean and dry (see chapter "Cleaning").
The color of the air
quality light always
stays the same.
• The air quality sensor is dirty. Clean the air quality sensor
(see chapter "Cleaning").
The appliance
produces a strange
smell.
• The first few times you use the appliance, it may produce
a plastic smell. This is normal. However, if the appliance
produces a burnt smell, contact your Philips dealer or an
authorized Philips service centre. The appliance may also
produce an unpleasant smell when the filter is dirty. In this
case, clean or replace the filter concerned.
The appliance is
extra loud.
• If the appliance is too loud, you can change the fan speed
to a lower fan speed level. When using the appliance in a
bedroom at night, choose the sleep mode.
The appliance still
indicates that I
need to replace a
lter, but I already
did.
• Perhaps you did not reset the filter lifetime counter. Plug
in the appliance, touch to switch on the appliance, and
touch and hold the reset button for 3 seconds.
Error codes "E1",
"E2", "E3" or "E4"
displays on the
screen.
• The appliance has malfunctions. Contact the Consumer
Care Center in your country.
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