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18 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 air
purier has been
operating for a
long time.
• One of the filters has not been placed in the air purifier or
the filter is not placed properly. Make sure that all filters
are properly installed in the following order, starting with
the innermost filter:
1) NanoProtect True HEPA filter (FY1410); 2) NanoProtect
Active Carbon filter (FY1413) 3) pre-filter.
• The air quality sensor is wet. 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 air purier
produces a
unpleasant smell.
• The first few times you use the air purifier, it may produce
a plastic smell. This is normal. The air purifier may also
produce an unpleasant smell when the filter is dirty. In this
case, clean or replace the appropriate filter.
• If the air purifier produces a burnt odor, switch OFF and
unplug from the electrical outlet. Call 1-866-309-8817 for
assistance.
The air purier is
loud.
• If the air purifier is too loud, change the fan speed to a
lower fan speed level. When using the air purifier in a
bedroom at night, choose the night sensing mode or select
a lower fan speed level.
The air purier 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 air purifier, touch to switch on the air purifier, and
touch and hold the for 3 seconds.
Error codes "E1",
"E2", "E3" or "E4"
displays on the
screen.
• The air purifier has malfunctions. Visit www.philips.com/
support or call 1-866-309-8817 for assistance.
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