15EN
8 Troubleshooting
This chapter summarizes the most common problems you could encounter with the air
purifier. If you are unable to solve the problem with the information below, contact the
Consumer Care Center in your country.
Problem Possible solution
The air purier
does not work
even though it is
plugged into the
wall outlet and
switched on.
• The timer is set to a specific time interval. Reset or turn off
the timer.
• Try a different electrical outlet or check the wall switch.
• The filter alert status is displaying the filter code. Replace
the corresponding filter and reset the filter lifetime counter
(see chapter "Replacing the filters").
• If the problem persists, visit www.philips.com/support
or contact the Consumer Care Center in your country for
assistance.
The air purier
does not work
even though it is
switched on.
• The filter replacement indicator has been on continuously
but you have not replaced the corresponding filter, and the
air purifier is now locked. In this case, replace the filter and
reset the filter lifetime counter.
The air purier
accidentally
powers o.
• The air purifier restarts automatically and goes to the
previous mode when the power resumes.
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 a filter is not placed properly. Make sure that all filters
are properly installed in the following order, starting with
the innermost filter: 1) NanoProtect HEPA filter (FY2422);
2) NanoProtect Active Carbon filter (FY2420); 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").
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