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14 EN
7 Troubleshooting
This chapter summarizes the most common problems you could encounter with the
appliance� If you are unable to solve the problem with the information below, contact the
Consumer Care Center in your country�
Problem Possible solution
The appliance does
not work even though
it is plugged in�
• The lter replacement alert has been on continuously but you
have not replaced the corresponding lter� As a result, the
appliance is now locked� In this case, replace the lter and long
press
to reset the lter lifetime counter�
The airow that
comes out of the air
outlet is signicantly
weaker than before�
• The surface of the lter is dirty� Clean the surface of the lter (see
the chapter “Cleaning and maintenance”)�
The air quality does
not improve, even
though the appliance
has been operating
for a long time�
• Check if the packing material is removed from the lter�
• The lter has not been placed in the appliance� Make sure that
the lter (FY4440/30) is properly installed�
• The particle sensor is wet� The humidity level in your room is high
and causes condensation� Make sure that the particle sensor is
clean and dry (see the chapter “Cleaning and maintenance”)�
• Room size is large or the outdoor air quality is poor� For optimum
purication performance, please close the doors and windows
when operating the air purier�
• There are indoor pollution resources� For instances, smoking,
cooking, incense, perfume or alcohol�
• Filter reaches the end of life� Replace the lter with a new one�
The color of the air
quality light always
stays the same�
• The particle sensor is dirty� Clean the particle sensor (see the
chapter “Cleaning and maintenance”)�
The appliance
produces a strange
smell�
• The rst few times you use the appliance, it may produce a plastic
smell� This is normal� However, if the appliance produces a burnt
smell even if removing lter, contact your Philips dealer or an
authorized Philips service center� The lter may produce smell
after being used for a while because of the absorption of indoor
gases� It’s recommended that you reactivate the lter by putting it
in direct sunlight for repeated use� If odor still exists, replace the
lter�
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