Philips AC4550 - Troubleshooting

40 EN
8 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.
• Check if the top cover is properly installed.
• The lter replacement light 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 reset the lter lifetime counter.
The airow that
comes out of
the air outlet
is signicantly
weaker than
before.
• The pre-lter is dirty. Clean the pre-lter (see the
chapter "Cleaning").
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
lters.
• One of the lters has not been placed in the appliance.
Make sure that all lters are properly installed in the
following order, starting with the innermost lter:
1) NanoProtect lter Pro S3 (FY4152); 2) pre-lter.
• 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 the 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 the chapter "Cleaning").