Troubleshooting - Philips AC4012 User Manual

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9 Troubleshooting

This chapter summarizes the most common problems you could encounter with the
purifier. If you are unable to solve the problem with the information below, contact the
Consumer Care Center in your country.
Problem
The
light has been on
continuously.
No air comes out of the
air outlet.
The fan speed does not
change when the sleep
mode is activated.
The airflow that comes
out of the air outlet is
significantly weaker
than before.
The air quality does not
improve, even though
the purifier has been
operating for a long
time.
The color of the air
quality light always
stays the same.
I need cleaner air
because I have an
allergy.
The purifier is extra
loud.
EN
12
Possible solution
The filter is full. Replace the filter and reset the filter
lifetime counter.
The purifier is not connected to the power supply. Put the
plug of the purifier into the power outlet and switch on.
In sleep mode, the fan speed is set to a very low level.
If you want to change the fan speed, press the
one or more times to set the desired fan speed.
• The pre-filter is dirty. Clean the pre-filter (see the
chapter "Clean the pre-filter").
• You have not removed all packaging material from the
filters. Make sure that you have removed all packaging
material.
• One of the filters has not been placed in the purifier.
Make sure that all filters are properly installed in the
following order, starting with the innermost filter: 1)
NanoProtect filter, 2) NanoProtect Activated Carbon
filter, and 3) 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 'Clean the
air quality sensor').
• The air quality sensor is dirty. Clean the air quality
sensor (see 'Clean the air quality sensor').
• There is not enough ventilation in the room. Open a
window, to improve the air circulation.
You can change the air quality sensor sensitivity (see
'Set the sensitivity of the air quality sensor') to make the
purifier clean the air even better.
• Please check if you have removed all the packaging
material from the filters.
• If the appliance is still too loud, you can change the fan
speed to a lower fan speed level.
button

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