Philips AC4004 User Manual page 22

English
22
Problem
The appliance doesn't
work.
The AIR QUALITY lights
keep flashing and the
appliance does not work.
No air comes out of the
air outlet
The airflow that comes
out of the air outlet is
significantly weaker than
before.
The air quality does not
improve, even though
the appliance has been
operating for a long time.
The AIR QUALITY
light does not change
colour even though
the appliance has been
operating for some time.
I need cleaner air because
I have an allergy.
The appliance is extra
loud.
Possible solution
You ignored the filter replacement lights. You did not replace a filter when
the corresponding filter replacement light and the REPLACE FILTER light
started flashing and did not respond when the appliance started to beep
every 30 minutes after approx. 2 weeks. As a result, the appliance is now
locked and you have to replace the filter and reset the appliance (see
chapter 'Filter replacement') so that the appliance can provide healthy air
again.
There is a problem with the air quality sensor of the appliance. Please
contact the Philips Consumer Care Centre in your country (you find its
phone number in the worldwide guarantee leaflet). If there is no Consumer
Care Centre in your country, go to your local Philips dealer.
The appliance is not switched on. Put the plug in the wall socket and switch
on the appliance.
The air quality is good and the auto mode is activated. In this case, the
appliance stops operating automatically when the air is clean to save
electricity.
The pre-filter is dirty. Clean the pre-filter (see chapter 'Cleaning').
You haven't 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 appliance. Make sure that
all filters are properly installed in the following order, starting with the
innermost filter: HEPA filter, activated carbon filter, multi-care filter (AC4004
only), pre-filter. The multi-care filter (AC4004 only) has to be attached to
the back of the 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 chapter 'Cleaning').
The room in which you run the appliance is larger than 30m², which is the
maximum size at which this air purifier can operate effectively.
The air quality sensor is dirty. Clean the air quality sensor (see
chapter 'Cleaning').
You can change the air quality sensor sensitivity (see chapter 'Using the
appliance') to make the air purifier clean the air even better.
You have not removed all packaging material from the filters. Make sure that
you have removed all packaging material.