Philips AC4074 User Manual page 21

Problem
The appliance stops
operating, although the
power-on light is still on.
The appliance does not
work. Fan speed lights 1, 2
and 3 flash, all other lights
are out.
The appliance does not
work. Fan speed lights 1
and 2 flash, all other lights
are out.
AC4074: The appliance does
not work. The air quality
light ring flashes blue, all
other lights are out.
AC4074: The air quality light
ring keeps flashing purple.
Possible solution
The built in quality sensor has determined that the air quality is good and
that the air does not need to be cleaned anymore. When the air quality
deteriorates, the appliance starts running at a low fan speed and noise level
so that the energy consumption is minimised.
This is a component defect. Contact the 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.
This is a component defect. Contact the 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.
This is air particle sensor error or an air particle sensor and gas sensor error.
Contact the 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.
This is a gas sensor error. Switch off the appliance and unplug it. Take the
appliance to your Philips dealer or an authorised Philips service centre.
ENGLISH
21