Philips AC4074 manual Air quality indication, Colour, Fan speed lights/filter replacement lights

English 11

,, The air quality light ring shows the quality of the air.

	Air quality indication
Colour	Air quality
Blue	very good
Deep purple	good
Purple	fair
Red	bad

To switch off the air quality light ring, press the AIR QUALITY button.

Note:The air quality light ring automatically goes on when the appliance is switched on.

,, The appliance automatically starts operating in the AUTO mode.

To  switch off the appliance, press and hold the on/off button again until the power-on light goes out and unplug the appliance.

Note:When the humidity level in the room is very high, it is possible that condensation develops on the air quality sensor. As a result, the AIR QUALITY light on the control panel and the air quality light ring may indicate that the air quality is bad even though the air quality is good. In this case,  the auto mode causes the appliance to run at high fan speed.You can solve this by cleaning the air quality sensor. If condensation develops frequently during periods of high humidity, we advise you to use one of the manual speed settings.

Fan speed lights/filter replacement lights

-- The lights on the right-hand side of the control panel have a dual function: they either indicate the fan speed or they indicate that the

filters should be replaced or cleaned.

-- When lights 1 to 3/4 light up continuously, they indicate the current fan speed.

-- When light 1 flashes, you have to clean the pre-filter. When lights 2 and/or 3/4 flash, you have to replace these filters. If lights 2 and/or 3/4 flash, the REPLACE FILTER light also flashes (see chapter ‘Filter replacement’ for more information).

-- When lights 2, 3/4 and the REPLACE FILTER light are on continuously, the appliance is locked (see chapter ‘Filter replacement lock’ for more information).

Adjusting the air quality sensor sensitivity

People with certain health problems (e.g. allergies or asthma) have a

greater need for healthy air. For this reason, the air cleaner allows you to