Philips AC4002 Manual De Usuario

 3 

Clean the air quality sensor, the dust inlet and the dust outlet with a

lightly moistened cotton swab.

 4 

Dry them with a dry cotton swab.

 5 

Reattach the air quality sensor cover.

Filter maintenance
When one of the filters is almost full and has to be cleaned or replaced, 

the corresponding light or lights (the pre-filter cleaning light or one of the 

filter replacement lights together with the ‘REPLACE FILTER’ light) start to 

flash. You then have to clean or replace this filter.

This air cleaner is also equipped with the HealthyAirProtect Lock feature 

to ensure that the filters are in optimal condition when the appliance is 

operating. When you do not replace filter 2 (AC4004 only), filter 3 and/or 

filter 4, the appliance stops operating and the appliance is locked. When the 

appliance is locked, the filter replacement light of the filter concerned and 

the ’REPLACE FILTER’ light light up continuously.
Filter cleaning light and filter replacement lights
The filter cleaning light and the filter replacement lights indicate which filter 

has to be cleaned or replaced.

 - Filter cleaning light 1 flashes: you have to clean filter 1 (pre-filter). See 

chapter ‘Cleaning’ for further instructions.

 - Filter replacement light 2 and the ‘REPLACE FILTER’ light flash: filter 2 

(multi-care filter, AC4004 only) has to be replaced.

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