Philips AC4074 Air Cleaner User Manual


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- Filter replacement light 1 ashes: lter 1 (the pre-lter) has to be
cleaned. See chapter ‘Cleaning’ for further instructions.
- Filter replacement light 2 ashes: lter 2 (the formaldehyde lter
(supplied with AC4074) or multi-care lter (supplied with AC4072))
has to be replaced.
- Filter replacement light 3/4 ashes: the activated carbon lter and the
HEPA lter have to be replaced.
Note: The HEPA lter and the activated carbon lter have a similar lifetime.
Therefore they have to be replaced at the same time.
Filter replacement lock
If you do not replace the lter in time, the appliance stops operating
approx. 2 weeks after the lter replacement light started ashing.When the
appliance is locked, it does not operate until you have replaced the full lter
and pressed the reset button.
Note: When lter replacement lights 2 or 3/4 and REPLACE FILTER on the
control panel are on continuously, the appliance is locked (see section ‘Filter
maintenance’ in this chapter for more information).
How long it takes before the appliance is locked depends on the operating
time and speed level selected after the lter replacement alert.
Approximately 1 day before the appliance locks, it beeps every 30 minutes
to inform you that one of the lters needs to be replaced.
When the appliance is locked, you hear a beep when you press any button.
You can switch off the appliance by pressing and holding the on/off button.
If the appliance is locked:
1 Checkwhichlterneedstobereplaced(seesection‘Filter
replacementalerts’).
2 Switchofftheapplianceandunplugit.
3 Replacetheappropriatelter(seesection‘Replacingthelters’).
ENGLISH16
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