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Air quality sensor

Clean the air quality sensor every 2 months for optimal functioning of the appliance. Clean it more frequently if you use the appliance in a dusty environment.

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 you have to clean the air quality sensor or use one of the manual speed settings.

1Clean the air quality sensor inlet and the air quality sensor outlet with a soft brush.

2 Remove the air quality sensor cover.

3 Clean the air quality sensor, the dust inlet and the dust outlet with a lightly moistened cotton swab.

4Dry them with a dry cotton swab.

5 Reattach the air quality sensor cover.

Filter replacement

Filter maintenance

This air cleaner is equipped with the HealthyAirProtect Lock feature to ensure that the filters are in optimal condition when the appliance is operating. When one of the filters is almost full and has to be cleaned or replaced, the appropriate filter replacement light starts to flash. When you do not replace filter 2, 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 lights up on continuously.

Note: Only replace a filter when the corresponding filter replacement light flashes. If you replace the filter before the filter replacement light starts flashing, the lifetime counter will not be reset but will continue counting the lifetime of the previous filter. As a result, the filter replacement light will start flashing much too soon.

Filter replacement lights

The filter replacement lights indicate which filter has to be cleaned or

replaced.

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Philips AC4074 manual Air quality sensor, Filter maintenance, Filter replacement lights
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AC4074 specifications

The Philips AC4074 is a cutting-edge air purifier designed to enhance indoor air quality in homes and offices. With its modern aesthetic and robust functionality, this device addresses common air pollutants, providing a healthier living environment.

One of the standout features of the Philips AC4074 is its advanced filtration system. It utilizes a multi-layered filter that includes a pre-filter, a HEPA filter, and activated carbon. The pre-filter effectively captures larger particles such as dust and hair, while the HEPA filter is capable of trapping 99.97% of particles as small as 0.3 microns. This includes harmful allergens like pollen, dust mites, and pet dander, making it ideal for allergy sufferers. The activated carbon layer works to eliminate odors and harmful gases, ensuring that the air is not only clean but also fresh.

The AC4074 incorporates Philips’ innovative VitaShield technology, which enhances its filtration capabilities. This technology senses the air quality in real-time, automatically adjusting the purification speed based on the level of pollutants detected. With its Smart Sensor, users can rest assured that the device will operate efficiently, providing purified air without any manual intervention.

In addition to its powerful purification features, the Philips AC4074 boasts a user-friendly interface. It features intuitive controls, allowing users to adjust settings with ease. The LED display provides real-time feedback on air quality, filter status, and operational mode.

Another notable characteristic of the AC4074 is its quiet operation. Designed for use in bedrooms and living spaces, the air purifier includes a sleep mode, which reduces noise levels for undisturbed rest. Its compact design allows it to fit seamlessly into any room, making it a practical choice for various living environments.

With energy efficiency in mind, the Philips AC4074 is also designed to operate without significantly increasing energy bills. The unit is compliant with various energy standards, ensuring that it provides environmental benefits without compromising on performance.

Overall, the Philips AC4074 represents a harmonious blend of technology, efficiency, and design, making it an excellent choice for anyone looking to improve their indoor air quality. With its powerful filtration system, smart sensing capabilities, user-friendly controls, and quiet operation, it stands out as a reliable air purifier that meets the needs of modern living.
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