Problem Possible solution | Philips AC4074 instruction

	English 21
Problem	Possible solution

The appliance doesn’t	You ignored the filter replacement alerts.You did not replace the filter
work.	when the filter replacement light started flashing and did not respond when
	the appliance started to beep every 30 minutes after approx. 2 weeks. As
	a result, the appliance is now locked and you have to replace the filter and
	reset the appliance (see chapter ‘Filter replacement’) so that the appliance
	can operate again.

No air comes out of the air outlet

The appliance is not switched on. Put the plug in the wall socket and switch on the appliance.

The air quality is good and the auto mode is activated. In this case, the appliance switches off automatically when the air is clean to save electricity.

The fan speed does not change when the AUTO mode is activated.

The airflow that comes out of the air outlet is significantly weaker than before.

The air quality does not improve, even though the appliance has been operating for a long time.

The colour of the air quality light ring and the air quality light always stays the same.

I need cleaner air because I have an allergy.

The appliance is extra loud.

The appliance still indicates that I need to replace a filter, but I already did.

When the room becomes dark, the night mode is activated automatically when the appliance is in auto mode. In this case, the fan speed is set to a very low level. If you want to change the fan speed, press the FAN SPEED button one or more times to set the desired fan speed.

The pre-filter is dirty. Clean the pre-filter (see chapter ‘Cleaning’).

You haven’t removed all packaging material from the filters. Make sure that you have removed all packaging material.

One of the filters has not been placed in the appliance. Make sure that all filters are properly installed in the following order, starting with the innermost filter: 1) HEPA filter, 2) activated carbon filter, 3) formaldehyde filter (supplied with AC4074) or multi-care filter (supplied with AC4072), 4) pre-filter.

The air quality sensor is wet.The humidity level in your room is high and causes condensation. Make sure that the air quality sensor is clean and dry (see chapter ‘Cleaning’).

The room in which you run the appliance is larger than 55m², which is the maximum size at which this air cleaner can operate effectively.

The air quality sensor is dirty. Clean the air quality sensor (see chapter ‘Cleaning’).

There is not enough ventilation in the room. Open a window, to improve the air circulation.

You can change the air quality sensor sensitivity (see chapter ‘Using the appliance’) to make the air cleaner clean the air even better.

You haven’t removed all packaging material from the filters. Make sure that you have removed all packaging material.

Perhaps you did not press the filter reset button properly. Plug in the appliance, press and hold the on/off button and press the filter reset button with a flat tool.

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.

English 21

Problem

Possible solution

work.

The appliance is extra loud.

AC4074 specifications