CUCKOO CAC-K1910 True HEPA Air Purifier
Part names
Accessories
The picture may differ from the actual product.
Part Description
Air Purifying
Filter Functions
| Pre-Filter | Removes dust, pet fur, and other larger particles. It also helps extend the life cycle of the of the filters. | |
| Functional Filter | Allergen Filter | Removes allergy causing particles such as dust mites and pollen. |
| Ultra-Deo PM 2.5 Filter | True HEPA (H13) Filter | Helps filters mites, pollens, fine dust and cigarette smoke. |
| Activated Carbon Filter | Helps filter unpleasant odors and harmful gases. Great for removing odors that occur from food, cigarettes, animal fur, Nitrogen Dioxide causing sources and bathrooms. | |
Names and Functions of Control & Display Panel
Control Panel and Display Panel
Purification Display Panel
- Air Quality Indicator – Displays how clean the surrounding air is using its 8 colored LED lights
- ※ Levels of cleanliness are displayed in 8 different colors.
(Poor) Red → Purple → Orange → Yellow → Light Green → Green → Light Blue → Blue (Clean). - ※ Insert the power plug and press the [Power] button to turn on product.
- ※ Make sure you hear a beep when pressing a button. This Control & Display Panel may look different from the actual appearance.
- ※ During Air Purification operation, the product’s performance may vary according to the air volume.
- ※ If Sleep operation is selected, the Air Quality Indicator will automatically turned off.
- ※ If different products are used in the same area, there may be a difference in pollution level due to air circulation.
Self Diagnostic Mode / Basic Operation of Display Panel
Self Diagnostic Mode
If the display panel continues to illuminate under normal conditions or after an action is taken, please contact our customer service center.
- This will indicate an issue with the filter cover.
- Re-install the filter cover.
- If the issue has not been resolved, please contact our Customer Service Center.
Basic Operation
- Insert the power plug. A buzzing sound will go off and the air purifier will enter Standby Mode.
- Press the Power button. Display Panel will automatically illuminate and the fan will begin operation. The air purifier will run its previous operating mode. If the filter cover is not properly installed, a filter cover error will illuminate on the display panel.
- Press the mode button to set your desired operation mode. Every time you press the mode button, the mode will change in this order “Auto Air Purification -Sleep Air Purification – Manual Gear 1 – Manual Gear 2 – Manual Gear 3 – Turbo Air Purification”.
- During operation, press and hold the mode button for 3 seconds to turn the UV-C LED on or off.
- To turn off the product, press the Power button once again.
Operating Modes
+ 
Auto+ Mode will automatically adjust air volume according to the surrounding environment. To conserve energy, the fan will turn off when air quality is good.
- To start auto mode, press the Power Button while in standby Mode. (It is operated in Auto Air Purification for initial entry and, if there is previous operation history, it is operated in the previous mode.)
- In Auto Mode, the air purifier will sense how clean the air is and will adjust fan speed accordingly.
+ 
Sleep Mode will minimize air volume and dim display lights.
- Start sleep mode by pressing the mode button once while in auto mode.
- For a sound sleep, the air volume will minimize and the air purifier will operate quietly.
- The Air Quality Indicator will turn off while in Sleep Mode.
Operating Modes
+Allows you to select the fan speed.
- To enter manual mode, press the mode button twice while in Auto Mode.
- Press the mode button to set desired fan speed (Lo, M, Hi).
+Turbo Mode will quickly remove dust with maximized performance.
- To enter turbo mode, press the mode button five times while in auto mode.
- Proceed with high-speed air purification.
Guide and Other Settings for each Operational State
Operation Status Information
Air Quality Level Display
| Pollution Level | Level 1 (Clean) | Level 2 | Level 3 | Level 4 | Level 5 | Level 6 | Level 7 | Level 8 (Poor) |
| Air Quality Indicator | Blue | Sky Blue | Green | Light Green | Yellow | Orange | Purple | Red |
Button Sound ON/OFF Setting
- Insert the power plug and begin Standby Mode (Display Panel lamps will turn off).
(While in operation, press the Power button to stop.) - Press and hold the Mode button for 3 seconds to set the button sound ON or OFF.
(Mute for OFF, melody plays for ON).
Cleaning and Maintenance Guide
How to Clean the Fine Dust Sensor (Clean once every one to two months)
- Open the filter cover from the back.
- Open the cover of the Fine Dust Sensor.
▶ Clean first with a soft brush. - Carefully wipe the Fine Dust Sensor lens with a swab.
▶ Clean first with a soft brush.
How to Clean the Main Body
- Soak a soft cloth with lukewarm water and wring it out before wiping down the exterior.
- Use a swab or cotton flannel to clean the dust in grooves on the exterior.
How to Clean the Air Outlet (Clean once every two to four weeks.)
- Use a soft brush and a vacuum cleaner to clean the dust in the air outlet.
How To Replace the Filters
- If the filter replacement light is lit, replace the filter.
- Always unplug the power cord before replacing a filter.
- If you exceed the filter cleaning or replacement cycle, the performance may deteriorate or an odor may develop.
- Please use genuine CUCKOO filters only. Otherwise, this may hinder the performance or cause the air purifier to breakdown.
- Do not use if the surface of the Air Purification Filter is torn or wet. Instead, replace with a new filter. For filter purchase, contact our Customer Service Center.
- The filter replacement cycle may vary according to the surrounding environment.
Filter Cleaning and Replacement Cycle
| Filter | Cleaning / Replacement | Cleaning/Replacement | Note | |
| Pre-Filter | Detachable pre-Filter | Once in 2 to 4 weeks | Cleaning & Washing | |
| Functional Filter | Allergen Filter | Once / 4 months | Replacement | |
| Ultra-Deo PM2.5 Filter (H13 True HEPA+ Activated Carbon Filter) | Once / 12 months | Replacement | ||
How to Replace the Air Purifying Filter
Please check before asking for Support.
| Problem | Checklist | Recommended Actions |
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The product won’t work even if I pressed the Power button. |
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| The air volume won’t change. |
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Air purification does not work properly |
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(Avoid placing near an area with high air circulation such as a door or window)
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There is an odor coming from the air vent. |
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Ventilate the room before using the product.
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| The air quality indicator color does not change. |
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| When other functional defects occur |
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Product Specifications
| Category | Air purifier |
| Model name | CAC-K1910FW |
| Rated Voltage and Current | 120V~, 60Hz |
| Rated Power Consumption | 60W (1A) |
| Dust Collecting Method | Mechanical dust collecting method |
| Safety Device | Power is blocked when the door is being opened or closed |
| Place for Use | For indoors |
| Product Size | 13.2(W) x 13.2(D) x 25.6(H) Inch |
| Product Weight | 15.4 lbs (7kg) |
FOR MORE MANUALS BY CUCKOO, VISIT MANUALSLIBRARYY
CUCKOO CAC-K1910 True HEPA Air Purifier-FAQ’s
Should I run my CUCKOO air purifier all the time?
Yes, it’s recommended to keep your air purifier running continuously. Turning it off allows pollutants like dust, mold spores, and dander to quickly return, reducing air quality.
How does the CUCKOO smart air purifier work?
It uses a multi-stage filtration system: a Pre-filter, Activated Carbon Filter, True H13 HEPA Filter, and Plasma Filtration. Together, they remove up to 99.97% of particles as small as 0.1 µm, including allergens and pollutants.
What is the primary function of an air purifier?
Air purifiers clean the air by removing contaminants like dust, pollen, smoke, pet dander, and mold, resulting in fresher and healthier indoor air.
What is a cuckoo filter (technical term)?
In computing, a cuckoo filter is a space-efficient data structure used to test whether an item is in a set. It may return false positives but never false negatives. (Note: This is unrelated to the CUCKOO air purifier brand.)
Do air purifiers consume a lot of electricity?
No. Most air purifiers use between 30 and 250 watts—comparable to or even less than a typical light bulb. The CUCKOO air purifier is energy-efficient and designed for continuous use.
When should I turn off the air purifier?
Generally, you don’t need to turn it off. For best results, especially in polluted environments, keep it on at all times. Many models have auto modes to optimize performance and power use.
Can I use the air purifier with windows open?
Yes, you can run your air purifier with windows open. However, keep in mind that open windows may allow more pollutants inside, so your purifier will need to work harder to maintain clean air.
What are the fan modes available on CUCKOO air purifiers?
The CUCKOO fan offers various modes: Basic, Natural, Sleep, Eco, and Turbo. These modes adjust airflow for comfort, energy savings, or powerful circulation based on your preference.