Introduction
The Cecotec Pure Aroma 150 Yin is an ultrasonic humidifier and aroma diffuser designed to improve air quality and create a pleasant atmosphere in your home. It features a silent operation, a 150 ml water tank, a 3-hour timer, and 7 LED light colors. This manual provides essential information for the safe and efficient use of your device.

Image: The Cecotec Pure Aroma 150 Yin humidifier and aroma diffuser, dark wood finish, emitting a fine mist, placed on a bedside table.
Safety Instructions
- Always dilute essential oils before adding them to the water tank. Using undiluted oils can damage the device and pose health risks.
- Ensure adequate ventilation in the room during operation, especially when using essential oils.
- Keep the device out of reach of children and pets to prevent accidental spills or ingestion of essential oils.
- Do not immerse the device in water or any other liquid.
- Use only the provided power adapter.
- Unplug the device from the power outlet before cleaning or refilling.
- Do not block the mist outlet.
- Place the device on a stable, flat surface away from direct sunlight or heat sources.
Package Contents
Please check the box for the following items:
- Cecotec Pure Aroma 150 Yin Ultrasonic Humidifier and Aroma Diffuser
- Power Adapter
- User Manual
Product Components
Familiarize yourself with the main parts of your device:
- Mist Outlet: Where the mist is released.
- Top Cover: Removable cover for accessing the water tank.
- Water Tank: Holds up to 150 ml of water.
- Max Water Level Line: Indicates the maximum fill level.
- Control Buttons: For power, timer, and LED light control.
- Power Inlet: For connecting the power adapter.

Image: A close-up view of the Cecotec Pure Aroma 150 Yin, highlighting the control buttons (1H, 3H, ON, LIGHT) and the illuminated LED band.
Setup
Follow these steps for initial setup:
- Place the Device: Position the diffuser on a flat, stable surface.
- Remove the Cover: Gently lift the top cover to access the water tank.
- Add Water: Fill the water tank with clean tap water up to the maximum water level line (150 ml). Do not overfill.
- Add Essential Oils (Optional): If desired, add 2-3 drops of diluted essential oil directly into the water tank. Do not add more than recommended.
- Replace the Cover: Securely place the top cover back onto the base.
- Connect Power: Plug the power adapter into the power inlet on the device, then plug the adapter into a wall outlet.

Image: A hand carefully pouring water from a measuring cup into the open water tank of the Cecotec Pure Aroma 150 Yin diffuser.
Operating Instructions
Once set up, operate your diffuser using the control buttons:
- Power On/Off: Press the "ON" button once to turn on the mist. Press again to turn off.
- Timer Settings: Press the "1H" button for 1 hour of continuous mist, or the "3H" button for 3 hours. The device will automatically shut off when the timer expires or when the water level is low.
- LED Light Control: Press the "LIGHT" button to cycle through the 7 LED colors. Press once for automatic color cycling. Press again to pause on a specific color. Press and hold to turn off the light function.

Image: The Cecotec Pure Aroma 150 Yin diffuser in operation, emitting a visible mist and glowing with a blue LED light band, placed on a table.
Maintenance
Regular cleaning ensures optimal performance and extends the lifespan of your diffuser:
- Daily Cleaning: After each use, empty any remaining water from the tank. Wipe the inside of the tank with a clean, soft cloth.
- Weekly Cleaning: Unplug the device. Remove the top cover. Add a small amount of white vinegar (about 10 ml) to the water tank and let it sit for 10-15 minutes to dissolve mineral buildup. Gently wipe the inside of the tank and the ultrasonic plate with a soft brush or cotton swab. Rinse thoroughly with clean water, ensuring no water enters the air outlet.
- External Cleaning: Wipe the exterior of the device with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Storage: If not in use for an extended period, clean and dry the device thoroughly, then store it in a cool, dry place.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist is being produced. | Low water level; Device not plugged in; Mist outlet blocked; Ultrasonic plate dirty. | Refill water tank; Check power connection; Clear mist outlet; Clean ultrasonic plate. |
| Weak mist production. | Insufficient water; Mineral buildup on ultrasonic plate. | Ensure water is at optimal level; Clean ultrasonic plate as per maintenance instructions. |
| Device leaks water. | Overfilled water tank; Top cover not properly secured. | Do not exceed max water line; Ensure top cover is correctly placed. |
| Unpleasant odor. | Stale water; Residue from essential oils. | Empty and clean the water tank thoroughly; Use fresh water. |
Specifications
- Model Name: Pure Aroma 150 Yin
- Model Number: 05285
- Capacity: 150 Millilitres
- Power Source: Electric Cable
- Wattage: 7 Watts
- Timer: 1 hour, 3 hours (Automatic Shut-off)
- LED Lights: 7 colors (Manual and Automatic control)
- Coverage Area: Up to 10 square meters
- Material: Plastic
- Dimensions (L x W x H): 14.5 x 13 x 13 cm
- Item Weight: 300 Grams
- Special Features: Diffuser, Silent Operation, Timer
Warranty and Support
For warranty information and customer support, please refer to the official Cecotec website or contact your local retailer. Keep your purchase receipt as proof of purchase for any warranty claims.
For further assistance, you may visit the Cecotec official website.