KLARSTEIN ACO4-SkytwerGrndSmW
Klarstein Skytower Smart Air Cooler User Manual
Model: ACO4-SkytwerGrndSmW | Brand: KLARSTEIN
1. Important Safety Instructions
Please read these instructions carefully before using the appliance and keep them for future reference. Failure to follow these safety instructions may result in fire, electric shock, or injury.
- Always ensure the appliance is placed on a stable, level surface to prevent tipping.
- Do not immerse the appliance, power cord, or plug in water or other liquids.
- Keep the appliance away from heat sources, direct sunlight, and flammable materials.
- Unplug the appliance from the power outlet before cleaning, filling, or performing any maintenance.
- Do not operate the appliance with a damaged cord or plug, or if it has been dropped or damaged in any way.
- This appliance is for indoor household use only. Do not use it outdoors or for commercial purposes.
- Ensure the voltage indicated on the appliance matches your local power supply before connecting.
- Keep children and pets away from the appliance during operation.
- Do not block the air inlets or outlets. Ensure adequate ventilation around the unit.
2. Product Overview

Figure 2.1: The Klarstein Skytower Smart Air Cooler, a tall white tower unit, shown alongside a smartphone displaying its control application. This image highlights the smart functionality of the device.

Figure 2.2: A close-up of the top of the Klarstein Skytower Smart Air Cooler, detailing the integrated control panel. Text overlays indicate key features such as "Smart," "4-in-1 Function," and "Timer and Night Mode," emphasizing its multi-functionality.
2.1 Components
- Main Unit (Tower Air Cooler)
- Removable Water Tank (8 liters capacity)
- 2 x Cold Packs
- Remote Control
- Power Cord
- User Manual (this document)
- 4 x Integrated Wheels
2.2 Key Features
- 4-in-1 Functionality: Air Cooler, Fan, Air Purifier (Ionizer), and Humidifier.
- Smart Control: Integrated WLAN function for control via the Klarstein app.
- High Air Displacement: Up to 480 m³/h.
- Multiple Speeds: Low, Medium, High.
- Operating Modes: Nature, Sleep, and Normal.
- Horizontal Oscillation: Optional activation for wide air distribution.
- Timer Function: Automatic shutdown, adjustable up to 9 hours.
- Integrated Ionizer: Helps remove dust and odor particles from the air.
- Humidifier Pad Drying Function: Prevents mold formation.
- Low Noise Level: ≤ 60 dB.
- Mobile Design: Equipped with 4 smooth-rolling wheels.
3. Setup
3.1 Unpacking
Carefully remove the appliance and all accessories from the packaging. Retain the packaging for future storage or transport if needed. Inspect the unit for any signs of damage.
3.2 Filling the Water Tank and Using Cold Packs

Figure 3.1: A hand pouring water into the removable 8-liter water tank of the Klarstein Skytower. Two blue cold packs are visible next to the tank, illustrating the process of preparing the unit for enhanced cooling.
- Pull out the water tank from the bottom rear of the unit.
- Fill the tank with clean tap water. Do not exceed the "MAX" fill line.
- For enhanced cooling, place the two included cold packs in a freezer until completely frozen.
- Once frozen, place the cold packs directly into the water tank.
- Carefully slide the water tank back into the unit until it clicks into place.
3.3 Placement

Figure 3.2: The Klarstein Skytower Smart Air Cooler positioned in a modern living room, next to a person reading. This image emphasizes the unit's compact tower design, its mobility thanks to integrated wheels, and its suitability for various room settings, highlighting its quiet operation.
Place the air cooler on a firm, level surface. Ensure there is sufficient space around the unit (at least 20 cm) for proper air circulation. The integrated wheels allow for easy movement between rooms.
4. Operating Instructions
4.1 Power On/Off
Plug the power cord into a suitable electrical outlet (220-240V~, 50Hz). Press the Power button on the control panel or remote control to turn the unit on or off.
4.2 Control Panel and Display
The intuitive touch control panel is located on the top of the unit. The display shows current settings such as speed, mode, and timer.
4.3 Remote Control

Figure 4.1: This image illustrates the versatility of the Klarstein Skytower, showcasing its automatic horizontal and vertical oscillation capabilities, the humidifier pad with a drying function to prevent mold, and the included remote control for convenient operation.
The included remote control allows for convenient operation from a distance. Ensure the remote control is pointed towards the unit's receiver.
4.4 App Control (WLAN Function)

Figure 4.2: A smartphone screen displaying the Klarstein Smart app interface. The app provides comprehensive control over the air cooler, including power, auto mode, sleep mode, temperature display, fan speed adjustment (Low, Medium, High), scheduling, and countdown timer, demonstrating seamless smart home integration.
The Klarstein Skytower Smart Air Cooler features an integrated WLAN function for control via the Klarstein app on your smartphone. This requires a 2.4 GHz Wi-Fi network.
- Download the "Klarstein" app from your smartphone's app store (available on App Store and Google Play).
- Create an account and log in.
- Follow the in-app instructions to connect your air cooler to your home Wi-Fi network.
- Once connected, you can control all functions of the air cooler directly from your smartphone.
4.5 Function Settings
- Speed Adjustment: Press the Speed button to cycle through Low, Medium, and High fan speeds.
- Operating Modes: Press the Mode button to select between:
- Normal Mode: Constant fan speed.
- Nature Mode: Fan speed varies to simulate natural wind.
- Sleep Mode: Similar to Nature mode, with gradual speed reduction for quiet operation during sleep.
- Oscillation: Press the Oscillation button to activate or deactivate the horizontal oscillation feature, which distributes air across a wider area.
- Timer: Press the Timer button to set the automatic shutdown time, adjustable up to 9 hours in 1-hour increments.
- Ionizer: Press the Ionizer button to activate or deactivate the integrated ionizer, which helps purify the air by removing dust and dirt particles.
5. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your Klarstein Skytower Air Cooler.
5.1 Cleaning the Exterior
- Always unplug the appliance before cleaning.
- Wipe the exterior surfaces with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Ensure no water enters the internal components.
5.2 Water Tank Maintenance
- Empty and clean the water tank regularly (at least once a week, or more frequently with heavy use) to prevent mold and bacteria growth.
- Remove the water tank, rinse it with clean water, and wipe it dry.
- If there is scale buildup, use a mild descaling solution suitable for household appliances, following the product instructions.
5.3 Humidifier Pad Drying Function
The appliance features a humidifier pad drying function to prevent mold formation. After using the cooling/humidifying function, activate this feature to dry the pad completely. Refer to the control panel or app for specific instructions on activating this function.
6. Troubleshooting
If you encounter any issues with your Klarstein Skytower Air Cooler, please refer to the table below for common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on. | No power supply; Power button not pressed. | Check if the power cord is securely plugged in. Press the Power button. |
| No cool air. | Water tank empty; Cold packs not frozen or used. | Fill the water tank. Ensure cold packs are frozen and placed in the tank. |
| Weak airflow. | Air inlets/outlets blocked; Fan speed too low. | Clear any obstructions. Increase the fan speed. |
| Unpleasant odor. | Stagnant water in tank; Mold growth. | Empty and thoroughly clean the water tank. Use the humidifier pad drying function after use. |
| Wi-Fi connection issues. | Incorrect Wi-Fi band; App not configured correctly. | Ensure your Wi-Fi is 2.4 GHz. Re-follow app connection instructions. |
| Water leakage. | Water tank not properly inserted; Overfilled tank. | Ensure the water tank is securely in place. Do not overfill past the MAX line. |
7. Specifications

Figure 7.1: A diagram illustrating the dimensions of the Klarstein Skytower Smart Air Cooler. The height is approximately 105 cm, width 30 cm, and depth 26 cm, providing a clear visual reference for its compact tower design.
| Attribute | Value |
|---|---|
| Model Number | ACO4-SkytwerGrndSmW |
| Brand | KLARSTEIN |
| Dimensions (L x W x H) | 30 x 26 x 105 cm |
| Weight | 8 Kilograms |
| Power Consumption | 80 Watts |
| Voltage | 220-240 V~ | 50 Hz |
| Air Flow Capacity | 480 m³/h |
| Noise Level | ≤ 60 dB |
| Water Tank Capacity | 8 Liters |
| Control Type | Touch Panel, Remote Control, App Control |
| Special Features | WLAN Function, Ionizer, Humidifier Pad Drying Function, Oscillation |
8. Warranty and Support
For detailed warranty information and customer support, please refer to the specific warranty card or contact information provided with your product packaging. You may also visit the official Klarstein website for further assistance.