Levoit Humidifier LUH-A603-WUS Manual

The Levoit LUH-A603-WUS is a 6-liter ultrasonic cool mist humidifier designed for medium to large rooms. It features a 360° nozzle, three mist levels, optional night light, auto mode, timer settings, and a built-in humidity sensor. It operates quietly and includes essential safety features such as automatic shut-off when water runs out or the tank is removed. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 6L Water Tank, 360° Rotating Nozzle, Control Panel, Ultrasonic Mist Outlet, Night Light, Built-in Humidity Sensor, Power Adapter.

Installation & Setup

Unpack and inspect all contents. Place on a flat, stable, and level surface away from walls and electronics.

1. Prepare the humidifier: Remove all packaging materials from the base and tank.
2. Fill the water tank: Carry tank to sink, remove cap, fill with cool tap water (do not exceed MAX line). Replace cap securely.
3. Assemble: Place the filled water tank onto the base, ensuring it sits firmly and evenly.
4. Connect to power: Plug the power adapter into the base unit, then into a standard 120V AC wall outlet.

WARNING! Use only the provided power adapter. Do not place on carpets or uneven surfaces. Keep out of reach of children.

First-Time Use

Power on the humidifier; the display will illuminate.

1. Set desired humidity: Press the HUMIDITY button to cycle between 40%-80% RH (increments of 5%). Auto mode will maintain this level.
2. Select mist level: Press the MIST button to choose Low, Medium, High, or Auto mode.
3. Set timer (optional): Press TIMER to set a shut-off delay from 1 to 12 hours.
4. Adjust night light: Press the LIGHT button to turn the warm white night light On or Off.
5. Rotate the nozzle: Manually adjust the 360° nozzle to direct mist away from walls and furniture.

CAUTION! Use clean, cool tap water. Do not use hot water, essential oils, or additives unless specified as compatible.

Specifications

• Model: LUH-A603-WUS
• Tank Capacity: 6L (1.6 gal)
• Room Coverage: Up to 505 sq ft
• Mist Output: 300-500 mL/hr (adjustable)
• Operating Time: Up to 60 hours on low setting
• Power Consumption: 25W
• Power Source: 120V AC, 60Hz
• Water Tank Material: BPA-Free Plastic
• Noise Level: < 30 dB
• Dimensions (LxWxH): 10.8" x 7.3" x 13.2"
• Weight (Empty): 4.2 lbs

Controls and Settings

Access all functions via the LED touch control panel on the front of the base unit.

Control Panel Buttons: POWER, MIST (Level/Auto), HUMIDITY (Set Target %), TIMER (1-12H), LIGHT (Night Light On/Off).

Display Icons: Current Room Humidity %, Set Humidity Level, Mist Level Indicator (L/M/H/Auto), Timer Countdown, Night Light Icon, Low Water Warning.

Manual Mode: Select Low, Medium, or High mist output. Auto Mode: Humidifier uses built-in sensor to adjust mist output to maintain your set humidity. Timer: Programs unit to turn off after 1-12 hours. Night Light: Provides soft illumination; can be turned off.

Operating Modes

Three manual mist levels and one intelligent auto mode.

1. Low Mist: For quiet operation and extended runtime (up to 60 hrs). Ideal for nighttime or maintaining slight humidity.
2. Medium Mist: Balanced output for general daily use.
3. High Mist: Maximum output for quickly raising humidity in dry conditions.
4. Auto Mode: The unit automatically switches between Low, Medium, and High to maintain the user-set target humidity level (40%-80%).

Tip: Use Auto Mode for hands-free, optimal humidity control. The display shows the current room humidity.

Cleaning & Maintenance

Regular cleaning is essential to prevent mold and mineral buildup. Clean every 1-2 weeks with regular use.

1. Unplug and disassemble: Unplug power, remove water tank from base, and empty any remaining water.
2. Clean the tank: Add 2-3 cups of white vinegar or a manufacturer-recommended cleaner to the tank. Swirl to coat interior. Let sit for 15-20 minutes, then scrub with a soft brush. Rinse thoroughly with clean water.
3. Clean the base: Wipe the base plate (ultrasonic disc) and interior reservoir with a cloth dampened with vinegar or cleaner. Do not submerge the base in water.
4. Dry completely: Allow all parts to air dry completely before reassembling and refilling.
5. Filter (if applicable): This model does not use a wick filter. Cleaning focuses on the tank and ultrasonic components.

WARNING! Never use abrasive cleaners, bleach, or detergents. Do not get the base unit's electronics wet.

Safety Features

Automatic Shut-off: Activates when the water tank is empty or improperly seated, preventing damage to the ultrasonic mechanism. Dry Run Protection: The unit will not operate if the base reservoir is dry. Tip-Over Protection: Not a primary feature; ensure unit is placed on a stable surface.

Care & Storage

When not in use for extended periods, prepare the humidifier for storage.

1. Unplug the unit and empty all water from the tank and base.
2. Clean thoroughly as described in the Cleaning section.
3. Allow all parts to dry completely for at least 24 hours.
4. Reassemble the dry unit and store in its original box in a cool, dry place.

CAUTION! Never store the unit with water inside, as this promotes mold and mineral scale.

Regulatory Information

FCC Part 15: This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Copyright © Levoit. For support, visit www.levoit.com or contact customer service at 1-888-726-8520.

Troubleshooting

Reset: Unplug the unit for 60 seconds, then plug back in to reset the control system.

Service: 1-888-726-8520; www.levoit.com