Levoit Humidifier LUH-A603-KUS Manual

The Levoit Humidifier LUH-A603-KUS is a top-fill ultrasonic humidifier designed for medium to large rooms. It features a 6-liter (1.6 gallon) tank, 360° nozzle, adjustable mist levels, optional warm mist, essential oil diffuser tray, night light, auto shut-off, and a built-in humidity sensor. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 6L Top-Fill Tank, 360° Rotating Nozzle, Control Panel, Essential Oil Tray, Water Level Window, Night Light, Built-in Handle.

Installation & Setup

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

1. Remove all packaging materials from tank and base.
2. Separate water tank from base by lifting the tank handle.
3. Fill tank: Open top cap, fill with cool, clean tap or distilled water (max line).
4. Reassemble: Place tank back onto base, ensuring it sits securely.
5. Plug power adapter into base unit and then into a 120V AC outlet.

WARNING! Use only clean, cool water. Do not use hot water or add oils directly into water tank. Place on a waterproof surface.

First-Time Use

Power on humidifier; follow control panel prompts.

1. Press POWER button to turn on; default is Cool Mist mode.
2. Select mist level: Press MIST button to cycle through Low, Medium, High, and Auto.
3. Set humidity target (Auto mode): Use +/- buttons to set desired humidity (40%-60% recommended).
4. Activate timer: Press TIMER, then use +/- to set hours (1-12).
5. Toggle night light: Press LIGHT button to turn on/off.
6. For warm mist: Press WARM MIST button (if available in your model).

CAUTION! Ensure tank is properly seated before operation. Do not operate without water.

Specifications

• Model: LUH-A603-KUS
• Tank Capacity: 6 liters (1.6 gallons)
• Room Coverage: Up to 753 sq ft (70 m²)
• Run Time: Up to 60 hours (low mist setting)
• Mist Output: Up to 500 mL/hr
• Mist Types: Cool Mist, Warm Mist (optional)
• Noise Level: ≤ 30 dB (low setting)
• Power Supply: 120V AC, 60Hz, 24W
• Dimensions: 11.8" x 11.8" x 17.3" (30 x 30 x 44 cm)
• Weight: 8.8 lbs (4 kg) empty

Controls and Settings

Access all functions via the touch control panel on the unit or remote control (if included).

Control Panel: POWER, MIST (Low/Med/High/Auto), TIMER, HUMIDITY (+/-), LIGHT, WARM MIST.

Display Icons: Power, Mist Level, Timer, Humidity Set Point, Night Light, Warm Mist, Water Drop (low water).

Settings Overview: Mist Level (adjust output), Humidity Set (40%-80%), Timer (1-12hr), Night Light (On/Off), Warm Mist (On/Off), Auto Mode (maintains set humidity).

Operation Modes

Cool Mist Mode: Default setting; uses ultrasonic vibration to produce fine cool mist. Ideal for general use.

Warm Mist Mode: Heats water before misting; can help reduce bacteria and provide comfort in cold weather. Press WARM MIST button to activate.

Auto Mode: Built-in sensor detects room humidity and adjusts mist output to maintain your set target (use +/- to set between 40%-80%).

Manual Mode: Choose Low, Medium, or High mist output regardless of room humidity.

Timer Mode: Set unit to run for 1-12 hours then automatically power off.

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup. Unplug before cleaning.

1. Daily: Empty and refill tank with fresh water if not used for >24 hours.
2. Weekly Cleaning:
   • Disassemble: Remove tank, water base, and nozzle.
   • Clean tank and base with mild soap and soft cloth; rinse thoroughly.
   • Use provided cleaning brush for hard-to-reach areas.
   • Wipe ultrasonic transducer (silver disk) gently with damp cloth.
3. Monthly Deep Clean: Use white vinegar solution (1 cup vinegar to 1 gallon water) to soak tank and base for 20 minutes to descale. Rinse well.
4. Drying: Allow all parts to air dry completely before reassembly.

CAUTION! Never immerse base unit in water. Do not use abrasive cleaners or brushes.

Essential Oil Usage

Use only with the dedicated essential oil tray. Do not add oils directly to water tank.

1. Ensure humidifier is off and unplugged.
2. Pull out the essential oil tray (located near control panel).
3. Add 3-5 drops of 100% pure essential oil onto the tray.
4. Slide tray back into slot.
5. Operate humidifier as normal; aroma will diffuse with mist.

WARNING! Using oils directly in water can damage the unit and void warranty. Clean oil tray after each use.

Safety Information

• Use only with provided power adapter.
• Place on a flat, stable, waterproof surface.
• Keep out of reach of children and pets.
• Do not operate without water in tank.
• Do not cover mist outlet or block air vents.
• Unplug before cleaning, filling, or moving.
• Use only clean, cool tap or distilled water.
• Do not add medications or chemicals to water.
• If using warm mist, keep away from flammable materials.
• Discontinue use if unusual noise, odor, or leakage occurs.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Levoit. For support, visit www.levoit.com or contact 1-888-726-8520. This product is covered by a 2-year limited warranty. Register your product online for warranty validation.

Troubleshooting

Reset: Unplug unit for 2 minutes, then restart. For persistent issues, contact customer service.

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