LG Dehumidifier P N 3850A20500H Manual

The LG Dehumidifier P N 3850A20500H is a high-performance dehumidification system designed for residential and light commercial use. It features automatic humidity control, multiple fan speeds, continuous drainage option, washable air filter, auto-defrost function, 24-hour timer, and energy-efficient operation. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Operation Modes 7. Maintenance 8. Safety Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital humidity display, water tank full indicator, continuous drainage port, washable filter, casters for mobility, and electronic controls.

Feature	Description
Humidity Control	Automatic humidity sensing and adjustment
Water Tank	Removable bucket with full indicator and auto-shutoff
Continuous Drainage	Garden hose connection for continuous operation
Fan Speeds	Multiple speed settings (Low/Medium/High)
Air Filter	Washable mesh filter for air purification
Auto Defrost	Automatic defrost function for low-temperature operation
Timer	24-hour programmable timer
Energy Efficiency	Energy Star certified operation
Mobility	Built-in casters for easy room-to-room movement
Display	Digital LED display showing humidity and settings

Installation

Unpack and inspect contents. Place on level surface away from walls and furniture.

Remove all packaging materials and protective films.
Place unit on firm, level surface with minimum 12-inch clearance on all sides.
Install casters if not pre-installed.
For continuous drainage: Connect garden hose to drainage port.
Plug into dedicated 120V AC power outlet.

WARNING! Ensure proper ventilation; do not block air intake or exhaust. Use dedicated electrical circuit.

First-Time Setup

Power on dehumidifier; configure initial settings.

Set desired humidity level: Use humidity control buttons (30%-80% RH).
Select fan speed: Choose from Low, Medium, or High settings.
Set timer: Program 24-hour on/off schedule if needed.
Check filter: Ensure air filter is clean and properly installed.
Test operation: Run unit for 15 minutes to verify proper function.

CAUTION! Allow unit to stand upright for 2 hours before first use if transported horizontally.

Specifications

Model: P N 3850A20500H
Capacity: 50 pints per day (at 60% RH, 80°F)
Coverage Area: Up to 1500 square feet
Humidity Range: 30% to 80% RH adjustable
Water Tank Capacity: 2.1 gallons
Fan Speeds: 3 settings (Low/Medium/High)
Power Requirements: 115V, 60Hz, 5.5A
Operating Temperature: 41°F to 95°F
Noise Level: ≤50 dB
Dimensions: 15.4" W × 11.4" D × 24.3" H
Weight: 41.9 lbs

Controls and Settings

Access controls via front panel digital display and button interface.

Control Panel: POWER, HUMIDITY SET, FAN SPEED, TIMER, FILTER RESET, MODE SELECT.

Humidity Control: Set desired humidity level (30%-80% RH). Fan Speed: Low (quiet operation), Medium (balanced), High (maximum dehumidification). Timer: 24-hour programmable on/off schedule. Mode Selection: Continuous, Auto, or Laundry Dry modes. Filter Indicator: Lights when filter needs cleaning. Water Full Indicator: Alerts when tank needs emptying.

Operation Modes

Multiple operating modes for different needs and conditions.

Auto Mode: Automatically maintains set humidity level.
Continuous Mode: Runs continuously regardless of humidity.
Laundry Dry Mode: Optimized for drying laundry in enclosed spaces.
Turbo Mode: Maximum dehumidification for high humidity conditions.
Quiet Mode: Reduced fan speed for nighttime operation.

Tip: Use Auto mode for energy-efficient operation in living spaces.

Maintenance

Regular maintenance ensures optimal performance and longevity.

Water Tank: Empty and clean weekly with mild detergent.
Air Filter: Clean every 2 weeks; replace annually.
Exterior: Wipe with damp cloth as needed.
Coils: Vacuum condenser coils every 3 months.
Drainage System: Flush continuous drain line monthly.

WARNING! Always unplug unit before performing any maintenance.

Safety Features

Built-in safety protections for worry-free operation.

Auto Shutoff: Turns off when water tank is full
Overheat Protection: Prevents compressor damage
Auto Defrost: Prevents coil freezing in low temperatures
Child Lock: Prevents accidental setting changes
Tip-Over Switch: Automatic shutoff if unit tips over

Care & Cleaning

Unplug before cleaning. Use only mild soap and water for cleaning.

Exterior: Wipe with soft, damp cloth. Do not use abrasive cleaners.
Water Tank: Clean with mild detergent and warm water. Rinse thoroughly.
Air Filter: Rinse under running water, allow to dry completely before reinstalling.
Grilles and Vents: Vacuum or wipe clean to maintain airflow.

CAUTION! Never immerse unit in water or use harsh chemicals.

Regulatory Information

UL Listed and Energy Star certified. Complies with FCC Part 15 for electromagnetic interference. Manufactured to meet EPA energy efficiency standards. Copyright © 2024 LG Electronics. For support, visit www.lg.com or contact LG Customer Service at 1-800-243-0000.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit not starting	Power issue/full tank	Check power connection; empty water tank; reset circuit breaker.
Poor dehumidification	Dirty filter/extreme temps	Clean air filter; ensure room temperature above 41°F.
Water leakage	Improper installation	Check tank seating; ensure unit is level; inspect drain hose.
Loud operation	Obstructions/fan issue	Clear obstructions; ensure unit is on level surface.
Display not working	Power/control issue	Check power supply; unplug for 5 minutes then restart.
Ice on coils	Low temperature	Auto-defrost should activate; move to warmer location.

Reset: Unplug for 5 minutes, then restart.

Service: 1-800-243-0000; www.lg.com