LG Dehumidifier 3850A20500J Manual

The LG Dehumidifier 3850A20500J is a high-efficiency dehumidification unit designed for residential use, featuring automatic humidity control, continuous drainage option, 24-hour timer, washable filter, auto-defrost function, and energy-saving operation. With a capacity of 50 pints per day, this dehumidifier operates on 115V AC and includes safety features like full bucket alert and auto-shutoff. 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. Connecting Drainage 7. Operating Modes 8. Maintenance Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Digital control panel, Water collection bucket, Continuous drainage port, Washable air filter, Humidity sensor, Casters for mobility.

Feature	Description
Digital control panel	LED display with touch controls
Water collection bucket	Removable 1.8-gallon capacity with handle
Continuous drainage port	For hose connection to drain water automatically
Washable air filter	Reusable filter for easy maintenance
Humidity sensor	Automatic humidity detection and control
Casters	Four wheels for easy room-to-room mobility
Auto-defrost	Prevents coil freezing in low temperatures
24-hour timer	Programmable on/off scheduling
Full bucket alert	LED indicator and auto-shutoff when full
POWER	Turns dehumidifier on/off

Installation

Unpack and inspect contents. Place on level surface.

Position unit: Place on flat, stable surface away from walls and furniture.
Install filter: Ensure washable filter is properly seated in filter compartment.
Check bucket: Verify water collection bucket is securely in place.
Plug into AC power: Use dedicated 115V outlet.

WARNING! Maintain 12-inch clearance around unit for proper airflow. Do not block air vents.

First-Time Setup

Power on dehumidifier; configure initial settings.

Set desired humidity: Press HUMIDITY button to select 35%-85% RH range.
Configure timer: Press TIMER to set automatic on/off schedule.
Select fan speed: Choose LOW or HIGH setting for airflow.
Enable continuous drainage: Connect hose to drainage port if desired.

CAUTION! Ensure unit is upright for 2 hours before first use if transported horizontally.

Specifications

Model: 3850A20500J
Capacity: 50 pints per day @ 65°F, 60% RH
Water Tank: 1.8 gallons removable bucket
Power Source: 115V AC, 60Hz
Amperage: 5.2A
Operating Conditions: 41°F to 95°F
Noise Level: 48 dB on low setting
Dimensions: 15.4" W x 11.4" D x 24.3" H
Weight: 41.9 lbs
Refrigerant: R410A

Controls and Settings

Access controls via digital panel. Front Panel: POWER, HUMIDITY SET, FAN SPEED, TIMER, FILTER RESET.

Display Indicators: Current humidity, Set humidity, Timer status, Filter alert, Full bucket alert, Defrost mode.

Humidity Control: Adjust between 35%-85% RH in 5% increments. Fan Speed: LOW for quiet operation, HIGH for maximum dehumidification. Timer: 24-hour programmable on/off cycles. Filter Reset: Reset after cleaning filter. Continuous Mode: Runs continuously until bucket full or manually stopped.

Connecting Drainage

Continuous drainage option for unattended operation.

Turn off and unplug dehumidifier.
Remove drainage port cover from rear of unit.
Connect standard garden hose (5/8" diameter) to drainage port.
Route hose to floor drain or suitable drainage location.
Ensure hose has downward slope for proper water flow.

Tip: Use hose clamp to secure connection and prevent leaks.

Operating Modes

Multiple operation modes for different needs.

Auto Mode: Unit automatically maintains set humidity level.
Continuous Mode: Runs continuously for maximum moisture removal.
Timer Mode: Programmed operation for specific time periods.
Laundry Mode: Enhanced drying for laundry rooms.
Smart Mode: Energy-saving operation based on room conditions.

WARNING! Do not operate in temperatures below 41°F to prevent coil freezing.

Maintenance Features

Filter Alert: LED indicator when filter needs cleaning. Auto-Defrost: Prevents ice buildup on evaporator coils. Full Bucket Protection: Auto-shutoff and alert when bucket needs emptying.

Care & Cleaning

Unplug before cleaning. Clean filter every 2 weeks or as needed.

Filter Cleaning: Remove filter, rinse with warm water, air dry completely before reinstalling.
Bucket Cleaning: Empty and clean with mild detergent monthly.
Exterior Cleaning: Wipe with damp cloth; do not use harsh chemicals.
Coil Cleaning: Vacuum coils annually for optimal performance.

CAUTION! Never immerse unit in water. Ensure filter is completely dry before reinstallation.

Regulatory Information

UL Listed: Meets UL 474 safety standards. Energy Star: Certified for energy efficiency. FCC Part 15: Class B digital device compliance. Copyright © 2023 LG Electronics; trademarks of LG Corp. For support, visit www.lg.com or contact 1-800-243-0000.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit not starting	Power/bucket full	Check power connection; empty water bucket; reset filter light.
Poor dehumidification	Filter/door closed	Clean filter; ensure room doors/windows closed; check temperature.
Water leakage	Bucket/drainage	Ensure bucket properly seated; check drainage hose connection.
Loud operation	Surface/obstruction	Place on level surface; check for foreign objects in fan.
Ice on coils	Low temperature	Auto-defrost should activate; move to warmer area if below 41°F.

Reset: Unplug for 5 minutes then restart.

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