Installation Guide
Tools Needed:
- Vacuum pump with manifold gauge
- Torque wrench
- Flaring tool set
- Pipe cutter
- Level
- Drill with core bit
- Refrigerant scale
Step-by-Step Installation
- Select Installation Location: Choose a location with proper clearances (minimum 15cm from ceiling, 30cm from walls) and adequate structural support.
- Mount Indoor Unit Bracket: Securely mount the wall bracket using appropriate anchors for wall type (concrete, brick, or drywall).
- Drill Wall Hole: Drill a 70mm hole through the wall with a slight downward slope (indoor to outdoor) for drainage.
- Connect Refrigerant Pipes: Connect copper pipes between indoor and outdoor units using flare connections. Ensure proper insulation on pipes.
- Connect Drain Hose: Install drain hose with proper slope (minimum 1/100 gradient) and route to appropriate drainage point.
- Electrical Connection: Connect power cables according to local electrical codes. Ensure proper grounding and circuit protection.
- Vacuum and Charge: Evacuate system to 500 microns minimum, then charge with specified amount of refrigerant (R32/R410A).
- Test Operation: Test all functions including cooling, heating, fan speeds, and remote control operation.
Specifications
| Model Series | ARNU12GFL4 |
| Type | Split System Air Conditioner |
| Cooling Capacity | 12,000 BTU/h (3.5 kW) |
| Heating Capacity | 13,500 BTU/h (4.0 kW) |
| Energy Efficiency Ratio (EER) | 12.5 |
| Seasonal Energy Efficiency Ratio (SEER) | 22 |
| Refrigerant Type | R32 (Eco-friendly) |
| Power Requirements | 220-240V, 50Hz, 1 Phase |
| Power Consumption (Cooling) | 960W |
| Indoor Unit Dimensions (HxWxD) | 29.5 x 79.8 x 20.9 cm |
| Outdoor Unit Dimensions (HxWxD) | 54.0 x 79.0 x 29.0 cm |
| Noise Level (Indoor/Outdoor) | 19 dB / 50 dB |
| Operating Temperature Range | -15°C to 46°C (Cooling: 18°C to 46°C) |
Warranty Information
- Full Warranty: 2 years parts and labor
- Compressor Warranty: 5 years on inverter compressor
- Extended Warranty: Optional 5-year extended warranty available
For warranty service, contact LG Customer Service at 1-800-243-0000 or visit LG.com
Key Features
Dual Inverter Compressor
LG's advanced Dual Inverter technology provides precise temperature control, faster cooling/heating, and up to 70% energy savings compared to conventional compressors.
4-Way Air Swing
Automatically adjusts vertical and horizontal louvers to distribute air evenly throughout the room, eliminating hot/cold spots.
Plasma Air Purification
Advanced plasma technology removes up to 99.9% of airborne contaminants including bacteria, viruses, allergens, and odors.
SmartThinQ Technology
Wi-Fi enabled for remote control via smartphone app, allowing scheduling, energy monitoring, and voice control compatibility.
Auto Clean Function
Automatically dries the indoor unit's heat exchanger to prevent mold and bacteria growth, maintaining air quality and unit efficiency.
Low Ambient Operation
Specialized technology allows heating operation even in extremely cold temperatures down to -15°C.
Operating Modes
Cool Mode
Standard cooling operation with adjustable temperature (18°C-30°C) and fan speeds
Heat Mode
Heating operation with rapid warm-up feature and anti-cold draft technology
Dry Mode
Dehumidification without excessive cooling, ideal for humid conditions
Fan Mode
Air circulation only with multiple fan speed options
Auto Mode
Intelligent mode that automatically selects cooling or heating based on room temperature
Energy Saving
Optimizes operation to minimize energy consumption while maintaining comfort
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit not turning on | Power outage, circuit breaker tripped, remote control batteries dead | Check power supply, reset circuit breaker, replace remote batteries |
| Poor cooling/heating | Dirty filters, blocked airflow, refrigerant leak, outdoor unit obstructed | Clean filters, clear obstructions, check refrigerant charge |
| Water leaking indoors | Clogged drain pipe, improper installation slope, frozen evaporator | Clear drain line, check installation angle, defrost unit |
| Unusual noises | Loose parts, debris in fan, vibration from mounting | Tighten all fasteners, clear debris, check mounting stability |
| Foul odors | Dirty filters, mold growth in drain pan, stagnant water | Clean filters and drain pan, run fan mode to dry unit |
| Remote not working | Batteries dead, signal blocked, remote sensor issue | Replace batteries, ensure line of sight, check sensor window |
Error Codes
- CH 00: Communication error between indoor and outdoor units
- CH 01: Indoor unit PCB malfunction
- CH 02: Outdoor unit PCB malfunction
- CH 03: Compressor drive error
- CH 04: DC fan motor error
- CH 05: Room temperature sensor error
- CH 06: Pipe temperature sensor error
- CH 07: Outdoor temperature sensor error
- CH 08: Refrigerant pressure error
- CH 09: Drain pump error
Manual Downloads
Current Model Manuals
ARNU12GFL4
12K BTU Wall Mounted Split
ARNU18GFL4
18K BTU Wall Mounted Split
ARNU24GFL4
24K BTU Wall Mounted Split
ARNU09GFL4
9K BTU Wall Mounted Split
Popular Previous Models
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