ARNU18GTAA4 - Air Conditioning LG - Free user manual and instructions
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| Product Type | Ceiling Cassette Air Conditioner |
| Model | ARNU18GTAA4 |
| Cooling Capacity | 18,000 BTU/h (approx. 5.3 kW) |
| Heating Capacity | 18,000 BTU/h (approx. 5.3 kW) |
| Power Supply | 230 V / 50 Hz / 1 Phase |
| Dimensions (Unit) | 840 x 840 x 240 mm (WxDxH) |
| Weight (Unit) | 25 kg |
| Airflow Rate (High) | 600 m³/h |
| Noise Level (Indoor) | 32 dB(A) |
| Refrigerant | R-32 |
| Filter Type | Washable Pre-Filter |
| Control Type | Wired Remote Controller (included) |
| Operation Modes | Cool, Heat, Fan, Dry, Auto |
| Energy Efficiency Ratio (EER) | 3.5 W/W |
| Maintenance | Clean filter every 2 weeks; professional service annually |
| Safety Features | Auto restart, overheat protection, self-diagnosis |
| Spare Parts Availability | 7 years after discontinuation |
| Repairability Index | 8.2 / 10 |
Frequently Asked Questions - ARNU18GTAA4 LG
How do I clean the air filter?
Turn off the unit and unplug it. Open the front panel, remove the filter, vacuum or wash with mild detergent, dry completely, and reinstall. Clean every 2 weeks under normal use.
What does error code 'E1' mean?
Error code E1 indicates a communication fault between indoor and outdoor units. Check wiring connections. If persistent, contact LG service.
Can I install this unit myself?
Installation requires professional skills (refrigerant handling, electrical work). It is recommended to hire a certified technician to ensure safety and warranty.
What is the recommended room size for this model?
The 18,000 BTU/h capacity is suitable for rooms up to 50 m² (540 sq ft) with standard ceiling height.
How do I use the timer function?
On the remote controller, press the Timer button. Set the desired On or Off time using +/- buttons. Confirm with Set.
Does the unit have a heating mode?
Yes, the ARNU18GTAA4 is a heat pump model. It provides both cooling and heating. Press the Mode button to select Heat.
Why is water leaking from the indoor unit?
Check if the filter is dirty, the drain pipe is clogged, or the unit is not level. Clean the filter and ensure proper drainage. If issue persists, call a technician.
How do I reset the remote controller?
Remove the batteries, press all buttons for 2 seconds, reinsert batteries. The remote should reset to default settings.
What type of refrigerant is used?
This model uses R-32 refrigerant, which has lower global warming potential compared to R-410A.
How long is the warranty?
LG typically offers a 2-year warranty on parts and labor for air conditioners. Compressor may have a separate 5-year warranty. Check your region.
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USER MANUAL ARNU18GTAA4 LG
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Product information
Brand : LG
Model : ARNU18GTAA4
Category : Air Conditioning