LG Electronics LA121HPMI, LAU121CNM, LAN121CNM Heating Mode Operation, Defrost Control

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Operation

•While in compressor off, the indoor fan repeats low airflow speed and pause.

•While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehu- midification operation and 4-min compressor off repeat.

Compressor ON Temp. ➲ Setting Temp+0.5°C Compressor OFF Temp. ➲ Setting Temp-0.5°C

•In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.

■Heating Mode Operation

•When the intake air temp reaches +3°C above the setting temp, the compressor is turned off. When reaches the setting temp, the compressor is turned on.

Compressor ON Temp. ➲ Setting Temp. Compressor OFF Temp. ➲ Setting Temp.+3°C

•While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it operates with Super-Low(while in sleep mode, with the medium airflow speed).

•While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it operates with the low airflow speed.

•If overloaded while in heating mode operation, in order to prevent the compressor from OLP opera- tion, the outdoor fan is turned on/off according to the indoor pipe temp.

•While in defrost control, both of the indoor and outdoor fans are turned off.

■Defrost Control

•While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing, reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.

•After 40 min heating mode operation, at 4 min interval, whether to carry out defrost control or not and the time of defrost control are determined according to the following conditions.

1)While in heating mode operation, the maximum of the indoor pipe temperature is measured and it is compared with the present indoor pipe temperature to get the difference of the indoor pipe temper- atures (=the maximum temperature of indoor pipe ? the present temperature of indoor pipe), according to which, whether to carry out defrost control or not is determined.

2)According to the need of defrost control shown above and the elapsed time of heating mode opera- tion at that moment, the defrost control time is determined.

3)When the determined time of defrost control is below 7 min, heating mode operation continues without carrying out defrost control. According to the procedure stated above, the determination is made again. When the defrost control time is 7 min or longer, defrost control is then carried out.

•While in defrost control, the minimum temp of the indoor pipe is measured and it is compared with the present temp of the indoor pipe to get the difference of the indoor pipe temperatures (=the pre- sent temperature of the indoor pipe ? the minimum temperature of the indoor pipe). When the differ- ence is 5°C or higher, defrost control is completed and heating mode operation is carried out.

•While in defrost control, if the defrost time determined before the start of defrost control is complet- ed, defrost control stops and heating mode operation is carried out regardless of the above condi- tion.

•When the indoor pipe temp is 42°C or above, defrost control is not carried out even if the condition is one of the defrost conditions above.

•While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way valve are off.

34Room Air Conditioner

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Contents Room Air Conditioner Table of Contents Do not modify or extend the power cord Safety PrecautionsInstallation Be sure not to do Be sure to follow the instructionOperation Moisture may condense and wet or damage furnishings Keep level even when installing the product Do not direct airflow at room occupants Do not block the inlet or outlet of air flowDo not drink the water drained from the unit DisuseReplace all the batteries in the remote Symbols Used in this Manual DimensionsIndoor Unit Outdoor Unit 12kFeatures IntroductionInstallation Parts InstallationInstallation Tools Installation Map Bushing-SleeveConfirm The Refrigerant This Product Contains R-410A RefrigerantIndoor unit Rooftop InstallationsOutdoor unit Piping Length and Elevation How to Mount Installation Plate Drill a Hole In The WallBurrs removal Flaring WorkCut the pipes and the cable Putting nut onIndoor unit installation Connecting The PipingIndoor Wrap the insulation material around the connecting portion Tighten the flare nut with a wrenchInsert the connecting cable into the indoor unit Indoor unit installationPiping for passage through piping hole Correct case Incorrect caseConnection of The Drain Hose Connection of Piping -OutdoorWiring Diagram Connection of The CableFront panel closing How to use the front panel Front panel openingFront panel removing Checking The Drainage Drain pipingForming The Piping Preparation Air PurgingAir purging With Vacuum Pump Leak testEvacuation Finishing the jobCharging Settlement of outdoor unit Prepare remote controlTest Running Evaluation of the performanceOperation Cooling Mode OperationHealthy Dehumidification Mode Function of ControlsHeating Mode Operation Defrost ControlJet Cool Mode Operation C/O Model Sleep Timer OperationChaos Natural Wind Mode Jet Cool Mode Operation H/P ModelAuto restart Forced operationTest operation Protection of the evaporator pipe from frostingSelf-diagnosis Function Display FunctionHeating Model Remote Control Operations Operation ModeDisassembly To remove the Grille from the ChassisTo remove the Control Box To remove the Motor Cover Cooling Only Models Troubleshooting GuideRefrigeration Cycle Diagram Cooling & Heating ModelsWay, 3-way Valve Way Valve Liquid SideProcedure Pumping DownBalance Refrigerant of the 3-way Valve Vacuum pump Gas Charging After EvacuationAccording to Indoor & Outdoor Temperature Method of using graphMethod of using equation Additional gas chargingCycle Parts Trouble analysisElectronic Parts Product does not operate at allProduct is not operate with the remote controller Compressor/Outdoor Fan are unable to drive When indoor Fan does not operate NectorWhen Vertical Louver does not operate When a comunication error occurs Phenomena in case of connecting error Indoor UnitOutdoor Unit Schematic Diagram Electric Control DeviceOutdoor 12k Wiring Diagram Models 12kModels 12kC/O Models 12kH/P Components Location Outdoor12k 6871A20259D 6871A00087B6871A00088A 6306A90009AProduct Specifications Cooling OnlyCooling & Heating E.R P.EExploded View Outdoor Unit 12k Btu/h Seriess W0CZZReplacement Parts List Parts List IndoorParts List Outdoor No. MFL31443001

LA121HPMI, LAU121CNM, LAN121CNM, LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, LA121CPMO specifications

LG Electronics has established itself as a leader in innovative home appliance technologies, particularly in the air conditioning segment. The LG LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, and LA121CPMO models exemplify the blend of efficiency, comfort, and advanced features that LG is known for.

These air conditioning units are designed with energy efficiency in mind, boasting high SEER (Seasonal Energy Efficiency Ratio) ratings that help reduce electricity consumption. This not only saves money on energy bills but also aligns with eco-friendly initiatives by minimizing environmental impact.

The air conditioners are equipped with LG's Dual Inverter technology, which enhances cooling performance while reducing noise levels. This innovative technology allows the compressor to operate at variable speeds, resulting in faster cooling and dehumidification, as well as quieter operation than traditional units.

Moreover, the models feature a modern aesthetic with sleek designs that seamlessly blend into both residential and commercial environments. The intuitive user interface, combined with remote control capabilities, makes adjusting temperature settings easier for users, giving them full control over their indoor climate.

Another significant characteristic of these models is the use of advanced filtration systems. Many units incorporate a multi-stage filtration process that captures dust, allergens, and pollutants, ensuring the air quality in the home remains high. These filters are easy to clean and replace, making maintenance straightforward and user-friendly.

The LG LAN121CNM, LAU121CNM, and others in the lineup also include Wi-Fi connectivity. This smart technology allows users to monitor and control their air conditioning units through mobile applications, providing convenience and flexibility. Users can adjust settings, schedule operations, and receive alerts about filter maintenance directly from their smartphones.

For those looking for flexibility, these models offer various installation options. They can be installed as wall-mounted, floor-mounted, or ceiling-mounted systems, catering to different space constraints and design preferences.

In conclusion, the LG LAN121CNM, LAU121CNM, LA121HPMI, LA121HPMO, LAN121HNM, LAU121HNM, LA121CPMI, and LA121CPMO air conditioning models are exemplary products that demonstrate LG’s commitment to quality, efficiency, and user-centric design. With cutting-edge technology and a focus on sustainability, these units cater to the needs of modern consumers while ensuring comfort all year round.
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