Model reference
LG NS140HHXEH
Air Conditioner
2 documents29 error codes16 service modes
Available documentation
Service Manual
- System Air Conditioner98 pg
- SYSTEM AIR CONDITIONER Service Manual102 pg
MyPros+ Max
Diagnose your LG NS140HHXEH.
- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
- Verified part numbers when replacement is needed
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Error codes (29)
CodeMeaning
E201Unit quantity miss matching between indoor and outdoor units.E202Abnormal state, no communication between Indoor and Outdoor Main PCB.E2031 minute time out of communication error between Main and Inverter PCB.E221Outdoor temperature sensor error (Open/Short).E231Condenser temperature sensor error (Open/Short).E251Inverter compressor discharge temperature sensor error (Open/Short).E320OLP sensor error (Open/Short).E403Freezing control causes compressor downE404Protection of outdoor overload when compressor stops.E416Discharge over temperatureE440Heating operation is not available since the outdoor air temperature is over…E441Cooling operation is not available since the outdoor air temperature is lower…E458Outdoor unit BLDC Fan 1 error.E461Compressor starting error.E462Current protection control causes compressor downE463OLP protection control caused compressor downE464IPM (IGBT Module) Over Current (O.C) error.E465Compressor over load error.E466DC-Link voltage under/over error.E467Compressor wire missing error.E468Current sensor error.E471Outdoor EEPROM error.E474IPM (IGBT Module) or PFCM temperature sensor error.E475Outdoor unit BLDC Fan 2 error.E484PFC overload error.E500IPM is over heated.E554Gas leak errorE556Capacity mismatch between indoor and outdoor units.E557Option code miss matching among the indoor units (only for DPM).Service modes (16)
- ECO Mode (Power Save - Outdoor Unit)["ECO mode lamp (RED) turns on with BLANK segments displayed."]
- ECO mode (Power save)ECO mode lamp (RED) turns on
- Indoor unit address setting (NS100-155 HHXEH models)Hold down SET and CANCEL buttons on wired remote controller at the same time for 5 seconds
- Indoor Unit Address Setting (NS100/125/140/155)["Hold down the filter and mode buttons at the same time for 5 seconds.","Menu displays
- Indoor Unit Address Setting (NS180)["Press and hold two buttons at the same time for more than 3 seconds until Main menu is…
- Indoor unit address setting (NS180/NS*EG models)Press SET and CANCEL buttons at the same time for more than 3 seconds
- Indoor Unit DIP Option Code Setting (NS100/125/140/155)["Hold down the filter and mode buttons at the same time for 5 seconds.","Menu displays
- Indoor unit installation option setting (NS100-155 HHXEH models)Hold down SET and CANCEL buttons on wired remote controller at the same time for 5 seconds
- Indoor Unit Installation Option Setting (NS180)["Press and hold two buttons at the same time for more than 3 seconds until Main menu is…
- Indoor unit option code setting (NS100-155 HHXEH models)Hold down SET and CANCEL buttons on wired remote controller at the same time for 5 seconds
- Indoor Unit Option Code Setting (NS100/125/140/155)["Hold down two buttons at the same time for 5 seconds.","Menu displays
- Indoor unit option code setting (NS180/NS*EG models)Press SET and CANCEL buttons at the same time for more than 3 seconds
- Outdoor unit test run modePress K1 once for Heating test run, press K1 twice for Defrost test run, press K2 once for Cooling…
- Outdoor unit View modePress K4 on outdoor unit PCB
- Test Run Mode (Outdoor Unit)["Press K1 key once on outdoor PCB for Heating test run.","Press K1 key twice for Defrost test…
- View Mode (Outdoor Unit)["Press K4 key on outdoor PCB repeatedly to cycle through display parameters."]
Full entry steps, exit procedures, and test sequences are available in Max.
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