Model reference
LG AC120HCADNH
Air Conditioner
1 document41 error codes3 service modes
Available documentation
Service Manual
- SYSTEM AIR CONDITIONER Service Manual55 pg
MyPros+ Max
Diagnose your LG AC120HCADNH.
- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
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Error codes (41)
CodeMeaning
E102Error of Room sensor in the indoor unit (Open/Short).E122Error of EVA-IN or EVA-OUT sensor in the indoor unit (Open/Short).E123Error of Eva In sensor in the indoor unit (Open/Short).E1532nd Detection of the float switch (float switch open).E154Error of Fan motor in the indoor unit.E162EEPROM errorE163EEPROM option setting error.E198Error of Terminal Block's Thermal Fuse (Open).E201Unit quantity mismatch between indoor and outdoor units.E202Abnormal state, no communication between Indoor and Outdoor Main PCB.E2031 minute time out of communication error between Main PCB and Inverter PCB.E221Outdoor temperature sensor error.E231Condenser temperature sensor error.E251Discharge temperature sensor error.E320OLP Sensor Error.E403Detection of outdoor freezing when compressor is stopped.E404Protection of outdoor overload when compressor is stopped.E416Discharge temperature of compressor in outdoor unit is overheated.E422EEV or Valve Close errorE440Heating 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.E462Primary current trip error.E463Over current trip / PFC over current error.E464IPM (IGBT Module) over current error.E465Compressor overload error.E466DC-Link voltage under/over error.E467Compressor wire missing error.E468Current sensor error.View all 41 error codes
E470Outdoor EEPROM error (checksum).E471Outdoor EEPROM error.E474IPM (IGBT Module) or PFCM temperature sensor error.E475Outdoor unit BLDC Fan 2 error.E484PFC Overload Error.E500IPM is overheated.E508Error due to not using Smart Install.E554Gas leak error.E556Capacity mismatch between indoor and outdoor units.E557Option code mismatch among the indoor units (only for DPM).E590Outdoor EEPROM checksum error between MAIN and INVERTER.
Service modes (3)
- Indoor unit address setting["Press the SET and CANCEL buttons at the same time for more than 3 seconds to enter Main…
- Indoor unit installation option setting["Press the SET and CANCEL buttons at the same time for more than 3 seconds to enter Main…
- Indoor unit option code setup["Press the SET and CANCEL buttons at the same time for more than 3 seconds to enter Main…
Full entry steps, exit procedures, and test sequences are available in Max.
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