: Discharge Temperature Error . The discharge temperature has exceeded 130°C, likely due to a faulty discharge thermistor or low refrigerant.
: Indoor Temperature Sensor Error . This usually indicates an open or closed circuit in the indoor air thermistor.
: Indoor Fan Motor Error . The indoor fan is not rotating correctly.
: Input Voltage Error . The CT2 voltage input is too high (above 14 A).
: Outlet Pipe Sensor Error . A fault with the indoor unit's outlet pipe thermistor.
: Inlet Pipe Sensor Error . A fault with the indoor unit's inlet pipe thermistor.
: Outdoor Fan Motor Error . The outdoor fan motor has failed or is blocked.
: Communication Error . Specifically between the evaporator and condenser units. Quick Troubleshooting Steps Troubleshooting LG AC CH05 Error: A Quick Guide - Ftp