: Communication Error . Specifically between the evaporator and condenser units. Quick Troubleshooting Steps Troubleshooting LG AC CH05 Error: A Quick Guide - Ftp
: Indoor Fan Motor Error . The indoor fan is not rotating correctly.
: Outlet Pipe Sensor Error . A fault with the indoor unit's outlet pipe thermistor.
: DC Link Low Voltage . The DC voltage has dropped below 140V.
: Inlet Pipe Sensor Error . A fault with the indoor unit's inlet pipe thermistor.
: Indoor Temperature Sensor Error . This usually indicates an open or closed circuit in the indoor air thermistor.
: Compressor Overheating . The discharge pipe temperature is too high.
: Input Voltage Error . The CT2 voltage input is too high (above 14 A).