: DC Link Low Voltage . The DC voltage has dropped below 140V.
: Outlet Pipe Sensor Error . A fault with the indoor unit's outlet pipe thermistor.
: Indoor Fan Motor Error . The indoor fan is not rotating correctly. Lg Inverter Ac Error Codes
: Communication Error . This is one of the most common codes, signifying a communication failure between the indoor and outdoor units. It often requires a technician to check for loose wiring or a faulty PCB.
: Communication Error . Specifically between the evaporator and condenser units. Quick Troubleshooting Steps Troubleshooting LG AC CH05 Error: A Quick Guide - Ftp : DC Link Low Voltage
: Discharge Temperature Error . The discharge temperature has exceeded 130°C, likely due to a faulty discharge thermistor or low refrigerant.
: Input Voltage Error . The CT2 voltage input is too high (above 14 A). A fault with the indoor unit's outlet pipe thermistor
: Inverter/Compressor Error . Points to a problem with the compressor power supply or phase.