LG air conditioner error codes
Indicator lamps and blink codes
By model series
All codes
1Indoor room temperature thermistor open/short; Indoor pipe temperature thermistor open/short2Indoor unit inlet pipe thermistor has disconnected or has shorted out5Communication failure from indoor unit to outdoor unit6Indoor unit outlet pipe thermistor has disconnected or has shorted out9Indoor unit EEPROM error01Air sensor (open/short)02Inlet pipe sensor03Communication(Indoor ↔ Wired R/Control)04Drain pump / Float switch05Communication(Indoor ↔ Outdoor)06Outlet pipe sensor07Different operation mode09Checksum Error10BLDC Motor Fan Lock (Indoor)12Indoor unit middle pipe thermistor has disconnected or has shorted out21IPM Fault (Compressor Over current)22CT 2 (Max. Current)23DC Link Low Volt24Low / High Pressure25AC Low / ACHigh Volts26DC Compressor Position27PSC Fault (Reactor)28DC Link High Volts29COMP Over Current31Current to the current transformer (CT) thermistor is too low32Discharge Pipe Temp. High (INV)33Discharge Pipe Temp. High (Cons.)39Communication Error40CT Circuit41D-Pipe sensor INV. (Open/Short)44Air sensor (Open/Short)45Cond. Pipe Sensor (Open/Short)46Suction Pipe Sensor (Open/Short)47D-pipe Sensor Cons. (Open/Short)48D-Pipe & Air Sensor (Open)51Over Capacity52Communication Error (Main micom ↔ Sub micom)53Communication Error (Indoor ↔ Outdoor)54Outdoor 3-Phase Power Supply Reverse Phase / Missing Phase60EEPROMCheck Sum61Cond. Pipe Sensor Temp. High62Heat Sink Sensor Temp. High63Cond. Pipe Sensor Temp. Low65Heat Sink Sensor (Open/Short)67Outdoor BLDC Fan Lock73PFC Fault Error (S/W)CLChild Lock Function selectedHLHard Lock (Controlled by External Source)POJet Cool Mode selected105Comms. Error (Main board ↔Fan board)