LG air conditioners Error Codes

See also: LG air conditioners Service Manuals

Indoor unit:

• 01 - air temperature sensor short-circuited or open circuit;
• 02 - evaporator temperature sensor short-circuited or open circuit;
• 03 - poor connection of the indoor unit with a wired control panel;
• 04 - error of the drainage pump (pump) or float condensate level sensor;
• 05 - error in the interblock connection of the external and internal blocks;
• 06 - outdoor unit temperature sensor short-circuited or open circuit;
• 07 - the internal blocks of the multisystem are included in different operating modes;
• HL - same error as 04, float sensor open;
• CL - a child’s lock is installed; to turn it on, press Timer & Min Buttons for 3 seconds;
• Po - jet cool mode is set, press jet cool to exit

External unit:

• 21 - compressor overload current;
• 22 - compressor current more than 14 A;
• 23 - DC voltage below 140 V; (not the supply voltage, but after the conversion module)
• 24 - error on high / low pressure, pressure sensors are open;
• 25 - supply voltage above / below the normal value;
• 26 - DC Compressor Position;
• 27 - error PSC (reactor, inductor);
• 28 - DC Link High Volts;
• 32 - High temperature discharge pipe (INV);
• 33 - High temperature discharge pipe (Cons.);
• 40 - short circuit CT;
• 41 - temperature sensor D-Pipe closed / disconnected (INV);
• 44 - the outdoor temperature sensor is closed / torn;
• 45 - capacitor temperature sensor closed / torn;
• 46 - the sensor on the suction tube is closed / torn off;
• 47 - D-pipe sensor closed / broken;
• 48 - D-pipe sensor and air temperature sensor missing / broken;
• 51 - combined power overload;
• 52 - connection error (main micom-sub micom);
• 53 - connection error (indoor-outdoor units);
• 54 - for systems with 3-phase power supply, incorrect phase sequence, change phase;
• 60 - EEPROM error (internal non-volatile memory)
• 61 - high temperature condenser tube (condenser)
• 62 - high temperature of the radiator (most likely the radiator is cooling the power module of the inverter)
• 63 - low condenser temperature
• 65 - radiator temperature sensor short-circuited
• 67 - blocked external BLDC (brushless DC motor) fan
• 105 - no communication between the main control board and the fan control board

• C1 or CH1 - the internal air temperature sensor is short-circuited or open in the circuit;
• C2 or CH2 - evaporator temperature sensor short-circuited or open circuit;
• C4 or CH4 - the condenser temperature sensor is short-circuited or open in the circuit;
• C5 or CH5 - connection between the external and internal units;
• C6 or CH6 - current in the inverter module circuit is exceeded;
• C7 or CH7 - compressor current is exceeded;
• C8 or CH8 - the fan of the indoor unit does not rotate;
• C9 or CH9 - the fan of the external unit does not rotate;
• C10 or CH-10 - the thermistor for monitoring the temperature of the compressor housing of the split system is faulty (open or short circuit)
• CA - discharge temperature above 130 0С;
• CC - error EEPROM (internal non-volatile memory);
• CD - error in the inverter module;
• CE
• Po - the system is in energy-saving mode, there is no error;
• Lo - the system is in test mode, there is no error;

If there is no error code, and the LED indicators on the panel blink, you need to download the full version of the error code, there is also a graph of the temperature sensor resistance versus temperature.