LG air conditioners Error Codes - airconditioningmanuals

Error codes for LG industrial air conditioners

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

Error codes for all LG wall-mounted air conditioners, including the Art Cool series

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.

All Error/ Fault Codes for LG Air Conditioner’s

LG Air Conditioner’s: All Error/ Fault Codes (DTC)

Download: LG Air Conditioner’s All Error Codes.pdf (338.3 KB)