LG AC Error Code List | Split, Inverter, All Codes PDF

Searching for LG AC error code list? This article provides you with a comprehensive list of LG air conditioner fault codes, also known as LG error codes. You can see the error code in your remote control if your LG air conditioner isn’t functioning properly.

The latest LG inverter ACs have a fascinating feature called “Smart Diagnosis.” The machine can self-detect installation and usage errors thanks to this feature. The indoor unit display or the remote control option will flash an error code if there is a problem with the device.

These codes can guide you in identifying the issue and give the AC technician the information they need to determine the best course of action. The error code will appear in the air conditioner if the LG air conditioner you have does not have a remote control.

In this article, we’ll go over some of the error codes that are most frequently seen. Users should note that all LG AC models will not display all these errors.

LG inverter air conditioner error codes:

c1 or ch1	Indoor temperature sensor open or closed circuit
c2 or ch2	Outdoor temperature sensor open or closed circuit
c4 or ch4	Heat sink temperature sensor open or closed circuit
c5 or ch5	Communication indoor and outdoor units
c6 or ch6	Excessive current at inverter DC power circuit
c7 or ch7	Excessive compressor current
c8 or ch8	Indoor fan not rotating
c9 or ch9	Outdoor fan not rotating
ca or ch10	Faulty discharge thermistor
cc	EEPROM error
cd	Inverter module error
po	System in power mode ( not a fault )
lo	System in test mode ( not a fault )

LG AC Indoor Unit Error Code List

Error Code	Description
1	Indoor unit room temperature sensor error
2	Indoor unit inlet pipe sensor error
3	Wired remote control error
4	Float switch error
5	Communication errors between the indoor and outdoor units
6	Indoor unit outlet pipe sensor error
9	Indoor unit EEPROM error
10	Indoor unit BLDC fan motor lock
12	Indoor unit middle pipe sensor error

LG AC Outdoor Unit Error Code List

Error Code	Description
21	DC Peak (IPM) Fault – Compressor DC voltage is too high
22	CT2 (Max  CT) – Alternating current input too high
23	DC Link Low Voltage
25	AC Low/High Voltage
26	DC Comp Position Error (not providing rotation – locking)
27	PSC Fault – Current to inverter compressor between AC and DC converter is too high
28	Inverter Compressor DC voltage is too high
29	Comp Phase Over-current – Inverter compressor amperage is too high
31	Current-to-current transformer (CT) thermistor is too low
32	Inverter Compressor Discharge pipe overheat
34	High-pressure sensor high
35	Low-pressure sensor low
36/38	Refrigerant Leak detection
37	Exceed the compression ration limit
40	CT sensor error – Thermistor is disconnected or shorted out
41	Discharge Pipe sensor error – INV is disconnected or shorted out
42	Low-Pressure sensor error
43	High-Pressure sensor error
44	Outdoor air sensor error – Disconnected or shorted out
45	Condenser middle pipe sensor error – Disconnected or shorted out
46	Suction pipe sensor error – Disconnected or shorted out
48	Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out
51	Excess capacity – Mismatch between IDU and ODU
53	Communication error – between the IDU and ODU
60	Outdoor unit printed circuit board (PCB) EEPROM checksum error
61	Condenser coil temperature is too high
62	Heat sink sensor temperature – high
63	Condenser coil pipe thermistor temperature is low
65	Heat sink thermistor has disconnected or shorted out
67	BLDC motor fan lock
72	Detect 4-way valve transfer failure
93	Communication error

Other LG AC Error Codes:

Error Code	Possible Cause	Solution
Code appears in the display. F1,F2 or F3	Air conditioner is in FAN mode and the number shown is the set fan speed.	This is normal. The air conditioner is working properly.
FL	The water collection tank is full.	Empty the water collection tank.
CH01	Short or open circuit in the indoor air thermistor.	Unplug the air conditioner and contact your authorized LG service center.