LG Split AC Error Code List PDF

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File name	LG Split AC Error Code List PDF
No. of Pages	19
File size	388 KB
Date Added	May 15, 2023
Category	Technology
Language	English
Source/Credits	Drive Files

LG Split AC Error Code List Summary

LG Corporation, a multinational conglomerate corporation, was established in Busan, South Korea on January 5, 1947, by Koo In-Hwoi. The company’s headquarters is currently located in Seoul, South Korea. As of December 2021, the company has a workforce of 259,915 employees. Popular subsidiaries of LG Corporation include LG Electronics, LG Uplus, LG Chem, LG CNS, among others. If you are using an LG air conditioner, it is advisable to refer to the LG Split AC Error Code List PDF to better understand any potential errors.

LG Air Conditioner Error Codes – The Complete List:

Indoor Unit Faults

Error Code	Possible Cause
		1	Indoor unit room temperature sensor error
2	Indoor unit inlet pipe sensor error
4	Float switch error (optional)
5	Communication error between indoor unit and outdoor units
6	Indoor unit outlet pipe sensor error
9	Indoor unit EPROM error
10	Indoor unit BLDC motor fan lock
12	Indoor unit middle pipe sensor error

Outdoor Unit Faults

Error Code	Possible Cause
		21	DC Peak (IPM Fault); Compressor DC voltage was too high
22	Current Transformed (CT2) error; Alternating current (AC) input too high
23	DC Link Low Volt
25	AC Low/High Volt
26	DC Comp Position Error (not providing rotation), Locking
27	PSC Fault; Current to inverter compressor between AC and DC converter circuit too high
28	Inverter compressor DC voltage is too high
29	Inverter compressor amperage is too high
31	Current-to-current transformer (CT) thermistor is too low
32	Inverter Compressor Discharge Pipe (D-Pipe) Overheat
40	CT Sensor Error; Thermistor is disconnected or shorted out
41	D-Pipe Sensor INV is disconnected or shorted out
44	Outdoor Air Sensor is disconnected or shorted out
45	Middle thermistor of outdoor unit condenser coil is disconnected or shorted out
46	Outdoor unit suction line thermistor is disconnected or shorted out
48	Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out
53	Communication failure from outdoor unit to indoor unit
60	Outdoor unit printed circuit board (PCB) EPROM check sum error
61	Outdoor unit condenser coil temperature is too high
62	Outdoor unit inverter compressor PCB heat sink temperature is too high
63	Condenser coil pipe thermistor temperature is too low
65	Heat sink thermistor has disconnected or has shorted out
67	Outdoor brushless direct current (BLDC) fan motor lock error

‍LED Error Codes

Error Code	Description	LED 01G/M (Red)	LED 01G/M (Red)	Possible Cause
					21	DC Link Peak (IPM Fault)	2 times 3	1 times 3	Over Rated Current
22	CT 2 (Max CT)	2 times 3	Input Over Current
23	DC Link Low Volt. DC Link High Volt.	3 times 3	DC Link Volt is below 140Vdc DC Link Volt is above 420Vdc
25	Low Voltage/Over Voltage	5 times 3	Abnormal AC Volt Input
26	DC Compressor Position Error	6 times 3	Compressor Starting Fall Error
27	PSC/PFC Fault Error	7 times 3	Over Inverter PCB input current
29	COMP Over Current	9 times 3	Over Inverter Compressor Current
32	D-Pipe High	3 times 3	2 times 3	D-Pipe Temp. High
35	Low Pressure Error		5 times 3	Excessive decrease of Low Pressure
39	Communication Error		9 times 3	Communication Error Between PFC Micom and INV Micom
40	CT Sensor (Open/Short)	4 times 3	0	CT Circuit Malfunction
41	INV. D-Pipe Th Error		1 times 3	Open/Short
43	High Pressure Sensor Error		3 times 3
44	Outdoor Air Th Error		4 times 3
45	Cond. Mid-Pipe Th Error		5 times 3
46	Suction Pipe Th Error		6 times 3
48	Cond. Out-Pipe Th Error		8 times 3
51	Capacity Over	5 times 3	1 times 3	Over combination
53	Signal Error (Indoor <-> Outdoor)		3 times 3	Communication Poorly
54	3-Phase Wrong wiring		4 times 3	3-Phase Wrong Wring of Outdoor Unit (Reverse Phase/Omission of Phase)
60	EEPROM Check Sum Error	6 times 3	0	Check Sum Mismatching
61	Cond. Pipe Th High		1 times 3	Cond. Temp. High
62	Heat sink Th High		2 times 3	Heatsink Temp. High
65	Heat sink Th Error		5 times 3	Open/Short
67	Outdoor BLDC Fan Lock		7 times 3	Outdoor Fan is not operation
73	PFC Fault Error(SAN)	7 times 3	3 times 3	Over Current of Outdoor Unit PFC

‍Error Codes with Possible Causes

Error Code	Possible Cause	Indicator	Operating State
					2		Outdoor TH. is short or open.	The operating LED will be blinking twice.	Keep operating state.
4	Temp. of Heat sink is over 95°C. Heat sink TH. is short or open.	The operating LED will be blinking 4 times.	Restart compressor when Heat sink Temp is 85°C below.
5	Communication error (serial communication).	The operating LED will be blinking 5 times.	The operation is off (enable to restart by remote controller).
6	DC peak error.	The operating LED will be blinking 6 times.	Compressor will be turned off immediately (not enable to restart by remote controller)
7	Running current is overloaded.	The operating LED will be blinking 7 times.	Compressor will be turned off immediately (not enable to restart by remote controller)
9	Outdoor fan lock error (BLDC fan model)	The operating LED will be blinking 9 times.	The operation is off (enable to restart by remote controller).
10	D-PIPE TH is short or open.	The operating LED will be blinking 10 times.	Compressor will be turned off immediately (restart compressor when D-PIPE TH. is recovered)

Error Code	Possible Cause	Check/Repair	Shop Parts
				1	Temperature sensor failure	Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the temperature sensor wire harness. Replace the temperature sensor if it’s defective.	Temperature sensor, Wire harness, Electronic control board
E2	Failure in the indoor temperature sensor	Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the indoor temperature sensor wire harness. Replace the indoor temperature sensor if it’s defective.	Indoor temperature sensor, Wire harness, Electronic control board
E3	Abnormal operation protection error		Indoor temperature sensor, Wire harness, Electronic control board
E3		Clean or replace filters if dirty. Unplug the window air conditioner and check all components for visible damage. Check fan blades for damage or obstructions and replace any damaged fan blades. Check all wire harness connections. Replace any damaged wire harnesses.	Filter, Fan blade, Fan motor, Wire harness
E4 (Portable A/C only)	The air conditioner is in the defrost mode	After the air conditioner exits defrost mode and resume normal operation, check the unit to see if it’s cooling properly. If so, then the E4 code is normal. If the portable air conditioner frequently goes into the defrost mode and isn’t cooling properly, check the air filters and clean or replace filters if dirty.	Filter
P2 or FL (Portable A/C only)	The water collection tank is full	Empty the water collection tank. If the P2 or FL code appears when the tank is empty, replace the float switch or sensor in the collection tank.	Collection tank float switch or sensor

‍Error Codes with Description

Error Code	Function Name	Description
			01 h	Read Coil Status	Run/Stop(status), Lock(status), Swing(status), Alarm, Filter Sign(status), Mode Lock(status), Wind Flow Lock(status)
03h	Read Holding Registers	Operation Mode(status), Fan Speed(status), Room Temperature, Error Code, Set Room Temperature(status), Set Lower Temperature(status), Set Upper Temperature(status), User Mode(status)
05h	Force Single Coil	Run/Stop(setting), Lock(setting), Swing(setting), Filter Sign Reset, Mode Lock(setting), Wind Flow Lock(setting)
06h	Preset Single Registers	Operation Mode(setting), Fan Speed(setting), Set Room Temperature(setting), Set Lower Temperature(setting), Set Upper Temperature(setting), User Mode(setting)

Other 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.

LG Split AC Error Code List PDF Download Link