LG Split System Air Conditioner Error Codes

LG Air Conditioner Error Codes Explained. If your LG air conditioner starts showing error codes on the remote control or the LED panel on the unit, it means there’s a problem. Each error code identifies a specific issue with the air conditioner. Understanding these error codes helps you pinpoint what’s wrong, whether it’s something that needs fixing, cleaning, or replacing. This knowledge can save you money by tackling the problem yourself.

LG Split System Air Conditioner Error Codes – Troubleshooting – Maintenance

When there is a fault or error in your LG AC unit a 2, 3 or 4 digit code will show on the remote control led display. If your LG AC unit does not have a remote control that came with the unit, then the 2, 3 or 4 digit error code will display on the LED panel on the front of the indoor unit.

LG AC Location of LEDs

When more than two errors happen at the same time in an LG air conditioner, the display will show the error with the lower number first. The most common issues are indicated by the first three LG AC error codes, which is why they are mentioned at the beginning and in a non-sequential order. These issues are identified by flashing lights and include codes CH05 and CH10.

To fix a flashing light error on your LG air conditioner:

1. Turn off the AC’s circuit breaker, then turn it back on.
2. If connections are secure, the air conditioner should work properly.
3. Check for any loose connections in the wiring.

A blinking light may also mean the air conditioner is low on refrigerant.

C5 or CH05

The C5 or CH05 error code in an LG Split System Air Conditioner points to a problem with the communication between the indoor and outdoor units. This issue prevents the indoor unit from operating correctly and is identified by the indoor unit’s light flashing five times.

CA or CH10

When you see the CA or CH10 error code on your LG Split System Air Conditioner, it means the discharge temperature has surpassed 130 °C. This problem is usually caused by a malfunctioning discharge thermistor. Despite this significant issue, the indoor unit will keep running, but the light will blink 10 times to indicate the error.

LG Air Conditioner Parts To Fix Error Codes

C1 or CH01

The C1 or CH01 error code on an LG Split System Air Conditioner signals a problem with the indoor temperature sensor, potentially caused by either an open or closed circuit. This issue is highlighted by the system’s light flashing once and the error being prominently displayed on the indoor unit’s display. Even with this fault, the indoor unit remains operational.

C2 or CH02

The C2 or CH02 error code indicates a malfunction with the outdoor temperature sensor on an LG Split System Air Conditioner, either due to an open or closed circuit. This error pertains to an issue with the outdoor air or piping temperature thermistor. Despite the error, which is signaled by the light flashing twice and displayed on both indoor and outdoor units, the indoor unit will continue to function.

C3 or CH03

The C3 or CH03 error code on an LG Split System Air Conditioner is indicative of a communication issue with the indoor wired remote control, pointing to a data communication fault. This problem is signaled by the system’s light flashing three times. Despite this communication error, the specifics of the indoor unit operation aren’t provided, suggesting that the error’s impact might vary depending on the condition.

C4 or CH04

The C4 or CH04 error code in an LG Split System Air Conditioner identifies a malfunction with the heat-sink temperature sensor, which could be due to an open or closed circuit. This error is indicated by the system’s light flashing four times, and the issue is displayed on both the indoor and outdoor units’ displays. Despite this error, the indoor unit will continue to operate, ensuring continued functionality even with the fault present.

C5 or CH05

The C5 or CH05 error code for an LG Split System Air Conditioner highlights a communication issue between the indoor and outdoor units. This error is signaled by the system’s light flashing five times and is displayed on both the indoor and outdoor units. Due to this communication problem, the indoor unit will cease operation.

C6 or CH06

The C6 or CH06 error code indicates a problem with excessive current in the inverter’s DC power circuit, specifically referring to DC Peak Power, in an LG Split System Air Conditioner. This condition is shown by the system’s light flashing six times and the error appearing on both the indoor and outdoor displays. As a result of this issue, the indoor unit will go into shutdown mode to prevent further damage.

C7 or CH07

The C7 or CH07 error code on an LG Split System Air Conditioner points to an issue of excessive current being drawn by the compressor. This problem is indicated by the system’s light flashing seven times and the error being displayed on both the indoor and outdoor units. As a protective measure, the indoor unit will automatically shut down to prevent any potential damage from the excessive current.

C8 or CH08

The C8 or CH08 error code signifies a problem with the indoor fan of an LG Split System Air Conditioner, specifically that it is not rotating. This issue is highlighted by the system’s light flashing eight times, with the error displayed on the indoor unit. Due to this malfunction, the indoor unit will stop operating to avoid any further issues or damage.

C9 or CH09

The C9 or CH09 error code indicates a malfunction with the outdoor fan of an LG Split System Air Conditioner, where it is not rotating. This issue is signaled by the system’s light flashing nine times and the error appearing on both the indoor and outdoor units’ displays. Consequently, the indoor unit will cease operation, reflecting a system-wide precaution to address the outdoor fan’s non-operation.

CA or CH10

The CA or CH10 error code on an LG Split System Air Conditioner indicates that the discharge temperature has exceeded 130 °C, pointing to a malfunctioning discharge thermistor. This condition is signaled by the system’s light flashing ten times, with the error shown on both the indoor and outdoor unit displays. Despite this critical error, the indoor unit will continue to operate, indicating the system’s ability to maintain some functionality even with the fault present.

Flashing CH32

A flashing CH32 error code on an LG Split System Air Conditioner suggests that the discharge temperature is excessively high. This condition could be due to the unit being low on refrigerant or a blockage in airflow, such as a dirty coil or air filter. This error is displayed on the indoor unit, emphasizing the need for a check on refrigerant levels or the cleanliness of air pathways to ensure proper functioning.

CC

The CC error code is associated with an EEPROM error in an LG Split System Air Conditioner. This issue is indicated by a unique flashing light pattern of 2+1 and is displayed on the outdoor unit. Despite this error, which pertains to the electronic programming of the unit, the indoor unit remains operational, suggesting that the system can continue to function while requiring attention to resolve the EEPROM issue.

CD

The CD error code in an LG Split System Air Conditioner points to a problem with the inverter module. This malfunction is indicated by a flashing light sequence of 3+1 and the error is displayed on the outdoor unit. Despite this inverter module error, the indoor unit will continue to operate, suggesting the system can still provide some level of service while needing repairs for the inverter issue.

CL

The CL error code on an LG Split System Air Conditioner represents the activation of the Child Lock Function and is not indicative of a malfunction. To toggle this feature On or Off, press the Timer and Min buttons simultaneously for 3 seconds. The indoor unit status remains On, highlighting that this code is merely a function alert rather than an error needing troubleshooting.

HL

An HL error code signifies a High Limit (Float Switch) problem in an LG Split System Air Conditioner, specifically an open circuit in the float switch. This issue causes the indoor unit to switch Off as a safety precaution, preventing potential water damage or overflow issues associated with the drainage system.

Po

The Po error code on an LG Split System Air Conditioner indicates that the system is in Power Mode, which is not a fault but rather a mode of operation. This status is displayed on the indoor unit, reassuring users that the system is functioning correctly and the code is simply providing information on the current operational mode.

Lo

The Lo error code on an LG Split System Air Conditioner indicates that the system is in test mode, which is not a fault condition. This mode is used for diagnostic purposes and is displayed on the indoor unit, informing the user that the system is undergoing testing rather than experiencing operational issues.

01

The 01 error code signifies a problem with the air sensor in an LG Split System Air Conditioner, specifically an open or short circuit. This malfunction causes the indoor unit to turn off as a precautionary measure, preventing the system from operating without accurate temperature readings from the air sensor.

02

An 02 error code in an LG Split System Air Conditioner points to an issue with the inlet pipe sensor, indicating an open or short circuit. Like the air sensor issue, this sensor problem leads to the indoor unit being turned off to avoid operating under potentially harmful conditions without accurate temperature measurements.

03

The 03 error code highlights a communication issue with the indoor wired remote control in an LG Split System Air Conditioner. This communication problem results in the indoor unit being turned off, as the system cannot operate correctly without effective communication between its components.

04

The 04 error code on an LG Split System Air Conditioner indicates a problem with the drain pump or float switch, specifically an open circuit due to the float switch detecting high water levels (High level water alarm). This condition leads to the indoor unit being turned off to prevent water overflow and potential damage.

05

An 05 error code in an LG Split System Air Conditioner signals a communication issue between the indoor and outdoor units. This communication problem causes the indoor unit to shut off as the system cannot operate efficiently without a stable connection between these critical components.

06

The 06 error code highlights an issue with the outlet pipe sensor in an LG Split System Air Conditioner, pointing to an open or short circuit. This sensor malfunction results in the indoor unit being turned off to avoid operating under unsafe conditions without proper temperature control.

07

An 07 error code signifies that there is a discrepancy in operation modes among indoor units in an LG Split System Air Conditioner, indicating they are set in different operation modes. This lack of uniformity causes the indoor units to turn off, as the system requires a consistent mode of operation across all units for optimal performance.

21

The 21 error code indicates a serious issue in an LG Split System Air Conditioner, specifically with compressor over-current, which points to a compressor malfunction or an Intelligent Power Module (IPM) fault. This condition is signified by the LED01G flashing red two times and LED02G flashing green once. Due to this fault, the outdoor unit will be turned off to prevent damage to the compressor or further electrical issues.

22

The 22 error code on an LG Split System Air Conditioner refers to a CT 2 Max. Current issue, indicating that the current has reached 14A, which is considered too high for safe operation. This condition is signaled by LED01G flashing red two times and LED02G flashing green two times. As a result of this overcurrent, the outdoor unit will automatically turn off to protect the system from potential damage due to excessive electrical load.

23

An 23 error code in an LG Split System Air Conditioner points to a DC Link Low Volt problem, meaning the DC Link voltage has dropped below the acceptable level. This voltage issue is indicated by LED01G flashing red two times and LED02G flashing green three times. To prevent damage to the electrical components and ensure safe operation, the outdoor unit is shut off when this error occurs.

24

The 24 error code highlights a Low / High Pressure issue in an LG Split System Air Conditioner, with the low / high press switch being open. This indicates that the pressure within the system is either too low or too high, which can cause operational issues or damage to the unit. This fault is signified by LED01G flashing red two times and LED02G flashing green four times. To safeguard the system and maintain safety, the outdoor unit will be turned off until the pressure issue is resolved.

25

The 25 error code for an LG Split System Air Conditioner is related to an AC Low / AC High Voltage issue, indicating an abnormal AC voltage input. This could mean the voltage is either too low or too high for the system’s normal operation. It is indicated by LED01G flashing red two times and LED02G flashing green five times. Due to this voltage irregularity, the outdoor unit will be turned off to prevent damage to the system or ensure safety.

26

An 26 error code in an LG Split System Air Conditioner points to a DC Compressor Position problem. This error suggests an issue with the positioning system of the DC compressor, crucial for its efficient operation. The fault is signaled by LED01G flashing red two times and LED02G flashing green six times. To avoid potential damage to the compressor or further system issues, the outdoor unit is shut off when this error is detected.

27

The 27 error code signifies a PSC Fault (Reactor) in an LG Split System Air Conditioner. PSC stands for Permanent Split Capacitor, and a fault in this component or the reactor can significantly affect the system’s operation. This condition is indicated by LED01G flashing red two times and LED02G flashing green seven times. The outdoor unit is turned off in response to this fault to protect the system from any consequential damage that could arise from operating with a faulty reactor.

28

The 28 error code on an LG Split System Air Conditioner indicates a DC Link High Volts issue, with the DC Link Voltage reaching 420V, which is above the normal operating range. This high voltage condition is signaled by LED01G flashing red two times and LED02G flashing green eight times. To prevent damage to the electrical components or ensure the safety of the system, the outdoor unit will be turned off when this error occurs.

32

An 32 error code in an LG Split System Air Conditioner points to a Discharge Pipe Temp High (INV) problem, indicating that the temperature of the discharge pipe is excessively high in the inverter system. This overheating is indicated by LED01G flashing red three times and LED02G flashing green two times. The outdoor unit is shut off to protect the system from potential damage due to overheating and to ensure safe operation.

33

The 33 error code signifies a Discharge Pipe Temp High (Cons) issue in an LG Split System Air Conditioner, meaning the temperature of the discharge pipe has become excessively high in a constant speed (non-inverter) system. This condition is marked by LED01G flashing red three times and LED02G flashing green three times. Similar to other high-temperature issues, the outdoor unit will be turned off to prevent damage from overheating and to maintain the system’s safety.

40

The 40 error code for an LG Split System Air Conditioner is associated with a CT Circuit malfunction, indicating an issue within the current transformer circuit, which is crucial for monitoring and regulating the electrical current in the system. This malfunction is signaled by LED01G flashing red four times, and as a result of this electrical issue, the outdoor unit will be turned off to prevent any potential damage or safety hazards.

41

An 41 error code in an LG Split System Air Conditioner points to a problem with the D-Pipe sensor INV (Inverter), specifically an open or short circuit. This sensor plays a key role in monitoring the refrigerant temperature in the inverter system, and its malfunction can significantly affect the air conditioner’s performance. The fault is indicated by LED01G flashing red four times and LED02G flashing green once. To safeguard the system and ensure proper operation, the outdoor unit is shut off when this error is detected.

44

The 44 error code signifies an issue with the air sensor, namely an open or short circuit, in an LG Split System Air Conditioner. The air sensor is essential for measuring the indoor air temperature to regulate the cooling or heating effectively. This sensor issue is marked by LED01G flashing red four times and LED02G flashing green four times. Due to the critical role of this sensor in ensuring optimal climate control, the outdoor unit will be turned off to address the malfunction and maintain the system’s integrity.

45

The 45 error code on an LG Split System Air Conditioner indicates a malfunction with the Condenser Pipe Sensor, specifically an open or short circuit. This sensor is crucial for monitoring the temperature of the refrigerant in the condenser pipe. The issue is indicated by LED01G flashing red four times and LED02G flashing green five times. Due to this sensor problem, the outdoor unit is turned off to prevent any potential damage or inefficiency in the cooling process.

46

An 46 error code in an LG Split System Air Conditioner points to a problem with the Suction Pipe Sensor, again an open or short circuit. The suction pipe sensor plays a vital role in measuring the temperature of the refrigerant in the suction line, affecting the system’s cooling performance. This error is signaled by LED01G flashing red four times and LED02G flashing green six times. The outdoor unit is shut off as a precautionary measure to address the sensor malfunction and ensure the system’s safety.

47

The 47 error code signifies an issue with the D-pipe Sensor for constant speed (Cons) systems, specifically an open or short circuit. This sensor is important for monitoring the refrigerant temperature within the D-pipe in non-inverter (constant speed) air conditioning units. The malfunction is indicated by LED01G flashing red four times and LED02G flashing green seven times. To prevent further issues and maintain operational integrity, the outdoor unit will be turned off until the sensor issue is resolved.

48

The 48 error code for an LG Split System Air Conditioner is identified when there is an issue with the D-Pipe & Air Sensor, specifically when this dual sensor is unplugged or open. This sensor is essential for accurately measuring both the refrigerant temperature and the indoor air temperature, ensuring the system’s efficient operation. The fault is indicated by LED01G flashing red four times and LED02G flashing green eight times, leading to the outdoor unit being turned off to prevent operation without accurate temperature monitoring.

51

An 51 error code indicates an Over Capacity issue in an LG Split System Air Conditioner, referring to an Over Load Combination. This suggests that the system is operating beyond its designed capacity, which can lead to inefficiency or potential damage. The condition is signaled by LED01G flashing red five times and LED02G flashing green once. As a precaution, the outdoor unit is turned off to address the overload and prevent damage to the system components.

52

The 52 error code signifies a Communication Error between the Main micom and Sub micom in an LG Split System Air Conditioner, pointing to poor or a loss of communication. These microcontrollers are crucial for the operation of the air conditioner, coordinating between various components for efficient functioning. The error is marked by LED01G flashing red five times and LED02G flashing green two times. Due to this communication issue, the outdoor unit is turned off to prevent misoperation or damage resulting from incorrect or lost signals.

53

The 53 error code on an LG Split System Air Conditioner highlights a Communication Error between the indoor and outdoor units, indicating poor or a loss of communication. Effective communication between these units is essential for synchronized operation and efficiency. This fault is represented by LED01G flashing red five times and LED02G flashing green three times. Due to this communication breakdown, the outdoor unit is turned off to prevent any operational errors that could arise from miscommunication.

54

An 54 error code in an LG Split System Air Conditioner points to a problem with the Outdoor 3-Phase Power Supply, specifically a Reverse Phase or Missing Phase, indicating Incorrect Wiring. Correct phase sequence and complete phase presence are crucial for the stable and efficient operation of the air conditioner, especially in systems requiring a 3-phase supply. This wiring issue is signaled by LED01G flashing red five times and LED02G flashing green four times. The outdoor unit is shut off as a safety measure to prevent damage from incorrect electrical supply.

60

The 60 error code signifies an EEPROM Check Sum error in an LG Split System Air Conditioner, which occurs due to a Check Sum Mismatch. The EEPROM is integral for storing the system’s operational firmware and settings; a checksum mismatch indicates that the data has been corrupted or altered in an unexpected way. This condition is indicated by LED01G flashing red six times. As a result of this error, the outdoor unit is turned off to avoid operation based on potentially corrupted configuration data, necessitating a repair or reset to restore proper function.

61

The 61 error code for an LG Split System Air Conditioner indicates a high temperature issue with the Condenser Pipe Sensor, specifically that the condenser temperature is too high. This could suggest overheating within the condenser unit, affecting the system’s ability to efficiently release heat from the refrigerant. This condition is signaled by LED01G flashing red six times and LED02G flashing green once. Due to this high temperature, the outdoor unit is turned off to prevent damage to the system or reduce the risk of malfunction.

62

An 62 error code in an LG Split System Air Conditioner points to a high temperature condition detected by the Heat-Sink Sensor. The heat-sink is critical for dissipating heat from the electronic components, and a high temperature reading can indicate excessive heat buildup, potentially jeopardizing the system’s electronic integrity. This overheating issue is marked by LED01G flashing red six times and LED02G flashing green two times. To avoid damage to the electronics, the outdoor unit is shut off when this error is encountered.

63

The 63 error code signifies a low temperature condition detected by the Condenser Pipe Sensor in an LG Split System Air Conditioner. This code suggests that the temperature of the refrigerant in the condenser pipe is unusually low, which could impact the system’s heating efficiency or indicate a refrigerant flow issue. Interestingly, this code appears to share the same LED indicator pattern (LED01G flashing red six times and LED02G flashing green two times) as the 62 error code, which may be a typo. In cases of low temperature, the outdoor unit is also turned off to prevent operation under potentially harmful conditions.

65

The 65 error code on an LG Split System Air Conditioner indicates a malfunction with the Heat-Sink Sensor, specifically an open or short circuit. This sensor is crucial for monitoring the temperature of the heat sink, which dissipates heat from the air conditioner’s electronic components. An open or short circuit in this sensor can lead to improper functioning of the cooling system, as the unit may not be able to accurately detect and manage the temperature. The issue is signaled by LED01G flashing red six times and LED02G flashing green five times. To prevent damage or inefficiency, the outdoor unit is turned off until the sensor can be repaired or replaced.

67

An 67 error code signifies a problem with the Outdoor BLDC Fan, specifically a Fan Lock condition, indicating a fan motor or circuit problem. The BLDC (Brushless DC) fan is essential for cooling the outdoor unit’s condenser coils, and a lock or malfunction can significantly impact the air conditioner’s efficiency and safety. This condition is marked by LED01G flashing red six times and LED02G flashing green seven times. Due to the critical nature of the fan’s operation, the outdoor unit is shut off to prevent overheating and potential damage.

105

The 105 error code in an LG Split System Air Conditioner is identified as a Communication Error between the Main board and the Fan board, indicating poor or a loss of communication. Effective communication between these boards is vital for the coordinated operation of the air conditioner, ensuring that fan speeds and cooling functions are properly managed. This communication error is also indicated by LED01G flashing red six times and LED02G flashing green five times, similar to the 65 error code, suggesting a potential typographical error in the documentation or a shared indicator for different faults. The outdoor unit is turned off to prevent misoperation due to the communication breakdown.

LG AC Split System Error Charts and Lists
LG Split System Air Conditioner Error Indicators

LG Split System Air Conditioner Error Codes 1

LG Split System Air Conditioner Error Codes 2

LG Split System Air Conditioner Error Codes 3

LG AC Inverter Error Charts and Lists

LG Inverter Air Conditioner Error Codes 1

LG Inverter Air Conditioner Error Codes 2

DOWNLOAD: LG Air Conditioner Split System Error Codes PDF File

LG Split Air Conditioners: CH38 Error Code

LG Air Conditioning: How To Use The Remote Control

LG Air Conditioners: Split AC Filter Cleaning

Need more help after reading the full article? Let us know what type of help you need by using the comments below. We look forward to assisting you.

Written by Keith Schneerer

Certified Appliance Tech · Founder, RemoveAndReplace.com

Keith has spent 30+ years repairing machines, starting as a military mechanic and later maintaining food processing equipment before moving into appliance repair. He founded RemoveAndReplace.com to share field-tested repair advice.

More about Keith →