LG Corporation, also known as LG Group is a Korean-based multinational corporation that came into being under the name Lucky Goldstar. The company first took off in 1983 and got a complete revamp in 1995, changing its name to LG Corporation. Based in South Korea the corporation was founded by Koo Inhwoi, and managed by his generations to come. What started as a family business now provides energy solutions for more than 80 countries.
Today, LG offers a wide range of air conditioners that are designed keeping top-of-the-line technology and fashion-forward style in mind. Offering you everyday comfort with a simple yet powerful tool in your home or office space. With its wide range of ACs, you are sure to find one that matches your current requirements.
LG ACs are a great choice, but there are times when you may face a minor or major error code in the system. While there is no way of knowing an error may occur, all you can do is handle it in a way that works best for you. Start by noting down the error code, and match it using the list below. Once you have the error code you can easily work your way to the fix. To help you out we have listed down some of the most common error codes for LG ACs.
Split Type AC
|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 between 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||1. Discharge temp more than130 °C 2. Faulty discharge thermistor|
|CD||Inverter module error|
|Po||System in Power Mode – not a fault|
|Lo||System in test mode – not a fault|
Multi Type AC
|01||Air sensor (open/short). Open / Short circuit.|
|02||Inlet pipe sensor. Open / Short circuit.|
|03||Communication(Indoor Wired R/Control). Communication Poorly.|
|04||Drain pump / Float switch. Float switch Open circuit (High level water alarm).|
|05||Communication(Indoor Outdoor). Communication Poorly.|
|06||Outlet pipe sensor. Open / Short circuit.|
|07||Different operation mode. Indoor units set in different operation modes.|
|21||IPM Fault (Compressor Over current). Compressor malfunction, IPM Fault.|
|22||CT 2 (Max. Current). Current is 14A.|
|23||DC Link Low Volt. DC Link volt. Is 140V.|
|24||Low / High Pressure. Low / High press switch OPEN.|
|25||AC Low / AC High Volts. Abnormal AC volt. Input.|
|26||DC Compressor Position.|
|27||PSC Fault (Reactor).|
|28||DC Link High Volts.|
|32||Discharge Pipe Temp. High (INV).|
|33||Discharge Pipe Temp. High (Cons.)|
|41||D-Pipe sensor INV. (Open/Short).|
|44||Air sensor (Open/Short).|
|45||Cond. Pipe Sensor (Open/Short).|
|46||Suction Pipe Sensor (Open/Short).|
|47||D-pipe Sensor Cons. (Open/Short).|
|48||D-Pipe & Air Sensor (Open). Dual Sensor unplugged.|
|51||Over Capacity. Over Load Combination.|
|52||Communication Error (Main micom Sub micom). Poor/Loss of Communication.|
|53||Communication Error (Indoor Outdoor). Poor/Loss of Communication.|
|54||Outdoor 3-Phase Power Supply Reverse Phase / Missing Phase. Incorrect Wiring.|
|60||EEPROM Check Sum. Check Sum Mis-Match.|
|61||Cond. Pipe Sensor Temp. High.|
|62||Heat Sink Sensor Temp. High.|
|63||Cond. Pipe Sensor Temp. Low.|
|65||Heat Sink Sensor (Open/Short).|
|67||Outdoor BLDC Fan Loc. Fan Motor/Circuit Problem.|
|105||Comms. Error (Main board Fan board).|
|HL||High Limit (Float Switch). Same as code 04, Float switch Open circuit.|
|CL||Child Lock Function selected. Not an error, press Timer and Min buttons simultaneously for 3 seconds to toggle On/Off.|
Floor Standing AC
Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning, temperature control, etc.). If Error Code happens in the display of indoor.
|C0||Indoor Air Sensor Open or Short|
|C1||Indoor Pipe Sensor Open or Short|
|C3||Outdoor Air Sensor Open or Short|
|C4||Outdoor Pipe Sensor Open or Short. Checking Point: 1. Check Sensor Connection to PCB whether it's connected well or not. 2. Replace it with new Sensor.|
|C5||Communication failure between Indoor and outdoor unit. Checking Point: 1. Check connecting cable wiring order between Indoor and outdoor diagram. 2. Check all wire connector whether it is connected or not. 3. Indoor AC PCB defects.(short inside). 4. Outdoor PCB defects.(short inside)|
Ceiling Cassette AC
- The function is to self-diagnosis air conditioner and express the troubles identically if there is any trouble.
- Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.
- If more than two troubles occur simultaneously, primarily the highest troubleshooting error code is expressed.
- After error occurrence, if error is released, error LED is also released simultaneously.
- To operate again on the occurrence of error code, be sure to turn off the power and then turn on.
- Having or not of error code is different from Model.
|01||Indoor Room Thermistor Error|
|02||Indoor In-Piping Error|
|03||Remote controller Error|
|04||Drain Pump Error|
|05||Communication Error between In and Out|
|06||Indoor Out-Piping Error|
|21||DC Peak(IPM Fault)|
|23||DC Link Low Volt|
|24||High/Low Pressure/Heatsink Switch|
|25||Low Voltage / Over Voltage|
|26||DC COMP Position Error|
|27||PSC Fault Error|
|28||DC Link High Volt|
|41||INV. D-Pipe Thermistor Error(Open/Short)|
|44||Outdoor Air Thermistor Error(Open/Short)|
|45||Cond Pipe Thermistor Error(Open/Short)|
|46||Suction Pipe Thermistor Error(Open/Short)|
|47||Const. D-Pipe Thermistor Error(Open/Short)|
|60||EEPROM Check Sum Error|
|61||Cond. Pipe High|
|63||Cond. Pipe Low|
|65||Heatsink Thermistor Error(Open/Short)|
|CH 01||Indoor Air Thermistor Error. Indoor air temperature sensor fault is occurred by indoor air temperature ≤ -35℃ or the indoor air temperature ≥ 100°C|
|CH 02||Indoor Coil Thermistor Error. Indoor pipe temperature sensor fault is occurred by indoor pipe temperature ≤ -35℃ or the indoor pipe temperature ≥ 100°C|
|CH 07||Themostat Wiring Error. During operating Remote mode, if PTAC receives control commands that can not be drive from Themostat, Themostat error occurred.|
|CH 09||EEPROM Check Sum Error. EEPROM Check Sum Error is occurred by unmatching between the original checksum and the calculated checksum.|
|CH 10||Indoor Fan Error. Indoor fan lock error is occurred by no feedback signal from Hall sensor located BLDC Motor in 50 seconds delay time or feedback signal lower than 50RPM. (Applied in model using BLDC Motor)|
|CH 34||High Pressure Switch Error. If opening high pressure switch for 65 miliseconds is generated more than 10 times in 1 hour, High Pressure Switch Error occurred.|
|CH 44||Outdoor Air Thermistor Error (PTHP Only). Outdoor air temperature sensor fault is occurred by outdoor air temperature ≤ -35℃ or the indoor air temperature ≥ 100°C|
|CH 45||Outdoor Coil Thermistor Error (PTHP Only). Outdoor pipe temperature sensor fault is occurred by outdoor pipe temperature ≤ -35℃ or the outdoor pipe temperature ≥ 100°C|
|CH 67||Outdoor Fan Error. Outdoor fan lock error is occurred by no feedback signal from Hall sensor located BLDC Motor in 50 seconds delay time or feedback signal lower than 50RPM. (Applied in model using BLDC Motor)|
Portable AC Codes
Before you call for service, review this list. It may save you time and expense. This list includes common occurrences that are not the result of a defect in workmanship or materials.
- FL: The water collection tank is full : Empty the water collection tank. See the care and Cleaning section.
- E1: Short or open circuit in the indoor air thermostat : Unplug the air conditioner and contact your authorized LG service center.
- E2: Short or open circuit in the indoor pipe thermostat : Unplug the air conditioner and contact your authorized LG service center.
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