LG Air Conditioning

97 fault codes documented

01

Error 01 - Indoor air sensor open or short circuit

The indoor unit's air sensor has detected an open or short circuit, meaning it's not functioning correctly.

02

Error 02 - Inlet pipe sensor open or short circuit

The inlet pipe sensor in the indoor unit has an open or short circuit, indicating a malfunction.

03

Error 03 - Communication error between indoor unit and wired remote

There is poor communication between the indoor unit and its wired remote controller.

05

Error 05 - Communication error between indoor and outdoor units

This code indicates a communication fault between the indoor and outdoor units. It appears approximately 5 minutes after powering up the system.

06

Error 06 - Outlet pipe sensor open or short circuit

The outlet pipe sensor in the indoor unit is experiencing an open or short circuit, indicating it's not functioning correctly.

07

Error 07 - Different operation modes selected

This fault occurs when different indoor units within the same system are set to operate in conflicting modes (e.g., one cooling, one heating).

09

Error 09 - Checksum Error / PCB defect

This indicates a checksum error, usually caused by a defective main PCB or issues with EEPROM connections.

10

Error 10 - Indoor fan motor issue

This code relates to a problem with the indoor fan motor. Refer to fault code 67 for specific troubleshooting steps.

105

Error 105 - Communication error between main and fan PCBs

This fault indicates a communication breakdown between the main outdoor unit PCB and the fan PCB.

21

2 flashes, 1 beep - IPM Fault (Compressor Over current)

This code indicates a problem with the compressor, specifically an over-current issue detected by the IPM (Intelligent Power Module). The outdoor unit is likely malfunctioning.

22

2 flashes, 2 beeps - CT 2 (Max. Current) reached

This fault means the current measured by Current Transformer 2 has reached its maximum limit of 14A. This could indicate an issue with the compressor or electrical system drawing too much power.

23

2 flashes, 3 beeps - DC Link Low Voltage

This code signifies that the DC Link voltage has dropped too low, to 140V or below. This can affect the performance and stability of the inverter system.

24

2 flashes, 4 beeps - Low / High Pressure Switch Activated

This indicates that either the low or high-pressure switch has been activated, meaning the system pressure is outside of its normal operating range. This could be due to refrigerant issues or airflow problems.

25

2 flashes, 5 beeps - AC Low / AC High Voltage

This error code means the AC input voltage to the unit is abnormal, either too low or too high. This could be a problem with the building's electrical supply or internal power components.

26

2 flashes, 6 beeps - DC Compressor Position Fault

This code indicates an issue with the position detection of the DC compressor. The system cannot accurately determine the compressor's rotational position.

27

2 flashes, 7 beeps - PSC Fault (Reactor)

This code relates to a fault with the PSC (Power Smoothing Circuit) or the reactor component. This is part of the inverter's power conditioning system.

28

2 flashes, 8 beeps - DC Link High Voltage

This error indicates that the DC Link voltage within the inverter system has become too high. This can be caused by issues with the power supply or internal components.

29

2 flashes, 9 beeps - Compressor Over Current

This fault code signifies that the inverter compressor's input current has exceeded 30A. This is a protection mechanism to prevent damage to the compressor.

32

3 flashes, 2 beeps - Discharge Pipe Temperature High (Inverter)

This error indicates that the discharge pipe temperature for the inverter compressor has exceeded 105°C. This often points to a refrigerant issue or restricted airflow.

33

3 flashes, 3 beeps - Discharge Pipe Temperature High (Conventional)

This fault code indicates that the discharge pipe temperature for a conventional compressor has exceeded 105°C. Similar to the inverter version, this usually relates to refrigerant or airflow problems.

39

3 flashes, 9 beeps - Communication Error Between PFC and INV PCBs

This code indicates a loss of communication between the PFC (Power Factor Correction) board and the INV (Inverter) PCB. This prevents the different parts of the system from working together correctly.

40

4 flashes - CT Circuit Malfunction

This error code points to a malfunction within the Current Transformer (CT) circuit. This circuit is responsible for measuring electrical current, and a fault here can disrupt system operation.

41

4 flashes, 1 beep - D-pipe Sensor INV. (Open/Short)

This indicates an issue with the discharge pipe sensor on the inverter model. The sensor is either disconnected (open) or has a short circuit, preventing accurate temperature readings.

44

4 flashes, 4 beeps - Air Sensor (Open/Short)

This code signifies a fault with the air sensor, which is either disconnected (open) or short-circuited. This sensor monitors the ambient air temperature.

45

4 flashes, 5 beeps - Cond. Pipe Sensor (Open/Short)

This error indicates a problem with the condenser pipe sensor. The sensor is either not connected (open) or has a short circuit, affecting temperature monitoring.

46

4 flashes, 6 beeps - Suction Pipe Sensor (Open/Short)

This fault indicates an issue with the suction pipe sensor, which is either disconnected (open) or short-circuited. This sensor monitors refrigerant temperature in the suction line.

47

4 flashes, 7 beeps - D-pipe Sensor Cons. (Open/Short)

This fault code signifies an issue with the discharge pipe sensor on a conventional (non-inverter) compressor. The sensor is either disconnected (open) or short-circuited.

48

4 flashes, 8 beeps - Dual Sensor Unplugged

This code indicates that both the discharge pipe and air sensors are disconnected or have faulty connections. The system cannot get readings from these critical temperature points.

51

5 flashes, 1 beep - Over Capacity

This fault code indicates that the system is operating under an overload condition, often referred to as 'Over Load Combination'. This means the unit is trying to do more than its designed capacity.

52

5 flashes, 2 beeps - Communication Error (Main micom ↔ Sub micom)

This error signifies a communication breakdown between the main microcontroller (micom) and a sub-micom within the system. This prevents proper data exchange and control.

53

5 flashes, 3 beeps - Communication Error (Indoor ↔ Outdoor)

This fault indicates a loss of communication between the indoor unit and the outdoor unit. This prevents the system from operating correctly.

54

5 flashes, 4 beeps - Outdoor 3-Phase Power Supply Reverse Phase / Missing Phase

This error means the 3-phase power supply to the outdoor unit is incorrect, either with the phases reversed or one phase missing. This can cause damage to the compressor and motor.

60

6 flashes - EEPROM Check Sum Mismatch

This fault indicates that the data stored in the EEPROM (memory chip) has become corrupted or does not match the expected values. This can affect system settings and operation.

61

6 flashes, 1 beep - Condenser Pipe Sensor Temperature High

This indicates that the temperature sensor on the condenser pipe is reading a temperature that is too high. This can be due to poor airflow or refrigerant issues.

62

6 flashes, 2 beeps - Heat Sink Sensor Temperature High

This code means the temperature sensor on the heat sink of the inverter has detected a temperature that is too high. This indicates a potential overheating issue within the inverter.

63

6 flashes, 3 beeps - Condenser Pipe Sensor Temperature Low

This fault code indicates that the condenser pipe sensor is reading a temperature that is too low. This could be due to refrigerant issues or sensor malfunction.

65

6 flashes, 5 beeps - Heat Sink Sensor (Open/Short)

This indicates a fault with the heat sink sensor, which is either disconnected (open) or short-circuited. This sensor monitors the temperature of the inverter's heat sink.

67

Error 67 - Outdoor fan motor not rotating

This code indicates that the outdoor fan motor is not detected as rotating, which could be due to a mechanical or electrical failure.

73

Error 73 - System overload or component failure

This error code indicates potential issues such as system overload, damage to components, abnormal input voltage, or a faulty inverter PCB.

ANTI BACTERIAL glows

Anti Bacterial light glows — Anti Bacterial option selected

This light indicates that the Anti Bacterial option has been selected. This option uses high temperature during the cycle to reduce bacteria.

Advertencia: Si no todo el aire es purgado fuera de la línea de gas, el encendedor podría apagarse antes de que el gas y el quemador principal se hayan encendido.

Encendedor se apaga y reintenta encender el quemador (secadora a gas)

Si el aire no se purga completamente de la línea de gas, el encendedor puede apagarse antes de que el gas encienda el quemador principal. La secadora intentará encender el gas de nuevo después de aproximadamente dos minutos.

Air conditioner does not emit warm air

No warm air emitted — Waiting for heating or defrosting mode

When starting in Heating Mode, the unit may not immediately emit warm air. This can be normal as the system warms up or if the outdoor unit is in a defrosting cycle.

Air conditioner does not work

Air conditioner does not work — Power supply or remote issue

The air conditioner is not functioning. This could be due to a lack of power, a tripped circuit breaker, or an issue with the remote control's batteries.

Auto Restart disabled confirmation

Unit beeps twice and lamp blinks 4 times — Auto Restart disabled

This specific audible and visual signal confirms that the Auto Restart function has been turned off. The unit will not automatically resume previous settings after a power interruption.

BEEPER light on

Beeper light on — Audible signals are active

The Beeper light indicates that audible signals, such as button presses and cycle completion alerts, are active. The volume can be adjusted or turned off.

Beeps twice, lamp blinks twice 4 times

Beeps twice, lamp blinks twice 4 times — Auto Restart function disabled

This audible and visual cue confirms that the Auto Restart function has been turned off. The air conditioner will not resume its previous settings after a power outage.

Burning smell and strange sounds

Burning smell and strange sounds — Potential electrical issue

A burning smell or unusual noises coming from the unit indicate a serious problem, possibly related to electrical components. Immediate action is required.

CH04

CH04 - Float switch activated or drain pump issue

This code indicates the float switch in the fan coil unit has risen due to high water level. If the unit lacks a drain pump, it means a jumper plug is missing from the drain terminal.

CH05

CH05 - Communication error between indoor and outdoor units

This code signifies a communication problem between the indoor and outdoor units, appearing about 5 minutes after the system powers up. The communication signal is a fluctuating DC voltage.

CH07

CH07 - Conflicting cooling and heating modes

This code appears on multi-split systems when the main unit is set to one mode (cooling or heating) but a connected slave unit is set to the opposite mode. The first unit turned on acts as the 'master'.

CL

CL - Child Lock Function Selected

The Child Lock function is active, preventing changes to the unit's settings via the remote controller. This is not an error.

Child Lock glows

Child Lock LED glows — Child Lock is active

When Child Lock is enabled, the Child Lock indicator light will illuminate. All buttons on the control panel will be locked.

Clean Filter Indicator Light

Clean Filter light is on — Lint filter needs cleaning

The 'Clean Filter' indicator light illuminates to remind you to clean the lint filter. A clogged lint filter can reduce drying efficiency and increase drying times.

Clean Filter flashes

Clean Filter flashing — Lint filter needs cleaning

The Clean Filter indicator will flash when the dryer is powered on, and stops flashing once the start/pause button is pressed. It is a reminder to clean the lint filter for optimal performance.

Clothes are shrinking

Clothes are shrinking — Garment care instructions not followed

Some fabrics naturally shrink when washed or dried. Following the garment's specific care instructions is crucial to prevent shrinkage.

Clothes are wrinkled

Clothes are wrinkled — Delayed removal from dryer

Leaving clothes in the dryer after the cycle has finished can cause wrinkles to form and set.

DAMP DRY BEEP light glows

Damp Dry Beep light glows — Damp Dry Beep option selected

This light indicates the Damp Dry Beep option is active. You will hear a beep when the load is approximately 80% dry, allowing you to remove items that might be fully dry or need ironing.

DRY LEVEL lights glow

Dry Level lights glow — Dryness level selected

These lights indicate the selected dryness level for Sensor Dry Cycles. You can choose how dry you want the clothes to be.

Door alignment

Door does not close or open properly

If the door and hinge are not aligned in the center when closing, the door may not close or open correctly. This can be an issue after reversing the door swing.

Dryer does not heat

Dryer does not heat — Gas supply issue

For gas dryers, a lack of heat can occur if the gas supply is shut off or blocked.

Dryer does not start

Dryer does not start — Fuse blown or circuit breaker tripped

The dryer may tumble but not heat, or not start at all, if a fuse is blown or the circuit breaker has tripped.

Dryer overheating

Dryer overheating — Potential damage or fire risk

Overheating can occur due to loose electrical connections or if the dryer is connected to an incorrect circuit. Ensure proper wiring and secure connections.

Drying time inconsistent

Drying time inconsistent — Heat settings or load sizes vary

Drying time can fluctuate due to inconsistent heat settings, load sizes, fabric types, or the condition of the dryer's exhaust system.

Drying time too long

Drying time too long — Underloaded dryer

Drying too few items can sometimes lead to longer drying times because there isn't enough mass for proper tumbling and heat distribution.

Error code

Error code displayed — Unit malfunction detected

The air conditioner has detected an error through its self-diagnosis function and is displaying an error code. This indicates a specific issue that needs to be addressed.

Excessive vibration

Excessive vibration — Noise and vibration may result

If the leveling feet or locknuts are not properly tightened, or if screws are not installed correctly, it can lead to noise and vibration during operation.

Gas dryer not igniting

Gas dryer not igniting — Gas igniter may go off

If air is not purged from the gas line before ignition, the gas igniter may shut off before the main burner ignites. The system will attempt to re-ignite.

Greasy spots on clothes

Greasy spots on clothes — Stains from washing process

Greasy spots might be residual stains from the washing process that were not fully removed before drying.

HL

HL - Hard Lock (Controlled by External Source)

This status indicates the unit is being controlled by an external source, such as a dry contact or a central controller, not directly by its remote.

Incorrect electrical connection

Incorrect electrical connection — Risk of damage, fire, or shock

Connecting the dryer to an incorrect voltage circuit or improper wiring can cause serious injury, fire, or damage to the dryer. Ensure the wiring and grounding conform to local codes and the appliance's requirements.

Incorrect venting

Incorrect venting — Undesirable drying performance or fire risk

Improperly installed or taped vents, or using the wrong type of ducting, can lead to poor drying performance and create a fire hazard. The dryer must be vented to the outdoors.

Indoor unit discharging mist

Indoor unit discharging mist — Normal condensation in cool air

The air conditioner is discharging mist from the indoor unit. This is a normal phenomenon when the cooled air from the unit causes condensation as the room temperature decreases.

Indoor unit gives off an odor

Indoor unit gives off an odor — Absorbed odors or filter needs cleaning

The indoor unit is emitting an odor, which may be due to odors absorbed into the unit over time, such as cigarette smoke. Cleaning the filter is often the solution.

Lamp blinks twice 4 times

Lamp blinks twice, 4 times — Auto Restart function disabled

This blinking pattern indicates that the Auto Restart function has been successfully disabled. The unit will not automatically restore previous settings after a power failure.

Lint on clothes

Lint on clothes — Foreign material in load

Small items like tissues or paper left in pockets can break apart and create excess lint.

Loose connection

Loose connection — Heating failure or fire risk

If screws are not tightened properly, or if the wire is not connected securely to the terminal block, it can cause connection errors. This may result in product damage, heating failure, or even fire.

NOTA: El cable de color debería conectarse a los tornillos del mismo color.

Conexión de cable incorrecta al bloque terminal

Si el cable de alimentación no se conecta al tornillo del mismo color en el bloque terminal, esto puede causar una corriente excesiva, daños al producto o un fallo en la calefacción.

NOTA: Puede haber ruido y vibración si las tuercas no están aseguradas.

Ruido y vibración si las tuercas de nivelación no están aseguradas

Si las tuercas de las patas niveladoras del pedestal no están bien aseguradas, la secadora o lavadora puede experimentar ruido y vibración excesiva durante su funcionamiento.

NOTA: Si los tornillos no se instalan de manera adecuada, es posible que se produzcan ruidos y vibraciones.

Ruidos y vibraciones por tornillos mal instalados en el pedestal

Si los tornillos que fijan el electrodoméstico al pedestal no se instalan correctamente, esto puede causar ruidos inusuales y vibraciones durante el funcionamiento.

Normal operating sounds

Clicking, creaking, flowing, or blowing sounds — Normal operation

Certain sounds like clicking, creaking, flowing, or blowing are normal during operation. These are usually due to the movement of internal parts or the flow of refrigerant.

Not Level

Dryer is not level — Laundry may not tumble properly and sensors may malfunction

If the dryer is not level, the laundry may not tumble correctly. This can also cause the internal sensors to not detect humidity accurately.

Nota: Si hay objetos extraños en la superficie de la placa superior, será difícil aplicar dobles burletes.

Dificultad para aplicar burletes por objetos extraños

Si la superficie superior de la secadora o lavadora tiene objetos extraños, será difícil adherir correctamente los burletes. Esto puede afectar la instalación de accesorios apilables.

Po

Po - Jet Cool Mode Selected

The Jet Cool mode is activated, which rapidly cools the room. This is a normal operating mode, not an error.

Poor drying performance

Poor drying performance or lint buildup

The drying performance can be affected by issues with the exhaust vent system. Lint buildup, incorrect vent material, or improper installation can lead to longer drying times or ineffective drying.

Sensor drying

Sensor drying time may change suddenly

When using sensor drying, the dryer automatically detects the laundry's moisture and determines the necessary operating time. The time may suddenly increase or decrease during the cycle because the sensor is detecting the moisture level. This is normal and not a sign of malfunction.

Si hay vibración excesiva durante el primer ciclo de funcionamiento después de la instalación, ajuste levemente las patas niveladoras.

Vibración excesiva después de la instalación, ajuste las patas niveladoras

Después de la instalación inicial, puede experimentar vibración excesiva durante el primer ciclo de funcionamiento. Esto generalmente se puede solucionar ajustando las patas niveladoras.

Single beep tone

Single beep tone — Child Lock enabled or disabled

A single beep tone is heard when the Child Lock feature is activated or deactivated. This confirms the action taken on the control panel.

Start/Pause button active

Start/Pause button active — Dryer is running or paused

Pressing the Start/Pause button initiates the drying cycle or pauses it if it is already running. The button will indicate its active state when the dryer is operating.

Static in clothes

Static in clothes — Synthetic or blended fabrics

Certain fabrics, such as synthetics and permanent press blends, are more prone to developing static electricity.

TEMP CONTROL lights glow

Temp Control lights glow — Temperature setting selected

These lights indicate the selected temperature setting for manual cycles. Temperature modifiers cannot be used with Sensor Dry Cycles.

Uneven drying

Uneven drying or sensor not detecting moisture correctly

If the dryer is not level, the clothes may not tumble properly, and the internal sensors may not detect moisture correctly. This can lead to uneven drying.

Ventilation warning

WARNING: Improper exhaust installation can void warranty

Correct installation of the exhaust system is crucial for the dryer's performance and safety. Failure to install the exhaust system correctly will void the appliance's warranty.

WRINKLE CARE light glows

Wrinkle Care light glows — Wrinkle Care option selected

This light indicates that the Wrinkle Care option has been selected. This option helps to prevent wrinkles by periodically tumbling the laundry for up to three hours after the cycle ends.

Warning about flammable materials

Explosion Hazard warning displayed — Flammable materials present

This warning indicates that flammable materials or vapors, such as gasoline, are too close to the dryer. These items should be kept away from the appliance.

Warning about oil

Fire Hazard warning displayed — Items with oil residue present

This warning indicates that items with oil residue, such as cooking oils, are being dried or are about to be dried. Washing may not fully remove oil, and drying such items can pose a fire risk.

Water leaks from indoor unit

Water leaking from indoor unit — Condensation or blockage

Water is leaking from the indoor unit, even when humidity levels are not high. This could be due to condensation issues or a blockage in the drainage system.

Water leaks from outdoor unit

Water leaking from outdoor unit — Normal condensation during heating

Water is leaking from the outdoor unit. This is a normal occurrence due to condensed water forming on the heat exchanger during heating operations.

LG Air Conditioning Fault Codes — Complete Error List | CodeRegistry