In general, understanding the various LG mini split error codes is crucial for troubleshooting most issues affecting your air conditioning system. These error codes provide valuable information about when your air conditioner is experiencing problems and the severity of those issues.
Certain error codes may be resolved by simply powering off or resetting the air conditioner briefly, while others may necessitate a professional inspection. In some cases, component replacement may be required.
Being familiar with these error codes or having a reference guide is essential, and that's where this error code troubleshooting guide becomes valuable.
In this guide, we will cover the most common LG mini split fault codes, explain their meanings, discuss potential causes, and provide troubleshooting steps. This information will enable you to address the error code, potentially preventing a major malfunction or breakdown of your mini-split system.
LG Mini Split Error Codes Troubleshooting
| Error Code | Meaning | Possible Cause | Troubleshooting |
|---|---|---|---|
| CH00 | Electrical problem | Power fluctuation | Power the unit off for 5 minutes |
| CH01/CH02 | Auto-Stop Protection problem | Open/shut circuit fault | Request expert inspection |
| CH03/E3 | No refrigerant | Refrigerant leakage | Request expert inspection |
| CH05/5 flashes | Communication fault | Lack of power or wiring fault | Check the power supply and fix any wiring faults or loose connection |
| CH07 | Operation mode variation | The indoor and outdoor units operate in different modes | Change the operating mode; reset the unit if that doesn't work |
| CH10 | Locked up motor | Failed indoor fan motor | Replace the fan motor |
| CH21 | High voltage compressor, or PCB fault | Short-circuited compressor, bad inverter PCB | Replace the compressor or PCB |
| Code 26 | Seized compressor | The compressor is not correctly connected | Check the compressor and secure it properly |
| CH34 | Overheating | Abnormal pressure in the unit's sealed system or dirty condenser coils | Shelter the AC from direct sunlight and clean dirty condenser coils |
| CH35 | Low-pressure sensor fault | Blocked outdoor fan, refrigerator leak, poorly connected pressure sensor, or a bad compressor sensor or PCB | Clean any fan blockage and request expert inspection for the other issues |
| CH38 | Electrical fault or low refrigerant | Unstable power or refrigerant leakage | Reset the mini split and request an expert repair if it won't reset |
| CH67 | Outdoor fan lock fault | Seized outdoor fan motor or defective rotation sensor circuit | Inspect the outdoor fan motor for fault and replace it if you can't fix it |
| P2/FL | Full drain pan | High humidity | Turn the fan to low speed and AC to cool mode |
| Code E4 | Defrost Mode | Ice detected in the evaporator | Wait for the AC to complete the defrost (up to 10 minutes) |
| Code E5 | Full water collection | Poor drainage | Drain out the water collection tank |
| Code F1/F2/F3 | Fan Mode | The normal working of the fan | Nothing to fix |
How to Troubleshoot Common LG Mini Split Error Codes
1. Error Code CH00
Meaning
Indicating an electrical problem, the CH00 error code commonly appears on the mini split's display, particularly when there's a power fluctuation. Therefore, it's necessary to examine your unit to pinpoint the source of the problem.
Cause
Code CH00 is usually displayed on the mini-split to signal an electrical issue, particularly one related to power fluctuations. Consequently, you should inspect your unit to identify the root of the problem.
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Troubleshooting
To address this issue, unplug the mini split for approximately 5 minutes and then reconnect it. If the error code persists, it's advisable to seek the assistance of a professional inspector.
2. Error Code CH01/CH02/E1/E2
Meaning
The occurrence of error codes CH01, CH02, E1, or E2 typically signifies a concern related to the mini split's auto-stop protection mechanism. This is often associated with an issue such as an open or short circuit problem that affects the pipe sensor.
Cause
The presence of error codes CH01, CH02, E1, or E2 commonly signals an issue with the mini split's auto-stop protection, frequently arising from a problem with the pipe sensor, such as an open or short circuit.
Troubleshooting
To resolve this matter, it is recommended to seek the assistance of a professional inspector to evaluate and address the pipe sensor issue.
Pros and Cons of LG Mini Split
Pros
- Energy Efficiency
- Zoning
- Quiet Operation
- Installation Flexibility
Cons
- Upfront Cost
- Complex Installation
- Aesthetic Impact
- Maintenance
Differences Between LG Mini Split and Mitsubishi Electric
Mitsubishi Electric mini-split
Mitsubishi Electric mini-split systems are known for their quiet operation. They often incorporate features like "i-see" sensors that can adjust airflow based on room occupancy and temperature, helping to maintain a more consistent and quieter environment.
LG mini-split
LG mini-split systems are typically designed to operate quietly as well, but the noise levels may vary depending on the specific model and installation.
Alternative to LG Mini Split
Gree
Gree is a Chinese manufacturer that has gained recognition for its ductless mini-split systems. They offer a wide selection of models at various price points.
3. LG Mini Split Error Codes: CH 03 or E3
Meaning
The appearance of error codes CH03 or E3 on the mini split display signifies a situation where the refrigerant level has decreased significantly. This points to a substantial refrigerant leak, and one clear indication of this issue is the failure of the LG air conditioner to provide cooling.
Cause
Error codes CH03 or E3 are triggered when the mini-split system detects a substantial drop in the refrigerant level, which is indicative of a significant refrigerant leak. This leakage is often accompanied by the LG air conditioner's inability to provide cooling.
Troubleshooting
In order to address this issue, it is imperative to have your unit's refrigerant refilled. However, this is a task that should be entrusted to a professional technician with expertise in handling refrigerant-related matters.
4. LG Mini Split Error Codes CH 05 (LG Mini Split Error Codes 5 Flashes)
Meaning
The appearance of error code CH05 (sometimes represented as five light flashes) indicates the presence of communication faults, either in the outdoor or indoor unit of your mini split system.
Cause
Error code CH05 is typically triggered when there is a breakdown in communication between the outdoor and indoor units. This issue can be caused by several factors, including:
- Failed power supply: where the unit doesn't receive power due to issues like a faulty socket, tripped breaker, or a blown fuse.
- Wiring faults, such as broken or loose wiring connections.
Troubleshooting
To address this problem, take the following steps:
- Ensure that your unit is receiving power. If the circuit breaker is tripped, reset it.
- Check the thermal fuse and power plug for electrical continuity using a multimeter. If either of them fails the test, replace them as necessary.
5. Error Code CH07
Meaning
The CH07 error code occurs when there is a disparity in the operation mode or temperature settings between the master unit and the indoor unit of the mini-split system.
Cause
This error is typically triggered when there is a difference in temperature or operation mode settings between the master unit and the indoor unit. The units are not synchronized in terms of their settings.
Troubleshooting
To resolve this issue, follow these steps:
- Adjust the temperature settings on both the master and indoor units to match each other.
- If the error code persists, unplug the mini-split system for a few minutes to reset it. This may help clear the error code.
6. LG Mini Split Error Codes CH 10
Meaning
The error code CH10 indicates a "locked up motor" situation, which occurs when the fan motor in the indoor unit fails to operate. This is typically accompanied by a single blink of the indoor LED.
Cause
The CH10 error code is triggered when the fan motor ceases to function, causing the indoor fan to become locked up. This lack of fan motor operation results in the error code, along with a single blink of the indoor LED.
Troubleshooting
To address this issue, you should replace the faulty fan motor with a new one.
Conclusion
Understanding LG mini split error codes and their meanings is essential for effectively troubleshooting and maintaining your air conditioning system. Each error code provides valuable information about the specific issue affecting your mini-split, allowing you to take appropriate action.
Whether it's addressing electrical problems, refrigerant issues, communication faults, temperature variations, or locked-up fan motors, knowing the cause and following the recommended troubleshooting steps can help you resolve the problem and prevent more significant malfunctions.
If the troubleshooting steps don't work, it's advisable to seek professional inspection and repair. Regular maintenance and quick response to error codes can contribute to the longevity and efficiency of your LG mini split system.
