In this post, we will explore the common LG Inverter refrigerator LED blinking error codes, explain their meanings, and provide effective solutions to fix them. Understanding the error codes displayed by the LED lights on your LG Inverter refrigerator is the first step towards troubleshooting and resolving any problems.
So, let’s dive in and uncover the mysteries behind these error codes, empowering you to tackle any issues that may arise with your refrigerator.
LG Inverter Refrigerator LED Blinking Error Codes Explained!
When it comes to LG inverter compressors, there are two distinct types of controllers that are employed in their operation. Let’s take a closer look at each one:
Smart Inverter Compressor:
- The smart inverter compressor utilizes the “V” inverter system, which stands for variable voltage and frequency. This system operates on a three-phase control algorithm, allowing it to adjust its performance based on various conditions. The Smart Inverter compressor is designed to optimize energy consumption and provide efficient cooling for your refrigerator.
Inverter linear compressor:
Within the realm of inverter linear compressors, we encounter two different systems:
- The “E”-inverter system operates on constant voltage and frequency. This means that the compressor functions at a fixed speed and operates in a single phase. It follows a simple on/off mechanism to maintain a consistent cooling output.
- The “A”-inverter system, on the other hand, employs variable voltage and frequency. Similar to the smart inverter compressor, it also operates on a single phase but utilizes a control algorithm that adjusts the compressor’s performance according to various conditions. This system ensures efficient cooling while maintaining flexibility in adapting to changing cooling requirements.
Understanding LG Inverter Refrigerator LED Blinking Error Codes
To identify the LED blinking error code on an LG Inverter refrigerator, a simple calculation of the number of flashes on the warning LED of the inverter board is required. The exact location of this LED can be determined by referring to the provided image, which shows its precise placement on the main board. The number of flashes serves as a crucial indicator, aiding in the identification of the specific malfunction within the refrigerator.
The linear and/or smart inverter compressor systems of LG refrigerators incorporate seven protection logics meticulously designed to safeguard their operation. In the event of a detected failure, the compressor will shut down and attempt to restart after a predetermined period, which varies depending on the type of failure encountered. During this process, the LED will emit flashes in accordance with the corresponding error code.
It’s important to note that the LED will continue to flash until the unit is disconnected from the power source, ensuring the error code remains visible for diagnosis and troubleshooting purposes.
| Inverter type | Number of LED blinks | Remark |
|---|---|---|
| V-Inverter E-Inverter A-Inverter | One time | The compressor current and voltage error |
| V-Inverter E-Inverter A-Inverter | Two times | A piston stroke overrun was detected. |
| V-Inverter E-Inverter A-Inverter | Three times | The compressor has an open-circuit error. |
| V-Inverter E-Inverter A-Inverter | five times | The piston is locked. |
| V-Inverter E-Inverter A-Inverter | Six Times | current overload detected. |
| V-Inverter E-Inverter A-Inverter | Seven times | high current detected due to IPM failure. |
| V-Inverter E-Inverter A-Inverter | Eight times | miscommunication with the refrigerator. |
LG Inverter Refrigerator LED Blinking Error Codes Troubleshooting
WARNING: Electricity is extremely hazardous. Prioritize safety! Your compressor has a 10-year warranty, but if you try to fix it yourself, you might lose the warranty. Contact LG Customer Service for assistance.
LED blinks one time: compressor current and voltage error.
Solutions:
When the compressor of an LG Inverter refrigerator is turned off and the LED starts flashing once, it’s crucial to follow a systematic troubleshooting process.
- Here are the points to check: Measure the voltage between GND and pins 1, 2, and 3. The expected range should be between 2.2 and 2.8 volts for each pin.
- If any of the voltage readings fall outside the specified range, it indicates a potential issue. In such cases, consider replacing the main board to rectify the problem.
- After resetting the power, the compressor of the refrigerator should run for a minimum of 8 minutes.
- For a linear compressor, check for a minimum of 80 Vac between the COMM pin and POWER pin on the inverter/main board.
- For the BLDC inverter compressor, check for a minimum of 160 Vac between the MU pin, MV pin, and MW pin on the Inverter/Main board.
- If you don’t want to wait for 8 minutes, you can press the test button once. This action will cause the voltage output of the compressor to gradually increase from 180 to approximately 200 volts within 2 minutes.
- If the error code persists despite performing the necessary checks and resets, it may be necessary to replace the Inverter/Main board to resolve the issue.
LED blinks two times: Piston stroke overrun detected error
Solutions:
If your LG Inverter refrigerator’s compressor works intermittently and the LED blinks twice, it’s essential to undertake specific checks to identify and address the underlying issue.
- Here are the steps to follow: Begin by disconnecting the refrigerator from the power source.
- Check the harness connected to the compressor for any loose connections, damage, or signs of wear. Ensure it is securely connected without any visible faults.
- Ensure that the condenser fan, responsible for cooling the refrigerator’s condenser coils, is running smoothly.
- Check if the freezer compartment is functioning properly and maintaining the desired temperature.
- Inspect the sealed system for potential issues, such as refrigerant leaks or restrictions. These problems can impede the compressor’s operation and lead to intermittent functioning.
- Look for any signs of oil stains or refrigerant leaks around the compressor or other components of the sealed system.
- If the error code still occurs despite performing the necessary troubleshooting, it may be necessary to replace the Inverter/Main board to resolve the problem.
- If the error code persists, replace the compressor.
LED blinks three times: compressor open circuit error.
Solutions:
When the compressor of an LG Inverter refrigerator is turned off and the LED starts flashing three times, it’s crucial to follow a systematic troubleshooting process.
- Unplug the refrigerator and inspect the compressor harness and capacitor.
- Begin by disconnecting the refrigerator from the power source for safety.
- Check the harness connected to the compressor for any loose connections, damage, or signs of wear. Ensure it is securely connected without any visible faults.
- Check the overload protection.
- Proceed to inspect the capacitor, which can affect the compressor’s operation. You can test the capacitor with the harness disconnected. Look for one of three capacitors: 10μF, 18μF, or 20μF.
- Test compressor resistance:
- To check the inverter linear compressor, measure the resistance between the Po pin and Co pin. The expected resistance range should be between 6 and 9 Ω.
- For the BLDC inverter compressor:
- To check the smart inverter compressor, measure the resistance between the U pin, V pin, and W pin. The expected resistance range should be between ~ 12 and 15 Ω.
LED blinks five times: Piston is locked error.
Solutions:
If the LED on your LG Inverter refrigerator flashes five times while the compressor is off and resetting the refrigerator does not resolve the issue, it indicates that the piston is locked. In this case, the repeated five flashes suggest possible damage to the cylinder or cylinder piston or a restricted discharge within the compressor. Common issues are often caused by the presence of foreign material inside the compressor. In such cases, it is likely that the compressor has malfunctioned and needs to be replaced.
LED blinks six times: current overload detected error
Solutions:
If the LED on your LG Inverter refrigerator flashes six times while the compressor is off, it indicates that the current overload has been detected. In such cases, several potential issues can be responsible for the error. Consider the following possibilities and troubleshooting steps:
- Check if the room temperature is excessively high, beyond the acceptable range specified for the refrigerator.
- Clear any obstructions that may hinder proper airflow.
- Verify if the condenser fan is operational. If it has stopped working, it can lead to improper cooling.
- Inspect the condenser fan and its blade for any damage or obstruction. Clean the fan and remove any accumulated dirt or debris that may impede its function.
- Clean the condenser coils to remove accumulated dirt and dust. A dirty condenser can reduce cooling efficiency.
- Inspect the wire harness connecting the compressor for any loose connections, damage, or wear.
- Check the compressor winding coils for any signs of damage or failure.
- If the error code continues to persist despite checking the wire harness, condenser fan, and compressor winding coils, additional actions may be necessary:
- Replace the main board. If the error persists after ensuring the proper functioning of the above components, it may indicate a malfunctioning main board.
- Replace the compressor: If the error still occurs even after replacing the main board, it is likely that the compressor itself needs to be replaced to resolve the issue.
- Check for any restrictions or blockages in the discharge line. Clear any obstructions to ensure proper refrigerant flow.
LED blinks seven times: high current detected due to IPM error
Solutions:
Unplug the refrigerator, and:
- Check the wiring harness between the inverter/main board and the compressor.
- If the error still occurs after checking the wiring, check the inverter or main board.
- If the error persists after checking the inverter or main board, replace the compressor.
LED blinks eight times: Miscommunication with Refrigerator
Solutions:
- Replace the inverter or main board.
- If the error persists, consider replacing the compressor.
Efficient Method for Checking LG Inverter Linear Compressor Using Test Jig:
In this guide, we will explain the step-by-step method for quickly checking the LG inverter linear compressor using a test jig to identify any defective compressors. Follow these instructions carefully to ensure accurate results.
- Determine the compressor connector type:
- Before proceeding with the testing, it is crucial to check the compressor type. This information is essential for a proper connection to the test jig.
- Remove the terminal cover and connect the test jig.
- Once you have identified the type of compressor connector, carefully remove the terminal cover of the compressor.
- Next, connect the appropriate test jig terminal to the compressor, ensuring a secure connection.
- Perform the test within 1 minute.
- Timing is crucial in this procedure, as it helps prevent potential damage to the compressor. The test must be conducted within 1 minute of connecting the test jig to the compressor.
- Check for proper operation:
- If the compressor type is correctly identified, it will start running once the test jig is connected. Observe the operation by checking for vibrations or any operating noise. You can do this by placing your hands on the compressor. Lack of vibration or operating noise indicates a non-functional compressor.
- Discharging Voltage from Capacitor:
- After successfully completing the compressor direct run using the test jig, you must discharge any remaining voltage from the capacitor. To do this, carefully short-circuit both ends of the capacitor using a suitable screwdriver.
Keep in mind that each compressor model may require a specific capacitor. Refer to the service manual for the exact capacitor specifications. Using the correct capacitor is crucial to avoid damaging the compressor during testing.
Discover the Test Jig Schematic for Efficient LG Inverter Linear Compressor Testing:
Below, you can find an illustration showing the schematic diagram of a test jig specially designed for LG’s inverter linear compressor during the testing process.
Conclusion:
LG inverter refrigerator LED blinking error codes provide valuable insights into potential malfunctions. By following the recommended troubleshooting steps, you can effectively diagnose and resolve issues with the compressor, harness, capacitor, and other components.
Please make a way to have external filter for the condenser so that it will continue the best performance of the your product
what if its blinking 4 times