Gree air conditioners are known for their reliability and efficiency, but like any complex system, they can sometimes encounter issues that trigger fault codes. Understanding these error codes and how to clear them is crucial for maintaining the optimal performance of your Gree unit. In this comprehensive guide, we’ll delve into the details of the most common Gree fault codes and provide step-by-step instructions on how to effectively clear them.
E1 High Pressure Protection
The E1 error code indicates that the high-pressure switch has been cut off for 3 seconds successively, causing the unit to stop operation. To clear this fault code, follow these steps:
- Switch off the unit by turning the power off at the circuit breaker or disconnect switch.
- Wait for at least 3 minutes to allow the system to fully discharge and reset.
- Restore power to the unit by turning the circuit breaker or disconnect switch back on.
- Observe the unit’s operation and check if the E1 error code has been cleared.
If the issue persists, you may need to check the high-pressure switch, refrigerant charge, and airflow through the condenser coil.
E2 Freeze Protection
Image source: Gree ac by Air Fans
The E2 error code is triggered when the evaporator temperature drops below the protective temperature value after the unit has been running for a period under cooling or dry mode. To clear this fault code:
- Ensure that the evaporator temperature is higher than the protective temperature value.
- Verify that the compressor has stopped for at least 3 minutes.
- Check for any obstructions or restrictions in the airflow across the evaporator coil.
- Inspect the refrigerant charge and ensure it is within the manufacturer’s specifications.
- Examine the evaporator temperature sensor for proper operation and replace it if necessary.
E3 Low Pressure Protection
The E3 error code is triggered when the low-pressure switch is cut off within 30 seconds successively while the unit is in the ON or standby state. To clear this fault code:
- Verify that the low-pressure switch is not cut off.
- Ensure that the refrigerant charge is sufficient and there are no leaks in the system.
- Check the low-pressure switch for proper operation and replace it if necessary.
- Inspect the refrigerant lines and components for any restrictions or blockages that could be causing low pressure.
E4 Compressor High Discharge Temperature Protection
The E4 error code is triggered when the compressor discharge temperature exceeds the protective temperature value. To clear this fault code:
- Switch off the unit by turning the power off at the circuit breaker or disconnect switch.
- Wait for at least 3 minutes to allow the system to fully discharge and reset.
- Restore power to the unit by turning the circuit breaker or disconnect switch back on.
- Observe the unit’s operation and check if the E4 error code has been cleared.
If the issue persists, you may need to check the compressor discharge temperature sensor, refrigerant charge, and airflow through the condenser coil.
E6 Communication Malfunction
The E6 error code is triggered when the outdoor unit does not receive data from the indoor unit. To clear this fault code:
- Verify that the communication wiring between the indoor and outdoor units is properly connected and not damaged.
- Check for any loose connections or poor contact points in the communication circuit.
- Ensure that the communication protocol and settings between the indoor and outdoor units are correct.
- If necessary, replace the communication cable or the control board in the indoor or outdoor unit.
F1 On Evaporator
The F1 error code is triggered when the temperature on the evaporator is higher than the resistance of the sensor. To clear this fault code:
- Use a multimeter to check the resistance of the evaporator temperature sensor and compare it to the manufacturer’s specifications.
- If the sensor is not functioning correctly, replace it with a new one.
- Verify that the sensor is properly installed and making good contact with the evaporator coil.
- Check for any obstructions or restrictions in the airflow across the evaporator coil.
F2 On the Condenser
The F2 error code is triggered when the temperature on the condenser is higher than the resistance of the sensor. To clear this fault code:
- Use a multimeter to check the resistance of the condenser temperature sensor and compare it to the manufacturer’s specifications.
- If the sensor is not functioning correctly, replace it with a new one.
- Verify that the sensor is properly installed and making good contact with the condenser coil.
- Check for any obstructions or restrictions in the airflow across the condenser coil.
F3 On the Outdoor Unit (Outdoor Temperature Measurement)
The F3 error code is triggered when the temperature on the outdoor unit is higher than the resistance of the sensor. To clear this fault code:
- Use a multimeter to check the resistance of the outdoor temperature sensor and compare it to the manufacturer’s specifications.
- If the sensor is not functioning correctly, replace it with a new one.
- Verify that the sensor is properly installed and making good contact with the outdoor unit.
- Ensure that the outdoor unit is not exposed to direct sunlight or other heat sources that could affect the sensor’s readings.
F4 Discharge Sensor
The F4 error code is triggered when the temperature on the discharge sensor is higher than the resistance of the sensor. To clear this fault code:
- Use a multimeter to check the resistance of the discharge temperature sensor and compare it to the manufacturer’s specifications.
- If the sensor is not functioning correctly, replace it with a new one.
- Verify that the sensor is properly installed and making good contact with the compressor discharge line.
- Check for any issues with the compressor, such as high discharge temperatures or excessive superheat.
F5 On the Compressor Discharge Tube
The F5 error code is triggered when the temperature on the compressor discharge tube is higher than the resistance of the sensor. To clear this fault code:
- Use a multimeter to check the resistance of the compressor discharge tube temperature sensor and compare it to the manufacturer’s specifications.
- If the sensor is not functioning correctly, replace it with a new one.
- Verify that the sensor is properly installed and making good contact with the compressor discharge tube.
- Inspect the compressor for any signs of overheating or excessive discharge temperatures.
To effectively clear Gree fault codes, it’s essential to have a thorough understanding of the system’s components, sensors, and operating parameters. Additionally, the use of specialized equipment, such as multimeters and refrigeration manifold gauges, is crucial for accurately diagnosing and resolving the underlying issues.
If you are not comfortable performing these troubleshooting and repair tasks, it is highly recommended to seek the assistance of a qualified HVAC technician. Attempting to clear Gree fault codes without the proper knowledge and tools can lead to further damage to the system and potentially compromise your safety.
Remember, regular maintenance and prompt attention to any error codes can help extend the lifespan of your Gree air conditioning unit and ensure its optimal performance.