Voltas Air Conditioner Error Codes: Complete List & Troubleshooting

Voltas air conditioners are popular for their energy efficiency and reliable cooling. However, like any other appliance, they may occasionally display error codes to signal problems with the system. These codes are designed to help you quickly identify the issue, whether it’s something simple like a dirty filter or a more serious problem requiring professional repair. Below is a list of Voltas AC error codes, their meanings, and troubleshooting solutions.

1. E1 – Indoor Temperature Sensor Error

Cause: The E1 error typically indicates a problem with the indoor temperature sensor, which can be caused by sensor malfunction or disconnection.

Solution: Turn off the unit and check the sensor for dirt or damage. If cleaning doesn’t resolve the issue, the sensor may need to be replaced.

2. E2 – Outdoor Temperature Sensor Error

Cause: The E2 error points to a malfunction with the outdoor temperature sensor, which helps regulate the system’s cooling or heating performance.

Solution: Check for any visible damage or dirt on the outdoor sensor. If cleaning doesn’t fix the problem, the sensor may need to be replaced.

3. E3 – Communication Error Between Indoor and Outdoor Units

Cause: This error occurs when the indoor and outdoor units fail to communicate properly, typically due to faulty wiring or a malfunctioning control board.

Solution: Inspect the wiring between the indoor and outdoor units to ensure there are no loose connections. If the wiring is intact, the control board may need to be repaired or replaced.

4. E4 – High Pressure Protection

Cause: The E4 error code indicates that the refrigerant pressure inside the system is too high, often caused by a blocked or dirty filter, or refrigerant overcharge.

Solution: Clean the air filters to ensure proper airflow. If the pressure is still high, contact a technician to inspect the refrigerant levels and look for blockages or system faults.

5. E5 – Low Pressure Protection

Cause: The E5 error occurs when the refrigerant pressure is too low, which can be the result of a refrigerant leak or low refrigerant levels.

Solution: Call a professional technician to check for leaks, recharge the refrigerant, and ensure the system is operating properly.

6. E6 – Outdoor Unit Communication Error

Cause: This error indicates that the outdoor unit is unable to communicate with the main control system, which could be caused by issues with wiring or the outdoor unit’s circuit board.

Solution: Ensure all the wiring between the indoor and outdoor units is intact. If everything seems fine, the circuit board may need to be replaced or repaired by a technician.

7. E7 – Overcurrent Protection

Cause: E7 occurs when the system detects an electrical overcurrent, which may be caused by a short circuit, faulty components, or unstable power supply.

Solution: Check the circuit breaker and make sure the system is receiving stable power. If the error persists, consult a technician to inspect the internal electrical components.

8. F0 – Indoor Unit Malfunction

Cause: The F0 error indicates a malfunction in the indoor unit, such as issues with the fan motor, temperature sensors, or the control board.

Solution: Turn off the unit and check the fan and other internal components for any visible damage. If you can’t identify the problem, call a technician to inspect and repair the unit.

9. F1 – Indoor Unit Circuit Board Error

Cause: This error signals a malfunction in the circuit board of the indoor unit, often caused by power surges or component failure.

Solution: If there is visible damage to the circuit board, it may need to be replaced. Contact a technician to handle this repair, as working with circuit boards can be complicated.

10. F3 – External Temperature Sensor Error

Cause: The F3 error points to an issue with the external temperature sensor, which helps regulate the system’s cooling or heating functions.

Solution: Inspect the sensor for dirt or damage. If it’s faulty, it may need to be replaced by a technician.

11. F4 – Faulty Humidity Sensor

Cause: This error is triggered when the humidity sensor is malfunctioning, which can affect the AC’s ability to dehumidify or regulate moisture levels in the air.

Solution: Clean the sensor if it’s dirty. If cleaning doesn’t fix the issue, the sensor may need to be replaced.

12. U0 – General Unit Error

Cause: The U0 error indicates a general malfunction in the system, which could be related to various internal issues, including sensors, electrical components, or communication errors.

Solution: Try resetting the unit by turning it off and unplugging it for a few minutes. If the issue persists, contact a technician to diagnose the specific problem.

13. U1 – High Voltage Protection

Cause: U1 error occurs when the air conditioner detects a high voltage level, which could damage sensitive components like the compressor or control board.

Solution: Check your home’s power supply and ensure it is stable. If high voltage continues, you may need to use a voltage stabilizer or surge protector to safeguard the unit.

14. U2 – Low Voltage Protection

Cause: This error code appears when the air conditioner detects that the voltage is too low to operate correctly, possibly due to power supply fluctuations.

Solution: Ensure the AC is receiving stable and sufficient power. A voltage stabilizer can help prevent issues caused by low voltage.

15. U3 – Internal Communication Error

Cause: The U3 error is related to an internal communication error between the control system and other components of the air conditioner.

Solution: A technician will need to inspect the internal wiring and components to identify and resolve the communication error.

Discover the complete list of Voltas Air Conditioner error codes and their meanings. Learn how to troubleshoot common AC issues, fix cooling problems, and find trusted Voltas AC repair services in Bhubaneswar and Odisha.