Hitachi is a trusted brand in the air conditioning industry, offering advanced technology and energy-efficient split AC systems. However, like most modern ACs, Hitachi models are equipped with a self-diagnostic feature that displays error codes to help users and technicians quickly identify issues.

In this blog, you’ll find a comprehensive Hitachi split AC error code list, along with a description of each code and step-by-step solutions to fix them.

❓ What Are Hitachi AC Error Codes?

Error codes are alpha-numeric messages displayed on your indoor unit or remote controller. These codes help detect faults like communication errors, temperature sensor issues, or motor failures — enabling faster diagnosis and repair.

📋 Hitachi Split AC Error Code List with Meaning & Solution

1. Error Code: E1 – Indoor Unit Room Temperature Sensor Error

• Description: Faulty or disconnected sensor prevents the unit from reading room temperature.
• Solution:
  • Inspect the temperature sensor and wiring for damage.
  • Reconnect or replace the sensor if needed.
  • Restart the AC after fixing the issue.

2. Error Code: E2 – Evaporator Coil Temperature Sensor Error

• Description: Indicates malfunction of the coil temperature sensor in the indoor unit.
• Solution:
  • Check sensor placement and wiring.
  • Clean or replace the sensor as required.

3. Error Code: E3 – Indoor Fan Motor Malfunction

• Description: The indoor fan motor is not operating properly.
• Solution:
  • Inspect for dust buildup or mechanical blockage.
  • Check motor wiring or capacitor.
  • Replace motor if necessary.

4. Error Code: E4 – Communication Error Between Indoor & Outdoor Units

• Description: The indoor unit cannot communicate with the outdoor unit.
• Solution:
  • Turn off the power supply for 5–10 minutes and restart.
  • Inspect the communication wire for cuts or damage.
  • Check both PCBs for faults and replace if needed.

5. Error Code: E5 – Outdoor Unit Discharge Sensor Error

• Description: The sensor monitoring discharge temperature is faulty.
• Solution:
  • Check sensor connectivity and placement.
  • Replace the sensor if defective.

6. Error Code: E6 – Outdoor Fan Motor Failure

• Description: The fan motor in the outdoor unit is not working.
• Solution:
  • Clean debris around the fan.
  • Inspect the motor wiring and capacitor.
  • Replace the motor if necessary.

7. Error Code: E7 – High Pressure Protection

• Description: High refrigerant pressure detected in the system.
• Solution:
  • Ensure the outdoor coil is clean and unobstructed.
  • Let the system cool and restart.
  • Have a technician check refrigerant levels and valve operation.

8. Error Code: F1 – Indoor Unit EEPROM Error

• Description: Memory chip malfunction in the indoor unit control board.
• Solution:
  • Reset the AC by turning off the power.
  • If error persists, the PCB may need to be reprogrammed or replaced.

9. Error Code: F3 – Compressor Overload or Locked Rotor

• Description: The compressor is drawing excessive current or stuck.
• Solution:
  • Allow the unit to cool and restart after 15–20 minutes.
  • Check voltage supply and airflow.
  • Technician inspection recommended for compressor health.

10. Error Code: C9 – Indoor Unit Drain Pump Malfunction

• Description: Drain pump is not working, possibly causing water leakage.
• Solution:
  • Check for clogs in the drain pipe.
  • Clean or replace the drain pump.
  • Ensure the indoor unit is leveled correctly.

✅ Tips to Avoid Frequent Errors in Hitachi AC

• Clean filters every 2 weeks for optimal airflow.
• Don’t ignore abnormal noises or reduced cooling.
• Ensure your voltage supply is stable – use a stabilizer if required.
• Schedule annual maintenance with certified professionals.
• Avoid DIY fixes for electronic or refrigerant-related issues.

🧰 When to Call a Professional?

You should contact a certified Hitachi technician if:

• The same error repeats even after resetting.
• You notice burning smells, water leakage, or poor performance.
• The AC doesn’t start or shuts down abruptly.

🔚 Conclusion

With the help of this Hitachi split AC error code list, you can now identify and possibly fix minor AC issues on your own. For anything beyond basic maintenance, it’s always best to leave the work to a professional to avoid damage or safety risks.

Need expert help? Reach out to Hitachi customer care or your local service provider to get your AC running smoothly again.

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