Daikin is one of the most trusted brands when it comes to air conditioning solutions. Their cassette inverter ACs are widely used in offices, shops, showrooms, and homes due to their efficient cooling and elegant design. However, like any machine, ACs may sometimes show errors. Daikin cassette inverter ACs come with a self-diagnosis system that displays error codes to help identify the problem quickly.

In this blog, we are sharing the complete Daikin Cassette AC Inverter Error Code List with their meaning, so you can understand the issue before calling a technician.

Why Do Error Codes Appear in Daikin AC?

Error codes are shown when your AC detects an abnormal operation. These codes help to:

• Pinpoint the exact fault.
• Save time during troubleshooting.
• Prevent further damage by stopping the AC.

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Daikin Cassette AC Inverter Error Code List

Here are some of the most common error codes you may see:

Indoor Unit Error Codes

• U0 – Refrigerant shortage.
• U2 – Power supply insufficient or abnormal.
• U4 – Transmission error between indoor and outdoor units.
• UA – Mismatch of indoor and outdoor unit capacity.
• A1 – PCB (indoor unit) failure.
• A3 – Drain water level abnormal (drain pump issue).
• A5 – Indoor heat exchanger freeze/overheating.
• C4 – Faulty heat exchanger temperature sensor.
• C9 – Faulty suction air temperature sensor.

Outdoor Unit Error Codes

• E1 – Outdoor PCB failure.
• E3 – High pressure abnormal.
• E4 – Low pressure abnormal.
• E5 – Overcurrent protection.
• E6 – Compressor lock or motor failure.
• E7 – Outdoor fan motor abnormal.
• E8 – Overload malfunction.
• E9 – Electronic expansion valve malfunction.
• EA – Compressor motor abnormality.
• J3 – Discharge pipe temperature sensor fault.
• J6 – Heat exchanger temperature sensor fault.

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What To Do When Error Code Appears?

1. Turn off the AC from the remote or MCB.
2. Note down the error code displayed.
3. Check basic issues like power supply, breaker, or remote settings.
4. Do not try to open the unit yourself if the error persists.
5. Call a professional Daikin service technician to resolve the problem safely.

Daikin cassette inverter ACs are advanced machines, and their error codes make troubleshooting much easier. If you face any error like U0, U2, A5, E7, or others, it is always best to consult a professional. Quick action can prevent major breakdowns and keep your AC running smoothly.

At Uniq Air Conditioner System, we provide expert Daikin Cassette AC repair and service in Noida. Our trained technicians can handle all Daikin error codes and ensure your AC works perfectly.

📞 Call us today at 7290089500 for quick service!