Daikin Error Codes: What They Mean and How to Fix Them

Daikin air conditioners are designed with advanced technology to ensure optimal performance. However, like any system, they can encounter issues. When this happens, your unit will display an error code. These codes are your air conditioner’s way of identifying problems, making it easier for you to diagnose and resolve them.

What Are Daikin Error Codes?

Daikin error codes are alphanumeric signals displayed on your air conditioner’s control panel or remote. Each code corresponds to a specific issue within the system, such as:

➜ Sensor malfunctions.
➜ Power supply problems.
➜ Refrigerant issues.
➜ Component failures.

By interpreting these codes, you can quickly pinpoint the root cause of the malfunction.

Using the Daikin Error Code Search Tool

The Daikin Error Code Search Tool is a helpful resource that allows you to input the displayed code and access detailed information about the issue. With this tool, you can:

➜ Understand the exact cause of the problem.
➜ Learn how the error affects your system.
➜ Find recommended troubleshooting steps.

Daikin Error Code Lookup

Enter Error Code:

Common Daikin Air Conditioning Error Codes

A1 – Indoor PCB defect
A3 – Drain level control system error
A5 – Antifreeze/cooling mode heating error
A6 – Fan motor error
C4 – Heat exchanger temperature sensor error
C5 – Outdoor unit fan motor error
C7 – Suction air temperature sensor error
C9 – Outdoor unit air temperature sensor error
CA – Malfunction of discharge air temperature sensor
E0 – Outdoor activation of outdoor safety device
E1 – Outdoor PCB defect
E3 – High pressure control or system high pressure error
E4 – Low pressure error
E5 – Activation of compressor over heat protection
E6 – Compressor error
E7 – Front panel communication error
E8 – Overcurrent error
F3 – Discharge pipe temperature error
F6 – High floor temperature sensor error
H6 – Operation halt due to freeze protection
H8 – High pressure sensor error
H9 – Outdoor unit air sensor error
J3 – Gas leak detection
J6 – Heat exchanger overheat protection
J9 – Malfunction of thermistor (ice detection)
L1 – Inverter PCB defect
L3 – Electrical parts box temperature rise
L4 – High heat sink temperature error
L5 – Activation of compressor overcurrent protection
P0 – High pressure protection of compressor
P1 – High voltage of capacitor in main inverter circuit
P4 – Inverter radiator high temperature
U0 – Low pressure drop due to refrigerant shortage or electronic expansion valve failure
U2 – Power supply insufficient or instantaneous failure
U4 – Communication error between indoor and outdoor units
U5 – Communication error between outdoor unit and remote controller
UA – Compressor drive error

These codes can indicate various issues ranging from minor sensor faults to more serious problems requiring professional repair. If you encounter any of these error codes, it’s advisable to refer to your user manual or contact us since we are certified Daikin service providers for further assistance.

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How to Check Daikin Error Codes

To identify and resolve issues, follow these steps:

Locate the Error Code
Look for the error code on your air conditioner’s control panel or remote display. If you’re unsure where to find it, check your Daikin user manual.

Download the Daikin Error Code locator User Manual

Refer to the Error Code List
Each Daikin system has a comprehensive list of error codes specific to its model. This list can be found in your manual or downloaded here

Daikin Error Code List

Use the Search Tool
Enter the error code into the Daikin Error Code Search Tool to get detailed insights about the issue and its resolution.
Follow Recommended Fixes
Use the information provided to address the issue. For minor problems, you may be able to resolve the error yourself. For more complex issues, professional service may be required.

All the data has been Collected from the Official Daikin website here

Contact us for Air Conditioning Repair

If troubleshooting doesn’t resolve the problem, or if the error code indicates a critical issue (e.g., compressor failure or refrigerant leak), it’s best to seek professional assistance. Daikin-certified technicians have the expertise and tools needed to handle complex repairs.