Daikin AC error codes help you know what’s wrong with your air conditioner. When your AC stops working or shows a blinking light, it may be trying to tell you about a problem through these codes.
In this article, you’ll learn what these Daikin air conditioner error codes mean, how to read them, and how to fix them. Whether you use a split AC or an inverter model, this guide will help you solve many common problems at home.
What Are Daikin AC Error Codes?
Daikin AC error codes are numbers and letters that show up on your AC or remote screen. These codes help tell you what is wrong with the AC.
You can check the Daikin error code list to find out what each code means. Some errors are easy to fix, like a dirty filter. Others may need a technician, like a broken part or a wiring issue.
Common Daikin AC Fault Codes and What They Mean
Here are some of the most common Daikin AC fault codes and their meanings:
Indoor Unit Error Codes
- A1 – Problem with the indoor unit’s control board
- A3 – Drain pump is not working properly
- A5 – AC is getting too cold and may freeze
- A6 – Fan inside the indoor unit is not working
- C4 – Problem with the heat sensor
- C9 – Problem with air temperature sensor
Outdoor Unit Error Codes
- E1 – Problem with the outdoor unit’s main board
- E5 – Compressor is working too hard
- E6 – Compressor is not starting
- E7 – Outdoor fan is not working
- F3 – High discharge temperature
- H0 – Protection mode turned on
System Communication Codes
- U0 – Low gas (refrigerant)
- U2 – Problem with power supply
- U4 – Indoor and outdoor units are not talking to each other
- UA – Units do not match (indoor/outdoor)
You can find all these in a full Daikin error code list, but these are the most common.
How to Fix Daikin AC Error Code
Let’s look at some common errors and how you might fix them:
A1 – Control Board Error
- Turn off the power.
- Wait a few minutes and turn it back on.
- If the error stays, you may need to replace the control board.
A3 – Drain Pump Problem
- Clean the water drain tray and pipe.
- Make sure water is flowing out.
- If not, the pump may need repair.
U0 – Low Refrigerant
- This means your AC may need more gas.
- Call a professional to check for leaks and refill it.
U4 – Indoor and Outdoor Units Not Communicating
- Check all wires and connections between units.
- If the wires are okay, you may need a technician to check the boards.
E5 – Compressor Overload
- Make sure your outdoor unit has space around it.
- Turn off the AC for 30 minutes and try again.
- If the error comes back, get a professional check-up.
If these steps don’t help, follow a Daikin AC repair guide or call an expert.
How to Reset Daikin AC Error Code Manually
Sometimes the error will stay even after the issue is fixed. In that case, you can try to reset the AC.
Reset Using Remote Control:
- Turn off your Daikin AC.
- Press and hold the “Cancel” button on the remote.
- Error codes will flash on the screen.
- When your error code appears, press “Cancel” again and hold it until you hear a beep.
Manual Reset Without Remote:
- Turn off the AC and unplug it.
- Wait for 5 minutes.
- Plug it back in and turn it on.
This can help clear Daikin split AC error codes and get your AC running again.
Daikin Inverter AC Error Codes
Inverter ACs are more advanced and save energy, but they also have special error codes.
Some common Daikin inverter AC error codes are:
- L5 – Inverter problem
- H6 – Compressor control issue
- J3 – Discharge sensor problem
If your Daikin air conditioner shows error code L5, it may need professional repair.
Daikin AC Blinking Light Problems
If your indoor unit is blinking, your AC is showing a problem code.
- 2 blinks – Sensor error
- 3 blinks – Fan motor problem
- 5 blinks – Communication error
Check your manual for Daikin AC remote error codes to match the blinks with the problem.
Why Is My Daikin AC Showing Error Code A1?
If your Daikin AC shows error code A1, the main board inside the indoor unit might not be working.
This can happen because of:
- Power surge
- Water damage
- Loose wires
- Old or damaged parts
A professional may need to replace the control board.
What Does Error Code U4 Mean on Daikin AC?
Error code U4 means the indoor and outdoor units are not connected properly.
You can try:
- Checking the communication wires
- Making sure both units have power
- Resetting the AC
If the issue stays, you may need a technician to check the boards or cables.
Common Daikin AC Problems and How to Fix Them
Here’s a quick look at some problems and what they mean:
| Problem | Error Code | Fix Suggestion |
|---|---|---|
| AC not cooling | A5, U0 | Clean filter, check refrigerant |
| AC not turning on | U2, A1 | Check power, reset AC |
| Blinking light | Varies | Count the blinks to get the code |
| No air from indoor unit | A6 | Check fan motor |
| Outdoor unit not working | E1, E6 | May need professional help |
If your Daikin AC is not working, look for an error code and follow this guide to fix it.
Daikin VRV Error Codes and What to Do
Daikin VRV systems are big systems used in large buildings. Here are some common VRV error codes:
- U4 – Communication problem
- L5 – Inverter error
- C9 – Sensor issue
- E7 – Outdoor fan error
These are harder to fix and may need an expert, but knowing the code helps you explain the problem faster.
How to Avoid Daikin AC Errors in the Future
Here are some simple tips to prevent common Daikin AC problems:
- Clean air filters every 2 to 4 weeks.
- Keep the outdoor unit clean and free of leaves or dirt.
- Check wires for damage before hot or cold seasons.
- Book yearly servicing to catch problems early.
- Pay attention to signs, like noise or blinking lights.
These steps can help you avoid many Daikin AC error codes in the future.
Conclusion
Understanding Daikin AC error codes is a great way to fix problems without wasting time or money. From Daikin air conditioner error codes to Daikin VRV error codes and solutions, this guide gives you easy steps to follow. You can consult ac maintenance and duct cleaning services for ac maintenance, ac duct cleaning, and ac cleaning in dubai.
Use the Daikin error code list in this article to check what your AC is trying to tell you. Whether your AC is showing a blinking light, not cooling, or just not working, now you have the tools to find out what’s wrong.
If the problem still doesn’t go away, it’s best to call a Daikin technician. But with this guide, you’ll know what’s happening—and that’s half the job done!
