Daikin Mini Split Error Code UF: How to Fix It

Easy 5-10 minutes Medium Severity Verified June 2026
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Error Code
UF
Brand
Daikin
Product Type
mini_split
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
5-10 minutes
Error code UF on a Daikin mini split means the system hasn't been set up or configured during installation. This often happens after a power reset or new installation, but it's usually easy to clear by putting the unit into its proper operating mode.
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Tools You'll Need

How to Fix Error Code UF

  1. Turn Off the System

  2. Enter Setup Mode

  3. Select the Correct Mode

  4. Save and Exit

  5. Test the System

    If you are not comfortable working with electronics, call a professional.
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When to Call a Professional

If the error code persists after trying the setup process, the indoor unit's main PCB may need to be reconfigured by a qualified HVAC technician. Attempting to change dip switches or jumpers without proper knowledge can damage the system.

Frequently Asked Questions

What does error code UF mean on a Daikin mini split?
UF stands for 'system not set yet.' It indicates the unit hasn't been configured during installation or after a factory reset.
Can I fix Daikin error code UF myself?
Yes, in most cases you can fix it by entering the setup mode on your remote control and selecting the correct operating mode. See the steps above.
Why does my Daikin show UF after a power outage?
A power outage can reset the internal settings, causing the UF error. Simply reconfigure the system using the remote control as described.
What if the remote control method doesn't clear UF?
If the remote method fails, the unit may require a technician to adjust dip switches on the indoor unit's circuit board. Contact a Daikin service professional.
Is UF error dangerous?
No, it's just a setup reminder. The unit won't operate until the setting is complete, but it's not a safety hazard.

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