Comprehensive Compilation of Daikin Air Conditioner F, P, U Error Codes for 2023

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Daikin Air Conditioner Error Code U

1. Error Code U0

2. Error Code U1

3. Error Code U2

4. Error Code U3

5. Error Code U4

6. Error Code U5

7. Error Code U7

8. Error Code U8

9. Error Code U9

10. Error Code UA

11. Error Code UE

12. Error Code UF

13. Error Code UH

Error Code P Daikin Air Conditioner

1. Error Code P4

2. Error Code PJ

Error Code F for Daikin Air Conditioners

1. Error Code F3

Using a Daikin air conditioner and suddenly encountering F, P, U error codes with numbers? Unsure about the error your air conditioner is facing and how to fix it? Quickly read through the most comprehensive list of F, P, U error codes for Daikin air conditioners in 2023 below to understand the causes and solutions.

Daikin Air Conditioner Error Code U

1. Error Code U0

+ Error Name: Low Refrigerant Warning.

+ Causes and Solutions: Low refrigerant or gas leakage (pipeline construction error); temperature sensor malfunction (R4T, R7T); low pressure sensor malfunction; outdoor unit circuit board malfunction.

2. Error Code U1

+ Error Name: Phase Reversal, Phase Loss.

+ Causes and Solutions: Power supply phase reversal; power supply phase loss; outdoor unit circuit board malfunction.

3. Error Code U2

+ Error Name: Insufficient Power Supply or Rapid Voltage Drop.

+ Causes and Solutions: Insufficient power supply; instantaneous power supply failure; phase loss; Inverter board malfunction; outdoor unit control board malfunction; main circuit wire failure; compressor malfunction; fan motor malfunction; signal transmission wire failure.

4. Error Code U3

+ Error Name: Operation Check Failure.

+ Causes and Solutions: Perform system check again.

5. Error Code U4

+ Error Name: Signal Transmission Failure Between Indoor and Outdoor Units.

+ Causes and Solutions: Wiring between indoor-outdoor units, outdoor-outdoor units cut, short circuit, or incorrectly connected (F1, F2); outdoor or indoor unit power loss; incompatible address system; indoor unit circuit board malfunction; outdoor unit circuit board malfunction.

6. Error Code U5

+ Error Name: Signal Transmission Failure Between Indoor Unit and Remote Control.

+ Causes and Solutions: Check signal transmission between indoor unit and remote control; recheck settings if one indoor unit uses two remotes; remote control board malfunction; indoor unit circuit board malfunction; possible interference.

7. Error Code U7

+ Error Name: Signal Transmission Failure Between Outdoor Units.

+ Causes and Solutions: Check connection between outdoor unit and C/H control adapter; inspect signal wires between outdoor units; check outdoor unit circuit board; C/H control adapter malfunction; incompatible C/H control adapter; incorrect address (outdoor unit and C/H control adapter).

8. Error Code U8

+ Error Name: Signal Transmission Failure Between Main and Sub Remotes.

+ Causes and Solutions: Check signal transmission wire between main and sub remotes; remote control board malfunction; auxiliary control connection failure.

9. Error Code U9

+ Error Name: Signal Transmission Failure Between Indoor and Outdoor Units in the Same System.

+ Causes and Solutions: Check internal and external signal transmission wires in the system; inspect electronic expansion valve on the indoor unit of the system; system indoor unit circuit board malfunction; connection failure between outdoor and indoor units.

10. Error Code UA

+ Error Name: Exceeding the Number of Indoor Units.

+ Causes and Solutions: Check the number of indoor units; outdoor unit circuit board malfunction; incompatibility between outdoor and indoor units; failure to reset the outdoor unit when replacing; duplicate addresses on central remote; verify system addresses and reset if necessary.

11. Error Code UE

+ Error Name: Signal Transmission Failure Between Central Control Remote and Indoor Unit.

+ Causes and Solutions: Check signal between indoor unit and central control remote; master control signal transmission failure; central control board malfunction; indoor unit circuit board malfunction.

12. Error Code UF

+ Error Name: Improper Installation of Cooling System, Incompatible Control Wiring / Gas Line.

+ Causes and Solutions: Check signal between indoor and outdoor units; malfunctioning indoor unit board; unclosed shut-off valve; failure to perform system check.

13. Error Code UH

+ Error Name: System Malfunction, Gas System Address Undefined.

+ Causes and Solutions: Check signal between outdoor unit-indoor unit, outdoor unit-outdoor unit; malfunctioning indoor unit board; malfunctioning outdoor unit board.

Error Code P Daikin Air Conditioner

1. Error Code P4

+ Error Name: Inverter Heat Sink Temperature Sensor Malfunction.

+ Causes and Solutions: Malfunction of heat sink temperature sensor; Inverter circuit board malfunction.

2. Error Code PJ

+ Error Name: Outdoor Unit Power Setting Error.

+ Causes and Solutions: Failure to set outdoor unit power; Incorrect outdoor unit power setting when replacing the outdoor unit board.

Error Code F for Daikin Air Conditioners

1. Error Code F3

+ Error Name: Abnormal Discharge Pipe Temperature

+ Causes and Solutions: Connection error of the discharge pipe temperature sensor; Discharge pipe temperature sensor malfunction or misplacement; Outdoor unit board malfunction.

To check what exact error your Daikin air conditioner is facing, press and hold the Cancel button on the remote for 5 seconds or until the display shows code 00. Continue pressing Cancel one click at a time (do not hold) to cycle through the error codes. When the error code appears along with a beep, that is the Daikin air conditioner error code.

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Frequently Asked Questions

What should I do when my Daikin air conditioner shows an F, P, or U error code?

When your Daikin air conditioner displays an F, P, or U error code, it's essential to identify the specific error code first. Each code indicates a different issue, such as low refrigerant or signal transmission failures. Once identified, follow the corresponding troubleshooting steps outlined in the error code list to address the problem effectively.

How can I fix the U1 error code on my Daikin air conditioner?

To resolve the U1 error code, first check the power supply for phase reversal or loss. Ensure that the outdoor unit circuit board is functioning correctly. If issues persist, it may be necessary to contact a professional technician to examine the electrical connections and the unit's overall performance.

Is it safe to continue using my air conditioner with an error code displayed?

No, it is not safe to continue using your air conditioner with an error code displayed. Operating an air conditioner with unresolved issues can lead to further damage or safety hazards. It's crucial to diagnose and address the specific error code to ensure the system operates efficiently and safely.

What does the U3 error code indicate in my Daikin air conditioner?

The U3 error code indicates an operation check failure in your Daikin air conditioner. This usually means that the system requires a recheck to confirm its operational status. It is advisable to consult the user manual or contact a technician for assistance in diagnosing and resolving the issue.

How do I clear the error codes on my Daikin air conditioner?

To clear the error codes on your Daikin air conditioner, press and hold the Cancel button on the remote for 5 seconds. Continue pressing Cancel one click at a time until you see the error code displayed again. Follow the troubleshooting steps for that specific code to resolve the underlying issue.

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