U5 error code might appear on Daikin wired remote, when Daikin wired remote is connected/disconnected, or our CoolPlug is connected/disconnected This error can be easily overcome by resetting pow...

These modifications do not change the intent or substance of the original messages. ... U5 error often relates to communication failures or outdoor unit shutdowns in the 24k system.

--- Error Code: U5 Checking the connection. Please stand by. Main RC --- On the Daikin website I can see some possible causes for that error: --- Malfunction of transmission between indoor unit and remote controller

April 2, 2026 - U5 – Communication error between indoor unit and remote controller – A possible mistake with the interconnection wires, or a PCB fault with the indoor/outdoor remote controller.

December 22, 2022 - U0 System Shortage of refrigerant ... units – Split only U4 System Transmission between indoor units U5 System Transmission to remote controller U6 System Malfunction transmission outdoor to BP unit U7 System Transmission between ...

Error Code Search offers information on the cause of the malfunction and the status of your air conditioner by entering the error code. Error Code Search List of Error Codes(0.1MB) Please refer to "How to Check Error Codes" for step-by-step instruction to check the error codes.

Simple Self-Diagnosis by Malfunction Code · After Sales Service Division

Power supply fault, capacitor wiring error · • · • · • · • · U3 · Check operation not executed Check operation not carried out at · commissioning or after main PCB replaced · • · U4 · Communication failure, between indoor & outdoor · Wiring fault, defect of PCB, pump wired ...

February 24, 2025 - Fault U5 is a Transmission error between indoor unit and remote controller. For more information open the Daikin Service App on your mobile. 1. Ensure you are logged into the Daikin Service App.

May 16, 2024 - Other Error Codes · Daikin - Reading thermostat temperature sensor instead of return air temperature sensor · Daikin system connection, configuration and error messages · Daikin - U5 error appears on wired remotes · CoolMaster User Manual · CoolMaster HVAC & Home Automation compatibility ·

November 10, 2025 - The remote controller can receive relevant error codes from the indoor unit. When is held down for about 5 seconds, “00” blinks in the temperature display section. The code indication changes as shown below, and notifies with a long beep. While a reset can fix minor issues, more complex problems with your Daikin air conditioner might require expert attention.

Error codes U3 (outdoor) and U4, U5, U9 (indoor) on the Daikin RXYQ120TATJU indicate communication or sensor faults. First, power off and check all wiring connections between indoor and outdoor units for looseness or damage.

July 20, 2025 - Easily identify Daikin HVAC system faults with this complete list for simple self-diagnosis & troubleshooting. Includes VRV, SkyAir, HRV systems, and more.

January 22, 2026 - The list below features all the malfunction error codes for Daikin air conditioners and their potential causes.

Complete Daikin error code list for mini-splits, VRV systems, and air conditioners. Find meanings, causes, and troubleshooting solutions for all Daikin fault codes.

The remote controller can receive relevant error codes from the indoor unit. The code indication changes as shown below, and notifies with a long beep. ... Customer Support Information: WhatsApp us your query @ 9871409300. Call Our Customer Contact Centre: 011-40319300 / 1860 180 3900 or Write To Us at customerservice@daikinindia.com X

April 14, 2026 - If your AC suddenly stops cooling and displays a strange code like U4, A5, L5, E6, don’t panic. This complete guide explains the Daikin AC error codes list, meaning, causes, step-by-step solutions, and difficulty level so you can understand:

January 22, 2026 - The list below features all the malfunction error codes for Daikin air conditioners and their potential causes.

April 21, 2026 - Is your Daikin air conditioner suddenly blowing warm air and flashing a cryptic code like U0, U4, or L5 on the display? In the middle of a hot day, a malfunctioning AC is an emergency, but that flashing code is actually your system’s highly advanced built-in diagnostic tool pointing exactly to the failure. With nearly 100 distinct error codes across its alphanumeric and numeric series, Daikin systems are incredibly precise.