JustAnswer
justanswer.com › australia-whitegoods › 80fux-code-u1-showing-flashing-dikin-air-con-controller.html
How to Fix Daikin Error Code U1: Expert Solutions
First, power off the system and check wiring connections for loose or damaged cables. Inspect the indoor unit’s PCB and sensors for faults or corrosion. Reset the controller by turning off power for 5 minutes, then restart.
Reddit
reddit.com › r/hvac › help - daikin 20kw ducted system is throwing a u1 fault code
r/HVAC on Reddit: HELP - DAIKIN 20kw ducted system is throwing a U1 fault code
October 31, 2025 -
DAIKIN 20kw ducted system is throwing a U1 fault code.
We did change the power and incorrectly orientated the phases but have rectified this issue but we can’t clear the code to restart the unit.
I have continuity checked all the fuses on the PCB’s and carried out numerous power off resets including one over night but the fault code persist.
I think the indoor controller is just telling the out door unit it has a problem at this point.
Have cleared the fault off the remote but the out door unit still won’t start.
PCB’s don’t have any visible issues.
Any ideas on what to try next?? We really need this thing going as it’s being used for temperature control in a factory.
Videos
Daikin
daikin.com › products › ac › services › error_codes
Error Codes | After Sales Service | Air Conditioning and Refrigeration | Daikin Global
By checking the error code, you are able to identify the status and the issue of the air conditioner/air conditioning system.
Daikin
my.daikin.eu › content › dam › DASW › supportavdelningen › Felkoder_SM-TS3errorcode_chart.pdf pdf
Simple Self-Diagnosis by Malfunction Code After Sales Service Division (SM-TS3)
U1 · Reverse phase, open phase · Power supply reverse phase · T phase open phase · Defective outdoor unit PCB (A1P) k k k k k k k · U2 · Malfunction of power supply or · instantaneous power failure · Abnormal power supply voltage · Instantaneous power failure · Defective main circuit ...
JustAnswer
justanswer.com › hvac › roaz1-u1-error-code-daikin-controller-not-know.html
Daikin U1 Error Code: Troubleshooting Guide & Solutions
The U1 error on a Daikin AC typically ... the indoor unit’s PCB and sensors for faults. Reset the system by turning off power for several minutes....
Airway Group
airway-group.co.uk › home › help & advice › daikin air conditioning fault codes explained [infographic]
Daikin Air Conditioning Fault Codes Explained [Infographic] | Airway
April 2, 2026 - U1 – Reverse phase – The three phase power supply has been reversed. U2 – Open phase or power voltage imbalance – There may be an open phase or a voltage imbalance in the power supply.
Daikin ONE
daikinone.com › smart_thermostats › oneplus › pros › PhaseTwoErrorCodes.pdf pdf
Climate Talk Fault Code Dealer error code Possible causes Corrective actions
01 · Not used yet · Thermostat · 02 · Thermostat internal communication error · ClimateTalk coprocessor was not anle to start. •Conduct a warm start of the thermostat. •Call Daikin support at 1-855-DAIKIN1(option 1) •Replace thermostat if needed ·
Daikin
daikin.com › - › media › Project › Daikin › daikin_com › products › ac › services › error_codes › pdf › sm-ts3_p7-8_howtocheck-pdf.pdf pdf
UNIT NO. 1 CODE UNIT NO. 1 3. Press MODE selector button. 4. Change the
UNIT NO. 1 · 3. Press MODE · selector button · 4. Change the · upper digit · 1. Press · INSPECTION/TEST · button · 6. Change the
Star-supply
star-supply.com › content › Daikin-Troubleshooting Codes.pdf pdf
Trouble Shooting www.climatecenter.co.uk Daikin Trouble Shooting Guide
Capacity setting error · Incorrect capacity setting · • · • · Trouble Shooting · www.climatecenter.co.uk · Daikin Trouble Shooting Guide · Past & Current Models · Daikin Fault Codes · System Fault Codes · Fault Code · Definition · Supposed Causes · Split · Skyair · VRV · Package · HRV · U0 · Shortage of refrigerant · Undercharged, EEV fault, faulty sensor · • · • · • · • · U1 ...
Quality Home Air Care
qualityhomeaircare.com › daikin-thermostat-error-code-u4-01-troubleshooting
Daikin Thermostat Error Code U4-01 Troubleshooting Guide – Quality Home Air Care
Reset To Factory Settings (If Advised): Some Daikin models support a factory reset. Document current settings before resetting, then reconfigure the unit from scratch to see if U4-01 is cleared.
Whirlpool
forums.whirlpool.net.au › home › air con › daikin error code: u1-04
Daikin error code: U1-04 - Air conditioners
Our Daikin has been very unhappy at times when power is dropped by blackout when it was running, What makes it worse is it will reset (Power) for 20 sec or so then dropout again.
JustAnswer
justanswer.com › australia-whitegoods › 58gw0-error-code-u1-solution-daikin-model-brc1e61-indoor-unit.html
How to Fix Daikin Error Code U1: Expert Solutions and Troubleshooting
After a power outage, check wiring connections for looseness or damage. Reset the system by turning off power for 5 minutes, then restart. Inspect the PCB boards for faults or corrosion.
CoolAutomation
coolautomation.com › blog › daikin error codes: comprehensive breakdown
Daikin Error Codes (Malfunction Self-Diagnosis)
July 20, 2025 - Other centralized control power disconnection Centralized control reset switch ON Defect of transmission wiring Central remote controller address change
Daikin-airconservice
daikin-airconservice.ru › f › si30-701.pdf pdf
Pocket Manual Service Diagnosis Si30 - 701_A
code · Troubleshooting · Description of error · Description of diagnosis · Troubleshooting by Remote Controller · 45 · U1 - 01 · Reverse phase/open phase · for power supply (Master) Refer to the “U1” flow chart of · each manual and make a · diagnosis of the relevant unit ·
Penair
penair.com.au › home › how to reset a daikin air conditioner
Daikin Troubleshooting: Error Codes & Resetting A Daikin
November 10, 2025 - Master Daikin troubleshooting with our updated 2024 guide. Reset your air conditioner and solve common issues easily.
JustAnswer
justanswer.com › hvac › kv8uf-daikin-support-air-con-heater-error-code-u4-01.html
Daikin U4-01 Error Code? Troubleshooting Help & Fix Guide
December 22, 2022 - First, power off the unit and check sensor wiring connections for looseness or damage. Clean the air filters and ensure no obstructions block airflow. Reset the system by holding the ON button for 10 seconds.
Scribd
scribd.com › document › 425197901 › Daikin-error-code-pdf
Daikin VRV Error Code Troubleshooting Guide | PDF | Manufactured Goods | Electrical Engineering
U1 − 01 Reverse phase/open phase for power supply (Master) U1 − 04 Reverse phase for power supply [with power supply turned ON] (Master) U1 − 05 Reverse phase/open phase for power supply (Slave 1) Refer to the “U1” flow chart of each ...
Daikin
daikin.com › products › ac › services › errorcode_search
Error Codes Search | After Sales Service | Air Conditioning and Refrigeration | Daikin Global
Error Code Search offers information on the cause of the malfunction and the status of your air conditioner by entering the error code.
RemoveandReplace.com
removeandreplace.com › home › home air conditioning › daikin air conditioner ac error codes
DAIKIN Air Conditioner AC Error Codes
December 22, 2022 - Is your Daikin AC showing an error code? Error codes can show on either the inside unit or the outside unit. Since these are split systems, we have broken down the error codes for each unit – outside and inside. These error codes will tell you what the issue is with your Daikin AC.