Daikin
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Error Codes | 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. 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.
Daikin
daikincomfort.com › docs › default-source › skyair-system---heat-pump › malfunction-code-chart-001.pdf pdf
Service Manual - Malfunction-Code-Chart-001
Innovative HVAC solutions for residential and commercial comfort, including energy-efficient systems, financing options, and sustainability | Daikin
UH and A5 error code daikin minisplits
How many condenses do you have? Is one a multi head? Does the fault occur when all the heads from the multi head are turned on or only when one is turned off? If one is running, does the other heads coil get cold while off? No? Turn the on and the other off If possible send a pic of the piping coming out of the condenser More on reddit.com
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June 24, 2023Daikin Mini split- error code U4
There’s a specific process to it. Need a Daikin d checker tool to really further diagnose More on reddit.com
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November 25, 2023Daikin Mini split keeps shutting off. Error code U0
Lmao. U0 is the code for low refrigerant. Tell your “maintenance person” to promptly fuck right off, hire a proper licensed tech and get the leak repaired. More on reddit.com
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July 27, 2025Anyone ever gotten a EA code on a Daikin Mini Split?
It's in the game! More on reddit.com
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August 8, 2022What is a thermistor?
A thermistor is a temperature sensor. Your Daikin mini split uses it to monitor indoor coil conditions and adjust operation safely.
beaconsaves.com
beaconsaves.com › blog › daikin-mini-split-c4-error-code
Daikin Mini Split C4 Error Code: What It Means & What to Check ...
Will the system run normally with C4?
Usually not for long. The mini split may protect itself or shut down because it cannot trust the indoor coil temperature reading.
beaconsaves.com
beaconsaves.com › blog › daikin-mini-split-c4-error-code
Daikin Mini Split C4 Error Code: What It Means & What to Check ...
Does C4 mean I need a new board?
Not necessarily. The sensor or wiring is often the issue, and those should be checked first.
beaconsaves.com
beaconsaves.com › blog › daikin-mini-split-c4-error-code
Daikin Mini Split C4 Error Code: What It Means & What to Check ...
Videos
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Daikin Mini Split Error Codes - YouTube
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How to check Fault Codes Daikin Air Conditioner . Air Con Errors ...
Daikin Mini Split Error Codes
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Daikin - what to do when an error code occurs - YouTube
Daikin
daikin.com › - › media › Project › Daikin › daikin_com › products › ac › services › error_codes › pdf › sm-ts3_p1-6_errorcode-pdf.pdf pdf
Simple Self-Diagnosis by Malfunction Code After Sales Service Division (SM-TS3)
Transmission error caused by noise · k k k k · k k · U6 · Malfunction of transmission · between indoor units · Faulty wiring · External factor (Noise etc.) Defective indoor unit PCB · k k · k k · Malfunction · code · Malfunction Contents · Supposed causes ·
Home Inspection Insider
homeinspectioninsider.com › heating & cooling › daikin mini split error codes (troubleshooting guide)
Daikin Mini Split Error Codes (Troubleshooting Guide)
January 30, 2024 - Because problems are inevitable with mini-splits, Daikin has an error code and troubleshooting guide that they equip with each of their units. You’ll notice a green light flashing on the front of the unit, indicating there’s a problem.
Machine Answered
machineanswered.com › home › 20 daikin mini split error codes (quick troubleshooting)
20 Daikin Mini Split Error Codes (Quick Troubleshooting) - Machine Answered
March 26, 2026 - In particular, I’ll discuss 20 error codes, their meaning, possible causes, and troubleshooting. And if your Daikin Mini Split does not show any code despite malfunctioning, I’ll help you get the fault code if it’s present.
HVAC How To
hvachowto.com › how-to-find-the-fault-code-on-a-daikin-mini-split-system
How To Find the Fault Code on a Daikin Mini Split System – HowTo HVAC
May 16, 2023 - How To Find the Fault Code on a Daikin Mini Split System · On the remote control, find the Cancel button. Press and hold the Cancel button for 6 seconds. ... Press the Cancel button again once to cycle through the fault codes. A short beep will be heard each time the Cancel button is pressed. A Long beep will be the error code.
HVAC How To
hvachowto.com › daikin-mini-split-error-code-list
Daikin Mini Split Error Codes List – HowTo HVAC
June 17, 2023 - To use the remote control to find an error code, press the Cancel button on the remote control for 5-6 seconds until 00 is shown on the display. After the 00 flashes, the Cancel button will cycle through the codes giving short beeps for non-errors and a long beep for the problem error.
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.
Beaconsaves
beaconsaves.com › blog › daikin-mini-split-c4-error-code
Daikin Mini Split C4 Error Code: What It Means & What to Check | Beacon Services & Appliances
March 6, 2026 - A: On many Daikin mini split systems, C4 means the indoor heat exchanger thermistor is reading abnormally. In plain language, the system may not be getting a reliable temperature reading from the indoor coil sensor.
Quality Home Air Care
qualityhomeaircare.com › daikin-mini-split-troubleshooting
Daikin Mini Split Troubleshooting: Error Codes and System Solutions – Quality Home Air Care
The unit will beep and display any active error codes. Always consult your specific model’s manual for accurate code interpretation, as codes can vary between different Daikin series. Before calling a technician, several basic troubleshooting steps may resolve common Daikin mini split issues.
CoolAutomation
coolautomation.com › blog › daikin error codes: comprehensive breakdown
Daikin Error Codes (Malfunction Self-Diagnosis)
July 20, 2025 - Defect of connector contact Defect of thermistor Defect of outdoor unit PCB (Multi-split, Super-multi )
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 ·
Daikinairconditionermanual
daikinairconditionermanual.com › Daikin-Mini-Split-Manual-Troubleshooting.php
Daikin Mini Split Manual Troubleshooting
Refer to your specific model's manual for exact codes; common examples include: E0 / E1: Room temperature sensor fault (indoor). Check sensor connection and resistance. E3 / E4: Pipe temperature sensor fault (indoor heat exchanger). U0: Low refrigerant pressure / possible leak or undercharge.
Scienceonline
scienceonline.blog › daikin-mini-split-error-codes
Daikin Mini-Split Error Codes: Troubleshooting - Scienceonline.blog
Similarly, some mini-split error codes are super common and easy to resolve – like a clogged filter or a loose wire. A quick clean or a simple reset and BAM! You're back in business. Other codes, however, are a bit more cryptic and indicate deeper, more complex issues that are best left to the professionals. Imagine if there were no codes - how long would it take to fix! ... Think of your Daikin mini-split as a superhero team, each member with a special job to keep your home at the perfect temperature!
Reddit
reddit.com › r/hvacadvice › uh and a5 error code daikin minisplits
r/hvacadvice on Reddit: UH and A5 error code daikin minisplits
June 24, 2023 -
Bought a new house (~750 sq ft) with daikin minisplits, one downstairs (FTXS18LVJU) and two upstairs (CTXS07LVJU). Was having issues with them randomly shutting off and throwing UH error code and one daikin being 10x colder than others. daikin sent out a contractor (which is bs btw, do they not have dedicated techs that just inspect?) and he said the tubing was wrong and it was a $3000 fix. thought it was fishy, had a 2nd hvac guy come out and he said heat pump (4MXS36RMVJU) had low refrigerant and filled it back up. now all blow fairly cold, but if i turn off one of the daikins, then they still go into error mode UH after ~30 mins. any thoughts?
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How many condenses do you have? Is one a multi head? Does the fault occur when all the heads from the multi head are turned on or only when one is turned off? If one is running, does the other heads coil get cold while off? No? Turn the on and the other off If possible send a pic of the piping coming out of the condenser
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What you have is a Daikin Multiport. The problem is likely that the installing contractor mixed up the wiring from the outdoor to the indoor units. Daikin Multiports come with a fix from the factory for this as it’s a common issue. Turn off all indoor units from the remote controllers or thermostats. Remove cover above where the copper line sets leave the outdoor unit by way of two Phillips head screws. You will see a circuit board to the left with several LED lights (4-5 lights). Turn off power to outdoor unit by way of the breaker or the disconnect. Cycle power back on and wait for 5 minutes. Press and release the SW3 button located on the board to the left being very careful not to touch any of the wiring labeled A, B, C, etc. as these wires will have 208-230V active on them. This has initiated the wrong wiring check. If the check has been initiated you will see a flashing pattern of red lights on the board on the left. The test will then run for 10-20 minutes at which time the outdoor unit will shut off. If there were any inconsistencies in the wrong scheme from the outdoor to any or all of the indoor units, then the outdoor unit will automatically correct the wiring internally through the board logic and no physical change will be needed of the wiring scheme. What is basically happening when the wires from A, B, etc. do not correspond correctly to the Port A, Port B, etc. is that the refrigerant goes to an air handler that the blower is not currently running on or is running on low-low, so that the indoor unit begins to freeze up and an A5 error code is given. As you’ve said, the problem doesn’t happen when all indoor units are running as it doesn’t matter at that point that the refrigerant is going to wrong indoor unit as refrigerant is going to all indoor units and all indoor blowers are running. For years this has been the very first thing I do when I come upon a Daikin multiport as I’ve no idea who has been there before me, or if the installer did it correctly or not. It should be noted also that this change is stored in the PCB on the outdoor unit. So in the future if the outdoor unit circuit board is ever replaced or if the entire outdoor unit replaced, the wrong wiring check will need to be done again or else you’re back in the same boat as before.
Reddit
reddit.com › r/hvacadvice › daikin mini split- error code u4
r/hvacadvice on Reddit: Daikin Mini split- error code U4
November 25, 2023 -
I’m a little lost on trying to trouble shoot this one, any advice is appreciated. I purchased a 2 ton single head Daikin minisplit system online a few months ago to install in a workshop in my backyard, that I’m in the process of renovating. Everything was going smoothly with the install, doing the majority of the work myself. I am a builder by trade and have done several minisplit installs over the years. I hired an HVAC tech to connect the refrigerant linesets, and evacuate/ pressure test the lines. As far as I can tell the problem came about when I connected the wiring. Unfortunately I crossed the signal line and one of the power lines at the outdoor unit control wiring. When I went to fire up the system, the indoor unit status light started flashing blue, indicating a system error. I realized what had happened then and corrected the wiring. No luck, still flashing blue. Error code retrieval at this point, at the remote control reads U4: communication error. Next I tried pulling the outdoor unit control panel to see if there is a blown fuse. I was able to locate 3 separate fuses but none of them tested bad. Pulled the indoor unit control board and there is one fuse which also checked out ok. Last I try running a separate jumper wire externally to eliminate the possibility that there is an unseen break in the original signal wire. I then try turning the system on again, same thing: indoor unit status light flashing blue and error code U4. Any ideas?
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)
Malfunction code · Inspection · display · Inspection/Test button · Display of indoor unit for · which a malfunction has · been detected · Operation · LED · In case of BRC1E62 · 1. If operation stops due to malfunction, the remote · controller's operation indicator blinks.
Beaconsaves
beaconsaves.com › blog › daikin-mini-split-e5-error-code
Daikin Mini Split E5 Error Code: What It Means & What to Check | Beacon Services & Appliances
Daikin mini split E5 usually means compressor overload or motor lock protection. Learn the signs and safe first checks.
Forsavinghvac
forsavinghvac.com › home › blog › daikin mini-split error codes explained – causes, fixes & pro tips
Daikin Mini-Split Error Codes Explained – Causes, Fixes & Pro Tips - HVAC Services Toronto
June 4, 2025 - A long beep means you’ve found the current error code. Note the Code: Jot it down to share with your service provider. For Saving Home Services Inc. uses this information to deliver fast, accurate diagnosis—saving you time and reducing downtime for repairs. Here’s a quick chart of common Daikin mini-split error codes, what they mean, and what to do:
HVAC-Talk
hvac-talk.com › home › forums › ask our pros-owner assistance - no diy advice › aop residential hvac/refrigeration(beenthere zone)
Daikin Minisplit Errors | HVAC-Talk: Heating, Air & Refrigeration Discussion
June 8, 2022 - When checking error codes, do double beeps matter? It was quick, single beeps for most codes, double beeps for every code beginning with H, and then H0 gave me the long, continuous beep.