How to fault find a Daikin Air Conditioner, troubleshoot split system, green flashing light.MOV

[@alangreen4867]

Can't believe I just diagnosed and fixed my air conditioner fault using your video! In years gone by I would have suffered in the heat, waited for hours for a technician then paid the invoice. Thankyou!

[@jadluciano4400]

A trick: you can watch movies at Flixzone. I've been using them for watching loads of movies these days.

[@bowenalfonso3208]

@Jad Luciano Definitely, have been using flixzone} for since november myself =)

[@CKLee-rs4kl]

Thank you so much! You just saved me $400.00 for the installer's electrician to come out and scratch his head and look at me like I'm simple minded. I put some potted boxwoods a foot in front of the fan and I'll try moving them to see if that solves the issue. I printed the codes -- which I couldn't find anywhere in the Daikin info I got after the install OR online. You're the best!

[@FullyAirconditioned]

@@CKLee-rs4kl thanks

[@hspoupas]

Already the second time I had to resort to this video to understand how to check the fault and how to reset the AC. Thank you very much! I hope this video stays up forever!

[@2rodcampedison648]

I’m from California, just started in the trade about 2 years ago. Running into a lot of these mini split. Didn’t even know these things existed 12 years ago. Great video explaining how to find the fault code.

[@ianfromnsw1]

Just had my Daikin A/C stop working today, between Christmas and New Year and 35 degrees outside. This video helped me find the error code, U4, [Malfunction of transmission between indoor and outdoor unit] Looking like some circuit board problem, I decided to do the basics, at the outside unit, I turned the isolator off for about a minute and then back on. To my delight, it is now running again. Thank you Fully A/C.

[@ianfromnsw1]

Just a quick note, I have only been living, renting this new home for less than a year and this is the second time our A/C has stopped. The first time the landlord got someone to fix it. Before this home we owned and lived in our home for 19 years, we installed a Fujitsu A/C to this home. The Fujitsu never stopped once. I will never buy a Daikin if I had the choice.

[@ozcobbler1]

You are a lifesaver, had the error U4, turned off the invertor switch for 10 seconds and fixed, thank you so much

[@1979DrNick]

Oh man, you're my hero. Had a flashing light on my Daikin, and its going to be about a million degrees today. The instruction manual was useless - this video saved me! Thanks Fully Airconditioned!! (error was U4 - easily solved by flipping off at the main switchboard for 10 secs then back on).

[@LisaNash]

Agree we had same error - saved us too. Awesome video Fully Airconditioned. Thanks

[@nbarry2346]

Thank you. I had the u4 code and did what you said, turned off the power in the breaker box and by golly it is working. we don't need air conditioning here very much but today it is great.

[@FullyAirconditioned]

That’s good to hear it running again, u4 fault is one of the most common faults on a daikin, it’s a communication error between the indoor and outdoor pc board. 95% it caused by power problem, like a brown out (supply power voltage too low or too high) if you have the reset the power and now working it should be fine, if it came back with a u4 fault straight away this means that the indoor unit can’t see the outdoor unit and there is a problem with connecting cables or the pc board ( no power) 👍🏻

[@johnhamilton6003]

You guys are a bunch of legends. This video has solved my weeks of painful suffering through heat. I'm also in Canberra and fully intend on using you guys for any air conditioning related issues from now on.

[@FullyAirconditioned]

John Hamilton Happy to help

[@mrbusiness2684]

Thank you. I fixed my neighbors heater thanks to you. They had no heat for weeks in freezing temperature.

[@elenastyles7206]

Super easy! Thank you so much! I just diagnosed fault code U8 and fixed that fault on my heat pump using your video! And its working! Thank you for making this video with really easy instructions to follow!

[@fatdad2052]

Thank You, Down Under! My AC had the exact same error code as in the video, but my error was caused by snow covering the outside unit. All is reset and working great. And yes, in anticipation of any questions like why I need AC when it's snowing, the AC unit is for a computer server room and needs AC 24/7. Again, thanks!

[@FullyAirconditioned]

+Fat Dad No problems mate!

[@jackierozenfeld6671]

Many, MANY thanks fro making that youtube. Today is 43 degrees and last night we had a black out. My aircon has not worked since. The instruction manuale gave no clue what to do but your video was like a personal tutorial. Bless you!!!!

[@Timbzy]

Absolute legend. Found the error and fixed it myself. Was seconds away from paying someone to do something I could have done myself quite easily.

[@FullyAirconditioned]

All good Brendan, glad I could help 👍🏻

[@greghagger6504]

Thanks for your great information. Every year is the same , when I want to start the air con , no go. Thanks to your informative video I can just turn off the circuit breaker , and back on again and it is fixed. Saving me a service call. Thanks. Merry Christmas to you and your family.

[@Findsman]

Thank you for posting this! I was extremely frustrated and couldn't figure out what was wrong. Thought I'd have to invoice it. That was much easier than I thought it'd be. Thanks again!

[@Beastmetalreview]

Thank you. It is a sticky night in Pattaya. Your video helped me reset our Daikin.

[@annalkirk]

Hi there Craig,Thank you so much. Its boiling hot in Sydney - 35 degrees - October long weekend and I'm in west facing warehouse with huge windows. You can imagine how dreadful with a failed bedroom Daikin air-con which is now well over ten years old - implications...Anyway I am thrilled to report that following your simple instructions - had to attempt reset twice - the old boiler is back up and running (for now). Will leave it on to test. A really big thank you!! Anna

[@christinechan1605]

Thanks Fully Airconditioned, your video is sooooo helpful! The Daikin instruction manual was really useless, i had a U2 problem and you have saved me from calling a technician. Thanks again!

[@cookcrazy]

Thank you! Your video described exactly my symptoms and showed me exactly how to find my fault code in mere seconds! Well Done! Thanks as well to the link in the description to the fault code PDF - it is better than the one I received with my Daikin original documentation.

[@FullyAirconditioned]

All good 👍🏻

[@ninadaggett]

Thank you this was so so helpful! I'm currently housesitting and had no idea how to fix it, it worked on first night and not the next. there was a green light on so I knew it was something simple but the manual guide just made no sence. Thanks again so much!

[@ashchedrin]

It was very helpful! I knew my device is much more recent but I tried the approach and it worked. First: kudos to the author of the video, and second: many thanks to Daikin for the backward compatible design!

[@FullyAirconditioned]

Hi Alexey Shchedrin, Yep DAIKIN’s fault finding process works on much older and far newer units.

[@TheKappytime]

You are a good man! Saved our vacation (at least, for my wife and I in the front bedroom :-) ) Thanks from San Ignacio, Cayo District, Belize, C. A..

[@nettygreen7625]

Thanks Craig, after a power outage in area my split system was not working, I followed your trouble shooting & yay it's working!! Thanks so much :))

[@punkybrewster01]

Thank you! I managed to get it back up and working due to your video, it's cold in Tassie, so I'm very thankful

[@nwachukwuhope33]

even though i wasnt using daikin, this video helped me in resolving the same issue. thanks man! Issue lasted for more than a month but now i got back my aircon

[@alirobe]

Thanks! Had a U4 comms issue at 1AM. Resetting the breaker fixed it. Life saver :)

[@FullyAirconditioned]

Ali Robertson glad we could help

[@FullyAirconditioned]

Glad we could help

[@FawadBilgrami]

Wow, that helped me big time. The heater didn’t work after power cycle but going through errors somehow restarted it. I had a long beep on E7 too.

[@scottoman]

thanks so much. i'm really ill right now, in cambodia where it's super hot, and aircon stopped working..but now it is again! i couldn't handle having technicians or my landlord coming/going today. must rest.

[@FullyAirconditioned]

Scott Oman glad we could help, I think your the 1st comment from some one that is in Canberra like us 👍🏻

[@SueElliott12]

What a great video-sorted out my aircon problems in a heartbeat....thank you! Much easier than trying to read through the manual

[@FullyAirconditioned]

+Sue Elliott All good, glad we could help.

[@ianquarrell1149]

Thank you, thank you for solving our problem for us and getting our heat pump going again!! You are the BEST!!👍🏼❤️👌

[@kraljburgija]

Your video was great help, (needed a shut down and restart from the main switch board only). Thank you so much!!!

[@mareevitale8152]

Thanks SO much! I'm not a tech mind at all & by resetting the circuit breaker on my switchboard it worked!

[@TER1987hunny]

On a 100 degree day you just saved me from melting inside my house thank you !!

[@FullyAirconditioned]

Thanks, it’s winter here, currently -3.5 degrees or 25 Fahrenheit 🥶

[@Alex-ut7xs]

Reset E7 error successfully via turning the power off. Thank you so much !!!

[@eugeneb3682]

Beautiful explanation. God bless you abundantly brother

[@FullyAirconditioned]

Thanks bro 😎

[@hazard8395]

got an e7, outside unit just needed to be turned off and on again. great video, thanks

[@20EUR20]

the link in your description is very useful

[@FullyAirconditioned]

Glad to hear that

[@susanclarke6311]

Thanks you so much it works 37c & I had the blinking light on the split system kept turning off . Did what you said & it’s 👍🏻up & running again 😀👍🏻

[@brendanfoley2017]

Great video, very clear and easy to follow, I can finally sleep again

[@djstile75]

This is really useful. I have a U0 error - shortage of refrigerant. Now I just have to work out what that means!

[@FullyAirconditioned]

djstile75 call the people who installed it or a daikin tech for that one.

[@josephraji]

👍well done,good Jod,,greatly appreciated for your efforts. It was really helpful for a growing technician,hope you upload more .Thank you

[@bjosephrdt]

Thank you very much for your time and effort ,greatly appreciated. looking for more tips for a learning technician,

[@BernardDuggan]

Hi Craig, just wanted to say 'thanks' - you just saved me an awful lot of effort and possibly money :)

[@piopotatosack]

really helped me out. I got a U2 problem (insufficient power supply) and was able to restore the power.

[@FullyAirconditioned]

Cool 👍

[@angeltinoco229]

How did you restore it. I have the same error code

[@jasonwade2804]

Cheers mate, extremely useful. I actually had the E7 fault.

[@TalismancerM]

Cheers for this. I have the E7 fault too. Now to find what's blocking the fan on the roof!

[@mihaelniko]

Holy shit! A lifesaver

[@FullyAirconditioned]

Thanks 😊

[@lesleyporter5542]

Brilliant had not idea what was wrong until i saw this... Thanks so much x

[@anhsonnguyen9658]

Got it working thanks to yours easy step by step guide.

[@georgekatsikeros9721]

thank you i didnt know what to do and this sold the prob ,thank you

[@ak8510]

Sir, you are a saint and a scholar. Bless you, for this video.

[@YnkeeDoodlFlppyDisk]

This video SAVED ME. THANK YOU!

[@FullyAirconditioned]

There is a button on the front of the unit (near the lights) that turns the system on and off, but it goes in to a preset mode, not the the current setting you had on the remote, so it will cool if its hot and heat if it cold.

[@Thelegend-qo5tf]

Thank you so much it was really helpful good on you mate

[@self-preservationsociety7057]

Great video thanks , very helpful, learned how to fault find 👍

[@FullyAirconditioned]

All good 👍🏻

[@youthsonamisson2937]

THANK YOU SOO MUCH FOR THIS VIDEO THE ILLUSTRATION REALLY HELPED

[@catdog568]

Thanks so much, fixed the problem!! Legend!! :D

[@starlord1219]

THANKS BRO! u just saved me 🙌🏻 my fault was a U2. #Most helpful Video ever

[@pauldibb313]

Great Help! Thanks a heap! Worked like a dream!

[@RineboBohead]

Very brief and helpful, thank you.

[@LucaAliberti]

Man you saved my life! Thank you!!

[@FullyAirconditioned]

No worries mate 👌

[@drakedogy]

Thank you very much, solved the problem for my family.

[@proglobal1231]

Hi, Great video! The fault (long beep) I have is "L5 - Inverter instantaneous overcurrent (DC output)". I also have a double beep for "L3 - Electrical box temperature rise" and "L4 - Malfunction of inverter radiating fin temperature rise". Is this something that will require a technician?

[@mancowdogpig]

Thank you this is great. Sadly I diagnosed something that needed someone to come so doesn't help today U0 (low refrigerant). But at least I know.

[@geoffpurcell7904]

Great video guys! I came up with a U4 fault code - malfunction of transmission between outdoor and indoor units. I've recently had it rewired as it was on an illegal circuit. Any suggestions?

[@FullyAirconditioned]

P4 fault is caused by a voltage reading above 4.96v or below 0.4v of the radiation fin thermistor, often a open circuited thermistor is the cause or poor contact. There is about 10 -12 thermistors on the outdoor unit, the one you should be checking is the one plugged in to S91 on the PC board and its thermistor R12T. Cross reference the temp to the measured resistance "check No 6" in the Daikin services manual, this should be carried out by a qualifier technician. Kind Regards

[@totamohamed9474]

Oh my god , thank you so much mate 😍😍😍😍

[@FullyAirconditioned]

Hi Justin, If the system is new call the Daikin dealer that supplied and installed it, as it has a 5 year parts and labour warranty. Kind regards

[@fireheart1026]

My air conditioner is throwing warm air properly but not cooling...it only cools when it feels like! Can you please suggest a remedy? The gas was filled 1.5 years back only!

[@FuelTim]

Huge help - thank you!

[@davidwhittle4554]

Bloody legend, videos are good for the record

[@harryz3314]

Thank you so much for making this video. It helps a lot!

[@harryz3314]

My error code was E7 just like the one in the video but nothing was in the fan. I turned off and then turned on the switch of outdoor unit. After that, the problem was fixed. Hope everyone watches this video can get their air con back to life.

[@FullyAirconditioned]

Glad to help

[@FullyAirconditioned]

👍🏻

[@rotorheadstu]

Thank you, sir. Made a f*ing adventure a simple fix (for now). I owe you a beer!

[@FullyAirconditioned]

cheers

[@SpraYeRS77]

Goodmorning craig. I have a daikin multi point aircon with 4 head units and one heat pump outside. The aircon seems to be turning itself on by itself. I checked to see that the auto infrared sensor was off on all the controllers. I suspect the infra red motiondetection built in to the aircon is malfunctioning even when off. What do you think?

[@Actioned65]

Hi and thanks for the video, helped to fix our A/C in a jiffy (it was a U4 comms error)

[@hvac01453]

Good video, simple and to the point. I wonder when will all these HVAC companies will have a downloadable in full English explanation thru a USB cord to an iphone or iPad or PC . The technology is there and easily do-able for Gods sake... I’m just sayin’......

[@FullyAirconditioned]

hvac01453 They have, Daikin and LG have a dongle you fit to the outdoor unit that Connect’s to your phone by wifi and gives you all the sensor temps, compressor speed, current draw, faults ect, but its a services tool for technicians. Kind regards Craig Hewitt

[@courtneyclark5415]

Hi thanks for your help, I have a daikin fvxs50 heat pump and I'm getting a u2 error the out door unit is not starting up the fan spins freely by hand, when I cycle power on and off I can hear a noise under the cover on the right hand side near the wiring sounds like electronics trying to tell it to start ? But it doesn't would you have any ideas? thanks Courtney

[@buildingsbyair]

is there a way with teh controller to adjust the temperature offset?

[@jayashrishobna]

This is extremely helpful. Thank you!

[@robyncameron9423]

New Daikin air conditioners - one in living room second one in bedroom. Have not needed to use either much since installation about five months ago. Our apartment on 11th floor and exposed to high winds. Both machines develop a 'clopping' sound, both during operation and also when not switched on when exposed to strong wind. Any suggestions please?

[@nasserjari2829]

Hi thank you for the great video it's full of information I have a Diakin mini split air condition in the outside mainboard there is a green light 💡 flashing and the remote control doesn't show me any error code can you please tell me what the problem thanks in advance.

[@FullyAirconditioned]

Think you would need to call your local daikin repairer to sort out that one

[@callandergirl7752]

SO helpful! Thanks a million!

[@beroecaaaa]

I was about to freeze! Thank you for the help!!!

[@philljm544]

I don't know if this is any help as of now. But L5 is the same problem as I am having which is "L5 Outdoor Comp motor ground fault, Short circuit"

[@EvilMorty22]

Hi, thanks for the video. Very helpfull. I have the error kode U0. From the list i see that this means that it has a "Shortage of Refrigerant". Does this mean I need a service man to come and fill up the refrigerant?

[@PoloGoose]

Thanks for this! I had a blinking green light and found this video and ran your diagnostics. However nothing was found, as it only long beeped when back to "00". Do I need to service my air conditioner?

[@mcownz]

Did you ever figure this out? Thats what im getting with mine.

[@Iatethekush]

@@mcownz you figure this out?

[@Kokonutjuice]

Exacty issue with my unit. All fixed now, thanks so much mate!!

[@tonimazzocchi6907]

Thanks so much for your helpful video, we learned how to fault find on the remote, this is really helpful but............ No Fault detected on our unit and the green lite is still flashing and it wont turn on. Also the pc board was replaced 2 years ago and the unit doesn't get much use as it's in a holiday house. Please Please Please Help as in Melbourne we are frying We appreciate all the advice we can get! Regards Toni

[@sokree1]

THANKS MAN, YOU ARE A LIFE SAVER!!!!!!!!!!!!!!!!

[@FullyAirconditioned]

sokree1 Yessss, I love saving lives! :)

[@bergsekul]

But anny ways thanks for your explanation and ill wait for your new video

[@rubich5264]

Dude, I can't thank you enough!!

[@FullyAirconditioned]

😊thanks

[@FullyAirconditioned]

Hi Julia, Dose it have power??, Check the circuit breaker is turned on (like in the video where I turn on and off the circuit breaker in the switch board) check the isolator switch is turned on (should be located near the outdoor unit, not all installation will have a isolator). Could be an internal fuse, checking this should only be done by a licensed person with the correct training as the unit contains high voltage and could cause death, leave this to your local daikin dealer/repairer. Kind regards Craig Hewitt

[@ralphfontcuberta130]

So if you're hearing impaired, or have tinnitus, you're poop out of luck in finding out what's wrong with the system and will have to call a service rep. Great; thanks, Daikin.

[@bcsirke]

Hi, thanks for the video! each summer my air conditioner works for a few hours, then just stops with the error code U4. Any tips..? there is an outdoor and an indoor unit.

[@johnyi205]

firstly than you for make this video it have help me alots if you could make more of them would be great...thump up

[@pushingdasies1]

Thank you for the help. I got a U0 code after an install. There must be a leak somewhere

[@pushingdasies1]

Why does the letters jump through weird orders? Is this testing common or worse errors before getting to less common ones?

[@FullyAirconditioned]

If it’s just been installed and the 1st time you use it, you get a U0 fault it’s possible a closed services valve. The person installing it may have left the service valve closed. If it was running working and now not with this fault code then you possibly leak.

[@FullyAirconditioned]

@@pushingdasies1 don’t know why Daikin have made so the faults are not in order, but it’s not as you suggested.

[@pushingdasies1]

@@FullyAirconditioned Thank you for the tip. I'll take a look at the service valve and see if that's what's causing it. It was a new install and my installer pressure checked it for leaks before leaving and bubble tested all the connection points. Hopefully it's that and there isn't a leak somewhere

[@FullyAirconditioned]

@@pushingdasies1 they should be using a vacuum gauge, pulling a vacuum below 500 microns, check if it holds, can’t rise more than 100 microns in one hour. Bubble test with just the standing refrigerant charge is not good enough and doesn’t meet the standard.

[@AMMSP80]

Really thks. Helped a lot

[@FullyAirconditioned]

You're welcome!

[@blazian81]

Question my fault code is E7 but there's nothing blocking the fan?

[@cyrylledaphne2434]

hello! ours have one beep at some and many others that do not have beep at all. does that mean that the "muted" one are the faults?

[@FullyAirconditioned]

There is a second way to check, I will do a video soon, hold the temp up and down and the mode at the same time for 5 sec. This should bring up a code on the controller with just the 1st digit flashing. Changing the 1st digit with the up or down button till you get a double beep. Once you have the double beep push the mode button once and now the 2nd digit should be flashing, change the digit with the up and down button till you get a long beep, each time you change the digit you will get a double beep as the 1st digit is correct (part of the fault code). When both are correct a long beep will be emitted from the air conditioning unit . This will be the fault code. kind regards craig

[@fluroarmadillo7380]

Thank you so much!!! You saved us!