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Repairing Daikin L5 Error
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- Опубліковано 24 кві 2021
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@MitchAttwood hello! Your video is very helpful! Do you happen to have a opinion on the situation when L5 error is not showing all the time? Iverter sometimes work sometimes not. Will the power stabilizer solve the issue? Thank you in advance!
Hi.Having the same error code on my Daikin Altherm low temp split heat pump.Any easy solution before i call out repair man.
Sir, I have installed Daikin AC and it's Model is DTKP50QRV16.
It's cooling was irregular till yesterday for past few weeks(edit: cooling way below set temp or not cooling at all). It showed L5 error.
But now the cooling is slightly back to normal as it takes upto half hour to cool the room at 22℃.
But, now it's showing error of U2.
Please help me figure out what is the likeliest problem with my AC.
It sounds to me that your compressor was faulty and has now taken out the Inverter PCB. If the Compressor is faulty then it won’t cool the space and can show up as L5. However, if you are now getting a U2 fault, it sounds like the Inverter PCB has been damaged.
So I would test the Inverter PCB with an inverter checker (I assume it’s faulty) and then test your Compressor with your multi meter (possibly faulty).
If the condenser fan plugs into the inverter checker, replace that too. If not then just leave it.
Good luck
Hi. a Daikin's inverter ac (ductless) whoes indoor continuaaton going on but the outdoor does not work at all.when I take out the communication wire from the indoor, put the line and neutral,then 20volt DC are coming on the neutral and communication.then later 2-4 voltage is coming.so is the indoor pcb bad are the outdoor pcb.......
Please reply me fast sir.... thanks
Please reply me fast sir please please please........
Is there any way to test a mechanically seized compressor?
No as there isn’t anything mechanically wrong with it but the Daikin unit will sense over current and cut out on a fault to protect itself.
In the case of an L5 error. You can only test the compressor windings and the board output. Let the customer know that there’s a slight chance it might have a locked compressor but chances are low.
I am NEVER gonna buy a daikin ac again. 1 yr in and I got the same error.
Dont ever buy a daikinn, its like samsung grenscreen
daikimeu ar condicionado quando funciona depois de um tenpo area disjuntor
Nice
Install the thermal paste like you would install it on your pc.
The surface of the ipm chip & the heatsink should be cleaned properly using isopropyl. Then a tiny amount of high quality thermal paste like the pc thermal pastes from brands like noctua & coolermaster should be used. Do not use your fingers on them once the surface have been cleaned with isopropyl. Apply the paste & use a clean plastic bag or spreader that comes with the paste to evenly spread it out only on the copper surface. Same should be done for the other recrifiers & igbts of pfc.
Adding too much thermal paste will reduce thermal conductivity & increase temperature of the parts.
One more important thing everyone should get is a surge protector.
I have 9 inverter units 2 of them are 11 year old hitachi models & not a single one of them had a failure other than rats chewing wires causing a short between the coms & mains & blowing up indoor pcb.
I have 5 panasonic, 2 Hitachi & 2lg all inverter mini splits ranging from 18k to 24k btu models. The lg ones are less than a year old.
Thanks for that information. I appreciate it!
Sir, this video pointed me the right direction so im leaving a comment so our fellow techs wont have to waste days googling like i did.
Outdoor unit: RXN50 with L5 error
A lot of people here asking how the pcb is tested in a possible overcurrent scenario. With a tester obviously, but i found this gentleman making one for nearly free and it works like charm:
ua-cam.com/video/hgBsa_j86Qk/v-deo.html
I brought this unit back from the dead last year. Some other machanics said they couldnt repair it because the discharge pipe was broken into the compressors head, took me an hour to solder it but managed to and it worked well until 2 weeks ago when the 4 way valve started acting funny, got stucked between modes and clogged the lines, it is possible that the unit worked half a day like that as i got home in the evening, Managed to free the valve by switching modes back and fort and worked well for like another week and then broke down with L5. I did suspect this outcome since it was rattling from day 1 however i wasnt sure if its the compressor and the pcb or just the compressor.
Its now time to find a compressor and a 4 way valve, or at least a compressor. I might just gonna leave the 4 way valve out and make it heating mode only due to economical reasons.
Keep up the good work and thank you for the informative contents!
Hi Mitch thanks for the info you are providing! My 6 year old Daikin system (RXM QVMA) is showing L5 and not blowing cold since the 24 th December of last year. A Daikin installer confirmed my suspicion of a dead PCB board for a $200 call out fee. (didn't make it on the day it was booked in, wasted day off work). He did not use an Inverter checker, but confirmed the board was not sending a signal or power? to the compressor. He suggests to replace the Board and Fan. The Quote is $1998...
I have confirmed the part nr (DAIKIN AIRCON OUTDOOR MAIN PCB-RXM60QVMA
Part Number: 4016709
$438.96)
Is this an ok price? Hasn't been the best year so far. A smiley face will do.
Regards Oliver
Send me an email and I’ll give you my two cents worth mate. Thanks
mitchattwood@maracservices.com.au
Helo sir. What cause Inverter board broken. I found many same problem L5 error at hotel that use key tag.
I’m not sure what ‘caused’ it on this one but it was the Outdoor Board that was the issue (not the compressor). After replacing the board, it has run ever since (almost a year now) with no issues. Is it happening on different units or does it keep happening to the same one?
@@maracservices on different unit
Hi mate, very interesting vid to see how you go about this. We've had three Daikin Alira X reverse cycle split system units installed. One big, 7kw one works perfectly. However, both 2.5kw units don't produce air flow when in heat mode and the fan outside doesn't spin when in heat mode (temperatures inside and out are within the operating range). After about 15 minutes the units show code L5. In cool mode, one of the 2.5kw units works perfectly, and the other one just blows air pretty much at outside temperature. Any ideas? We've put in a service request with Daikin, but I'm interested to know whether you have any theories on what could be causing it. It seems mad that there could be two identical PCB faults on two brand new outdoor units. Cheers!
Hey mate, that’s very odd that you have two units that are both doing it. I’ve been a tech for 15 years and only came across this error code once (although after reading the comments it sounds fairly common). The unit that works perfectly in cooling will have a faulty Inverter PCB like in the video.
The other unit that doesn’t produce cold air could potentially have a faulty compressor but most likely a faulty PCB as well. It’s a bit of a worry that two out of the three units you got installed have issues. For what it’s worth mate, the unit in the video has not missed a beat since replacing the PCB and it’s been a year so hopefully they get it sorted for you asap and that’s the end of it. Good luck!
@@maracservices Thanks so much for that, really helpful to understand it. Yeah, can't get my head around the odds of that happening in two devices, on something internal (I E. It's not even like mishandling would cause that particular issue). I've been coming up with weird theories in my head, but they are all improbable! Daikin are meant to be all about the quality so it's pretty disappointing. I take a lot of comfort from your comment though that, once fixed, it should stay fixed! Thanks so much again
What you didnt mention, was the fucking crazy price of that PCB.
If the PCB of the indoor unit is also spoilt, the home owner might as well buy a new aircond
Hi.sir,
A Daikin's inverter ac.in which error code h6 coming.I want to know from u what is problem with this... please reply me fast sir.............
H6 - outdoor compressor motor position detection sensor error
This error comes up if the unit has a signal to run but the compressor doesn’t start. Could be something as simple as the compressor relay cable being disconnected or alternatively it could be a faulty compressor 😬
U mean sir, so sir there will be odu pcb or compressor fault.,
If you have made any video on this please share link...
hi dear,
can you give me the solution for Daikin H0 error
Hey mate. Check to see if the compressor harness is connected properly to the PCB. If it is connected properly, then the PCB is almost certainly faulty.
What would a job like this cost to repair?
Daikin Prices:
Outdoor PCB: $258.19 Ex GST
Condenser Fan Motor: $193.16 Ex GST
+ The labour cost of the Air Conditioning Mechanic doing the work.
@@maracservices hopefully it is only one of the parts required
@@lukeloop I can almost guarantee it would be the outdoor board only. I just replaced the fan motor as a precaution because it was a warranty job and Daikin covered the parts. Good luck!
@@maracservices thanks very much - do u know anyone in Adelaide I could call?
@@lukeloop sorry mate, don’t know anyone from down that way. All the best!
You have put an annabond on this
Hi mate, how did you come to the diagnosis that you need to change the PCB and fan motor?
I’ve got an L5 error on unit I’m seeing tomorrow.
Hey mate, I've got an Inverter checker.
So basically, I disconnect the compressor terminals and plug the terminals into my inverter checker instead. Then when the system runs I can see if the PCB is sending a signal to the compressor or not. In this case it wasn't so I knew the PCB was dead. I also tested the compressor with my multimeter and megger but everything seemed fine.
If you don't have an inverter checker, I'd put my money on that it would be the outdoor PCB without even looking at it. If the shaft on the fan motor looks rusted, I would definitely replace that as well. If it isn't rusty, then just replacing the outdoor board should be fine. Let me know how you go!
@@maracservices hi mate,
Thanks for replying. So on inspection I noticed the liquid line Schrader was faulty and letting refrigerant by. During this I also went and checked the Compressor pins and got 0.8 across each of them which meant it was fine. I then check the EEV’s on the ports which were connected to two indoor ducted units. Received 0.47 between red and each cable on the connector which meant it was electronically okay.
I then recovered all the refrigerant knowing there was a leak on the liquid service port. 1/4 of refrigerant low. Changed the Schrader and pressure tested all fine no leaks.
System evacuated and put the 2.4kg in that was factory charge however when I had the system running the indoor cooling temperature was very high on 1 indoor unit however the other was cooling okay.
Further investigation and turned system into heating and working fine on both indoor units. Further visuals and could see frosting on the pipe work just before the EEV and high temperature on the other side of the line causing a pressure drop when it was In cooling I also only had 3.5 bar on suction. Very low.
So suspected failed EEV however the internal mechanical part…. Let me know your thoughts.
Thanks!
@@taylorhewitt5621 No worries mate. What exactly are you working on? For example, is it a Multi Head System? Are the indoor units wall mounted splits or ducted units? The reason I'm asking is, you might need to add refrigerant to the base charge for each indoor unit. That info should be inside the condensing unit cover. If the compressor is running, thats a good sign because the L5 error code simply means there is excessive current pulled through the transistor module (at least you know the compressor isn't locked). If it has wall controllers you can look at the thermistors and see if there is 6K difference roughly over the indoor coils which indicate its running fine and gas charge is right. I normally just hook up my bluetooth daikin service checker to get these readings to be honest. Also if its a VRV, you'll need to add the correct refrigerant charge and then hold down the test button on the outdoor unit so the unit can calculate how much refrigerant is in the system and run the EEV's correctly. I'm interested to know what you come up with. I'd just make sure the system has the correct refrigerant and the EEV's are working fine then if it still happens, I'd replace the Inverter PCB.
@@maracservices hi mate, good to hear from you, so it’s a Daikin 5 port 9kw Multi condenser. I have to systems connected to it. 2 x 5kw ducted units serving one room. I definitely have the correct charge as I weighed it in yesterday. I had to add some trim as it was only pre charged to 30m I was around 35m. We have spoke to daikin and they have also said what we have done is correct and that it sounds like a faulty EEV, which is the brazed connection on the line of flare ports and they will be sending a new outdoor unit. As mentioned in cooling set at 17° on the controllers one indoor unit was showing 11° coming off the grill. The other was sitting at 26° of the grill however in heating both heat great. Set at 30° I revive 50° of the grills. I was told that the units bypass the EEV in heating which would identify the EEV as the issue. I do not have a daikin service checker unfortunately however I just use my infrared to get that information or Bluetooth to the Madoka controllers. When you say about 6k difference is that between the liquid and suction pipes? Cheers mate 👌
@@taylorhewitt5621 Yeah mate, 6K difference between the liquid line going into the evaporator coil and the suction line coming out of the evaporator coil. The VRV's have thermistors on the either side of the coil so you can see exactly what the temps are from the wall controller if you go into the daikin menu and go to thermistors section. Unfortunately the standard ducteds don't have thermistors on either side of the coil. I'm surprised that Daikin are sending you a completely new outdoor unit. That's way easier for you which is good!
I think its just plug n play....
Hi mate , can you plz help me , Daikin split ac L5 error code , symptoms compressor starts for like 1 minute and then automatically cut and automatically starts after 2-3 minutes
What's the problem here ??
It’s either the compressor or the Inverter PCB that is faulty. When the compressor starts after 2-3 minutes, does it stay running or does it cut out again?
@@maracservices no it cuts again in 1 minute this same goes with condenser fan , but now the compressor is fully dead
@@chiragcvm sounds like the compressor is the problem to me. L5 means that the compressor is drawing to much current so the unit cuts out. I don’t feel comfortable diagnosing over the internet without seeing it obviously. I have seen it be a faulty PCB before like in this video so I always like to check that with my inverter checker however with the information you have told me, my guess is the compressor is dead, not the PCB.
@@maracservices i called so many technicians through Daikin service centre but some says PCB needs replacement some says compressor replacement is needed , and even one technician installed new condenser fan but still it is not working then i asked then what should i do they told me just buy new PCB which is costlier and if it doesn't work then we will not take it back we will not return your money then you have to buy compressor too , and both of the material cost too much here that i can buy new AC 😢
@@chiragcvm have any of these technicians you have spoken with come out and actually looked at the unit? It’s so easy to diagnose, would take me about 10 minutes to give you an answer if I was there. It doesn’t matter who you are or what company you’re from, the technician needs to check the PCB with an inverter checker and then check the compressor. That will give you your answer.
That's not repair. That's only replacing outdoor pcb and fan motor😅
Invetar ac very bad
Hi👤👨🔧
Hi
Woi..lu bener gk kerjanya tuh
Piece of junk came dead from the box. E5 since the 1 minute after installation. Daikin… - never
I got l5 error to these are peaces of shit these aircons
I feel that the Japanese brands put heaps of technology into their units which definitely make them less reliable that’s for sure. If they kept it simple, it would run forever.
@@maracservices I got it working I unscrewed the ground wire then switched the mains power of then screw earth back in and switch mains on and it works now but you have to give the generator time to kick in that should help a lot of folks out peace out
Is there any job for Indians