HVAC: Daikin VRV Heat Pump Not Heating/Cooling (Error Code L5) Daikin Inverter AC Service Call

Today we are working on a Daikin VRV Heat Pump (RXYQ SERIES) which gives us a L5 error code on the thermostat. Lets take a look!
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Daikin A Error Codes
AO Indoor Error of external protection device
A1 Indoor PCB defect
A3 Indoor Malfunction of drain Level control system
A5 Indoor Freeze-up prevention
A6 Indoor Fan motor lock - overload
A7 Indoor Malfunction of swing motor flap
A9 Indoor Malfunction of EEV
AF Indoor Drain level above limit - clogged
AJ Indoor Malfunction of capacity set device
Daikin C Error Codes
C3 Indoor Malfunction of drain thermistor
C4 Indoor Malfunction of liquid pipe thermistor
C5 Indoor Malfunction of gas pipe thermistor
C7 Indoor Lower louvre limit switch - motor
C9 Indoor Malfunction of air thermistor
CC Indoor Malfunction of moisture sensor
CA Indoor Malfunction of discharge air thermistor
CJ Indoor Malfunction of remote control thermistor
CE Indoor Malfunction of radiant heat sensor
Daikin E Error Codes
E0 Outdoor Activation of outdoor safety device
E1 Outdoor PCB defect
E3 Outdoor Activation of high pressure switch
E4 Outdoor Activation of low pressure switch
E5 Outdoor Activation of compressor over heat protection
E5 Outdoor Compressor motor lock
E6 Outdoor Compressor start up error
E6 Outdoor Standard compressor lock overcurrent
E7 Outdoor Fan motor lock - Overload
E8 Outdoor Inverter input overcurrent
E9 Outdoor Malfunction of EEV
EA Outdoor Four way valve defective
Daikin F Error Codes
F3 Outdoor Abnormal discharge pipe temperature
F6 Outdoor Refrigerant overcharged
FC Outdoor Low pressure drop
Daikin H Error Codes
H3 Outdoor High pressure switch defect
H4 Outdoor Low pressure switch defect
H6 Outdoor Compressor motor position detection sensor error
H7 Outdoor Fan motor position detection sensor error
H8 Outdoor Current transformer error
H9 Outdoor Malfunction of air thermistor
Daikin J Error Codes
J1 Outdoor Faulty/Fault of pressure sensor
J2 Outdoor Current sensor Faulty/Fault
J3 Outdoor Faulty/Fault of discharge pipe thermistor
J4 Outdoor Low pressure saturation thermistor
J5 Outdoor Faulty/Fault of suction pipe thermistor
J6 Outdoor Faulty/Fault of heat exchanger thermistor
J7 Outdoor Faulty/Fault of heat exchanger liquid thermistor
J8 Outdoor Faulty/Fault of liquid pipe thermistor
J9 Outdoor Faulty/Fault of gas pipe thermistor
JA Outdoor Faulty/Fault of discharge pipe pressure sensor
JC Outdoor Faulty/Fault of suction pipe pressure sensor
JH Outdoor Faulty/Fault of oil temperature sensor
Daikin L Error Codes
L0 Outdoor Malfunction of inverter
L3 Outdoor Electronic component box overheat
L4 Outdoor Inverter cooling defect
L5 Outdoor Comp motor ground fault Short circuit
L6 Outdoor Compressor motor grounding short circuit
L7 Outdoor Total input overcurrent
L8 Outdoor Comp overload - Motor disconnected
L9 Outdoor Compressor lock
LA Outdoor Power unit malfunction
LC Outdoor Transmission between inverter and outdoor
Daikin P Error Codes
P1 Outdoor Inverter over ripple
P3 Outdoor Thermistor abnormality
P4 Outdoor Power unit humidity sensor malfunction
PJ Outdoor Failure of capacity set resistor
Daikin U Error Codes
U0 System Shortage of refrigerant or EEV failure
U1 System Negative phase, Open phase
U2 System Power supply insufficient
U3 System Wiring check operation not executed
U3 System Mismatch of indoor and outdoor 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 outdoor units
U8 System Transmission between master and slave RC
U9 System Transmission error between indoor to outdoor
UA System Excessive number of fancoils
UC System Address duplication of central controllers
UE System Transmission error between indoor and central
UF System Refrigeration system not set wiring - piping
UF System Terminals 1 and 3 crossed (Split Skyair)
UH System System error Refrigeration system set up
Daikin M Error Codes
M1 System PCB defect
M8 System Transmission error between central controllers
MA System Improper combination of optional controllers
MC System Address duplication Improper setting
Daikin Number Error Codes
64 VAM Indoor unit air thermistor error
65 VAM Outside air thermistor error
6A VAM Damper system alarm
6A VAM Damper system and thermistor error
6F VAM Malfunction of remote controller
6H VAM Malfunction of door switch or connector
94 VAM Internal transmission error
Type in your error code below! Get an instant answer from Daikin
www.daikin.com/products/ac/se...

[@4625boowoody]

Great vids man. Thanks for sharing and explaining SO much. These new, more efficient systems are quite advanced. Worked in IT for 30+ years and tech support was a very common call. Good to know the same is available for you guys. Stay safe out there!

[@manonfire3642]

Cool, calm and collected; that's what exudes from Jumper man Tech plus knowledge that's necessary to succeed in the HVAC field. Great channel. Thanks for sharing. Also, if Milwaukee Tools gets a notice on this channel, they should, like another viewer suggested, give you a heated jacket for your advertising.

[@musakavalci9470]

You obviously love your job. Big respect from London England

[@67tr876]

Awesome work !! You should get that heated jacket by Milwaukee for being on that cold roof.

[@izzybell11]

Very helpful , interesting and well explained video. Great job. ⭐️⭐️⭐️⭐️⭐️

[@bmillwood6666]

It's a wonder tech support even talked to you. Usually you have to be a distributor and be certified to work on daikin vrvs.

[@punchpunchowned]

Very helpful, new to VRV but not HVAC, thanks!

[@wd8557]

There shit is crazy, I went through the same shit at General Motors, they where like hit this button 14 times, wait for this, now hit it 20 times. I was like how about keeping it fking simple and just showing what's wrong period. Fking engineers.

[@simohvac9222]

nice work man, great explanation keep going

[@hkhsm359]

Nice troubleshooting . Thanks for sharing

[@kennethlobo4420]

Thanks for sharing and the descriptions on error code

[@andyjones7836]

Good video!! Very useful.

[@alexeytech1495]

Great professional video

[@sv6k0a39]

If the compressor runs but stops, its usually the Inverter Board. If the compressor was silent, the compressor is bad (sometimes it kills the inverter board too).

[@ademir-tr7487]

Parabéns pelo trabalho

[@user-ut3uy3oo9u]

great video thanks for sharing and keep them coming!!😊

[@aaronp.888]

Great video

[@keovongvilaykeo4799]

Great video thanks for sharing

[@derrickgarcia303]

Tech support is our friend!

[@JumpermanTech]

Agreed! Thanks for watching!

[@willromerocomedy]

great job. I went through same issue L5 code. went through the daiken app. however they wanted a case number .

[@neilvestervictor180]

I saw this error an problem with this brand on a English a.c. tech lol great job

[@joshuabest100]

It surprises me how clever these bloody little board really are

[@serviceacbekasi4733]

God job mr

[@luisfortini6123]

good video so simple thanks

[@ericsantana6549]

Keep giving us these great videos. Helping a junior mechanic right here making me look good. Lol

[@davisonmaduku1522]

explanation good helpful

[@stevealoia]

Diakins tech support are great if you get the right people. I had called one time and a Asshole . Who made fun of the way I a pronounce a word . I’m a big fan of Daikin But some people should not do tech support. Great video . Thank you

[@sherwinalvarez7365]

Its great that you said call technical support. If its not a refrigeration issue i get stumped. Everyone want to act like they are pros with these inverter units and there is no possible way. Everyone tech support is reading a flow chart. Totally different on a split or package unit. I am no longer gonna be ashamed to call tech support. I know you know your shit and called them. So now i know that's the right thing to do. Thanx. As always great video.

[@tbugs4561]

It's a shame they don't teach you how to call tech support when you're at refrigeration mechanics school

[@sv6k0a39]

Yeah these units are proprietary and very complex. You need to have a list of all the common checks for Daikin if you work on them. We managed to get it from Daikin themselves.

[@ivanckwan]

Did you have to adjust settings to disconnect the slave unit?

[@triteguh1953]

Good 👍👍👍

[@pubchat2913]

Great video man. General question here, is it an issue running the unit with that side panel off for too long? Would mean most air is being sucked through the opening instead of the condenser coil right? And do you think it would have been a good idea to cover the other condenser fan motor on the other side that’s not working? Or was that condenser fan motor spinning anyway? Thx

[@samuelaranda4597]

Great job. We’re you located being so cold.

[@juampynieto7277]

hello good morning, greetings from Argentina. I have the same error, I checked the compressors the same way you did. What if I have a machine with a single condenser and 2 compressors instead of 2 condensers (master and slave) with two compressors. I would appreciate your reply.

[@Modello40]

Try not to keep the slave coded out for more than 24 hours. The master and slave units on the vrv4 share a common oil line. When it goes through its oil return sequence, it effectively starves the master. Had this a few times where someone has coded it, and left it running for the customer and basically cooked the comp. Do you have an inverter checker to test your board to comp wires? Great vids btw, really enjoy watching them

[@bariboy87]

Currently doing my apprenticeship for refrigeration. Professor said to properly use an amp meter clamp, make sure the wire being tested should be in the middle, of the clamp, not touching any part of the meter, for the most accuracy. If you have it on the edge, like in the video, the reading can be off a significant amount of amps. Haven't tried myself yet.

[@HeathenGeek]

comment for the algorithm 🙂

[@dimaslespier2688]

You can also use the Daikin app. It will point by point run you through. If tech support takes to long to answer.

[@rdenir]

In Sydney, Australia, Daikin are a 3-4hr call back service for tech support..

[@ibrahimamac]

@@rdenir honestly I don't know how he talked with tech support. NY area is same thing. tech support sometimes calls you next day. it is better having service tool.

[@rdenir]

@@ibrahimamac it’s better to buy Fujitsu,, If I call Fujitsu tech support, Usually within 15 minutes I will have a tech on the phone

[@ibrahimamac]

@@rdenir you are right. But When people calls you for service call. Unfortunately it is mostly daikin units were installed in Ny area. you have to point out exact problem. Sometimes one fan motor is bad but you gotta change both condenser fan motor with the inverter. There is no point installing units if you aren’t going to get customer support when you need it.

[@rdenir]

@@ibrahimamac yes unfortunately when you get to a job and see the Daikin unit it’s too late for that,, Admittedly Daikin are good units, it’s just the after sales service that is poor in my opinion,, Last December I had a client call me about her Daikin VRV A/C unit not working,, I diagnosed a faulty Inverter board and she told me the unit was only 18 months old,, I told her to get onto Daikin and get them to repair under warranty,, a few days later she called me again and asked if I could just repair it and she would pay me direct,, Daikin had told her that they couldn’t get a warranty tech out there before February,, Here in Australia, Dec, Jan, Feb is out summer

[@Es0ter1ca]

It will always baffle me why techs still use analog manifolds in 2022. But that should be obvious. You really should be using a D-checker for Daikin equipment, you would’ve had your answer a long time ago and avoided cross contamination with the all the oils and acid that’s collected in those hoses. Old habits die hard

[@Cpt_bike_riders]

You're basically coding out 1x compressor on slave 1. 38 is master, 39 slave 1, 40 slave 2. Then select one compressor/pcb to code out . There's a faster way to check . Also it's weird that they use the smaller unit to be master or so it seems. Not sure from the vid

[@richardtillett9950]

Check the pcb rectifier case some time that goes out .

[@andyjones7836]

What do you use? Could you post a link please.

[@Modello40]

Have you been working on their newer R32 systems? They’re awful. So many issues with boards and comps going. Some less than 6 weeks old.

[@sontungle2641]

In Vietnam a lot of HVAC technician said the R32 refrigerant performance not as good as the R410A.

[@tbugs4561]

Daikin new sales technique but they offer 100% efficiency when the unit is not operating round the clock technical support which will cost you hours in callbacks part replacement as long as the unit is not five years old in domestic application just get a new one 410a is a mixture of drynitro and R22 it's cheap as chips but you need to reclaim the entire amount throw it away and charge with new gas

[@serviceacbekasi4733]

Daikin VRV ,jos

[@Mrcarloserwtf]

Daikin have way too many issues in my opinion with this VRV , I seen way too many shot compressors and relatively new units . Not a big fan of them , I rather a Mitsubishi city multi any day

[@m.haslam8495]

Very good point. Here in the UK, we design, install, commission and service the Daikin VRV for many years. Replaced many parts for the Daikin over my time. However, the Mitsubishi City Multi Systems are brilliant. Never had any issues with them. Some systems we have installed over 15 years ago are still going strong with no new parts fitted. Don't get me wrong, Daikin are very good, it's just that you are forever changing parts and it can become very expensive. Luckily on one site where Daikin is fitted since 2014, we have about 67No. VRV Condensers fitted. We have rarely changed any parts. This is due to having it installed and maintained at a high level.

[@Mrcarloserwtf]

@@m.haslam8495 that is very true and I agree , an good install can change everything .

[@adhityawijaya2684]

Error L8-05 solution please

[@jacobbundrick674]

Download the daikin Service app on playstore

[@triteguh1953]

How about 1 master and 2 slaves bro

[@tbugs4561]

You do all that work and then you find out the thing has an supply air sensor which is making it operate at only 30% guess what no air con is a five star energy rating . How do you convince your client to pay for the video clip too