VRV3 | Basic step for unified AC communications troubleshooting | error U4

Brand : Daikin VRV3
Model : RXQ18PAY1
Error : U4
#bonmj #daikin #airconditioner

[@HajaShah]

Boss ur knowledge for VRV aircon is awesome👍🏽👍🏽

[@BonMj]

Thanks 👍

[@keovongvilaykeo4799]

Great troubleshooting thanks 🙏 you for sharing 😊

[@BonMj]

Thanks for watching!

[@alexandergorelov2515]

Thanks a lot for this video! Very interesting.
Service checker is really recommend for maintenance!

[@BonMj]

You are welcome!

[@peramaraj2763]

Thanks for your update video sir

[@BonMj]

Always welcome

[@mallkomoha6823]

Thanks for sharing Bon

[@BonMj]

You are so welcome

[@reynoldroncesvalles8293]

Good day, sir, Bon,pls, need, resetting warless control of vrf, pls shares actual videos,, thanks 🙏🙏🙏

[@reynoldroncesvalles8293]

Panasonic warless, control, I need, sir,Bon,,,

[@salimagwan9672]

Nice job sir👍

[@BonMj]

Thanks 👍

[@thanaung3154]

thanks a lot for Sharing video 🙏🙏🙏

[@BonMj]

Most welcome

[@phathuynh4325]

Nice job Sir

[@BonMj]

Thanks

[@mojeshmeenuga8432]

Thanks sir😊

[@BonMj]

Most welcome

[@mohamadafravi1160]

Hi 👋 my friend. So useful video. 👌

[@BonMj]

Thanks

[@mohamadafravi1160]

Please make a video of the branch controller

[@BonMj]

@@mohamadafravi1160👍

[@Marcoguima45]

Good Job 😎🇧🇷

[@BonMj]

Thanks

[@bunyamingul9607]

👍👍

[@BonMj]

Thanks

[@thanwin3920]

Thanks Sir

[@BonMj]

Welcome

[@janshaw5472]

Good😅 job 👏

[@BonMj]

谢谢

[@sv6k0a39]

Is that "Gas Temperature" the suction pipe temperature reading? Or is it the refrigerant saturated temp from a pressure transducer?

[@karaors8970]

👍🧿👋

[@BonMj]

Thanks

[@user-ol4sw6rm3h]

Great video can I purchase a service checker from Singapore!

[@BonMj]

From Daikin

[@abarrasheed3098]

Sir when replacing main PCB in master unit vrv 4 how to set dip switch settings please reply thank you

[@monosolution5424]

Hello teacher Bon Mj how are you? May you help i want to ask you one question? Now I am install VRV IV System and owner house have Electricity three phase 100 ampere.And The machines Master 40A slave 1=30A slave 2 =30A it is enough or not? Thank you in advance.

[@AK-yu3cu]

Please share link for testing & commissioning Daikin VRV IV & X models

[@BonMj]

czcams.com/video/RleCvum-bEQ/video.html

[@user-wq4hn1ni9l]

Hi sir, if one indoor fault ‘C4’ , all system will fault ‘u4’/‘u9’?

[@BonMj]

No

[@user-wq4hn1ni9l]

Hi sir, my indoor all fault u4(outdoor model RXYQ12PAY19)
How to check indoor and outdoor electronic board broken?

[@BonMj]

Outdoor Pcb power light ok?

[@user-wq4hn1ni9l]

@@BonMj power light is ok

[@peramaraj2763]

I have a doubt sir VRV-3 got error code U4 we check and found control PCB fuse burned after replace the fuse than test run running amps 8 to 9 reached again fuse burned we checked incoming voltage is normal so what is the issue ?

[@BonMj]

Check power supply,voltage ok?
Check fan motor and compressor

[@peramaraj2763]

@@BonMj thanks for your update sir

[@jairam425]

Hi sir
I'm ram, Form dubai
In My working site samsung vrf digital inverter, duct-table FCU have a problem since 4 months, vrf outdoor have 3 indoor units connect The problem is 3 FCU's fan moter speed not controlling in thermostat always running high speed in a month 1 and 2 days fan speed controling , we connect laptop tyred to control fan speed
1) we did three time programming
2)we changed fan mothers
3)we changed fan capacitor
4) we changed FCU pcb
5) we checked communication cable its proper condition
6) we changed fan control
7) we changed outdoor main pcb
8) we checked 3phase power with meger power normal condition
Plz give a suggestion ( I don't now the vrf system FCU fan speed why some days controlling some days control maybe fault from outdoor sensors because some days working some days not working)

[@BonMj]

Any error

[@jairam425]

@@BonMj No error sir
and Today started other 2 apartment same problem facing
(I note a point In UAE Since yesterday evening Too much humidity total Vrf units outdoors at night time sweating because of humidity) I can't understand

[@peramaraj2763]

I have a doubt sir city multi VRF error code :6600 M-Net address is 009 but remote appear 015 what is the cause of problem sir please explain to me

[@BonMj]

Do the system two Fcu using one remote?

[@peramaraj2763]

@@BonMj no sir one fcu and one remote sir

[@arjunapeiris981]

What is your mail address sir

[@BonMj]

[e-mail]

[@arjunapeiris981]

Thank you sir. My name is Arjuna peiris I will send masege for your mail.

[@user-wq4hn1ni9l]

Hi sir, if one indoor fault ‘C4’ , all system will fault ‘u4’/‘u9’?

[@BonMj]

No

[@BonMj]

If many Fcu in one system, normally U9 Fcu are ok, check other fcu

[@Steven-vy7en]

hi sir ,can i know how to check vrv 3 6hp compressor cannot run at high speed and no show error code .tq

[@BonMj]

Check indoor and outdoor thermistor reading and pcb

[@Steven-vy7en]

@@BonMj ok tqvm👍👍👍

[@Steven-vy7en]

@@BonMj hi sir, i had check the indoor & outdoor thermistor reading no problem but when starting compressor running high site 350psi & low site 60psi amp 13.xx the compressor will run low speed high site 250psi low site 110psi amp 6.xx