Daikin VRV | Troubleshooting indoor and outdoor unit communication problem | Error U4

Brand : Daikin VRV
Model : RXQ12AYM/RXQ10AYM (CU)
Model : FXMQ200MAVE (FCU)
Error code : U4
Cause : indoor/outdoor unit communication problem.
#bonmj #daikin #vrv

[@chandansahani8242]

He bon I want to take training with you only vrf and vrv please🙏 because you are a great teacher

[@BonMj]

Thanks

[@johnnyroxannebautista2063]

Your video is so informative and very helpfull to every technicians around the globe.
Thank you for sharing this.
You're the man Sir Bon.

[@BonMj]

Thanks bro

[@johnsonchirayat.4454]

Very grateful Experience from you Bon

[@BonMj]

Thanks

[@eduardovargasarancibia2628]

Hola por favor me ayuda tengo un sistema con el código Uf-01 pero en alguno termostatos me muestra u4-01, ya revise cableado y luz happ

[@brandonle4930]

Great Video Bon! Thank you sir.

[@BonMj]

Thanks

[@rajasekaran8420]

Great👍👍👍 job sir

[@BonMj]

Thanks

[@rdenir]

Good work Bon, so the issue was faulty FCU? Was it the indoor board or supply fan motor?

[@brandonle4930]

The issue is the main power supply going into the FCU. He ran a separate power source temporary powering that FCU.

[@nguyenthechung]

Thanks you so much! You're good men.

[@BonMj]

Welcome

[@nguyenthechung]

@@BonMj I just learned through the Internet, but you are like a teacher to me. I am very grateful to you! Wish you good health to work!

[@BonMj]

@@nguyenthechung 👍thanks

[@sv6k0a39]

So the power wire feeding that indoor unit was shorted to ground?

[@tamtez5909]

Hi Mr Bon, your video is very helpful. Could you please guide me how to ban indoor units, VRV4 has 6 indoor units, 1 indoor unit is to be disconnected from the power supply for repair, for the remaining 5 indoor units to still operate normally. Thank you so much for your support!

[@BonMj]

After disconnect indoor , reset outdoor power supply and long press return button.

[@tamtez5909]

​@@BonMjThank you for assisting me. Wish you good health to work

[@deshanabeysekara5124]

thank you very much for the video sir,I have one question.after cabling we want to give test run agai manually or not?..

[@BonMj]

Try use remote to on

[@lokeshlokeshkumar2107]

Hai sir.. Good evening

[@karimchiu7527]

thanks sir Bon

[@BonMj]

You are the best👍👍
Thank you very much. 🙏🙏

[@farelgaming3117]

Thank you very much

[@BonMj]

Welcome

[@aureliancioroiu8178]

Hello Mr Bon.
Why 2 of 5 indoor units does not have voltage?
I checked the supply til the branch and I have voltage.
I have to open the units to look the PCB.
there is probably something wrong with the high voltage side of the PCB?
Thanks for you support!

[@BonMj]

Check indoor fcu incoming power supply

[@matazglb5346]

I thank you so much.

[@BonMj]

Thanks

[@BERESHIDA2008]

what I dint get is, when you conect the multimer , did you selected continuity or volatage ? that wasent clear?

[@BonMj]

X1K

[@jiezhang730]

Hi Sir,
May I ask how to check the reason of showing U4 code for daikin RZP100? Thank you

[@BonMj]

Check comunication wire, indoor pcb or outdoor pcb + check incoming power supply.

[@angreentachairconditioning4687]

Nyc

[@samhaazratechnicalsupport]

Good sir

[@BonMj]

Thanks and welcome

[@manikandanmani646]

Hi Bro Good Job 👏

[@BonMj]

Thanks bro 🙏🙏🙏

[@josealduenda1186]

Excelente maestro, necesito de su ayuda tengo un problema con un sistema Daikin VRV IV al momento de encenderla la condensadora maestra arranca por unos segundos y marca el error U4-03 me podría ayudar con el significado de este codigo

[@BonMj]

Do you check other indoor unit?
1)may one or more the indoor unit power supply problem or pcb faulty.
2)may outdoor pcb problem.
3)or communication wire problem.

[@josealduenda1186]

@@BonMj como puedo identificar el evaporador que tiene el problema ?

[@josealduenda1186]

Ya probamos el cable de señal con continuidad y no tiene problemas o recomienda cambiarlo?

[@monojnath8446]

Hi boos

[@kudteb6]

Good

[@BonMj]

Thanks

[@jesonlauron8953]

Are you a Singaporean sir?

[@karaors8970]

Hi bon 🇹🇷🤳🛠️👍

[@BonMj]

Thanks

[@khaerulanam5581]

Hello master, i have daikin vrv-4 and get trouble UC..?
How to fix...?

[@BonMj]

May system controller address duplicate

[@user-mv1wf5pg9h]

Hi Bon, do you have FXMQ32PVE motorized valve and C4, C5 thermistor?

[@BonMj]

Dun have, sorry

[@user-mv1wf5pg9h]

@@BonMj it's ok, thanks

[@samhaazratechnicalsupport]

Sir please tell me how come singapore me please 🙏😘🇮🇳

[@johnnyroxannebautista2063]

I just want to ask, how long or seconds the BS3 button to press/hold to reset VRV4?

[@BonMj]

More than 5second

[@johnnyroxannebautista2063]

i watched the video from 1.56 to 2.02 during the reset and its more than 5 seconds
am i going to wait for the lights off for the reset sir Bon?

[@BonMj]

@@johnnyroxannebautista2063 yes..wait the 7 segment light off.

[@agusanwar107]

please MR .long Duration videos or Upload

[@lokeshlokeshkumar2107]

I request daikin dect model cfm calculation plz videos

[@user-sc3xi7mg5j]

Привет,класные и полезное видео,помогите устранить ошибку "UA" Daikin VRV 3

[@BonMj]

Check indoor and outdoor power supply.
Or wrong connect model

[@StarClub993]

How to slove error HJ-04

[@BonMj]

May thermal storage water level sensor

[@lesterrivera4154]

Hi sir bon.. may i ask you how many PSI in VRV 3 R410a in 3 unit indoor thanks

[@BonMj]

Difficult to say for the pressure in vrv system.
For new installation,need to calculate the pipe length and pipe size to add extra refrigerant.

[@lesterrivera4154]

@@BonMj sir 25 meters 3/8 liquid line and 5/3 suction. Its ok at 150 psi?

[@BonMj]

@@lesterrivera4154 5 hp?

[@lesterrivera4154]

@@BonMj12 hp (Daikin VRV 3 Heat pump) model RXYQ12PYLK.

[@BonMj]

@@lesterrivera4154 oic..

[@muhamadsani9801]

Hi Bon can solve my problem aircond split unit, inverter brand york is error code is been detect L5 ? But i done change pcb outdoor still same. Tq

[@BonMj]

Try check the compressor input voltage or ampere.

[@muhamadsani9801]

@@BonMj okey later i check this voltage . but how if i can get same result ?

[@BonMj]

@@muhamadsani9801 what you mean same result.
If voltage ok ,should the compressor got problem

[@muhamadsani9801]

@@BonMj yaa . Voltage is normal. Oh Compressor ? But i check quantinity is normal , all terminal compressor is okey. So how i can solve my problem tq.

[@BonMj]

@@muhamadsani9801 pcb output voltage ok?

[@hitmankingdom825]

E2-02 VRV AC ERROR CODE WHAT IS THE PROBLEM

[@hitmankingdom825]

I also change all pcb and sensor as well but machine is showing e2-02

[@BonMj]

@@hitmankingdom825 check high pressure sensor

[@TanveerAhmad-is4uc]

Please urgently help 4way cassette and 1 side cooling and 3other side air through and pcb changing and electronic expention valve change please which use settings for cooling remote number BRC1C62-9

[@BonMj]

I side cooling should insufficient gas to FCU.
How is the gas pressure

[@TanveerAhmad-is4uc]

@@BonMj back pressure 140 pai and discharge 450 psi

[@BonMj]

@@TanveerAhmad-is4uc model? Running amps?

[@TanveerAhmad-is4uc]

@@BonMj VRV X model no RXYQ20ARY6 17 ampere take 1 indoor only start.

[@BonMj]

@@TanveerAhmad-is4uc you only on 1fcu?

[@eduardovargasarancibia2628]

Hola por favor me ayuda tengo un sistema con el código Uf-01 pero en alguno termostatos me muestra u4-01, ya revise cableado y luz happ

[@BonMj]

UF try check the indoor unit thermistor

[@Mangashraf02]

Mis kalo PCB outdoor U4-01dan termostat indor u4 apa masalahnya ya🙏🏻