Got Faikin working on FTX12NMVJUA with direct connection on S403

[Jerther]

Not really an issue or a feature request, I just wanted to put out there that I've got Faikin working on my head unit!

Daikin hardware FTX12NMVJUA Direct connection on S403 using:

Faikin - S403
GND    - GND pin 6 or 7
12v    - +14v pin 1 (BOTTOM)
48(TX) - RX pin 5
34(RX) - TX pin 4
5v     - Not Used

This has already been said but, to anyone who would like to do the same: WATCHOUT FOR PIN 10 (TOP) WHICH HAS 320V ON IT! DON'T TOUCH IT OR CONNECT AYTHING TO IT! And abviously, don't wire anything while the unit is powered!

I've then put the Faikin module in the small compartment at the bottom that is not covered by the metal shield.

Works a treat! WAY better than my attempt at an IR module that mimics the IR remote control ;)

[revk]

Thank you.

[Sytten]

Nice I have a FTX12NMVJU (not A?) and I was just wondering if it was compatible. Ideally I would to make a cable with a plug, is it a standard one?

EDIT: The issue https://github.com/revk/ESP32-Faikin/issues/134#issuecomment-1793641584 seems to suggest a JST could work, the connector can vary model to model it seems. I am not expert in connectors so any help / digikey part is appreciated.

[Jerther]

I'd like to help you with the cable but as you can see I hacked something. The pins on the Faikin are standard pitch so I just used a strip of dupont connector, but on the other end I used some old motherboard connectors for front panel leds and buttons. I removed the metal connectors from the plastic housing and crimpted them a little bit. It makes a surprisingly secure connection.

Best of luck :)

[Sytten]

I got a better view of of the board. I am still looking for a compatible connector.

[eskey0]

@Sytten I just setted up my faikins, I was successful with "2.5mm Pitch 6-pin Cable Matching Pair - JST XH Compatible" I had around, It's a thight fit, it even bend the plastic a little bit, but Iam 100% satisfied with the result.

A picture of the finished product

[hAMMERlized]

@Sytten I just setted up my faikins, I was successful with "2.5mm Pitch 6-pin Cable Matching Pair - JST XH Compatible" I had around, It's a thight fit, it even bend the plastic a little bit, but Iam 100% satisfied with the result.

A picture of the finished product

@eskey0

Nice one. But I don't get your wiring. Why do you have 6 wires instead of 5 at the connector? And where is the white and black cable going to? As well as the green one. As I can see there is a light and dark green one?

[eskey0]

@Sytten I just setted up my faikins, I was successful with "2.5mm Pitch 6-pin Cable Matching Pair - JST XH Compatible" I had around, It's a thight fit, it even bend the plastic a little bit, but Iam 100% satisfied with the result. A picture of the finished product

@eskey0

Nice one. But I don't get your wiring. Why do you have 6 wires instead of 5 at the connector? And where is the white and black cable going to? As well as the green one. As I can see there is a light and dark green one?

Thanks! The color of the wires don't match, I had both the connectors with their pigtails (I don't have the tools to make any of them) so they are soldered behind the faikin. The connector has 6 pins because you have to reach pin 6th for the ground, the unused ones are not connected, just routed behind the faikin and hidden there.

I hope I managed to explain myself, if you want I can dissasembly the unit and make some more pictures.

[hAMMERlized]

@eskey0 Thanks for the quick response. I think I got what you mean but I guess some detailed pictures can't be wrong 😉. And maybe some kind of quick written "diagram" like @Jerther did at the beginning of the topic. Just to be sure which pin is used and connected to the faikin board. Thanks.

[fischan]

@eskey0 which Indoor Unit do you have is this an ATXD Siesta Unit? Looks very similar to mine ATXD35A5V1B. Thanks!

[eskey0]

@eskey0 which Indoor Unit do you have is this an ATXD Siesta Unit? Looks very similar to mine ATXD35A5V1B. Thanks!

They are comfora, the exact model is FTXP35N5V1B, but maybe they share the board.

[hAMMERlized]

Hey @eskey0 ,

how about the detailed pictures and / or wiring diagram that you wanted to upload? :)

Thanks

[eskey0]

Hey @eskey0 ,

how about the detailed pictures and / or wiring diagram that you wanted to upload? :)

Thanks

I have to dissasembly the unit, I will upload as soon as I can, but I got my pinout from Jerther, in the first post you have all the info.

[JerreV]

Hello,

I don't know if this might help but the S403 connector seems to be a JST XA series one. Link to Header Link to Connector Crimps that go with the connector You can also get pre-crimped cables of different lengths: 20cm , 15cm , 30cm

[hAMMERlized]

Ok, so I have managed it to get it work with the following cable. Be aware to cut the 2 plastic "noses" with a sharp knife. Then the cable fits pretty well.

For connecting the 6 Pin Cable with the Jumper Cables of the Faikin module I have used this. So no soldering and crimping is needed.

Finally some hot glue to keep the cables where I want them to be and that's it. I have attached some detailed pictures. I have used Pin 1,4,5 and 6 from the connector.

Best Regards

[Jerther]

Any of you who got the Faikin module working on S403 have random WiFi connectivity issues? I have the module working since my original post, but once in a while the wifi would dicsonnect and reconnect after many minutes. I wonder if it may be caused by the Vcc line on the S403 port not providing enough power?

[fischan]

Any of you who got the Faikin module working on S403 have random WiFi connectivity issues? I have the module working since my original post, but once in a while the wifi would dicsonnect and reconnect after many minutes. I wonder if it may be caused by the Vcc line on the S403 port not providing enough power?

I remember two times where I could not reach the web UI, this happened always after changing settings, but not sure if related to power supply. Also did not check if Faikin was still connected to Wifi.

Next time I will check.

[adude00]

@hAMMERlized do I understand correctly that you're using the S403 connector that was originally meant for wired remote control?

I'm asking because in mine the cloud only wifi BRP069C47 connects to the S430 connector.

[hAMMERlized]

@hAMMERlized do I understand correctly that you're using the S403 connector that was originally meant for wired remote control?

I'm asking because in mine the cloud only wifi BRP069C47 connects to the S430 connector.

Yes

[adude00]

Following @hAMMERlized example I made an S403-Faikin cable, thanks to a set of pre-crimped jst connectors I found on Amazon.

The split is a Siesta series, model ATXF25E (with ARXF25E outside unit, but it shouldn't matter).

The cable:

Faikin side:

S403 (Daikin) side:

Note that I did trim both connectors as per @hAMMERlized example above.

Connected to Faikin:

Faikin details:

Before (original WiFi module only):

Test run:

Tucked in:

Shield installed:

Note that I did NOT touch the original BRP069C47 WiFi module. This is a feature for me so Alexa integration does not rely on my home automation (also, I paid for the damn thing so I might as well use it).

[dodgeboy]

I have the same Daikin model and i just got mine connected via the S403 yesterday. I'm having trouble controlling the fan speed. It auto detected 5 fan speeds + night mode. However, night mode does not work. Are you able to use night mode with your Faikin?

[revk]

Night mode should work, but may not report back as night mode. This is a basic issue with the S21 messaging. There are a few options to change how it is handled.

[dodgeboy]

In my case, when I click night mode it does not slow down the fan and after 5-10 seconds the highlighted button switches back to the fan speed it was at. In advanced settings, if I enable the option to always use night in auto mode, it doesn’t slow the fan down either. So I believe it’s something about my unit that doesn’t understand the command for night mode.

I should leave the fan steps setting at 0, right? I tried setting it to 3, 5, 6 and 9 as an experiment and it only made things worse by just giving me low, med, high speed buttons.

I didn’t mean for this to turn into a project for you. I mainly just wanted to see if others with the same unit were having the same problem and determine if maybe I missed a setting or something. I appreciate your response!

[revk]

Ok maybe it does not so night mode? Strange.

There are options to debug the messaging and even send messages, using MQTT.

If you work out how to do it, then I can update code.

[dodgeboy]

Great! I’ll work on that and report back with my findings. Thanks again!

[fortellerq]

Here's a pic of my aircon unit: Daikin Sensira FTXF35E5V1B. Very basic unit as it does not have a lot of features, but Faikin gets the job done nicely. Thanks a lot for people who provided their feedback in this thread - I've bought and used the same connector as people above.

https://imgur.com/a/E5eSFn0

[Sytten]

Its better to add images directly in github @fortellerq, third party image hoster always break after a few years

[fortellerq]

Thank you @Sytten for uploading the image for me. I had some trouble uploading it to GitHub and that's why I uploaded it to 3rd party host.

[hedgepigdaniel]

Just to add my experience to the mix, I've set up Faikins on CTXM25RVMA, CTXM35RVMA, CTXM60RVMA. These are all part of the Australian Super Multi NX line of multi split Cora indoor units.

Units	Experience	Pictures
CT(K/X)M(20/25/35/42)RVMA	According to the brochure, these all accept a BRP072C42 Wifi adapter via a BRP067A42 "Remote control PC board set", so I assume they are all equivalent. My CTXM25RVMA and CTXM35RVMA both have an S403 header accepting a XAP-10V-1 plug.
CT(K/X)M(50/60/71)RVMA	According to the brochure, these all accept the same BRP072C42 Wifi adapter but via a different BRP980B42 "Remote control PC board set". Again, I assume these are all equivalent. My CTXM60RVMA has an S403 connector that looks like the one in this post. I also used a JST PAP-10V-S and trimmed off the retainer and clips. The pins are connected in the same order as the XAP-10V-1 connector in the smaller units.
CT(K/X)M(85/95)RVMA	According to the brochure, these accept a BRP072C42 with no adapter. My best guess is that they have an S21 connector.

In all cases, I wrapped the Faikin in some heat shrink and left it resting inside the steel shielding around the high voltage circuits, because it doesn't seem like the S403 is safely isolated from high voltage. None of my units are very far from the WiFi router, but they work perfectly - no dropouts or anything.

[deadhurricane]

@hedgepigdaniel I'm going to be attempting this shortly on the 2x Single Cora units, it looks like the internal units should be identical. I'll report back once completed.

2 questions for you:

• How did you source the Faikin board? Amazon direct to Australia, Amazon forwarding via UK or PCB Manufacture?
• Do you have a link to the crimps you used on both sides? I can see JST-XH vs JST-XA in previous comments

[hedgepigdaniel]

I bought the Faikins from Amazon which (at the time) was shipping them to Australia.

I bought pre-crimped cables from Digikey. You can find them in the "Associated Product" section, or by referring to the datasheets.

ASXASXA22K203 for the XAP-10V and APAPA22K254 for the PAP-10V-S.