Changing Diakin 2 wire Thermostat to Google nest with C wire adapter

[F_Genius]

Hi

I live in a Condo and the central AC has a Daikin 2 wire controller which controls both the temperature as well as fans speed of the air conditioning unit. Rear of 2 wire Daikin ControllerFront of Daikin AC controller

I have added a C-wire adapter to provide power to the unit. I have connected the White Wire to R, the Black wire to Y and the power from the 24V adapter to the C connector. 

When I turn on the Nest thermostat to cool, nothing happens as the fan does not kick in. Can you please help on how to connect the  wires to the thermostat for it to work. I was thinking of putting a "jumper wire" between the Y and G on the nest thermostat?

Thanks 

[Patrick_Caezza]

@F_Genius 

From what I see, it is incompatible with any Nest thermostat, as it uses a proprietary interface.

[CoolingWizard]

Your Daikin uses a proprietary RS-485 interface to communicate with condenser and evaporator units.  This system is not compatible with a Nest Thermostat.  

AC Cooling Wizard

[F_Genius]

Hi,

Do you know if the Airzone adapter would solve the issue?

https://www.totalhomesupply.com/p/airzone-azai6wspda1-aidoo-pro-cloud-based-wifi-controller-for-daik...

Thanks 

[CoolingWizard]

I am not sure I have not worked with one of these.  Judging from the installation manual it appears to allow a smart thermostat to connect to using Rh Rc W Y G C wires. It has to be ordered based on your unit model to ensure its P1 and P2 interface and communicate with the HVAC equipment.  

AC Cooling Wizard 

[Jenelyn_O]

Hi folks,

I appreciate your help, @Patrick_Caezza and @CoolingWizard.

@F_Genius, thanks for reaching out. I'm sorry for the delay. I hope you get the answer you're looking for. You can visit this support article for additional information about the Nest Thermostat compatibility. 

Best,

Jenelyn

[Dan_A]

Hey there,

I wanted to follow up and see if you still need help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.

Best,

Dan

[Dan_A]

Hello again,

We haven't heard from you in a while so we'll be locking this thread if there is no update within 24 hours. If you need assistance or want to discuss topics, feel free to start a new thread.
 

Cheers,

Dan