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E89 Y2 wire without Y1

dhavalparekh
Community Member

I got E89 error (Y2 wire without Y1) while doing the set up. I did not have Y1 wire in my old set up (pic attached)

Also, I see blurred center ring in display. (photo attached)

I went past the error to set up in pro mode, and now I do not see cool mode.  The picture for new config attached.

Please advice.

New Set up via pro set upNew Set up via pro set upOld Set upOld Set upblurred displayblurred display

7 REPLIES 7

Markjosephp
Community Specialist
Community Specialist

Hello dhavalparekh,

 

Thank you for taking the time to let us know about your inquiry. I'd be happy to take a look into this for you.

 

Your system doesn't have second-stage cooling, so you should connect the yellow wire to the Y1 terminal and check that all wires are properly connected and that all tabs are pushed down. Also, please restart the thermostat after the wiring changes by pressing and holding the screen for 10 seconds until it shuts down to refresh, and keep me posted if the screen is still blurry.

 

Regards,

Mark

dhavalparekh
Community Member

Thank you for the response. I will disconnect the Y2 and connect to Y1, and report back if that fixed the problem.

Jake
Community Specialist
Community Specialist

Hey there,

 

I wanted to check in and see if you are still in need of any help. Were you able to resolve the issue? Please let me know, as I would be happy to assist, and answer any questions you may have.

Best regards,
Jake

I plan to redo the wiring tomorrow and will let you know if that worked. Appreciated the follow up.

I re-did the wiring to change from Y2 to Y1.

I was able to see the cool option, but now it keeps complaining with E73  Wiring Error. No power to Rc wire detected.  I confirmed wire is connected tight (Removed and put back on as well) to Rc. Picture attached.

Please advice.

WhatsApp Image 2023-01-22 at 5.34.26 PM.jpeg

WhatsApp Image 2023-01-22 at 5.36.23 PM.jpeg

Hi folks,

 

Thanks for assisting, Jake.

 

It's me again, @dhavalparekh. I appreciate you taking the steps. It appears that your thermostat isn't getting any power, which shows in the wiring report. Let's sort this out.

 

  1. Check the power readouts under "Technical Info."
    1. It should be at least 20-30V in Voc and Vin, then 200mAh on Lin.
  2. If the power readouts are below the requirements,
    1. Remove the C wire and leave it disconnected.
  3. Restart your thermostat to refresh.

 

Note: turn off the power from your HVAC system at the breaker box before touching the wires.

 

Please keep me posted on how it goes.

 

Regards,

Mark