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Does your inside fan run?
There should be an internal fuse on the control board and you may have blown that trying to install the link adapter. You would have to take it all apart to check that though.
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You can try to unplug the unit...HOLD DOWN THE POWER button while plugging it back in and see if that changes anything.
OK then you would have to take the unit apart to check the control board, if it is new I would suggest returning it.