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my name is Billy.
It appears you have a fault that is switching over to fan only out of a default setting. In other words lets say the coil "thinks" it is freezing....either a bad sensor, low on refrigerant etc....and it stops cooling operation and defaults to fan only.
As new as this unit is I would not attempt sensor test or replace on your own as it could void warranty. I would call the installing contractor and have checked out under warranty.
You are very welcome.
Wish it was easier or a secret reset...but these are more complicated than they look.
I wish you the best