Hi my name is ***** ***** I will assist you today.
Though the unit is brand new, I would first start by emptying the condensed water tank, then suggest you check and clean all the filters, this is described on pages 40-46 of the manual.
Once this has been completed I would check their is sufficient air flow around the unit to make sure its not overheating (though it should give you a warning if it does overheat\not get enough air flow).
Then its a case of looking at the indicators on the display are there any indicators shown on the display other than which programme has been enabled?
I would suggest you look to enable a basic drying programme called "warm air", set it for 30 minutes, and see if the programme completes or it goes straight into cooling after a few minutes. If it does, this would suggest a sensor fault and I would based on the age of the unit look for them to do a swap out.
Please let me know how you get on