OK. If you're sure your Merak is new - if you're sure the console is connected correctly and otherwise it is well-assembled - then you have (and it's a shame for sure) gotten a defective product. It will have to be
A. complained about (or, you should promptly notify) to the seller, and
B. disassembled and packed up again, unless the seller provides in-home servicing! and then
C. returned to the seller or vendor, for a refund or for an exchange for another, fully working, treadmill of equal or equivalent value and capabilities/features.
I regret coming to this conclusion... but given the conditions, it's the only and the best thing to do with the situation. (A brief double-check that all is OK with the assembling, might be justified - but if you're sure of those details, then notifying/packing-up/returning it, is the right thing to do.)
Let me know if you need more help. Or if this answers your question.