Call for service and see what they say, instead of relying on forum. Could be installation issue for all you know.

If it was mishandled during installation, there is possibility of damage as well. Anyways its good to call the service centre and see what they have to say. After that, if still not satisfied can always go to consumer tribunal to request for full refund

Someone just commented above that they are using the triangle version Samsung AC and its quiet. How long ago did you Samsung?

Why is calling the service centre for something under warranty is such a difficult thing to do? First we eliminate the causes before arriving to the fact that it is design failure. I am not supporting Samsung but just giving benefit of doubt that's all

I am not here to argue, but let TS call and see what the service centre says. I even had Japanese brand fail on me during warranty, this things are sometimes based on luck. If you feel that Samsung is not good enough for you, just stay away from it but in this case the issue is to see how to resolve TS problem. Unless you want to buy for TS a Japanese brand AC to replace the Samsung:P