im having problem with my air cond sharp AH-X9MEV 1HP inverter.

install in my bedroom. i dont know what is my master bedroom size. but it's seems not cool enough even i set it to 16 degree.

Just having it install yesterday. cooper is about more than 10ft. But person installing my air cond said no need to add gas.

my question is . is it enough for my aircond gas inside for more than 10 ft? or is my room to big for 1HP aircond.

3600mm x 4575mm height about 10.5 ft