samsung floorstand split ac problem

hi
i installed a Samsung floor stand split unit
its heat pump
28000 btu
and model is AP30N1A
the unit is working perfectly
as i use it in cooling mode
its normally that after the desired temp is reached
the outdoor unit is turnoff and indoor unit keep running
but
the problem here
when the desired temp reached
the outdoor unit turn off and indoor unit shutdown then its turn on after 2 second
and when the room temp equal the set temp
the outdoor unit run
so why the indoor unit turn off then turn on
what is the problem
this happen every time
and the unit cools very excellent