Samsung RF197AB - Manual (Page 6)

Names and basic functions
If you want to make ice faster (controlling the Power Freeze)
Press the Power Freeze Button. (Refer to the picture.)
- The Power Freeze light on the display comes on (see the
arrow mark) and this function begins to operate regardless of
the set freezer temperature.
Press the Power Freeze Button again to cancel this function.
- The light goes off and it operates at the set freezer
temperature again.
- The Power Freeze function operates for 72 hours regardless of the set temperature.
If you want to speed up the cooling in the Fridge (Power Cool)
Press the Power Cool Button. (Refer to the picture.)
- The Power cool light on the display comes on (see the arrow
mark) and this function begins to operate regardless of the set
fridge temperature.
Press the Power Cool Button again to cancel this function.
- The light goes off and it operates at the set fridge temperature
again.
- The Power Cool function operates for 2 and a half hours regardless of the set temperature.