They change the color balance (temperature) settings on the set, cool leans more to blue/green, warm leans more to red/yellow (laymans view).
Enjoy the set...
JohnPM
Unregistered guest
Posted on
If you are curious about the corresponding color temps, the CIE chromaticity coordinates for those modes in the set's service menu correspond to the following:
Cool2 12750K Cool1 11200K Normal 9700K Warm1 8500K Warm2 7200K