I think I found it on the Samsung website. Apparently there is no "off" all you can do is put the fridge in demo mode which turns off the cooling but lets the interior lights still work.
Link"Have a long trip planned and an empty refrigerator? Don't want the hassle of having to unplug your fridge? Turn on Cooling Off mode (aka Demo mode) on your refrigerator. This disables the cooling system in your refrigerator, freezer, and ice maker. This will save energy when you're away on your trip.
Caution: This mode is not for storing food. Any food stored in the refrigerator will spoil if Cooling Off mode is left on for an extended period.
Turn Cooling Off mode on or off on your refrigerator
Whether you want to enable or disable Cooling Off (Demo), the steps are the same. When Cooling Off mode is on, the panel will display "OF OF" or "O FF."The buttons for activating Cooling Off mode will be labeled differently depending on which Samsung refrigerator you have, but the location of the buttons is always the same.
Touch and hold Button 1 and Button 2 at the same time until you hear a chime.
Refrigerator panel showing the step to turn on Cooling mode.
If you are disabling Cooling Off mode, "O FF" (or "OF OF") will disappear in a few seconds, and your fridge will start cooling again. On the other hand, if you're turning the feature on, "O FF" (or "OF OF") will appear, and the fridge compartments will stop cooling. If the display does not change, continue to the next step.
Touch and hold Button 1, Button 2, and Button 4 at the same time until you hear a chime.
Refrigerator panel showing the step to turn off Cooling mode.
"O FF" (or "OF OF") will disappear in a few seconds if you are turning the feature off, and your fridge will start cooling again. If you are turning the feature on, "O FF" (or "OF OF") will appear, and the fridge compartments will stop cooling.
Note: These steps cover the most common models. Since the steps for turn Cooling Off mode on or off are the same, you can see our troubleshooting article for steps for additional models."