Hisense FV21C7HWE User's Operation Manual page 11

refrigerator temperature setting will
revert back to the previous setting.
 Super Cool will automatically turn
off after 6 hours.
9. Demo mode
Demo mode is for store display and it
prevents the refrigerator from
generating cool air. In this of Cooling off
Mode, the refrigerator may seem like it
is working but it will not make cool air.
10
The display panel will show special
segments as follow.
Press and hold the "POWER" and
"MODE" buttons at the same time for 3
seconds to turn off the demo mode and
the buzzer gave a long sound.
●