Nautilus Hyosung MS500 Operator's Manual page 20

Chapter3. For the beginning operator
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3. When the combination has been correctly entered, the LCD will read "OPr" meaning
"Open right."
4. Turn the dial right (CW) until it stops. The lock's bolt is now retracted and the lock is
open.
5. Turn the handle to the left (CCW) and open the security door.
<Note!>
Fix the security door using the stopper in the picture below.
Operator Manual