1．
Slide the power supply unit cover on the upper part of the room side up to remove it.
2．
Remove one of the 4 AA batteries.
3．
Use a precision screwdriver or pen tip to change DIP switch 1 on the power supply unit.
①Auto lock: OFF
②Auto lock: ON
The switch is small, so be careful not to make a mistake.
4．
Press the Open/Close button three times.
5．
Reinsert the removed AA battery.
Be careful not to confuse the + and - polarities of the battery.
6．
Attach the battery cover.