Siemens K44 用户手册

To open the lock, a 4-digit (or 6-digit) code should be 
entered on the code lock’s keypad.
K44 Duo is blocked if a visitor performs 12 keypress-
es without finding the correct code. To release the 
blockage, enter a correct code twice in succession.

To unlock the door permanently, proceed as follows:

Press B.
Enter the entrance code.
Enter 1.

The door is now unlocked (green LED is lit). To lock 
the door, follow the above steps, only enter 0 in step 
3 instead. 

1�
2�
3�