The default master code is 1234. The maximum code length is 6 digits. The master code must be CHANGED for security reasons, because the default one is written in Lokus’s manual and with it, anybody can set himself his own code, to open YOUR door. Procedure: -insert default master code 1234 and press the Enter key -insert 0 and press the Enter key (0 is function - Change master code) -insert new master code and press the Enter key -insert new master code and press the Enter key (confirmation of new master code) -if it is successful, the Lokus will confirm it with two beeps