What does code hierarchy mean?
A safe lock has different authorizations – similar to the hierarchy within a company. The authorizations are limited by which code type you have: There are codes to simply unlock the safe and codes for certain funtions which you need to change the safe lock’s settings. One of the most important function codes is the manager code. With it’s help the opening codes are activated or deleted.
Is there some kind of service code that only the manufacturer knows?
No! Such kind of a back door is absolutely forbidden for certificated safe locks. It would be too much of a security issue since someone could try to get that code.
However, we suggest that you create such a service code. Appart from a few exceptions, every electronical safe lock can have at least two opening codes. Activate a new code, write down the combination and hide the paper at a safe place – but not in the same safe of course. Even safer it is, to deposit that information online and anonymous. Many banks for example provide that function.
This way, in case you forget the manager code, you still have a code to at least open the safe.
Can I use a word instead of a number combination as a code?
Yes, but please be aware: The letters on the entry unit are only used for help, to make easier to remember the combination code. The safe lock still “thinks” that you enter numbers, the keypad does not work as the one used on mobile phones. So do not tap on the  thrice to enter a “D”.
Can I control all the codes as a manager?
Normally each user can and should decide on their own code. The manager provisionally determines only code numbers at the activation of a code. This safety function protects both, manager and user, in case of supsicion of manipulation. The audit makes it possible to recognize which code was used to open the safe lock – but it does not tell who entered the code. The one who knows someone else’s code normally can bare shake off suspicion.