controller grammatic 2502 password

[Jakub]

Hello, I have a problem with the password to the driver grammatic 2502. technician changed the password the previous owner of the compressor and I can not get it back. How to restore the factory default password? what is the default password? cos apparently the driver of the year of manufacture? We urgently need your help .. jakub-pietrzak@wp.pl

[Jakub]

Perhaps there is sth like universal password like in unisab? Is it four or more signs in this password? please help me....