Need help. how to enter guarded access on a sb200 thermo king unit to clear out code

need help . how to enter guarded access on sb 200 thermo king unit

If it's a smart reefer two controller,press menu unt alarms appear then hold the blank button and the exit button at the same time then scroll to date and time again press the blank and exit buttons at the same time and you should be in guarded scroll to which parameter you want.