Vista-10SE can have Master Code changed by user
Vista-10 cannot, Master Code is in location *20
Master Code User 2 (Old Vista-10’s (v6 and below) = User 1, only changed by downloading or location 20 in programming)
Secondary Codes User 3 to 6 (Old Vista-10’s (v6 and below) use 2 to 7)
Duress Code User 8 (Old Vista-10’s (v6 and below) = 1 digit above code, if code is 1234 Duress is 1235)

You cannot pause more than 2 seconds while entering below commands or it won’t work
Add Master Installer Code + 8 + 2 + New Master Code (Keypad should beep)
(If this does not work panel is older version, Master Code is in location *20)

Change Master Master Code + 8 + 2 + New Master Code twice (Keypad should beep)
(If this does not work panel is older version, Master Code is in location *20)

Add Code Master Code + 8 + User (3 to 6) + New Code (Keypad should beep)
(Old Vista-10’s (v6 and below) have Users 2 to 7)

Erase Code Master Code + 8 + User (3 to 6) wait 5 seconds (Keypad should beep)
(Old Vista-10’s (v6 and below) have Users 2 to 7)

After above commands keypad should beep indicating successful, if not try again