Press the "*" asterisk button on the front of the alarm. Tap ">" until "Access Codes" appears on the LCD display.
Press "5." "Enter Master Access Codes" appears.
Type your existing master code. The display shows "User Code 40P." 40P is the master code.
Press "*" asterisk. "Enter New Code" appears.
Type a new four-digit master code using the number buttons. The keypad beeps four times confirming the new code.
Press "#" to exit code programming mode. The new master code applies immediately.
Press the "*" asterisk button on the front of the alarm. Tap ">" until "Access Codes" appears on the LCD display.
Press "*" (asterisk.) "Enter Master Access Codes" appears.
Enter the existing four digit master code. "User Code 01P" appears on the screen.
Tap ">" until the number of the access code appears on the LCD display. Access codes each have a two digit code, e.g. "10." Press "*" (asterisk.) A "P" appears next to assigned code numbers.
Enter a new four-digit code for the user. The control panel beeps three times, confirming the new code.
Press "#" to exit code programming mode. The new user code applies immediately.