How to Reset the ADT Alarm PC 1555 Code

Reset The Master Code

• 1

  Press the "*" asterisk button on the front of the alarm. Tap ">" until "Access Codes" appears on the LCD display.

• 2

  Press "5." "Enter Master Access Codes" appears.

• 3

  Type your existing master code. The display shows "User Code 40P." 40P is the master code.

• 4

  Press "*" asterisk. "Enter New Code" appears.

• 5

  Type a new four-digit master code using the number buttons. The keypad beeps four times confirming the new code.

• 6

  Press "#" to exit code programming mode. The new master code applies immediately.

Reset A User Code

• 7

  Press the "*" asterisk button on the front of the alarm. Tap ">" until "Access Codes" appears on the LCD display.

• 8

  Press "*" (asterisk.) "Enter Master Access Codes" appears.

• 9

  Enter the existing four digit master code. "User Code 01P" appears on the screen.

• 10

  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.

• 11

  Enter a new four-digit code for the user. The control panel beeps three times, confirming the new code.

• 12

  Press "#" to exit code programming mode. The new user code applies immediately.