Napco MA 850 / 854 Codes

Master Program Code (should be 123456, does not Arm or Disarm)
Secondary Codes (850 = 1 to 4, 900 = 1 to 8)
Duress Code 2 digit Code (usually 99) + User Code when disarming

If Master Program Code is not known customer cannot change codes

Add Codes 1. Hold 8 for 3 seconds (Keypad will beep)
2. Enter Master Program Code (Keypad beeps, flashes rapidly)
3. Press [S] key + User (850 = 1 to 4 900 = 1 to 8)
4. Enter New 1 to 4-digit User Code (Cannot have a 0 in any code!)
5. Press [S] twice to exit (Keypad stops beeping

Delete Codes 1. Hold 8 for 3 seconds (Keypad will beep)
2. Enter Master Program Code (Keypad beeps, flashes rapidly)
3. Press [S] + User to delete (850 = 1 to 4 900 = 1 to 8)
4. Press [S] twice to exit