If users other than User 1 (Master code) forget their codes, go to Program Menu 5 to delete the user number and add the user again. Program Menu is accessed by entering user 1 code and pressing 9.
If the Master Code (for User 1) is lost, the Engineer can get into program Menu by Pressing F+0, then Engineer code, and then 9 for Program menu.
Then press 5 for User Codes and 2 to erase User 1 and add the user again.
