My house was built in 2006. The security panel says GE on the front. Inside the flap are 20 buttons, four rows by five columns. The first columns says "cancel, fire, medical, and police." The next three are the keypad. The last column says "Stay, chime, exit, and bypass." I need to change the password but do not know how to do that. I need a manual but do not know the model number. Could you advise either how to change password or of the model number? Thank you