First Alert FA1670C User Manual page 12

Functions of the Keypad (cont'd)
IMPORTANT! When using the keypad to enter codes and commands,
sequential key depressions must be made within 3 seconds of one
another. If 3 seconds elapse without a key depression, the entry is
aborted and must be repeated from its beginning.
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A
ARMED
B
READY
C
D
R
Burglary Keypad FA570KP
1 2 3
OFF AWAY STAY
4 5
6
MAX TEST BYPASS
7 8 9
INSTANT
CODE CHIME
0
READY
FA570KP-001-V0