First Alert FA2100C User Manual page 7

TYPICAL ALPHA KEYPAD
Fixed-Word Keypads are functionally similar, except for screen displays.
IMPORTANT!: When entering codes and commands, sequential key depressions must
be made within 2 secpnds of one another. If 2 seconds elapses without a key depression,
c
the entry is aborted and must be repeated from its beginning.
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