13 14121110
Function LED Display Alarm Sound Unit Status Recommendation
Operation
Normal
operation
Green LED constantly on None Normal AC operation
(sensing no CO) and
with a good battery
None
Normal
operation
Green LED flashes every
7 seconds
None Normal DC operation
on 9V battery backup
Verify AC power is
restored as soon as
possible to conserve
battery. Replace battery
Carbon
monoxide
alarm
Red LED flashes with
beeps. Amber LED shows
initiating alarm
4 quick beeps,
5 seconds silence,
repeating
Alarm condition.
Dangerous
concentrations of CO
detected
Refer to alarm
procedure on
Page 17
Smoke / fire
alarm
Red LED flashes with
beeps.
3 long beeps,
1 second silence,
repeating
Receiving signal from
an interconnected
smoke alarm detecting
smoke
Evacuate by your
escape plan
Red LED flashes every
15 seconds
One short “chirp”
every 15 seconds
AC powered and low or
missing battery
Install or replace 9V
battery. Refer to
Page 14
Red LED flashes every
30 seconds
One short “chirp”
every 30 seconds
Unit malfunction Call Kidde
Customer Service
Low battery
Error / service
alarm
WARNING: IF AT ANY TIME YOU TEST THE ALARM AND IT DOES NOT PERFORM AS DISCRIBED,
HAVE IT REPLACED IMMEDIATELY.
NOTE: REFERENCE TO BATTERY BACKUP OPERATION IS ONLY APPLICABLE TO UNITS THAT
ARE EQUIPPED WITH BATTERY BACKUP OPTION.
Red LED constantly on Constant alarm Very low battery or unit
malfunction. Unit will
not respond to CO
Replace 9V battery. If
condition continues,
call Kidde Customer
Service
Red LED flashes with
beeps. Green and amber
LED’s on
4 quick beeps,
5 seconds silence,
repeated once
Normal operation
when Test/Reset button
is pressed
CO not detected.
Alarm for test
purposes only
Error
Normal
Test/Reset
function