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7. Maintenance
NOTE: This unit is sealed. The cover is not removable.
Due to the loudness of the alarm, we suggest that you place your
fingers over the sounder opening while testing your alarm.
CAUTION: Continuous exposure to the high sound level of this
alarm over an extended period of time may cause hearing loss.
Testing
To test the CO alarm, press and release the Test/Reset button, you will
hear 4 quick beeps – followed by 5 seconds of silence – followed by 4
quick beeps. Notice the red Alarm LED flashes when the unit alarms. The
alarm will then return to monitoring for carbon monoxide.
Battery Replacement
WARNING: If at any time you test the alarm and it does not
perform as described, have it replaced immediately.
NOTE: This CO alarm is not battery operated. However, this alarm is
equipped with 2 AA batteries backup – the 2 AA batteries are to supply
short term back-up during a power outage.
If installed, slide the battery door in the direction of the arrows to
release it. Remove the batteries and replace with two of the following
approved replacement Alkaline batteries:
• Energizer E91 • Duracell MN1500, MX1500
• Gold Peak 15A • Golden Power GLR6A
Replace the battery door.
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Error/ serv-
ice alarm
Red LED flashes every
30 seconds
One quick beep
every 30 seconds
Unit is in error condition
Error Red LED
constantly on
Constant alarm Very low batteries or
unit malfunction
Replace batteries.
If “Err” continues, unit
has malfunctioned.
Replace immediately. Unit
will not respond CO
Normal
Test/Reset
function
Red LED flashes with
beeps.
4 quick beeps,
5 seconds silence,
repeated once
Normal operation when
Test/Reset button is
pressed
CO not detected. Alarm
for test purposes only
Operating and Alarm Characteristics
F
unction LED Display Alarm Sound Unit Status Recommendation
Event
Memory
Green LED
flashes every
10 seconds
None 100ppm or more
CO previously
detected
Push button to clear
and test unit.
Tamper
Resist
Red LED
constantly on
Constant
alarm (after
2 minutes)
Tamper resist
feature
activated
Plug unit into AC outlet.
Disable feature if desired.
(See Section 2)
End of
Unit Life
Indicator
Red LED flashes
two times every
30 seconds
Two quick
beeps every
30 seconds
End of unit life Replace unit immediately.
Unit will not
respond to CO.
2546-7201-01(KN-COB-DP2).qxd:_ 2021.7.16 11:23 AM Page 14
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