Nighthawk KN-COEG-3 User Manual page 22

Part Six – Display Reading and What They Mean
Readings You May See When Unit is AC Powered
Display Shows
Steady "Err"
and flashing dot
Readings You May See When Unit is on Temporary Battery Backup
Display Shows
Flashing dot
Steady "Err"
and flashing dot
Flashing dot
No display
If at any time you test the alarm and it does not perform as described, have it replaced immediately.
Alarm Sound Unit Status
"Chirp" every Unit malfunctioning when
30 seconds AC powered
Alarm Sound Unit Status
None Normal battery-only operation –
unit will show reading only if it
senses CO or gas
"Chirp" every Unit malfunctioning when
30 seconds battery powered
"Chirp" every Very low battery –
30 seconds unit will not respond to CO
or gas
Constant Alarm Near dead battery or
unit malfunction
6-4
Recommended Action
Call KIDDE Safety customer
service at 1-800-880-6788
Recommended Action
Plug in to AC as soon as
possible to conserve battery
Call KIDDE Safety customer
service at 1-800-880-6788
Replace battery
Refer to Step 3 on page ii.
Replace battery –
If this does not fix condition,
Call KIDDE Safety customer
service at 1-800-880-6788