Nighthawk KN-COPP-3 Part Six Display Reading and What They Mean, Flashing dot Return to zero

Part Six – Display Reading and What They Mean

Page 6-3 and 6-4 contain vital information about the various readings you may see on your display. We suggest you keep this User’s Guide handy for reference.

Your new Nighthawk carbon monoxide alarm is a sophisticat- ed electronic device – yet very simple to understand. Basically, the unit will display a “0” if it does not sense carbon monox- ide and if you have a good 9V backup battery installed.

If it senses carbon monoxide, it will display a reading so you can see if you have a non-threatening or emergency situation.

However, if the backup battery is low or missing, or if the unit malfunctions it will display other readings (and alarm differ- ently) to alert you that something is wrong with the alarm.

Please familiarize yourself and other family members to the difference between a CO reading and a reading signifying a problem with the alarm itself.

Start-up and Normal Operation Readings

Display Shows	Alarm Sound	Unit Status	Recommended Action
Brief “888” and	One short “chirp”	Self checking when AC powered	None – Unit should quickly
flashing dot			return to zero.

“Lb” and dot flashes alternately with “0”.

(flashes alternately)

One short “chirp” Start-up or reset phase when every 15 seconds. AC powered and low battery

Install or Replace 9V battery Refer to page 1-4.

Steady “0”	None	Normal AC operation (sensing	None
and flashing dot		no CO) and with good battery
Steady display of	4 quick beeps,	High level of CO detected	Refer to page 4-1
high number (in the	5 seconds off,
hundreds of ppm)	repeat.
and flashing dot

If at any time you test the alarm and it does not perform as described, have it replaced immediately.

6-3