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Question About Nighthawk Carbon Monoxide Alarm KN-COPP-3
I have had......

...the KN-COPP-3 unit for several years. When the batteries become low, the unit beeps a warning so that's when I put in a new 9V battery. This time the unit beeps but the readout shows Err. I replaced the battery with a new one and the unit beeps and still shows Err in the readout. I need to find out if the unit is no longer functioning or if something else is wrong.

Asked by on 01/30/2010 5  Answers

ManualsOnline posted an answer 14 years, 8 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

Elizabeth Neubert posted an answer 14 years, 8 months ago

0 Same as above - have had for a few years - put new battery in and the unit beeps and still shows Err in readout. What is wrong or what else can I do?
Was this answer helpful?

Elizabeth Neubert posted an answer 14 years, 8 months ago

0 Same as above - have had for a few years - put new battery in and the unit beeps and still shows Err in readout. What is wrong or what else can I do?
Was this answer helpful?

Elizabeth Neubert posted an answer 14 years, 8 months ago

0 Same as above - have had for a few years - put new battery in and the unit beeps and still shows Err in readout. What is wrong or what else can I do?
Was this answer helpful?

Elizabeth Neubert posted an answer 14 years, 8 months ago

0 Same as above - have had for a few years - put new battery in and the unit beeps and still shows Err in readout. What is wrong or what else can I do?
Was this answer helpful?

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