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Question About Nighthawk Carbon Monoxide Alarm KN-COPP-3
I replaced the battery, plugged the unit in and I ...

I replaced the battery, plugged the unit in and I am receiving an Err message and a beep in about 30 second intervals. Is the unit defective. There is no work around or mention of this condition in the manual.

Asked by Jim on 12/30/2014 1  Answer

ManualsOnline posted an answer 9 years, 9 months ago

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

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