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Question About Nighthawk Carbon Monoxide Alarm KN-COPP-3
What does it mean when detector chirps and reads E...

What does it mean when detector chirps and reads EER. Press peak level button and it reads E09. Changed battery and hit reset and it won't reset

Asked by Robert Lilly on 04/16/2014 1  Answer

ManualsOnline posted an answer 10 years 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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