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Question About Nighthawk Carbon Monoxide Alarm KN-COPP-3
What does Err code with a beep mean? Changed the b...

What does Err code with a beep mean? Changed the battery but still showing code & beeping.

Asked by Mary on 11/01/2012 2  Answers

ManualsOnline posted an answer 11 years, 5 months ago

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

Bob posted an answer 11 years, 4 months ago

4 Unit continually beeps every 30 seconds. Changed battery, push reset, disconnectedpower but nothing works. Window err then 888 then back to err till I push the button. What next?
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