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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, 11 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, 10 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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