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Ask To-Shay Your Own Question
To-Shay, Electronic Security Engineering
Category: Home Security Systems
Satisfied Customers: 34
Experience:  Long & Extensive experience in the Electronic Security Industry from Design, through to Installation & Ma
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The key pad started beeping and displayed 05 check. This

Customer Question

The key pad started beeping and displayed 05 check. This code is for smoke, however the smoke detectors were not sounding. There was not any smoke or fire in the house. The only way to silence the beeping was to press the bypass key. How can I fix this problem?
Submitted: 1 year ago.
Category: Home Security Systems
Expert:  Russell H. replied 1 year ago.

Hi, thank you for contacting My name is Russell. I will do my best to provide the right answer to your question.

What alarm system is showing the 05 Check code, please? by maker and model number.

Please let me know, by the Reply To Expert function, and I will advise you further.

Customer: replied 1 year ago.
The system is an ADEMCO which is about 20 years old and was in the house when from the previous owner
Expert:  Russell H. replied 1 year ago.

Do you have a code, user code, engineer code, or installer code, for the Ademco system in question?

Can you tell what the model # of the Ademco system is, please?

Customer: replied 1 year ago.
Try N5479V4 6/96
Customer: replied 1 year ago.
I found the problem was acid on one of the terminals of the backup battery
Expert:  Russell H. replied 1 year ago.

Once that was scrubbed Off, did the code clear, and the alarm stop?

If so, good!

If the case is complete, would you wish to rate my work and my answers?

Customer: replied 1 year ago.
The code cleared and the alarm stopped. That's all thanks
Expert:  Russell H. replied 1 year ago.

OK. Thank you for asking your question here at, and you're welcome.