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Premium Chamberlain garage access systems feature an internal battery backup that will operate the opener in case of a power outage. The garage door opener will emit a beeping sound when it is operating off of battery power or when the battery is no longer able to recharge. needs a battery.
Hope this helps.
Our garage door opener has a safety beam across the floor which prevents the door from closing on objects which are sitting there. This safety feature also makes an annoying beeping sound each time the beam is crossed. This tutorial will show you how to disable the beep, but still keep beam functional. https://www.youtube.com/watch?v=Cn_vGe_7_x4
Garage Door Opener Unit is usually connected to main power supply. I don't know if it has any battery. Try changing the battery in your hand held unit.
The only thing on a chamberlain garage door opener that can beep is the battery back up unit. It beeps if it is being used or if it has lost it's charge or if it has lost the power to be charged. There is also an led light that will give you information on the status up by the battery too. These will be in your manual to decipher. You can get a new battery at chamberlain.com Thanks BB
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