Original Maintenance Advisory:
Customers can hear a recording of a “triple-chirp” alert on this website, and find some FAQ.
Original FDA Advisory on the FDA website:
When sending this link to customers, we suggest you highlight the sentence that explains that you should contact Philips only for devices that have issued a series of triple-chirps. “If your Philips HeartStart AED has ever emitted or begins to emit a pattern of triple chirps, please contact Philips Healthcare immediately…”
Philips statement regarding the matter:
In this statement, we reiterate that customers should contact Philips in the event they hear an audible triple-chirp from their FRx or HS1 device.