Who can help: SG 115 rev. 2 beeps

Hi,

I switched on a brand new SG 115 rev. 2.

The manual says: "Once the security system has booted completely, you'll hear an acoustic signal: five beeps in a row."

My SG 115 rev. 2 don't beep any time.

Has the SG 115 rev. 2 a buzzer and could it broken?

Who can confirm "no beeps" or "five beeps" after boot?

Thanks.

Many Greetings

Felix