DSC保安系统显示正常, 但开关门窗没有声音提示, 请问是什么原因?

以前有声音吗？
2楼是指这个：
Press and hold the CHIME key for 3 seconds to turn on the door minder function. If a zone which
has an entry delay is entered, the keypad will beep to let you know someone is in the area. Press
and hold the CHIME key again to turn this feature OFF.

TROUBLE LED
Your alarm is always self-checking, looking for problems. If any are detected the trouble LED will
light, and the keypad may beep.
Press any key to stop the beeping.
If you want to know what is wrong with your alarm press * then 2. The zone LEDS will light to tell
you what the trouble is :

1 = Service Required
2 = Loss of AC Power
3 = Telephone Line is cut
4 = Communications failure
5 = Sensor or zone fault
6 = Sensor or zone tamper
7 = Sensor low battery
8 = Loss of time and date