Service manual

Alarm sequence 1
B-5
B
LEDs and Relays,
2alarms
The following table shows the state of the front LEDs and alarm relays for two
alarms in different states.
Comments Condition 6 shows that if a second alarm occurs after you have pressed the receiving
attention button to the first fault the Receiving Attention LED turns off. This enables
you to acknowledge the new alarm by pressing the receiving attention button once
more.
Condition Front LEDs Alarm relays
A B Rec. Att A B C Rec. Att Clear
1Nofault
❍❍❍ ❍❍❍ ❍ ❍
2 First fault. Digital audio input loss
(B-alarm)
❍●❍❍●❍❍❍
3 You press the Receiving Attention
button
❍●● ❍❍❍ ● ❍
4 Fault clears after 3
❍❍● ❍❍❍ ● ●
5 You press the Receiving Attention
button after 4
❍❍❍ ❍❍❍ ❍ ❍
6 Second fault. Network input loss
(A-alarm) after 3
●● ❍ ● ❍ ❍ ● ❍
7 You press the Receiving Attention
button after 6
●●● ❍❍❍ ● ❍
8 First fault clears after 7
●❍● ❍❍❍ ● ❍
9 First fault clears after 6
●❍ ❍ ● ❍ ❍ ● ●
10 You press the Receiving Attention
button after 9
●❍● ❍❍❍ ● ❍
●
= active relay, LED lit,
❍
= inactive relay, LED not lit