Specifications

5
LSI-16 FRONT PANEL
(LED 7) System Fault (continued)
Because it indicates a potentially serious condition, the presence of a System Fault extinguishes indicators for PSU, Path and Protection
faults so as to focus attention on the primary fault. However, individual PSU, Path and Protection faults are still shown in the system
software and signaled to individual fault outputs as described below.
The LSI-16 will always power up in the system fault condition. Manual intervention is required to take the LSI-16 out of this condition. Note:
this power up condition does not prevent emergency zone voice announcements provided that the system is operating reliably.
(LEDs 8–15) Zone Alarm/Option Slot and (LEDs 16–23) Zone Fault/Option Slot
These two groups of LEDs indicate functionality of the option slot board, which depends on the type of option module that is tted
to the LSI-16. If no option slot board is installed, these LEDs will remain inactive.