Grass Valley PRS 250 RAID Storage System - Manual (Page 16)

Chapter 1 Introduction
1-6 RAID Instructions
Voltage Semi-regulated Converters (VSCs)
The VSCs are power supplies that convert the installation site’s ac line voltage to the
48, 24, and 18Vdc required to power the modules in the RAID Storage chassis. The
chassis contains three VSCs for high-availability operation.
Two status lights on each VSC indicate the following:
Ready light (green) — Lights while VSC is operating normally.
Replace light (amber) — Lights when the SP determines that the VSC has failed.
The VSCs are visible when you swing the fan module down on the back of the RAID
Storage chassis.
You can remove or install a VSC while the storage chassis is running.
If a VSC fails, replace it as quickly as possible. With three VSCs, if one of them fails,
the RAID Storage continues to operate but you still should replace the failed VSC as
soon as possible to restore high-availability operation. Failure to replace the VSC
could cause the RAID Storage chassis to shut down if either the fan module or another
VSC fails. You should never open a VSC or attempt to replace any of its internal
components.
Ready light
(green)
Replace light
(amber)