Dell SC180 Owner's Manual page 14

Item Feature
14
Indicator Code
• Amber (flashing) — Flashes in 1-second intervals when
drive or enclosure indicator is set to On in Dell Storage
Client.
With the drive indicator, the containing drawer fault LED will
also flash. With the enclosure indicator, all drives' and both
drawers' fault LEDs will flash.
About the SC180 Expansion Enclosure