6
NEC D3-10i Quick Start Guide
6
Controller Status LEDs
There are three status LEDs on each controller that include, from left to right, a Backup LED, a Fault LED,
and a Ready LED. The Backup LED will only blink to indicate that the battery backup is currently powering
the unit. The Ready and Fault LEDs use the following signal combinations to indicate controller status.
Ready LED
Fault LED
Status
Blinking
OFF
Normal operating condition
ON
OFF
Startup sequence in progress
Rapid Blinking
OFF
Shutdown sequence in progress
Asynchronous Blinking
Online/automatic download sequence in progress
Synchronized Blinking
In download mode
ON
ON
Fault condition exists
ON
Blinking
Waiting for disk enclosure power-on
Blinking
ON
Disk interface is disabled
OFF
OFF
Powered off
Table 5. Controller Ready LED and Fault LED Status Conditions