Dell Force10 S4820T System Getting Started Manual page 15

Table 1 lists the LED definitions for the S4820T system.
Table 1. System LED Displays
Feature
System LED
TEMP LED
DIAG LED
FAN LED
STACK LED
LOCATOR LED
NOTE: The system temperature threshold is 75°C. When one of the thermal
sensors exceeds this temperature, the TEMP LED turns RED.
Detailed Description
• Solid blue –Normal
Operation
• Blinking blue –Booting
• Solid red –Critical system
error
• Blinking red –Non-
critical system error (fan
fail, power supply fail)
• Off: Normal temperature
• Solid red –Overtemp
(Refer NOTE:)
• Off –Normal operating
• Solid green –System
Booting or Diagnostics
• Solid green –fan powered
and running at the
expected rpm
• Solid red –fan failed
• Solid blue –Switch in
stacking master mode
• Solid green–Switch in
stacking slave mode
• Off – Switch in stand
alone mode
• Blinking blue – locator
function is enabled
• Solid blue – locator
function is disabled
Comment
I/O side
PSU side
PSU side
PSU side
PSU side
PSU side
Hardware Overview
9