Dell Force10 S4820T System

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