Users Guide

Hardware Overview 185
System LEDs
The system LEDs, located on the front panel, provide information about the
power supplies, thermal conditions, and diagnostics.
Table 3-58 shows the System LED definitions for the Dell EMC Networking
N4000 Series switches.
Table 3-58. System LED Definitions—Dell EMC Networking N4000 Series Switches
LED Color Definition
System Blinking blue The switch is booting
Solid red A critical system error has occurred.
Blinking red A noncritical system error occurred (fan or power
supply failure).
Temp Off The switch is operating at normal temperature.
Solid amber The thermal sensor’s system temperature threshold of
75°C has been exceeded.
Diag Off The switch is operating normally
Blinking green A diagnostic test is running.
Fan Solid green The fan is powered and is operating at the expected
RPM.
Solid red A fan failure has occurred.
Stack Solid blue The switch is in stacking master mode.
Solid amber The switch is in stacking slave mode.
Off The switch is in stand-alone mode.
Locator Blinking green The locator function is enabled.
Solid green The locator function is disabled.