3Com 3C17709 Getting Started Manual page 17

LED Color
Unit Status LED (cont.)
Green flashing
Yellow
Off
Layer 3 LED
Green
Off
PSU LEDs (Front of Switch)*
Green
Red
Red flashing
Off
PSU LED (PSU Module)
Green
Off
Fans (F = Front)
Red
Red flashing
Off
Fans (R = Rear)
Red
Red flashing
Off
3Com Switch 4050 and 4060 — Front View Detail
Indicates
The Switch is either downloading software or is
initializing (which includes running a Power On Self
Test).
The Switch has failed its Power On Self Test
or
A port has failed and had been automatically disabled.
You can verify this by checking that the Port Status LED
is quickly flashing Yellow. If a port fails the Switch
passes its Power On Self Test and continues to operate
normally.
The Switch is not receiving power or there is a fault
with the Power Supply unit.
The Switch software supports Layer 3.
The Switch software does not support Layer 3.
PSU fitted and enabled
PSU fitted and not operational
PSU has shut down due to over-heating
No PSU fitted
The PSU module is installed and is supplying DC power
to the Switch.
The PSU module is not supplying power and may have
shut down due to a fault.
One or both fans have failed
Fan Tray has been removed
Fan Tray fitted and enabled.
One or both fans have failed
Fan Tray has been removed
Fan Tray fitted and enabled.
17