3Com 3812 Getting Started Guide - Page 16

Switch - Rear View Detail, Power/Self Test LED Switch 3848 only

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16 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 3812, SWITCH 3824, AND SWITCH 3848 LED Color Indicates Off No link is present. Power LED (Switch 3812 and Switch 3824) Green The Switch is powered-up and operating normally. Red The Switch has a fault with the Power Supply Unit. Off The Switch is not receiving power or there is a fault with the Power Supply Unit. Self Test LED (Switch 3812 and Switch 3824) Green flashing There is a test in progress. Green All tests have been passed and the Switch is ready for use. Red A fault has occurred. Red flashing An internal fan has failed. Off The unit is booting-up. Power/Self Test LED (Switch 3848 only) Green The Switch is powered-up and operating normally. Green flashing The Switch is either downloading software or is initializing (which includes running a Power On Self Test). Yellow The Switch is faulty. Off The Switch is not receiving power or there is a fault with the Power Supply unit. Fault LED (Switch 3848 only) Red The Switch and/or the PSU are above critical temperature but below critical shut down temperature. Fans are operating normally. Off The Switch and PSU are below critical temperature. One or more fans have failed. Switch - Rear View Detail Figure 4 Switch 3812 and Switch 3824 - rear view

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16
C
HAPTER
1: I
NTRODUCING
THE
S
UPER
S
TACK
3 S
WITCH
3812, S
WITCH
3824,
AND
S
WITCH
3848
Switch
—
Rear View
Detail
Figure 4
Switch 3812 and Switch 3824 — rear view
Off
No link is present.
Power LED (Switch 3812 and Switch 3824)
Green
The Switch is powered-up and operating normally.
Red
The Switch has a fault with the Power Supply Unit.
Off
The Switch is not receiving power or there is a fault
with the Power Supply Unit.
Self Test LED (Switch 3812 and Switch 3824)
Green flashing
There is a test in progress.
Green
All tests have been passed and the Switch is ready for
use.
Red
A fault has occurred.
Red flashing
An internal fan has failed.
Off
The unit is booting-up.
Power/Self Test LED (Switch 3848 only)
Green
The Switch is powered-up and operating normally.
Green flashing
The Switch is either downloading software or is
initializing (which includes running a Power On Self
Test).
Yellow
The Switch is faulty.
Off
The Switch is not receiving power or there is a fault
with the Power Supply unit.
Fault LED (Switch 3848 only)
Red
The Switch and/or the PSU are above critical
temperature but below critical shut down temperature.
Fans are operating normally.
Off
The Switch and PSU are below critical temperature.
One or more fans have failed.
LED
Color
Indicates