User's Manual

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620003-0 Rev. B
7.4.1.1 Troubleshooting Main Hub LEDs During Installation
Table 7-5 Troubleshooting Main Hub LEDs During Installation
During
Installation
Power On LED State Action Impact
1. Main Hub
power is
On with
no Expan-
sion Hubs
connected.
POWER
Off Check AC power; check that the Main Hub
power-on switch is on; replace Main Hub
Main Hub is not powering
on.
LINK
LEDs on but
they didn’t
blink through
all states
Replace the Main Hub. Microcontroller not reset-
ting properly; flash memory
corrupted.
E-HUB/RAU
LINK
Red The port is unusable; replace the Main Hub
when possible.
Fiber sensor fault, do not
use the port.
E-HUB/RAU
Off
2. Main Hub
power is
On with
Expan-
sion Hubs
connected
and pow-
ered on.
LINK
Off • If the port LEDs do not illuminate,
check the fiber uplink for excessive opti-
cal loss.
• If Expansion Hub’s DL status LED is
red:
• Verify that the fiber is connected to
the correct port (i.e., uplink/down-
link)
• Swap the uplink and downlink
cables.
• Connect the fiber pair to another port. If
the second port’s LEDs do not illumi-
nate Green/Red, replace the Main Hub.
• If the second port works, flag the first
port as unusable; replace the Main
Hub when possible.
No uplink optical power,
Expansion Hub is not recog-
nized as being present.
No communication with the
Expansion Hub.
E-HUB/RAU
Off
LINK
Red • If the Expansion Hub DL STATUS LED
is red, check the downlink fiber cable
for excessive optical loss.
• Connect the fiber pair to another port. If
the second port’s LEDs do not illumi-
nate Green/Red, replace the Main Hub.
• If the second port works, flag the first
port as unusable; replace the Main
Hub when possible.
No communication with the
Expansion Hub.
E-HUB/RAU
Off
LINK
Green Expansion Hub or connected RAU reports
a fault
Use AdminManager to determine the prob-
lem.
Expansion Hub or one or
more RAUs are off-line.
E-HUB/RAU
Red