User's Manual

Installing Unison Components PRELIMINARY
6-24 InterReach Unison User Guide and Reference Manual
PN 8700-10
620003-0
6.5.1 Troubleshooting Main Hub LEDs During Installation
The following Main Hub LED indications assume that the Expansion Hub LEDs have
already been checked.
• All Main Hub fiber port LEDs that have Expansion Hubs connected to them
should be Green/Red, indicating that the Expansion Hub is powered on and com-
munication has been established.
Table 6-6 Troubleshooting Main Hub LEDs During Installation Power On
During
Installation
Power On LED State Action Impact
Main Hub
power is On
with no
Expansion
Hubs con-
nected.
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 didn’t
blink
through all
states
Replace the Main Hub. Microcontroller not resetting 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
Connect
Expansion
Hub Fiber
Pair
LINK
Off Swap the uplink and downlink
cables. If the port LEDs do not illu-
minate, check the fiber uplink for
excessive optical loss.
Connect the fiber pair to another port.
If the second port’s LEDs do not illu-
minate Green/Red, replace the Main
Hub.
The Main Hub does not sense the
presence of the Expansion Hub.
If the second port works, flag the first
port as unusable; replace the Main
Hub when possible.
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 illu-
minate Green/Red, replace the Main
Hub.
The Expansion Hub does not sense the
presence of the Main Hub.
If the second port works, flag the first
port as unusable; replace the Main
Hub when possible.
E-HUB/RAU
Off