User's Manual

PN 8700-10 Help Hot Line (U.S. only): 1-800-530-9960 10-5
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PRELIMINARY Fault Indications
Expansion Hub Faults
Table 10-2 Expansion Hub Faults
Fault Message LED State Possible Causes Action Impact
Hardware failure.
STATUS
Red Expansion Hub internal
hardware failure.
Main Hub inter-
nal hardware
failure. ? (JS)
Downlink fiber has
high optical loss.
If common point of failure for
more than one Expansion Hub,
replace the Main Hub.
Measure downlink optical fiber
loss.
Clean the Expansion Hub’s
downlink fiber port.
Clean the Main Hub’s down-
link fiber port.
Replace the Expansion Hub.
Expansion Hub and
connected RAUs
are off-line
PLL unlock.
STATUS
Red Internal hardware fail-
ure.
Replace the Expansion Hub. Expansion Hub and
connected RAUs
are off-line
Frequency band
not programmed.
STATUS
Red Internal hardware fail-
ure.
Cycle power on the Expansion
Hub. If fault persists, replace
the Expansion Hub.
Expansion Hub and
connected RAUs
are off-line
Expansion Hub is
over temperature.
STATUS
Red Fan failure(s).
Ambient temperature
above maximum
If fans are not operating,
replace the Expansion Hub.
If fans are operating, check
room environmental controls.
Expansion Hub and
connected RAUs
are off-line.
RAUs are com-
manded off-line
which disables their
power amplifiers. If
the Expansion Hub
temperature does
not start to drop, the
Expansion Hub will
disable DC power
to all RAUs.
Downlink pilot
failure.
STATUS
Red Downlink fiber has
high optical loss.
MH downlink port fail-
ure.
EH downlink port fail-
ure.
MH internal hardware
failure.
EH internal hardware
failure.
If common point of failure for
more than one EH, replace MH.
Measure DL optical fiber loss.
Clean MH downlink fiber port.
Clean EH downlink fiber port.
Replace EH.
EH and connected
RAUs are off-line.