User's Manual

PN 8700-10 Help Hot Line (U.S. only): 1-800-530-9960 10-7
620003-0 Rev. A
PRELIMINARY Fault Indications
Frequency band
not programmed
STATUS
Red Downlink fiber has
high optical loss.
Measure downlink optical fiber
loss.
Clean the downlink fiber con-
nectors.
Clean the Main and Expansion
Hubs’ downlink fiber ports.
Expansion Hub and
connected RAUs
are off-line
Expansion Hub internal
hardware failure.
Replace the Expansion Hub.
Expansion Hub is
over temperature
STATUS
Red Fan failure(s). If fans are not operating,
replace the Expansion Hub.
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.
Ambient temperature
above maximum
If fans are operating, check
room environmental controls.
Downlink pilot
failure
STATUS
Red Downlink fiber has
high optical loss.
Measure downlink optical fiber
loss.
Clean downlink fiber connec-
tors.
Clean the Main and Expansion
Hubs’ downlink fiber ports.
Expansion Hub and
connected RAUs
are off-line.
Main Hub internal
hardware failure.
If common point of failure for
more than one Expansion Hub,
replace Main Hub.
Main Hub downlink
port failure.
Move Main Hub fiber pair to
another port. If fault is not
reported, Main Hub port is bad,
replace when possible.
Expansion Hub down-
link port failure.
Swap suspect Expansion Hub
with working Expansion Hub.
If fault persists, replace the
Main Hub; otherwise, replace
the Expansion Hub.
Table 10-2 Expansion Hub Faults (continued)
Fault Message LED State Possible Causes Action Impact