User's Manual

PN 8700-10 Help Hot Line (U.S. only): 1-800-530-9960 10-11
620003-0 Rev. A
PRELIMINARY Warning Indications
10.2.2 Warning Indications
Warnings alert you to conditions that may impact system performance and conditions
that indicate potential system failure.
Before addressing warnings, ensure that all faults are resolved. Take appropriate
action to resolve the warnings, as indicated in the following tables.
Main Hub Warnings
Table 10-4 Main Hub Warnings
Warning Message Action Impact
Downlink laser is failing Replace the Main Hub when possible. The downlink laser will eventually fail and
the system will be off-line.
Temperature is high Check room environmental controls. Potential Main Hub failure.
Fan failure Check the Main Hub fan for rotation, air
flow blockage, dust; replace the Main Hub
if temperature rises.
Temperature may rise to fault level result-
ing in Main Hub and connected Expansion
Hub(s) and RAU(s) being off-line.
EHn uplink fiber optical loss
greater than recommended maxi-
mum
Check the uplink fiber cable for optical
loss.
Clean the cable connector.
Clean the fiber ports.
Degraded system performance.