User's Manual

9-10 InterReach Unison Installation, Operation, and Reference Manual PN 8700-10
620003-0 Rev. B
Remote Access Unit Faults
Table 9-3 Remote Access Unit Faults
Fault Message LED State Possible Causes Action Impact
Hardware failure
ALARM
Red Internal hardware failure. Replace the RAU. RAU is off-line.
Frequency band
not programmed
ALARM
Red Wrong version of RAU for
frequency band desired.
Replace the RAU if not valid
for desired frequency band.
RAU is off-line.
RAU is over
temperature
ALARM
Red Ambient temperature
above maximum.
Check environmental controls;
move the RAU to cooler envi-
ronment.
RAU is off-line.
Power supplied
by Expansion
Hub is too low
ALARM
Red Cat-5/6 cable failure. Verify Cat-5/6 cable has no
shorts or opens.
RAU is off-line.
RAU internal failure.
or
Expansion Hub port fail-
ure.
Move the RAU cable to another
Expansion Hub port. If fault
persists, replace the RAU; oth-
erwise, the Expansion Hub port
is bad, mark the port as unus-
able and replace the Expansion
Hub when possible.
Expansion Hub internal
failure.
If more than one RAU con-
nected to the same Expansion
Hub reports this failure, replace
the Expansion Hub.
Downlink pilot
failure
ALARM
Red Cat-5/6 cable failure. Verify that the Cat-5/6 cable
has no shorts or opens.
Verify maximum Cat-5/6 cable
length of 150 meters.
Verify minimum Cat-5/6 cable
length of 10 meters.
Degraded perfor-
mance or RAU is
off-line.
RAU internal failure.
or
Expansion Hub port fail-
ure.
Move the RAU cable to another
Expansion Hub port. If fault
persists, replace the RAU; oth-
erwise, the Expansion Hub port
is bad, mark the port as unus-
able and replace the Expansion
Hub when possible.
Expansion Hub internal
failure.
If more than one RAU con-
nected to the same Expansion
Hub reports this failure, replace
the Expansion Hub.