User Manual

5
7
MN024-08
Tables 3.5 and 3.6 show a brief description of the alarms related to a Case B
remote unit, with a reference to the corresponding alerted LEDs and to the
actions to be carried out in the case of a fault.
TFAN (tri band)
ALARM
CODE
(TSUN
description)
ALARM
DESCRIPTION
ACTIVE LED
SUPERVISION
PRIORITY
LEVEL
ACTION
RECOMMENDED
RELÉ
PRIORITY
LEVEL
(subrack)
Antenna DC
loop alarm
ALWAYS OK
DL optical power
fail
1
The optical power
received on the DL is
too low and can’t no
more be
compensated
RED MAJOR
Check the DL fibre
and the TFLN laser
status
MAJOR
AGC out of
range
1
The optical power
received is under the
allowed 3dB optical
loss but it can be
compensated
NONE WARNING
Clean optical
connectors
MINOR
DL RF low band
alarm
HW failure on the DL
low band RF section
RED CRITICAL Return the unit MAJOR
DL RF high
band alarm
HW failure on the DL
high band RF section
RED CRITICAL Return the unit MAJOR
External 1 alarm
Alarm on the device
connected on dry-
contact 1
RED MAJOR
Check the external
device or alarm
connection
MAJOR
External 2 alarm
Alarm on the device
connected on dry-
contact 2
RED MAJOR
Check the external
device or alarm
connection
MAJOR
Power supply
alarm
UPS HW failure or
malfunction.
RF is turned OFF
RED MAJOR
Check the external
PSU. If it works
properly, return the
unit
MAJOR
Internal BUS
alarm
A malfunctioning on
the digital part
involves a fault in
monitoring
functionalities
RED CRITICAL Return the unit MAJOR
Temperature
alarm
Over-temperature
alarm
NONE MINOR
Check ventilation
and environment
MINOR
DL UMTS band
alarm
HW failure on the DL
UMTS band RF
section
RED CRITICAL Return the unit MAJOR
TFAx
CaseB
Table 3.5. Description of the alarms of the TFAN Case-B Remote Unit,
as they are presented on LMT or Supervision Interface