User Manual

MN021-01
Page 14 of 28
8. Troubleshooting
ALARM DESCRIPTION LED STATUS SEVERITY ACTION
UL AGC out of range
RU1, 2, 3, or 4
Flashing MINOR
Optical power below –4dBm:
check for fiber or splices
stresses, clean optical
connectors
UL optical power too low
RU1, 2, 3, or 4
Fixed MAJOR
Low optical power below –6
dBm: check for fiber or splices
stresses, clean optical
connectors
If TFAF has faulty laser,
replace TFAF
DL laser optical power too low LU Fixed MAJOR Laser failure: replace TFLF
UL RF amplifier LU Fixed MAJOR Internal failure: replace TFLF
DL RF amplifier LU Fixed MAJOR Internal failure: replace TFLF
Temperature alarm LU Flashing MINOR
External temperature too high:
check air circulation
Supply alarm LU Fixed MAJOR Internal failure: replace TFLF
REMOTE UNIT ALARM DESCRIPTION
DL AGC out of range
RU1, 2, 3, or 4
Flashing MINOR
Optical power below –4dBm:
check for fiber or splices
stresses, clean optical
connectors
DL optical power too low
RU1, 2, 3, or 4
Fixed MAJOR
Optical power below –6dBm:
check for fiber or splices
stresses, clean optical
connectors
DL RF amplifier 1
RU1, 2, 3, or 4
Fixed MAJOR Internal failure: replace TFAF
DL RF amplifier 2
RU1, 2, 3, or 4
Fixed MAJOR Internal failure: replace TFAF
Antenna disconnected
(DC loop)
RU1, 2, 3, or 4
Flashing MINOR
Antenna cable probably broken
or disconnected.
Antenna connected to TFAF
doesn’t support DC-loopà see
store procedure to mask
unwanted alarm
External 1
RU1, 2, 3, or 4
Fixed MAJOR External alarm 1
External 2
RU1, 2, 3, or 4
Fixed MAJOR External alarm 2
NOTE: All major alarms will trigger the dry contacts to “closed” status.