Instruction Manual

Alarm Descriptions
10 (14) © Nokia Corporation DN00283923
Nokia Proprietary and Confidential Issue 2 DRAFT 1 - en
Table 4. Power Supply Unit alarms
2.2.5 Other alarms
Table 5. Other alarms
2.3 Remote unit alarms
Alarm Description
Alarm
Status
Auto
Recovery
Action
Ext_Temp Temperature in the Main
Unit cabinet above the
threshold. System Shut
Down. Red led is ON.
Major Yes System Shut Down while
the temperature value
exceeds the threshold.
OpDoor
(Open Door)
The cover of Main Unit is
open. Red led is ON.
Minor Yes Close and lock the main
unit cover.
Alarm Description
Alarm
Status
Auto
Recovery
Action
DC_Loop Antenna connector open
(no load). Max attenuation
of the downlink paths of the
RU is automatically set.
Minor Yes Check if antenna is
connected or correct type.
DL_Tone Downlink RF tone below
the threshold.
Minor Yes Clean DL fibre optic cable
or fit a new cable if this
one is damaged or
stretched.
DL_OptP Downlink Optical Power
below threshold: automatic
DL laser shut down of the
RU.
Minor Yes as above.
AGC Automatic Gain Control: out
of range
Minor Yes as above.
DL_900 900 MHz Downlink amplifier
current out of range
Minor No Remove the RU and fit a
known good RU