USER MANUAL FOR MBDA-80
ENU STATUS : 1-0-0
Copyright - refer to title page
Page 49
6.2 TROUBLESHOOTING
Following installation and commissioning, occasional operation tasks to handle alarms may be required:
Table 9: Monitor Unit Alarms Diagnosis
Alarm condition
Diagnosis
RF Unit Alarm
Check RF Unit alarm on WEB GUI.
Ext Alarm
Check to make sure if the external device connected is working normally.
Fan Alarm
Check to make sure the fan is working normally.
Over-
Temperature
alarm
Check temperature on WEB GUI
If device temperature is over threshold, make sure environment temperature is within the
envireonment temperature range that device supported (-20~40
℃
). Apply climatic protection
to the system under severe environment.
Table 10: RF Unit Alarms Diagnosis
Alarm condition
Diagnosis
Over DL P_in
Alarm
Test DL input power of the alarm RF Unit, if it is higher than threshold, changing the threshold
value; when the DL input power is more than -40dBm, it is recommended to add an external
attenuator with proper attenuating value.
PLL Alarm
Check device on WEB GUI;
Restart the device, if the PLL alarm is not fixed, replace the RF Unit.
LNA Alarm
Check device on WEB GUI;
Restart the device, if the LNA alarm is not fixed, replace the RF Unit.
DL PA alarms
Check PA Service Status on WEB GUI RU page,
If it is [Recovery], reset PA on WEB GUI Management page, then read RF Unit output power:
If output power is exceed threshold, need to reduce gain or input power; if output power is
normall, check whether antenna port VSWR is too high.
If it is [Shutdown], Refer to Protection Shut Alram
Protection Shut
Alarm
Make Sure the environment temperature is -20~40
℃
Reset PA, if PA service status turns to [Recovery], and then refer to DL PA Alarms. If PA still
shutdown, the PA part maybe broken, please replace the RU.
End of Section
