USER MANUAL FOR COMFLEX-5H00 1W2W
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Copyright - refer to title page
Page 68
6.2
TROUBLESHOOTING
Following installation and commissioning, occasional operation tasks to handle alarms may be required:
Table 16: MU Alarms Diagnosis
Alarm condition
Diagnosis
Over-
Temperature
alarm
Check device temperature on WEB GUI
If device temperature is over threshold, make sure environment temperature is
within the envireonment temperature range that MU supported (0~40
℃
). Apply
climatic protection to the system under severe environment.
Optical TX Alarm
Test MU transmit optical power
Replace FOU if transmit optical power is less than -7dBm
Optical RX Alarm
Use Optical Power Meter to test received optical power
If received optical power is lower than -10dBm, test whether RU transmit
optical power is normal (3~5dBm)
Check if optical loss of fiber link is higher than 6.5dBo
Clean fiber connector with absolute ethanol
DL Input Power
Overload Alarm
Test DL input power of MU, if it is higher than +33dBm, choose proper coupler to
ensure the input power to MU is lower than +33dBm.
Table 17: RU Alarms Diagnosis
Alarm condition
Diagnosis
External Alarm
Check to make sure if the external device connected is working normally
Over-
Temperature
alarm
Check device temperature on WEB GUI
If device temperature e is over threshold, make sure environment temperature
is within the envireonment temperature range that RU supported (-
20~50
℃
).Apply climatic protection to the system under severe environment.
Optical TX Alarm
Test RU transmit optical power
Replace FOU if transit optical power is less than 0dBm
Optical RX Alarm
Use Optical Power Meter to test received optical power
If received optical power is lower than -14dBm, test whether MU transmit
optical power is normal (-4~-2dBm)
Check if optical loss of fiber link is higher than 6.5dBo
Clean fiber connector with absolute ethanol
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 RU
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 PA Shutdown Alram
DL Output Power
Overload Alarm
Check if output power is exceed the threshold (32dBm@1W, 35dBm@2W)
Decrease the gain to reduce the output power
PA Shutdown
Alarm
Make Sure the environment temperature is -20~50
℃
Reset PA, if PA service status turns to [Recovery], and then refer to DL PA
Alarms. If PA still shutdown, the PA module maybe damaged, please contact
with Comba to replace the RU.
LNA Alarm
Uplink LNA modual damaged, please contact with Comba to replace the RU.
End of Section
