COMBA COMFLEX Series - Page 67

USER MANUAL FOR COMFLEX-6Q00 5W
ENU STATUS: 1-0-1 Copyright - refer to title page Page 65
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

Clean optical cable connector with pure alcohol first, reconnect and see if alarm disappears
 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
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 (39dBm for MRU)
 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