Troubleshooting - COMBA COMFLEX Series User Manual

6.2

TROUBLESHOOTING

Following installation and commissioning, occasional operation tasks to handle alarms may be required:
Alarm condition Diagnosis

Over-
Temperature

alarm

Optical TX Alarm


Optical RX Alarm



DL Input Power Test DL input power of MU, if it is higher than +32dBm, by decreasing source output power or
adding an external attenuator with proper attenuating value.
Overload Alarm
ENU STATUS: 1-0-1
USER MANUAL FOR COMFLEX-6Q00 5W
Table 16: MU Alarms Diagnosis
Check 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.
Test MU transmit optical power
Replace FOU if transmit optical power is less than -7dBm
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 -10dBm, test whether RU transmit optical power is
normal (3~5dBm)
Check if optical loss of fiber link is higher than 6.5dBo
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