Troubleshooting - Comba Telecom RA-5J00 User Manual

6 TROUBLESHOOTING

Following installation and commissioning, occasional operation tasks to handle alarms may be required:
Alarm condition
AC Power Failure Alarm/ DC
Power Fault Alarm
Li-ion Battery Fault Alarm
External Alarm
Over- Temperature alarm
Door Open Alarm
Shutdown Alarm
Optical TX/RX Alarm
UL LNA, DL PA alarms
DL Input Power Overload
Alarm
DL Output Power Overload
Alarm
DL Output Power Low Alarm
External Alarm
ENU STATUS : 1-0-0
USER MANUAL FOR RA-5J00 III3
Table 12: Alarms Diagnosis
Diagnosis
Check AC power cable and verify AC mains supply is normal.
During Power Fault alarm, DC power supply has no output. Check if
DC output power is overloaded or short-circuited. The PSU could be
faulty.
Check the connection between battery and power supply cable. Or
replace the faulty modules and return it to the factory for repair.
Check to make sure if the external device connected is working
normally
Eliminate alarm by correct setting of temperature threshold, if alarm
can not be cleared, apply climatic protection to the system under
severe environment.
Check whether the enclosure door is closed.
Alarm occurs when automatically shut off the system. Turn on the
system and check if the DL output power overload alarm persists,
adjust the DL output power overload threshold to a proper value.
The optical power at the TX/RX port of the Optical TX/RX Module is
lower than the minimum requirement, which is resulted by the faulty
of the optical TX/RX part of Optical TX/RX Module or damaged
optical fiber link. If so, replace the optical TX/RX module. If not,
check the working status of the optical fiber to eliminate the alarm.
Check power and signal connections of respective modules. If the
power and signal wire connections are OK, then the respective
modules may be faulty. Replace the faulty modules and return it to
the factory for repair.
Eliminate alarm by correct setting of DL Input Power Overload
threshold. If the setting is OK but alarm persists, the DL input power
might be higher than the threshold. Decrease the gain to reduce the
input power or replace the coupler with a new one of high coupling
effect.
Eliminate alarm by correct setting of DL Output Power Overload
threshold. If the setting is OK but alarm persists, the DL output
power might be higher than the threshold. Decrease the gain to
reduce the output power.
Eliminate alarm by correct setting of DL Output Power Low
threshold. If the setting is OK but alarm persists, the DL output
power might be lower than the threshold. Increase the gain to high
up the output power.
Check to make sure if the external device connected is working
normally
End of Section
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