CRITICALPOINT 700/800MHZ BDA/DAS/BBU V3 USER MANUAL
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Rev. 1-0-2 Rev. Date: 11-1-2024
A System Dry ALM has been detected from one or more Remote Units in the system. System
Dry ALM’s are used in the system to report Remote Unit alarms to the BDA/Master unit and
trigger the corresponding Dry-Contact and LED at the BDA/Master Unit and/or connected
external Annunciator Panels. The Dry-Contact configuration between the BDA/Master unit is
mirrored such that an alarm at a Remote Unit will trigger at the BDA/Master unit. For example,
if a Remote Unit has a “LOSS OF NORMAL AC POWER” alarm, it will trigger the System Dry
ALM 1, and the BDA/Master unit will trigger it’s Dry Contact output 1 indicating an AC Failure in
the system.
If APV3-DAS is installed, review the alarm status indicators to quickly identify where the alarm
is being generated in the system. Log into GUI and review the <Dashboard> page for active
system alarms. Identify the specific device in alarm and the specific alarm that has triggered.
Correct according to the other troubleshooting guides in this section.
The Optical Signal received by the FOU is too low. Optical Link not established.
Check fiber installation. See Appendix L for advice on fiber installation.
The Optical Signal transmitted from the FOU is below the internal hard-coded threshold. This
indicates a failure of a hardware connection or the Optical Transceiver.
Call Technical Support to further troubleshoot issue.
FOU Comm. Fault Alarm (FOU 1 - 4)
RS485 Communication has been lost between the BDA/MU and the FOU(s). FOU and
connected equipment are not detected.
Evaluate the RS485 cable connection between the BDA/MU and the FOU devices. Inspect the
FOU power connection. Ensure no cables have been damaged or disconnected. Power down
equipment and replace cables if necessary. Check the cable connection between FOUs (if
applicable). Unplug and reconnect cables to ensure there is a tight connection. If the problem
persists, call Technical Support.
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