NV5/NV3.5 Troubleshooting Manual Responding to alarms
Issue 3.2 2014-12-10 Page 1-5
4. If the troubleshooting and subsequent replacement of a suspect PWB or RF power module
does not remove the fault condition, contact Nautel.
List of current alarms
If an alarm exists and is being recognized by the transmitter, it is displayed under the Alarms tab of
the transmitter status page (see Figure 1.1 on page 1-4). The
Device name indicates the sub-system
origin of the alarm. The sub-systems that can be displayed are:
– Controller: All alarms in this sub-system apply to the controller.
– Exciter A: All alarms in this sub-system apply to exciter A.
– Exciter B: All alarms in this sub-system apply to exciter B.
– Module #: All alarms in this sub-system apply to a specific RF power module (1 and 2).
Table 1.1 on page 1-7 contains a column for most Alarms that can occur, sorted alphanumerically for
each sub-system. The Description and Troubleshooting Action column provides a brief description
of the alarm, troubleshooting tips and a cross-reference to more detailed troubleshooting, as
applicable.
Backup monitoring LEDs
The control/interface PWB (A1) contains LEDs that provide specific status and alarm indications.
Status indications include
RF ON/RF OFF, LOCAL/REMOTE and low voltage power supply status (+5V,
+15V, -15V, +12V). Alarm indications include a summary alarm (SMY ALARM) and more specific
location alarms (OUTPUT NETWORK, IPA/PA, EXCITER, POWER SUPPLY or EXTERNAL. There are
also LEDs that indicate the approximate RF output power level, from
100% down to 10% (in 10%
steps), relative to maximum RF output power for that mode of operation. The
LIMIT LED indicates
that the transmitter is attempting to exceed its maximum (100%) RF output capability.
NOTE:
Before undertaking any troubleshooting, record all AUI meter readings and note if any other
alarms are displayed on the
Transmitter Status page. Record all alarms. The most
convenient way to do this is by using a web browser over a LAN connection to save screen shots
of critical status, meter and alarm pages. From the System Review page, press the
information (!) button for each sub-device (Controller, Exciter and Module) to view (and save)
detailed information.
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