B&G NAIS-400 - Manual (Page 29)

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Troubleshooting | NAIS-400 User Manual
Troubleshooting
Issue Possible cause and remedy
No data is being
received by the
chartplotter
• Check that the power supply is connected
correctly.
• Check that the power supply is a 12V or 24V
supply.
• Check that the connections to the chartplotter
are correct.
No indicators are
illuminated
• Check that the power supply is connected
correctly.
• Check that the power supply is a 12V or 24V
supply.
The Red 'error'
indicator is
illuminated
• The unit may not have a valid MMSI. Check that
the AIS transceiver is correctly configured with a
valid MMSI.
• The VHF antenna may be faulty. Check the
connection to the VHF antenna and that the
VHF antenna is not damaged. The red indicator
may illuminate briefly if the power supply is
interrupted or the VHF antenna characteristics
are briefly affected.
• No GPS position fix can be obtained. Check that
the transciever is located where the internal GPS
antenna has a clear sky view or that an external
GPS antenna is properly connected and installed.
Review the GPS signal strength graph available
in proAIS2.
• The power supply is outside the allowable
range. Check that the power supply is within the
range 9.6V to 31.2V.
• If none of the above will correct the error
condition, please contact your dealer for advice.
• Check for error and alarm messages in proAIS2
My MMSI is being
received by other
vessels, but my
vessel name is not
shown on their
chartplotter or PC
Some older AIS devices and chartplotters do not
process the specific class B AIS message, which
provides the vessel name (message 24). This
is not a fault of your AIS transceiver. Software
upgrades are available for many older chart-
plotters which will correct this issue. The other
vessel should update its AIS unit and/or chart-
plotting software to receive AIS message 24.
If the guidance given in the table above does not rectify the prob-
lem you are experiencing, please contact your dealer for further
assistance.
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