Lowrance Auto-Standby button Metal NAIS 400 Owners Manual - Page 29

6 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 12 V or 24 V 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 12 V or 24 V 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 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 9.6 V to 31.2 V. • 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 chartplotters which will correct this issue. The other vessel should update its AIS unit and/or chartplotting software to receive AIS message 24. If the guidance given in the table above does not rectify the problem you are experiencing, please contact your dealer for further assistance. 28 | Troubleshooting | NAIS-400 User Manual