The following LED status modes will be available to assist in the quick diagnosis of issues:
1 - Solid red and amber LEDs: No MMSI / external power outside of required range (12-24V)
2 - Flashing amber LED: the unit is waiting for a GPS fix.
3 - Flashing red LED: VSWR exceeding limit. (Good VSWR is around 1.2:1)
4 - Solid red LED: System error (check Diagnostics tab of proAIS2 for detail on the failure)
If you see any different LED status lights displayed, or if you have any questions about the examples shown above, then please contact the Customer Support Team for advice at: support@em-trak.com
Alternatively, connect your B921, B922, B923 or B924 to the latest version of proAIS2 to check the diagnostic status of your unit.