Applies to: Furuno FELCOM18 · OME-56740-G2 · 2018-05-16
Work through these checks
Furuno FELCOM18 Inmarsat-C · OME-56740-G2
Use the FELCOM18 manual OME-56740-G2, dated 16 May 2018; do not substitute FELCOM19 or FleetBroadband instructions. Retuning followed by SYNC(NCS) indicates synchronization for EGC reception, not proof of successful ordinary-message delivery. Read Login and Current State separately; IDLE can be normal. Record the exact CAUTION text, time, GPS Status, DCE Memory and Antenna Power Supply status. Send Level is normally zero during reception; do not transmit just to change it. Preserve messages and settings. Do not start PV, distress or SSAS tests, clear alarms or reset the installation as diagnosis. Follow the qualified ship operator’s procedure. The archived manual does not confirm present service or compliance.
When to stop and get help
Do not continue these checks in unsafe conditions. For immediate danger, use local emergency services and the device’s emergency instructions. Otherwise, contact your provider or a qualified technician.
What to tell support
Write down your exact model, service provider and on-screen message. Photograph the existing connections for your own reference before changing anything. Furuno FELCOM18 · OME-56740-G2 · 2018-05-16
Original troubleshooting guidance based on the official sources below. Menu names can change. This is an independent guide, not a manufacturer service bulletin or a bench-tested repair.