Operation Manual

4. MAINTENANCE, TROUBLESHOOTING
13
4.3 Troubleshooting
Heading is not output
Check installation site:
• Check for interfering objects near the antenna.
• Check the installation site and mounting base for vibration.
• Check for antenna of radar, radio equipment, etc. near the installation site.
Check connections:
1. NMEA-2000 bus connection
• Check that the connector on the SC-30 is tightly connected.
• Check that no stress is applied to the cable and that a loop has been made with the cable
to prevent cable stress.
• Check that terminators (120 ohm) are attached at each end of the NMEA 2000 network.
• Check that the input voltage to the SC-30 is 12-24 VDC.
• Check that all devices connected to the NMEA 2000 bus are within the current capacity of
the bus.
• Check that the cable (MJ-A10SPF0016-060C (6m)) is used. (If power is fed through a trunk
line, the feeder cable shall be no longer than 6 m).
• If power to the SC-30 is fed directly from the ship's mains, check breaker switch on mains
switchboard and fuse in power cable.
2. IF-NMEASC interface unit connection:
See the IF-NMEASC's operator's manual.
Heading output stops often. Position and GPS-related items are output but heading is
not.
• Check for interfering object near the SC-30.
• Check installation site for vibration.
• Check if antenna of radar, radio equipment, etc. is near the installation site.
Equipment in NMEA 2000 network malfunctions when SC-30 is connected
• Check that terminators (120 ohm) are attached at each end of the NMEA 2000 network.
• Check that the input voltage to the SC-30 is 12-24 VDC.
• Check that all devices connected to the NMEA 2000 bus are within the current capacity of the
bus.
• Check that the cable (MJ-A10SPF0016-060C (6m)) is used. (If power is fed through a trunk line,
the feeder cable shall be no longer than 6 m).
Heading is output normally in fine wather but is not output in bad weather
• Check the installation site for vibration.
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