25. MAINTENANCE AND TROUBLESHOOTING
25-6
Chart troubleshooting
key doesn't beep when operat-
ed
• key beep is turned off. • Turn on key beep from the
menu, referring to
section 22.8.
picture not updated or picture
freezes.
• If the picture freezes, the
buzzer sounds and the Sta-
tus LED blinks in red.
• Restart the equipment.
picture does not change even
though range is changed.
• suspect faulty the RANGE
key or video freeze.
• Hit the RANGE key several
times. If nothing happens, re-
start the equipment.
only two index lines are dis-
played
• check index line distance set-
ting.
• Refer to section 2.22.3 for
how to adjust index line dis-
tance.
range rings are not displayed • range rings are hid. • Turn on the range rings.
tracked target is not tracked
correctly
• sea clutter etc. are masking
tracked target.
• Adjust A/C SEA and A/C
RAIN to suppress sea and
rain clutters.
sensitivity is poor • suspect second-trace echo
or soiled radiator.
• Reject second-trace echo;
clean radiator.
If… then… Remedy
message "No connec-
tion to dongle" appears
• dongle is not connected. • Connect dongle.
the message "There is
no dongle or an error
has occurred in the
dongle. The system will
automatically shut
down." appears
• dongle is not connected.
• data in the dongle is corrupted.
• Connect dongle.
• Contact FURUNO for assistance.
monitored route is not
displayed
• route has not been selected.
• monitor route has not been se-
lected to be visible above the
chart.
• Select route to monitor.
• Open the [Route] page of the
[Symbol Display] menu and check
the monitored route parts to show.
planned route is not
displayed
• route has not been selected.
• planned route has not been se-
lected to be visible above the
chart.
• Select route as “planned”.
• Open [Route] page of [Symbol Dis-
play] menu and check the planned
route parts to show.
route monitoring is
stopped
• Alert 691 (ALF format:
10800,1): RM Stop - Exceed
Max XTE. Own ship is too far
away from the route.
• Alert 692 (ALF format:
10800,3): RM Stop - No Valid
Sensor Data. Chart radar inter-
nal error.
• Alert 693 (ALF format:
10800,2): RM Stop - Other
Causes. Required data (posi-
tion, SOG/COG) not found.
• Steer the ship back to the route
then restart route monitoring.
• Request service.
• Check sensor connections.
symbol of user chart
cannot be erased
• two or more symbols may be
su
perimposed on each other.
• Do the delete action several times.
If… then… Remedy
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