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24. MAINTENANCE AND TROUBLESHOOTING
24-5
24.5 Troubleshooting
The troubleshooting table below provides common faults and the remedy with which
to restore normal operation.
Radar troubleshooting
If… then… Remedy
the radar echoes disappear and
the alert 727 "Radar Sensor
COM Error" appears
check the connection between
the EC-3000 and radar sensor.
Reconnect the cable (if loos-
ened) then restart the equip-
ment.
the alert 750 "EXT Radar COM
Error" appears
• check the connection be-
tween the EC-3000 of this
equipment and the EC-3000
in the LAN line.
• check the connection be-
tween the EC-3000 and ra-
dar sensor in the LAN line.
Reconnect the cable (if loos-
ened) then restart the equip-
ment.
the equipment cannot be turned
on
• power connector may have
loosened.
• ship's mains is off.
• fuse has blown.
• Check connector.
• Check ship's mains.
• Replace fuse.
the equipment can be turned on
but nothing appears on the dis-
play
• brilliance is too low.
• the ambient temperature is
less than 0°C (32°F).
• Adjust brilliance.
• The heater is warming the
EC-3000. The display ap-
pears in approx. 10 minutes.
key doesn't beep when operat-
ed
• key beep is turned off. • Turn on key beep from the
menu.
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 2.23.2 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.