Furuno USA Inc 9ZWRTR105 ユーザーズマニュアル

24.  MAINTENANCE AND TROUBLESHOOTING

The troubleshooting table below provides common faults and the remedy with which 
to restore normal operation.

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.