Furuno FCV-288, Operator'S Manual

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3. MAINTENANCE, TROUBLESHOOTING
22
3.4 How to Replace the
Fuse
If you cannot turn on the power, the fuse
(Type: FGBO-A 125V 3A PBF, Code No.:
000-155-850-10) may have blown. Find the
cause before replacing the fuse. If the fuse
blows after replacement, contact your dealer
for advice.
3.5 Battery Voltage
Alert
A battery icon appears at the top of the dis-
play when the battery voltage is too high or
too low.
3.6 Troubleshooting
The table below provides basic troubleshoot-
ing procedures which the user may follow to
restore normal operation.
Troubleshooting table
Icon Meaning
Voltage is lower than 10 VDC. If the
voltage goes below 9 V, the equip-
ment is automatically turned off.
Voltage is higher than 33.2 VDC. If
the voltage goes higher than 34.2 V,
the equipment is automatically
turned off.
WARNING
Use the proper fuse.
Use of a wrong fuse can result in fire and
damage the equipment.
If… Then check…
the screen is
blank • adjust the brilliance.
neither echo nor
fixed range
scale appears • battery voltage.
• fuse.
• power cable connection.
• breaker.
no echo ap-
pears but the
fixed range
scale appears • if display advance
speed is set to [Stop].
• transducer connector.
• transducer cable.
echo appears
but zero line
does not • if range shifting is set to
"0".
• if zero line rejection is
“Off”.
• draft setting; it should be
other than “0”.
sensitivity is low • gain setting.
• if air bubbles or marine
life is not clinging to the
transducer face.
• if sediments are
present in the water.
• if the bottom is too soft
to return an echo.
there is extreme
interference or
noise • if the transducer is too
close to the engine.
• if the unit is properly
grounded.
• if other echo sounders
of the same frequency
as own are being oper-
ated nearby.
the speed/water
temperature
readout is unre-
alistic or not
present • sensor plug.
the position
readout is unre-
alistic or not
present • the connection between
fish finder and naviga-
tor.
• navigator.