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Navman FISH 4432 Manual

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7. If the fishfinder beeps when turned on
but nothing is displayed:
The fishfinder may be operating, but the
backlight settings may have been set
too low. See section 2 Basic Operation,
to adjust the fishfinder backlight. Press
twice to restore default backlight settings.
8. The wrong language is displayed:
See section 3-1 Setup > System.
9. Fuel used or remaining seem inaccurate:
a) If the engine is run while the fishfinder is
powered off, the fishfinder does not record
the amount of fuel used during that engine
run. Consequently, the Fuel remaining
value will be higher than the actual amount
of fuel remaining in the tank.
To avoid this problem, use the Auto
Power Wiring option described in section
6-5 Wiring options. This ensures that
the fishfinder powers on automatically
whenever the boat’s ignition is switched on.
b) In rough seas, fuel may surge back and
forth through the fuel transducer, resulting
in incorrect readings. Try installing a
one-way valve between the fuel transducer
and the fuel tank.
c) The Set remaining fuel value must be
reset after every refuelling (see section 3-3
Setup > Fuel).
d) The fuel tank may not refill to the same
capacity each time due to air pockets.
This is particularly noticable with
underfloor tanks.
e) Fuel transducers wear out over time and
should be replaced after every 5000 litres
of fuel.
10. Flow indicates no fuel or low fuel:
a) Check that the number of engines is set to
1. See section 3-3 Setup > Fuel.
b) Check that the fuel cable connectors are
securely plugged in and the collar is locked
in place. The collar must be locked in place
to give a watertight connection.
c) A fuel transducer may be clogged. If so,
remove the transducer from the fuel line
and gently blow through it in the opposite
direction to the fuel flow.
A fuel filter between the fuel transducer
and the fuel tank must be installed as per
the fuel installation guide. Failure to do so
will void the warranty.
d) Inspect the fuel cable from end to end for
damage such as cuts, breaks, trapped or
squashed sections.
e) Check that the fuel filter is clean.
11. A twin engine installation shows only
one flow rate:
a) Check that the number of engines is set to
2. See section 3-3 Setup > Fuel.
12. Erratic Fuel Flow readings:
a) The fuel flow transducer may have been
mounted too close to the fuel pump or may
be subject to excessive vibration. Refer to
the installation instructions supplied with
the fuel transducer.
b) Check for leaks in the fuel line or in the fuel
pickup in the tank.
c) The Flow filter value is not suitable for
the engine. Check that the value is not set
to zero, then try increasing the value until
a steady flow rate is shown. See section 3-3
Setup > Fuel.
d) A higher fuel Flow filter setting be
used on EFI (fuel injected) engines. See
section 3-3 Setup > Fuel.
13. There is no reading for fuel economy:
a) The boat must be travelling through the
water to generate an Economy reading.
b) Check that the paddlewheel on the
transducer is spinning freely and that the
two magnets in the paddlewheel are still
in place.
14. There is a double bottom trace
displayed:
a) The boat may be in an area that generates
shadows. See section 4-1 Interpreting the
display.
b) In shallow water, the echoes may bounce.
Reduce the gain setting (see section 4-4
Gain) and/or reduce the sonar pulse power
(see section 3-2 Setup > Sonar).
c) Decrease the Range.
15. No Sonar Display
Sonar is turned off. See Section 3-1
System > Setup.
FISH 4432/4433 Installation and Operation Manual37
NAVMAN
… 35


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