NorthStar EXPLORER 443D Installation And Operation Manual page 37

b) The transducer may be in turbulent water.
Air bubbles in the water disrupt the echoes
returned, interfering with the fishfinder's
ability to find the bottom or other targets.
This often happens when the boat is
reversed. The transducer must be mounted
in a smooth flow of water in order for the
fishfinder to work at all boat speeds.
c) Electrical noise from the boat's motor
can interfere with the fishfinder. Try some
suppression spark plugs.
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
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.
twice to restore
Northstar Explorer 443d/443df Installation and Operation Manual
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.
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