Fish Finder User's Manual

3. There is no bottom reading visible on the display.
If the loss of bottom information occurs only at high boat speeds, the
transducer needs adjusting – see your PiranhaMAX™ Installation Guide for
details. Also, in very deep water, it may be necessary to increase the
sensitivity setting manually to maintain a graphic depiction of the bottom. If
you are using a transducer switch to connect two transducers to the
PiranhaMAX™, make sure that the switch is in the correct position to connect
a transducer that is in the water. (If a trolling motor transducer is selected and
the trolling motor is out of the water, no sonar information appears.) If none of
these actions solves the problem, inspect the transducer cable from end to end
for breaks, kinks, or cuts in the outer casing of the cable. If the transducer is
connected to the unit through a switch, temporarily connect it directly to the unit
and try again. If none of these actions identifies an obvious problem, the
transducer itself may be at fault. Be sure to include the transducer if returning
the unit for repair.
4. When in very shallow water, I get gaps in the bottom reading and
inconsistent digital depth indication.
The PiranhaMAX™ will work reliably in water 3 feet (90 cm) or deeper.
Remember that the depth is measured from the transducer, not from the
surface of the water.
5. The unit comes on before I press the POWER-MENU key, and won’t
turn off.
Check the transducer cable — if the outer jacket of the cable has been cut
and the cable is in contact with bare metal, you will need to repair the cut with
electrical tape. If there is no problem with the cable, disconnect the transducer
from the unit and see if the problem is corrected, to confirm the source of the
problem.
6. I get gaps in the reading at high speeds.
Your transducer needs adjusting. If the transducer is transom-mounted, there
are two adjustments available to you: height, and running angle. Make small
adjustments and run the boat at high speeds to determine the effect. It may
take several tries to optimize high-speed operation. This can also be a result of
air or turbulence in the transducer location caused by rivets, ribs, etc.
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