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3. There is no bottom reading visible on the display.
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 certain speeds.
The suction cup mount is designed for quick, easy installation and removal,
NOT for high speed operation. If you intend to operate your boat at any speed
faster than trolling speeds, remove the suction cup transducer from the water.
The transducer position may need to be adjusted. A mix of air and water flowing
around the transducer (cavitation) may be interfering with the interpretation of
the sonar data. See your Installation Guide for suggestions on adjusting the
transducer position, height, and running angle.
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