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Troubleshooting
Do not attempt to repair the PiranhaMAX yourself. There are no user-serviceable parts
inside,andspecialtoolsandtechniquesarerequiredforassemblytoensurethewaterproof
integrity of the housing. Repairs should be performed only by authorized Humminbird®
technicians.
Many requests for repair received by Humminbird® involve units that do not actually need
repair. These units are returned “no problem found.” If you have a problem with your
PiranhaMAX, use the following troubleshooting guide before calling the Customer
Resource Center or sending your unit in for repair.
1. Nothing happens when I turn the unit on.
Check the power cable connection at both ends. Be sure the cable is connected
correctly to a reliable power source — red lead to positive, black lead to negative or
ground. Ensure the power available is between 10 and 20 VDC. If the unit is wired
through a fuse panel, ensure the panel is powered. Often accessory fuse panels are
controlled by a separate switch or the ignition switch.
Also, often a fuse can appear to be good when it is not. Check the fuse with a tester or
replace it with a fuse known to be good.
Check the power connection to the PiranhaMAX. It is possible to force the power cable
connector into thecable holder incorrectly. If the connector is reversed,the unit willnot
work. Examine the contacts on the back of the unit to ensure there is no corrosion.
2. There is no transducer detected.
The PiranhaMAX has the ability to detect and identify that a transducer
is connected. When powering on, if a message indicates “transducer not connected”,
makesurethatanappropriatetransducerconnectorispluggedintotheunit.Inaddition,
inspect the transducer cable from end to end for breaks, kinks, or cuts in the outer
casing of the cable. Also make sure that the transducer is fully submerged in water. If
thetransducer isconnected to the unit through a switch, temporarilyconnect it directly
to the unit and try again. If none of these actions identifies an obvious problem, the
transducer itself is probably at fault. Be sure to include the transducer if returning the
unit for repair.
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 yourPiranhaMAX Installation Guidefordetails.Also,in verydeepwater,
it may be necessary to increase the sensitivity setting manually to maintain a graphic
depiction ofthebottom.Ifyouareusingatransducerswitchtoconnecttwotransducers
to the PiranhaMAX, make sure that the switch is in the correct position to connect a
transducerthat isin the water. (If atrolling motor transducer is selectedand thetrolling
motor is outof the water, no sonar informationappears.) If none of these actionssolves
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Troubleshooting