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turbulence in the transducer location caused by rivets, ribs, etc.
7. My unit loses power at high speeds.
Your Pro Craft unit has over-voltage protection that turns the unit off when
input voltage exceeds 20 VDC. Some outboard motors do not effectively regu-
late the power output of the engine’s alternator and can produce voltage in
excess of 20 volts when running at high RPMs. The Pro Craft unit displays input
voltage in the Diagnostic screen. Use this readout to determine if the voltage
exceeds 20 VDC.
8. The screen begins to fade out. Images are not as sharp as normal.
Check the input voltage using Diagnostic. The Pro Craft unit will not operate on
input voltages below 10 VDC.
9. The display shows many black dots at high speeds and high sensi-
tivity settings.
You are seeing noise or interference caused by one of several sources.
Noise can be caused by other electronic devices. Turn off any nearby elec-
tronics and see if the problem goes away. Noise can also be caused by the
engine. If engine noise is causing the interference, the problem will inten-
sify at higher RPMs. Increase the engine speed with the boat stationary to
isolate this cause. Propeller cavitation can appear as noise on-screen. If the
transducer is mounted too close to the propeller, the turbulence generated
can interfere with the sonar signal. Ensure that the transducer is mounted
at least 15" (38cm) from the prop.
HUMMINBIRD ONE YEAR FULL WARRANTY
First year repairs (from original date of purchase) on your Pro Craft unit are
absolutely free. This does not include physical damage to the unit or its
accessory items. Any modification or attempt to repair the original equip-
ment or accessories by unauthorized individuals will void the warranty.
Return the warranty registration card and retain your bill of sale for war-
ranty verification. Accessories not manufactured under the Humminbird
MAINTENANCE AND WARRANTY
TROUBLESHOOTING/WARRANTY
