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Symptom
Unit will not turn on.
Unit is turned on, but there is no
display.
Unit runs well for a short time,
then the unit quits.
Unit runs and shows display
light, but does not read depth.
Unit works, but needs high gain
to see bottom or targets.
Unit works, but has too many
lines on the display. Can't tell
what is what.
Unit works well when sitting
still or at slow trolling speeds,
but loses reading when the boat
speeds up.
Unit works, but shows noise
when the engine is started or the
electric trolling motor is turned
on.
Unit does not save settings in
memory. Does not sound normal
beeps when turned on.
TROUBLE SHOOTING
Possible Cause
Check for proper battery polar-
ity and that you have fully
charged, working batteries.
Battery voltage may be too low.
The unit will show no display if
the voltage is below 8.5 volts.
Bad battery. Voltage may be
good when checked, but may
fall as it is loaded.
Transducer is not plugged in or
not in contact with the water.
Transducer is not aimed cor-
rectly or needs to be cleaned.
Many air bubbles or very small
targets in the water.
Improper transducer installation
or adjustment. There is a loss of
clear water flow across the face
of the transducer when the boat
reaches a certain speed.
Improper ground or missing
ground in electrical system.
Defective engine or trolling
motor.
Internal lithium battery is dead.
Replace with new. Common
number is CR2032.
27
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