Sonar Troubleshooting - Raymarine CP370 Installation Instructions Manual

6.4 Sonar troubleshooting

Problems with the sonar and their possible causes and solutions are described here.
Problem
Sonar data not available on
multifunction display.
Problematic depth readings or
sonar image.
Incorrect speed reading
38
Possible causes
Unit power supply fault.
Other unit fault.
SeaTalk hs / RayNet network
problem.
Software mismatch between
equipment may prevent
communication.
Gain or Frequency settings may
be inappropriate for present
conditions.
Unit power supply fault
Unit cable fault.
Transducer fault
Other unit fault.
Vessel stationary
High vessel speed
Scroll speed set to zero
Paddle wheel fault
No speed offset set
Incorrect calibration
Possible solutions
Check the unit power supply and cables.
Refer to the instructions supplied with the unit.
Check that the unit is correctly connected to a Raymarine
network SeaTalk hs switch or crossover coupler (as
applicable).
Check the status of the Raymarine network switch (if
applicable).
Check that SeaTalk hs / RayNet cables are free from
damage.
Contact Raymarine technical support.
Check the sonar presets, gain and frequency settings.
Check the voltage from the power supply, if this is too low
it can affect the transmitting power of the unit.
Ensure that the power, transducer and all other cables to
the unit are properly connected and free from damage.
Check that the transducer is mounted correctly and is
clean.
If you have a transom-mount transducer, check that the
transducer hasn't kicked up due to hitting an object.
Refer to the instructions supplied with the unit.
Fish arches are not displayed if the vessel is stationary,
fish will appear on the display as straight lines.
Turbulence around the transducer may be confusing the
unit.
Adjust scroll speed
Check that the paddle wheel is clean.
Add speed offset.
Re-calibrate equipment
CP370 / CP470