Raymarine DownVision CPT-70 Installation Instructions Manual page 39

Sonar troubleshooting
Problems with the sonar and their possible causes and solutions are described here.
Problem
Sonar data not available on
multifunction display.
Problematic data readings.
Note: Not all transducers
and / or sonar modules
support the detection of depth,
range and temperature. For
more information, refer to
the latest specifications and
documentation available
for your particular products
on the Raymarine website
(www.raymarine.com).
Resetting the sonar module
You can use the reset function on a compatible
Raymarine multifunction display to restore the sonar
module to its factory default settings.
In the fishfinder application:
1. Select Menu.
2. Select Set-up.
3. Select Sounder Set-up.
4. Select Sonar Reset.
5. Select Yes to confirm or No to abort the operation,
as appropriate.
The unit will now be reset to factory default settings.
Troubleshooting
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
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 switch. If a crossover coupler or other coupler
cable / adapter is used, check all connections (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 the scroll speed.
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