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Troubleshooting
5. When no noise appears on the sonar unit after all of the
above tests, then the noise source is probably cavitation.
Many people make sonar installations which function per-
fectly in shallow water, or when the boat is at rest. In most
cases, the cause of the malfunction is the location and/or
angle of the transducer. The face of the transducer must be
placed in a location that has a smooth ow of water at all
boat speeds. Read your transducer owner’s manual or the
Installation instructions in this manual for the best mounting
position.
Make sure your unit has the latest software version. Go to the Software
Update page on Lowrance.com. You can download updates for free.
Sometimes resetting your unit can solve unusual issues. Go to Lowrance.
com to access a list of reset procedures for Lowrance products. Locate the
one that applies to the model you own. Try a Soft Reset rst, this will return
your settings to factory defaults. If you decide to try a Hard Reset, save
any important stored data to an MMC or SD card or write the information
down. The data will be deleted during this process.
If the radar, does not start up, try the following steps:
1. Verify head unit has the latest code that supports radar.
2. Verify that the communication port is set to RADAR
3. Turn the unit, radar and network off, then turn everything
back on. On power up the Radar should start initializing.
Change over to the Radar Page and see if the unit is initial-
izing or giving the count down indication.
a. If you are getting a countdown: allow it to complete and
then try to power on the Radar. If the Radar does not
start rotating then the Radar will need to be sent in for
service.
Reset the Unit
Update the Software
Radar won’t Start Up