FLS 3D Manual Version 1 Daniamant A/S 15
7. Fault Finding
Some Common Faults
Display doesn’t switch on (no display):
· Battery not connected
· Battery voltage too low
My 3D has no coms. (red cross):
· Check that the coms port is set to com1 (within menu)
· Check power to the transducer interface
· Check com cable
Poor seabed picture or excessive noise:
· Suitable range not selected (try to fill screen with seabed)
· Poor connection of transducer
· Battery voltage low - use Test Mode to check Tx voltage
· Transducer mounted at an angle
· Turbulence at transducer location
· Interference from other 200KHz sounders (same boat or other boats)
· Turbulence/wake from other boats
· Polluted water or Plankton bloom (usually early summer)
· Dirty transducer/covered with barnacles
· Choppy sea state - can cause surface noise
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