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NAKI8850B

1. Nothing Happens When I turn the Power On

答：

a) Make sure that you have installed a good set of batteries and aligned them as per the diagram within the battery compartment.

b) Make sure that the temperature of the environment is above -10~45degree. When using this product in the cold environment, please make sure that the temperature of the main unit is above certain degree.

2.No Fish Signals

答：

Weak Bottom Echo, Unstable Depth Reading, or No Fish Signals.

a) Make certain the transducer is installed properly.

b) Extremely heavy vegetation may confuse the sonar signal, causing it to misinterpret the depth. If you are certain that the readings are incorrect under these conditions, discontinue use.

c) Oil, dirt and fuel might cause a film to form on the transducer and reduce its effectiveness. Cleaning the face of the sensor might help.

d) Electrical noise from the boat's motor can interferes with the sonar, which will cause some weaker signals being eliminated.

e) Please check the battery voltage. The unit's transmitter power will decrease due to the voltage drop. And this will reduce its ability to find the bottom or targets.

f) The sonar might be in turbulent water. Mounting it in a smooth flow of water might help.

3. No depth readout

答：	No depth readout when transducer is installed in the way “Shoot-thru-hull”. Make certain the hull of the boat is single layer construction.Also any air trapped in the lamination of the fiberglass would prevent the sonar signal passing through, which will cause no depth readout.

Bottom disappears suddenly weakens

答：

Bottom disappears, suddenly weakens, when the boat moves at high speed

a) The sonar might be in turbulent water. See the installation guide and adjust the transducer position to a smooth flow of water.

b) Electrical noise from the boat's motor can interferes with the sonar, which will cause some weaker signals being eliminated. Try increasing the Noise Reject level or routing Fishfinder”s power and the transducer cable away from the electrical source.

5.Nothing appears on the display

答：

Nothing appears on the display even you can see fish under the transducer.

a) Check the transducer installation to make certain it is properly installed. An improper installation may cause sonar signal lost.

b) Oil, dirt and fuel might cause a film to form on the transducer and reduce its effectiveness. Cleaning the surface of the transducer might help.

c) Electrical noise from the boat's motor can interferes with the sonar, which will cause some weaker signals being eliminated.

The display become so cluttered that you even could not achieve a clear bottom such cluttered display maybe caused because:

答：	The display become so cluttered that you even could not achieve a clear bottom such cluttered display maybe caused because: a) The water is too low b) The water is too turbid c) There are so much debris in the water