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28 Fishnder 400C Owner’s Manual
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Alarms and Messages
The Fishnder 400C uses an on-screen message system to alert you
to unit operating characteristics. When a message appears, press
SELECT to acknowledge the message and return to the screen you
were viewing.
Battery Alarm
—battery voltage has fallen below the value entered
in the Battery Alarm setup.
Battery Voltage Is Too High
—too much input voltage; the unit
shuts off in 10 seconds. Decrease the input voltage to 35 Volts or
less.
Boat Is Not Moving Fast Enough to Calibrate
—the boat is not
moving fast enough for the speed wheel to provide a valid speed.
Can’t Read Voltages That High, Limited to Top of Range
—the
voltage value in the Battery Alarm setup is higher than the unit can
read.
Can’t Read Voltages That Low, Limited to Bottom of
Range—the voltage value in the Battery Alarm setup is lower than
the voltage where the unit automatically turns off.
Deep Water Alarm—the Deep Water Alarm depth has been
reached.
Drift Alarm—the depth has changed by the amount of the Drift
Alarm value.
Fish Alarm—an icon appears and a beep sounds (if enabled) when a
sh is detected. This alarm does not show a message banner.
Shallow Water Alarm—the Shallow Water Alarm depth has been
reached.
Simulating Operation—the unit is in Simulator Mode.
Sonar Failed, Unit Needs Repair—there is an internal problem
with the shnder. Contact your dealer or Garmin Product Support
to have the unit serviced.
Transducer Disconnected, Sonar Turned Off
—there is not a
transducer attached, bad cable/transducer, or the transducer cable
was disconnected. If the transducer cable is removed while the unit
is on, reconnect and cycle power.
Water Speed Sensor Is Not Working—the speed sensor is not
detected. Check the connections.
Entering (Leaving) target
water temperature—the target water
temperature is 2° F (1.1° C) above or below the temperature
specied by the Water Temperature Alarm. These messages appear
when you enter or leave that zone.