Garmin colorado 400c User Manual

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The Fishfinder 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 

fish 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 fishfinder. 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 

specified by the Water Temperature Alarm. These messages appear 

when you enter or leave that zone.