What to do if Furuno Marine Radar displays 'Low Voltage! Internal Battery'?
- SStacy AlvarezAug 22, 2025
If your Furuno Marine Radar indicates 'Low Voltage! Internal Battery', have a qualified technician replace the battery.
What to do if Furuno Marine Radar displays 'Low Voltage! Internal Battery'?
If your Furuno Marine Radar indicates 'Low Voltage! Internal Battery', have a qualified technician replace the battery.
What to do if Furuno 1722C Marine Radar display is blank?
If you pressed the [POWER/BRILL] key and the RADAR TX soft key to show the radar picture and nothing appears on the display of your Furuno Marine Radar, check that the signal cable between the display unit and the antenna is firmly fastened and that the radar source is correct.
Why is the bearing wrong on my Furuno Marine Radar?
If the Furuno Marine Radar bearing is wrong, check that the correct magnetic variation is entered on the GENERAL SETUP menu.
Why is Furuno Marine Radar position not fixed within three minutes?
If the Furuno Marine Radar position is not fixed within three minutes, check that the antenna connector is firmly fastened or check the satellites numbers received, on the GPS status display (GPS SENSOR SETTINGS menu, GPS STATUS key see page 7-11).
What to do if no sounder display appears on Furuno 1722C?
If you selected a sounder display with the DISP key but no sounder display appears on your Furuno Marine Radar, check that the signal cable between the network sounder and this equipment is firmly fastened, check that the network sounder is plugged in (the LED of the network sounder should flash every second), and verify that the sounder source is correct.
How to turn on Furuno Marine Radar if it does not power on?
If you cannot turn on the power of your Furuno Marine Radar, check for a blown fuse, ensure the power connector is firmly fastened, inspect for corrosion on the power cable connector, check for a damaged power cable, and verify the battery has proper voltage output (10.8 to 31.2 V).
How to fix Furuno 1722C picture if it is not updated or freezes?
If the picture is not updated or freezes on your Furuno Marine Radar, check the signal cable or turn the display unit off and on again.
Why is depth not displayed on my Furuno Marine Radar?
If the Furuno Marine Radar depth is not displayed, adjust gain to display the bottom echo (in reddish brown on the color model), if you are using the manual sounder mode or correctly display bottom echo on the display, if you are using manual sounder mode.
Why is my Furuno 1722C position wrong?
If your Furuno Marine Radar position is wrong, check that the correct geodetic chart system is selected in the GPS SENSOR SETTINGS menu or enter position offset on the GPS SENSOR SETTINGS menu.
Brand | Furuno |
---|---|
Model | 1722C |
Category | Marine Radar |
Language | English |
Covers the main controls of the display unit and remote controller for radar operation.
Procedures for switching the radar between transmit and stand-by states.
Covers automatic and manual methods for tuning the radar receiver for optimal performance.
Details on adjusting receiver sensitivity to optimize echo visibility and reduce noise.
Explains how to use A/C SEA to reduce unwanted echoes from waves.
Covers adjusting A/C RAIN and FTC to mitigate clutter from rain or snow.
Explains the four radar presentation modes: Head-up, Course-up, North-up, True Motion.
Details methods for measuring target range using range rings, cursor, and VRM.
Explains how to measure target bearing using the cursor and EBL.
Procedures for reducing random 'speckles' or noise on the radar display.
Methods for reducing interference from other shipborne radars.
Details on using the offset EBL for collision course prediction and range/bearing measurement.
Covers setting and managing guard zones for proximity alarms.
Explains the watchman function for periodic radar checks and alerts.
Covers automatic target tracking, acquisition, and data display with ARP/TTM.
Describes the three plotter presentation modes: North-up, Course-up, and Auto Course-up.
Covers displaying, stopping, restarting, changing color, interval, and erasing ship tracks.
Covers entering, editing, erasing, changing size, and searching for waypoints.
Detailed procedures for creating, connecting, inserting, removing, and erasing routes.
Covers navigating to quick points, waypoints, ports, port services, and following routes.
Details on setting and managing various plotter alarms like Arrival, Anchor Watch, XTE, Speed, and Proximity.
Covers marking Man Overboard (MOB) positions and setting them as destinations.
Explains automatic adjustment of gain, range, and clutter suppression for cruising and fishing.
Details setup for sounder alarms: audio, bottom, fish, temperature, and when alarms are violated.
Regular maintenance tasks for optimal performance, including cleaning and connection checks.
Procedures for replacing fuses and batteries to ensure equipment functionality.
Provides solutions for common issues related to power, response, radar, plotter, and sounder.
Includes Memory I/O, Keyboard, Remote Controller, and Test Pattern diagnostic procedures.
Steps to clear unit memories and restore default settings for display, GPS, and sounder.
Lists common error messages and their corresponding remedies for troubleshooting.