36
Troubleshooting
Fault: Cause and correction:
- No depth sounder function - Check electrical connections per
wiring diagram.
- Check supply voltage, 10.8 ... 32 VDC.
- Check fuses in fuse box.
- Wrong indication - Check display unit selection.
- Check keel depth setting.
- Display shows three bars - No ground echo is received or eva-
luated correctly.
- Check installation instructions for
echo sounder.
- Display shows - Bad connection between sounder
and display, Check the connections.
The following causes may be the reason for a ground echo not being re-
ceived or evaluated correctly:
-The maximum measuring range of 120 m is exceeded.
-The ground has a dense growth (seaweed).
-The ground is deep morasses.
-The water is severely polluted.
-Water layers of differring salt content or temperature, for instance
in estuaries or sewage treatment plant outflows.
-Fish or fish shoals.
-The water contains air caused by preceding ships or by backing
your own boat.
-Strong electromagnetic disturbances, for instance by refrigerator,
motor, radio equipment, etc. .
TROUBLESHOOTING
echo_e.qxd 16.04.1998 08:19 Seite 12
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