
IS15 General Manual
92
20220760G
Speed and Temperature Display Faults
Condition
Probable Cause
Action
The Boat Speed
display always
shows “----“ and/or
Temperature show –
16°C/36°F.
The speed transducer
is not connected to the
IS15 Transceiver
properly.
Check the speed transducer’s connections
to the IS15 Transceiver.
Check that the speed transducer cable is
not damaged.
Contact your dealer.
The Boat Speed
display always
shows ‘0.0’, but the
Sea Temperature
display is shown.
The speed transducer
is not installed in the
hull fitting.
The speed transducer
is not connected to the
IS15 Transceiver
properly.
Jammed paddle wheel.
Damaged paddle
wheel or transducer
body.
Check, and replace the blanking plug with
the transducer if necessary.
Check the speed transducers connections
to the IS15 Transceiver (especially the Red
and Green ‘Speed’ wires).
Check that the speed transducer cable is
not damaged.
Clean the paddle wheel and transducer as
required.
Check that the paddle wheel and
transducer is not damaged, and that there
are not ‘holes’ at the end of any of the
paddle wheels vanes.
Contact your dealer.