Specifications

Fault Finding
20220760L 111
Condition Probable Cause Action
The Boat Speed is
too low, when it was
previously correct.
Dirty paddle wheel or
hull.
Damaged paddle
wheel or transducer
body.
The paddle wheel is
not aligned fore / aft
within the skin fitting.
Clean the paddle wheel and / or the hull 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.
Check, and if necessary turn the transducer
within the skin fitting so that the cross pin
is aligned with the centre line of the vessel.
Make other checks as for ‘always showing
0.0’ above.
The Boat Speed has
always been too low
or too high.
The speed transducer
is not calibrated.
Calibrate the speed transducer. (Using
another instrument.)
Make other checks as for ‘the speed is too
low when it was previously correct’ above.
The Boat Speed is
different on each
tack.
The hull form and
transducer siting
produces different
water flow rates over
the paddle wheel on
each tack.
Turn the speed transducer slightly so that
the cross pin is not aligned directly fore /
aft, and recheck for the same speed display
on both tacks. Repeat this until the correct
angle is found for the same reading on
each tack, and then recalibrate the
transducer. (Using another instrument.)
The Sea Tempera-
ture display is
incorrect, showing –
degrees (-16°C).
The speed transducer
is not connected to the
IS15 Transceiver
properly.
Check the speed transducer connection to
the IS15 Transceiver (especially the
Brown, White and shield “Temp” wires).
Check that the speed transducer cable is
not damaged.
Check that the Sea Temperature is in fact
incorrect by comparing with another
temperature sensor.
Contact your dealer.