Simrad SH90 - PRODUCT DESCRIPTION REV A Specifications Page 114

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IS15 General Manual
112 20220760L
Heading and Autopilot Display Faults
Condition Probable Cause Action
There are no
Heading or Wind
Direction displays.
The required data is
not being received
from the Fluxgate
Compass or Autopilot.
If it is a non Simrad compass, check the
NMEA output compass specification
against the IS15 input specification. (Ref.
Table).
Check the compass power supply wiring.
Check the signal wiring from the compass
to the IS15 Instrument head.
Check that the compass is driving other
instrument head correctly.
Contact your dealer.
All Headings are
incorrect, by the
same amount.
Note :
When checking a
Compass ensure that
the check is against a
deviated magnetic
card compass, or
against magnetic
bearings, or against a
good hand held
compass held well
away from any
magnetic or ferrous
objects.
The compass is not
aligned correctly.
See manual for Compass calibration and
Heading offset.
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