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34 ST4000+ Wheel & Tiller Autopilots: Owner’s Handbook
4 Maintenance & Fault Finding
4.1 Fault finding
All Raymarine products are designed to provide many years of
trouble-free operation. We also put them through comprehensive
testing and quality assurance procedures before shipping.
In the unlikely event that a fault does occur with your autopilot, use
the following table to help identify the problem and provide a
solution.
If you cannot resolve the problem yourself, refer to the product
support information on page 40.
SYMPTOM SOLUTION
The control unit display is
blank
No power – check the fuse/circuit
breaker.
The displayed compass
heading does not agree with
the boat’s compass
You have not corrected the compass
for deviation – carry out the
deviation and alignment procedures
(see page 92 and page 95).
Boat turns slowly and takes a
long time to come onto course
Rudder gain too low (see page 96).
Boat overshoots when
turning onto a new course
Rudder gain too high (see page 96).
The autopilot appears to be
unstable in Track mode, or
track-holding is slow
If tide speed exceeds 35% of boat
speed, and boat speed is not
available via SeaTalk, change the
Cruise Speed setting in Dealer Setup
to the boat’s cruising speed (see
page 112).
The autopilot appears to be
unstable on Northerly
headings in the Northern
hemisphere and Southerly
headings in the Southern
hemisphere
Northerly/Southerly heading
correction (AutoAdapt) is not set up
(see page 111).
Display shows CAL LOCK when
entering calibration
Calibration lock is on – turn off the
calibration protection feature is in
Dealer setup (see page 108).