28 ST4000+ Wheel & Tiller Autopilots: Owner’s Handbook
4 Maintenance & Fault Finding
4.2 General maintenance
CAUTION:
The control unit, fluxgate compass, tiller drive and rudder
position sensor do not contain any user serviceable parts. These
products should be serviced only by authorized Raymarine
service technicians.
Wheel drive
Routine maintenance
After each trip, flush inside the drive unit by inserting a hose pipe
in the free slot on the back cover.
The autopilot will not ‘talk’ to other
SeaTalk instruments
Cabling problem – make sure all the cables are
connected properly.
Position information not received Navigator not transmitting the correct position
data.
The autopilot will not auto advance to
the next waypoint
No bearing to waypoint information received
from the navigator.
The control unit display shows a series
of rotating dashes
Compass deviation correction is running (see
page 81
).
The control unit display shows a series
of stationary dashes
The control unit is not receiving data – check the
cabling.
The control unit display shows NO DATA The signals received by the navigator are too
weak for reliable navigation – refer to the
navigator handbook for further action.
OR
Wind trim data is not available – check the
connection to the wind instrument.
Wheel drive: drive belt slips in Auto
mode (motor operates but drive does
not turn wheel)
Tighten the clutch – see
page 29
.
Wheel drive: drive belt drags in
Standby mode
Loosen the clutch – see
page 29
.
SYMPTOM SOLUTION
81131_7.book Page 28 Wednesday, March 17, 2004 3:59 PM
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