•
If the autopilot fails to hold course check the Rudder
Gain level. Has it been changed from the initial sea
trials level (check in Installation Manual)?
•
If the vessel wanders check that the Rudder
Reference Transducer linkage is secure with no free
play.
Hydraulic Drive Units only:-
•
Check that all unions are tight and bleed system to
remove air.
Failure of Drive Unit to Disengage
The mechanical drive actuators of the ST7000 are
designed to 'Fail Safe' - When power is disconnected
the drive unit will disengage leaving the steering system
free for manual control.
When Standby is selected the actuator will disengage
leaving the steering free.
It is remotely possible that a fault could develop which
could cause the actuator to remain engaged even when
Standby is selected. If this happens:-
•
DISCONNECT THE MAIN CIRCUIT BREAKER TO
THE AUTOPILOT - THE STEERING WILL
IMMEDIATELY BE FREE ,
or
•
IN AN EMERGENCY THE ACTUATOR CLUTCH
CAN NORMALLY BE OVERRIDDEN BY TURNING
THE STEERING WHEEL
HARD.
It is emphasised that this fault is extremely unlikely and
can be immediately corrected as described.
If preferred a separate
Override
switch can be fitted
close to the steering position which will break the
actuator clutch drive for
Emergency
Use.
Stern Drive Actuator
Manual Override Option
When used with a stern drive actuator, the ST7000 can
be set up automatically to release the drive if the
steering wheel is turned in an emergency situation.
After releasing the drive unit the ST7000 will return to
Standby and sound the manual override alarm for 10
seconds.
This feature is selected during autopilot
calibration (see Installation Handbook).
Note:
This feature is for use with a stern drive actuator
only.
Control Unit Display Adjustment
The control unit display is designed to provide good
legibility over a wide range of viewing angles. However,
it is recommended that wherever possible the control
unit is mounted so that the viewing angle is normal to
the lcd display when the helmsman is in the usual
steering position. If the control unit is mounted so that
the usual viewing position is at an angle to the lcd
display, the lcd contrast can be adjusted to improve
legibility.
•
Push
Display
and
Track
together momentarily.
Push
▲
to increase,
▼
to decrease contrast level.
Continue until the display has optimum legibility when
viewed from the usual helming position. Push
Display
and
Track
together momentarily to store the selected
contrast level.
Note:
Increasing the contrast level will suit
installations where the instrument is normally viewed
from below.
13
