User manual

B&G Hydra & Hercules User Manual
Part 6 - Diagnostic Data
HB-0842
6-6
(3) Set display (Hydra or Hercules) to show digital rudder
angle in degrees. Move helm to Port and Starboard end
stops, check that the indicated rudder angle is 40 degrees
(+/-2). If not, check the rudder reference installation to
determine and rectify the reason for the end stop position
changing and then re-enter the set end stop commissioning
values.
(4) Move helm slowly from end stop to end stop. Check that
indicated rudder angle counts from 40 deg. one side to 40
deg. the other side without "missing" a count.
(5) If the fault is always at the same rudder angle, suspect a
faulty rudder reference unit.
(6) If the fault is at different rudder angles suspect a fault in
the wiring, the connections to the Pilot computer, or the Pilot
computer electronics.
6.2.4 Fault 103 - Rudder Drive
FAULT DESCRIPTION
The Pilot attempted to move the rudder, but did not sense
any change in rudder position
or
When the Pilot attempted to move the rudder, it moved in the
wrong direction.
REMEDY
(1) Is the heavy duty power supply circuit breaker for the
autopilot drive switched on?
(2) Check installation, look for any slack or loose fixings in
the drive system or the rudder reference as the helm is
moved.
(3) Move the helm. Does the rudder indicator work, if not,
check installation of rudder reference unit as detailed above.
(4) Select "Power Steer" mode. If drive system includes a
clutch or solenoid valve, engage the pilot and check the
operation of the clutch or solenoid valve. It should not be