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Trouble shooting
20169223D
6-1
6 TROUBLE
SHOOTING
6.1 Fault
warnings
The following fault warnings may be shown on the information
display:
OUT OF COURSE
RESET ALARM
Course deviation greater than selected off course alarm limit. The
alarm is automatically reset when the vessel is back within the limit
or cancelled by pressing Alarm reset button.
The following conditions may cause the alarm:
a.
Low speed on vessel (slow acting response).
b.
Extreme sea conditions (following sea).
c.
Improper compass adjustment of magnetic compass when selected
as Main Compass.
Readjustment of the autopilot (Weather, Rudder, Counter Rudder) to
improve steering performance may cure the problem. Otherwise the
off course limit should be adjusted.
This fault warning may also appear due to intermittent fault on the
compass signal (open connection).
RUDDER FEEDBACK
FAIL!
Indicates that the autopilot is not reading any rudder feedback signal.
By pressing the alarm reset button, the audible alarm will be disabled
and the autopilot will switch to a simulated signal, instead of the real.
This is indicated by a flashing
* * SIM * *
on the information display.
The autopilot will continue to steer the set course, but the steering
performance is normally somewhat reduced.
The alarm is probably caused by one of the following reasons and
should be checked in the following sequence:
a.
Open wire in feedback cable.
b.
Defective feedback unit.
c.
Defective input circuit in control unit.
When the fault is rectified, the autopilot will automatically disable
the simulated rudder angle signal.
Summary of Contents for Robertson AP9 Mk3
Page 1: ...INSTRUCTION MANUAL Robertson AP9 Mk3 Autopilot 20169223...
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Page 104: ...Robertson AP9 Mk3 Autopilot 5 14 20169223D Fig 5 16 Bus cable P N 23602857 connection...
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Page 185: ...Drawings 20169223D 8 9 Fig 8 8 FU9X Circuit Diagram N3 360308C...
Page 187: ...Drawings 20169223D 8 11 Fig 8 10 D9X Interconnection Board Circuit Diagram Drw No N3 012813B...
Page 189: ...Drawings 20169223D 8 13 Fig 8 12 D9X Dual Analogue Board Circuit Diagram Drw No N1 012816E...
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Page 195: ...Appendix 20169223D 10 1 10 APPENDIX Appendix A Approvals...
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