34 ST6001+ Autopilot Control Unit - Owner’s Handbook4 Fault Finding & Maintenance4.1 Fault findingCommon autopilot problemsSYMPTOM CAUSE and SOLUTIONDisplay is blank No power – check the power and SeaTalk fuseson course computer, then check mainfuse/circuit breaker.Display shows stationary dashes The control unit is not receiving data – checkcabling.Display shows rotating dashes Compass correction in progress (see page 64).Displayed compass heading doesnot agree with the boat’s compassYou have not calibrated the compass. Carry outthe deviation and alignment procedures (seepage 64).No display bar on the display Rudder bar switched off in Display Calibration– select RUDD BAR or STEER BARRudder bar display moves inopposite direction to rudderReverse the red and green rudder positionsensor connections at the course computerBoat turns slowly and takes a longtime to come onto courseRudder gain too low (see page 71). CompleteAutoLearn or increase setting.Boat overshoots when turning ontoa new courseRudder gain too high (see page 71). CompleteAutoLearn or decrease setting,The autopilot appears to beunstable in Track mode, ortrack-holding is slowIf tide speed exceeds 35% of boat speed, andboat speed is not available via SeaTalk, changethe Cruise Speed setting in Dealer Calibrationto the boat’s cruising speed (see page 95).The autopilot appears to beunstable on Northerly headings inthe Northern hemisphere (orSoutherly headings in the Southernhemisphere)Northerly/Southerly heading correction(AutoAdapt) is not set up (see page 95). [Doesnot apply to 150G/400G systems.]You cannot enter SeatrialCalibrationSeatrial calibration lock is on – turn off thecalibration protection feature in DealerCalibration (see page 88).The autopilot will not ‘talk’ to otherSeaTalk instrumentsCabling problem – make sure all the cables areconnected properly.Position information not received Navigator not transmitting the correct positiondata.The autopilot will not auto advanceto the next waypointNo bearing to waypoint information receivedfrom the navigator.
