Autohelm Inboard Autopilots (ST6000 and ST7000 systems) Service ...
Autohelm Inboard Autopilots (ST6000 and ST7000 systems) Service ...
Autohelm Inboard Autopilots (ST6000 and ST7000 systems) Service ...
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<strong>Autohelm</strong>• If the autopilot fails to hold course checkthe Rudder Gain level. Has it been changedfrom the initial sea trials level (check inInstallation Manual)?• If the vessel w<strong>and</strong>ers check that theRudder Reference Transducer linkage issecure with no free play.Hydraulic Drive Units only:-• Check that all unions are tight <strong>and</strong> bleedsystem to remove air.Failure of Drive Unit to DisengageThe mechanical drive actuators of the<strong>ST6000</strong> are designed to fail Safe1 - Whenpower is disconnected the drive unit willdisengage leaving the steering system freefor manual control.When St<strong>and</strong>by is selected the actuator willDisengage leaving the steering free.It is remotely possible that a fault coulddevelop which could cause the actuator toremain engaged even when St<strong>and</strong>by isselected. If this happens:-• DISCONNECT THE MAIN CIRCUITBREAKER TO THE AUTOPILOT - THESTEERING WILL IMMEDIATELY BE FREE,or• IN AN EMERGENCY THE ACTUATORCLUTCH CAN NORMALLY BEOVERRIDDEN BY TURNING THESTEERING WHEEL HARD.It is emphasised that this fault is extremelyunlikely <strong>and</strong> can be immediately correctedas described.If preferred a separate Override switch canbe fitted close to the steering position whichwill break the actuator clutch drive forEmergency Use.Stern Drive Actuator(Manual Override Option)Manual override is selected duringcalibration using the Auto Release option. Itmust only be used on installations fitted withthe stern drive actuator. When it has beenselected, the <strong>ST6000</strong> can be overridden toallow h<strong>and</strong> steering by turning the steeringwheel. This will return the <strong>ST6000</strong> toSt<strong>and</strong>by <strong>and</strong> sound the control unit buzzerfor 10 seconds. There is a slight delaybefore the <strong>ST6000</strong> will return to St<strong>and</strong>by.Excessive force is not required <strong>and</strong> willnot reduce this delay.With the <strong>ST6000</strong> in Auto <strong>and</strong> clear ofobstruction turn the steering wheel toobserve the manual override. Repeat two orthree times until you are confident with itsoperation.The manual override is intended foremergency use only. The <strong>ST6000</strong> shouldnormally be disengaged by pushing theSt<strong>and</strong>by button on the control unit.14SeaTalk <strong>Service</strong> Manual
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