Chapter 3: Fault Finding & Maintenance 27Chapter 3: Fault Finding & MaintenanceAll Raymarine products are designed to provide many years of trouble-freeoperation. We also put them through comprehensive testing and qualityassurance procedures before shipping.This chapter provides information about identifying problems, interpretingalarm messages, maintaining your SmartPilot and obtaining productsupport.If a fault occurs with your SmartPilot, use the fault finding tables in thissection to help identify the problem and provide a solution.If you cannotresolve the problem yourself, refer to the product support information.3.1 Fault findingSYMPTOM POSSIBLE CAUSE and SOLUTIONDisplay is blank No power – check the power and SeaTalk fuses oncourse computer, then check main fuse/circuit breaker.Data page display shows sta-tionary dashesThe control unit is not receiving necessary data fromother instruments – check cabling.Display shows rotating dashes Compass calibration in progress (see SmartPilot Com-missioning Guide).Displayed compass headingdoes not agree with the boat’scompassYou have not calibrated the compass. Carry out the devi-ation and alignment procedures (see SmartPilot Com-missioning Guide).No display bar on the display Rudder bar switched off in Display Calibration – selectRUDD BAR or STEER BARRudder bar display moves inopposite direction to rudderReverse the red and green rudder position sensor con-nections at the course computerBoat turns slowly and takes along time to come onto courseRudder gain too low. Complete AutoLearn or increasegain setting.Boat overshoots when turningonto a new courseRudder gain too high. Complete AutoLearn or decreasegain setting.The SmartPilot ‘hunts’ whentrying to position the rudderAdjust the RUDD DAMP setting (see SmartPilot Commis-sioning Guide). Increase the damping one level at a timeuntil the autopilot stops hunting, and always use thelowest acceptable value