Furuno SC-30 Operator's Manual page 20

4. MAINTENANCE, TROUBLESHOOTING
Autopilot jerks suddenly
• Check for interfering objects near the SC-30.
• Check the installation site and mounting base for vibration.
• Check if antenna of radar, radio equipment, etc. is near the installation site.
• Check operation at the autopilot:
• Confirm that the ruddle angle can be recognized by the operator when heading output is
stopped.
Minimally, the buzzer should sound.
• Confirm that rudder does not jerk violently when heading output is resumed. For example,
check that setting for rudder angle limit is suitable.
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