Garmin GHP 12 Autopilot System Installation Instructions - Page 19

• If you have a powerboat, select an option: ◦◦ Select Low Speed or High Speed and use the arrows on the GHC 20 to adjust how tightly the rudder holds the heading and makes turns at low speed or high speed. If you set this value too high, the autopilot may be overactive, attempting to constantly adjust the heading at the slightest deviation. An overactive autopilot can cause excess wear and tear on the drive unit, and drains the battery at a faster-than-normal rate. ◦◦ Select Low Speed Counter or High Speed Counter to adjust how tightly the rudder corrects the turn overshoot. If you set this value too high, the autopilot can overshoot the turn again when attempting to counter the original turn. 4. Test the autopilot configuration, and repeat steps 2 and 3 until the GHP 12 performance is satisfactory. Reducing the Risk of ECU Drive Circuit Overload This applies only when the GHP 12 is installed on a power boat. If you receive an "Error: ECU Drive Circuit Overload. See manual for tips on reducing load error" message, use these tips to help reduce the load: • Ensure the appropriate pump has been correctly installed on your boat. • If possible, use larger inside diameter hydraulic hoses on your steering system. • Mount the pump closer to the cylinder to limit the length of the hose runs. • Eliminate unneeded hydraulic fittings in the hydraulic system. • If overloading occurs during the autotune procedure, skip the procedure and manually tune the autopilot. • Increase the rudder rate limiter setting to slow the fluid rate. • Reduce rudder gain to limit pump activity. Adjusting the Rudder Rate Limiter This applies only when the GHP 12 is installed on a power boat. If the "ECU Drive Circuit Overload. See manual for tips on reducing load error" message continues to appear, you may need to adjust the rudder rate limiter. NOTE: Complete rudder rate adjustments only at the dock or while your boat is not moving. NOTE: If you adjust the rudder rate limiter, you must perform the autotune procedure. 1. Enable the advanced configuration procedure (page 19). 2. On the GHC 20, select Menu > Setup > Dealer Autopilot Configuration > Autopilot Tuning > Rudder Rate Limiter. 3. Select Continue. Autopilot takes control of the rudder. 4. Use the arrows on the GHC 20 to adjust the speed of the limiter. • 0% is the is the default speed for the rudder rate limiter. • Lower rudder rate limiter numbers allow the rudder to move faster between the right rail and left rail. • Lower rudder rate limiter numbers increase the running current. • Higher rudder rate limiter numbers decrease the running current. 5. Select Done. 6. Test the rudder rate limiter settings. 7. Repeat steps 2-6 until rudder rate limiter performance is satisfactory. 8. Perform the autotune procedure. Advanced Configuration Advanced configuration options are not available on the GHC 20 under normal conditions. To access the advanced configuration settings of the GHP 12, enable Dealer Mode. Enabling Dealer Autopilot Configuration 1. From the heading screen, select Menu > Setup > System > System Information. 2. Press and hold the center soft key ➊ for 5 seconds. Dealer Mode appears. ➊ 3. Press Back > Back. If the option for Dealer Autopilot Configuration is available on the Setup screen, the procedure was successful. Advanced Configuration Settings You can run the Autotune automated configuration process, calibrate the compass, and define north on the GHP 12 through the GHC 20 without running the wizards. You can also define each setting individually, without running the configuration processes. Manually Running the Automated Configuration Procedures 1. Enable Dealer Mode (page 19). 2. From the Heading screen, select Menu > Setup > Dealer Autopilot Configuration > Automated Setup. 3. Select Autotune, Calibrate Compass, or Set North. 4. Follow the on-screen instructions (page 15). Manually Defining Individual Configuration Settings 1. Enable Dealer Mode (page 19). 2. From the Heading screen, select Menu > Setup > Dealer Autopilot Configuration. 3. Select the a setting category. 4. Select a setting to configure. Descriptions of each setting are available in the appendix (page 25). 5. Configure the value of the setting. NOTE: Configuring certain settings in the advanced configuration procedure may require you to modify other settings. Review the GHP 12 Configurations Settings section (page 25) prior to modifying any settings. GHP 12 Installation Instructions 19