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Error Message

Cause

Autopilot Action

Lost Wind Data 
(sailboat only)

The autopilot is no longer 
receiving valid wind data.

• Alarm sounds for 

5 seconds

• Autopilot 

transitions to 
heading hold

Low GHC

 Supply 

Voltage

The supply voltage level 
has fallen below the value 
specified in the low voltage 
alarm menu.

N/A

Error: ECU High 
Voltage

The pump supply voltage 
has risen above 33.5 Vdc.

• Alarm sounds for 

5 seconds

• The ECU shuts 

down

Error: ECU Voltage 
has Dropped Rapidly

The ECU voltage has 
dropped quickly below 
7.0 Vdc.

• Alarm sounds for 

5 seconds

• The error is 

cleared when the 
ECU voltage 
rises above 
7.3 Vdc.

Error: ECU High 
Temperature

The ECU temperature has 
risen above 100°C 
(212°F ).

• Alarm sounds for 

5 seconds

• The ECU shuts 

down

Error: Lost 
Communication 
Between ECU and 
CCU (when the 
autopilot is engaged)

Communication between 
the CCU and the pump 
has timed out.

• The helm control 

beeps, and 
autopilot 
transitions to 
standby.

Detailed Configuration Settings

Although all of the configuration is typically completed 

automatically through wizards, you can manually adjust any 

setting to fine-tune the autopilot.
Advanced configuration settings are available only when using 

Dealer Mode (

Enabling Dealer Configuration

). User-specific 

settings are available during normal operation of the autopilot. 

See the configuration section of the owner's manual provided 

with the autopilot for more information.

NOTE: 

Depending upon the configuration of the autopilot, 

certain settings may not appear.

NOTE: 

On a powerboat, each time you change to the Speed 

Source setting, you must review the Verify Tachometer, Low 

RPM Limit, High RPM Limit, Planing RPM, Planing Speed, or 

Max. Speed settings, where applicable, before performing the 

autotune procedure (

Performing the Autotune Procedure

).

Autopilot Tuning Settings

To open the general autopilot tuning settings, select 

Menu

 > 

Setup

 > 

Dealer Autopilot Configuration

.

Acceleration Limiter

: Allows you to limit the speed of autopilot-

controlled turns. You can increase the percentage to limit the 

turn rate, and decrease the percentage to allow higher turn 

rates.

Speed Source Settings

NOTE: 

Speed source settings are available only for power 

boats.
To open the speed source settings, select 

Menu

 > 

Setup

 > 

Dealer Autopilot Configuration

 > 

Speed Source Setup

.

Speed Source

: Allows you to select the speed source.

Verify Tachometer

: Allows you to compare the RPM readings 

on the helm control with the tachometers on the dashboard of 

your boat.

Planing RPM

: Allows you to adjust the RPM reading on the 

helm control at the point when your boat transitions from 

displacement to planing speed. If the value does not match 

the value on the helm control, you can adjust the value.

Planing Speed

: Allows you to adjust the planing speed of your 

boat. If the value does not match the value on the helm 

control, you can adjust the value.

Low RPM Limit

: Allows you to adjust the lowest RPM point of 

your boat. If the value does not match the value on the helm 

control, you can adjust the value.

High RPM Limit

: Allows you to adjust the highest RPM point of 

your boat. If the value does not match the value on the helm 

control, you can adjust the value.

Max. Speed

: Allows you to adjust the maximum speed of your 

boat. If the value does not match the value on the helm 

control, you can adjust the value.

Rudder Gain Settings

NOTE: 

If you set these values too high or too low, the autopilot 

may become overactive, attempting to constantly adjust the 

heading at the slightest deviation. An overactive autopilot can 

cause excess wear on the pump, and drain the battery at a 

faster-than-normal rate.
To open the rudder gain settings, select 

Menu

 > 

Setup

 > 

Dealer 

Autopilot Configuration

 > 

Rudder Gains

.

NOTE: 

These settings apply only to sailboats, displacement-hull 

powerboats, and powerboats with the speed source set to None.

Gain

: Allows you to adjust how tightly the rudder holds a 

heading and makes turns.

Counter Gain

: Allows you to adjust how tightly the rudder 

corrects turn overshoot. If you set this value too low, the 

autopilot can overshoot a turn when attempting to counter the 

original turn.

NOTE: 

These settings apply only to planing-hull powerboats 

with the speed source set to Tach - N2K or Proprietary or GPS.

Allows you to set the rudder gain for low speeds. This setting 

applies to the vessel when operating below planing speed.

Low Speed Counter

: Allows you to set the rudder gain counter-

correction for low speeds. This setting applies to the vessel 

when operating below planing speed.

High Speed

: Allows you to set the rudder gain for high speeds. 

This setting applies to the vessel when operating above 

planing speed.

High Speed Counter

: Allows you to set the rudder gain counter-

correction for high speeds. This setting applies to the vessel 

when operating above planing speed.

Steering System Settings

To open the steering system settings, select 

Menu

 > 

Setup

 > 

Dealer Autopilot Configuration

 > 

Steering System Setup

.

Verify Steering Dir.

: Allows you to set the direction the rudder 

must move to turn the vessel to port and to starboard. You 

can test and reverse the steering direction if necessary.

Rudder Sensor Settings

NOTE: 

Rudder sensor settings apply only when a rudder sensor 

is connected to the autopilot system.
To open the rudder sensor settings, select 

Menu

 > 

Setup

 > 

Dealer Autopilot Configuration

 > 

Steering System Setup

 > 

Rudder Sensor Setup

.

Max. Port Angle

: Allows you to enter the angle at which your 

rudder turns furthest port.

Max. Starboard Angle

: Allows you to enter the angle at which 

your rudder turns furthest starboard.

Calibrate Rudder Sensor

: Initiates a procedure that establishes 

the maximum range of movement of the rudder and 

calibrates the rudder-position sensor. If an error appears 

during the calibration, the rudder-position sensor has likely 

reached its limit. The sensor might not be correctly installed. 

If the problem persists, you can bypass this error by moving 

15

Summary of Contents for GHP Reactor Mechanical

Page 1: ...bing and a heat gun Marine sealant Portable or handheld compass to test for magnetic interference Anti seize lubricant optional NOTE Mounting screws are provided for the main components of the autopilot system If the provided screws are not appropriate for the mounting surface you must provide the correct types of screws Mounting and Connection Considerations The autopilot components connect to ea...

Page 2: ...ive unit cannot be extended The ECU must be mounted in a location where it will not be submerged or exposed to wash down The ECU power cable connects to the boat battery and it can be extended if needed Power Cable Extensions Drive Unit Mounting and Wiring Considerations If a compatible drive unit is not already installed on your boat the drive unit is sold separately and must be installed by an e...

Page 3: ...oid Drive Unit If you are using the autopilot with a drive unit not sold by Garmin or a solenoid drive unit you must also install a Garmin rudder feedback sensor recommended or connect to an existing rudder feedback sensor using a rudder feedback cable sold separately Drive Unit Installation Alarm The alarm provides audible alerts from the autopilot system and should be installed near the helm con...

Page 4: ...ol into the cutout 13Securely fasten the helm control to the mounting surface using the supplied screws If you are mounting the helm control in fiberglass you should use an anti seize lubricant as advised in the notice 14Snap the decorative bezel À into place Mounting the CCU 1 Determine the mounting location 2 Using the CCU as a template mark the two pilot hole locations on the mounting surface 3...

Page 5: ...ade Connecting to an Existing Drive Unit You must install a drive unit power cable to use a drive unit not sold by Garmin with the GHP Reactor Mechanical autopilot This cable is sold separately These instructions do not apply to a solenoid type drive unit Connecting to a Solenoid Drive Unit 1 If necessary use the installation instructions provided with the drive unit to install it on your boat 2 I...

Page 6: ...eedback cable not included to your drive unit based on the wire colors and functions in the table If necessary the cable can be extended using 22 AWG 0 33 mm2 wire Wire Color Function Red Rudder feedback positive Black Rudder feedback negative Yellow Rudder feedback wiper 5 Connect the rudder feedback cable to the ECU Connecting the CCU 1 Route the connector end of the CCU cable to the ECU and mak...

Page 7: ...d the T connector 7 Repeat steps 2 through 6 for the CCU Connecting Optional Devices to the Autopilot System You can use advanced features of the autopilot system by connecting optional NMEA 2000 compatible devices such as a wind sensor a water speed sensor or a GPS device to the NMEA 2000 network You can connect optional devices that are not NMEA 2000 compatible to the helm control through NMEA 0...

Page 8: ...ntrol of the rudder 4 Without touching the rudder or helm control allow the autopilot to calibrate the rudder 5 Select an option If the calibration did not complete successfully repeat steps 1 through 4 If the calibration completed successfully select OK Enabling the Shadow Drive If you installed the autopilot on a boat with a hydraulic steering system you can install a Garmin Shadow Drive valve s...

Page 9: ...ght line If you are performing this procedure outside of the Sea Trial Wizard from the heading screen select Menu Setup Dealer Autopilot Configuration Automated Setup Calibrate Compass Begin 2 Follow the directions on the helm control until calibration is complete taking care to keep the boat as steady and flat as possible The boat should not list during calibration 3 Select an option If the calib...

Page 10: ...ing until it matches north on the magnetic compass 3 After the fine heading setting matches north on the magnetic compass select Done Testing and Adjusting the Configuration NOTICE Test the autopilot at a slow speed After the autopilot has been tested and adjusted at a slow speed test it at a higher speed to simulate normal operating conditions 1 Drive the boat in one direction with the autopilot ...

Page 11: ...Dealer Autopilot Configuration Steering System Setup Drive Unit Class 3 Select Other or Solenoid according to the setting chosen in the Dockside Wizard 4 Select an option Select Generic Tune to re run the tuning procedure you completed during the Dockside Wizard Tuning an Existing Drive Unit Select Drive Unit Voltage to adjust the drive unit voltage according to the specifications provided by your...

Page 12: ...ive Unit Class 2 Select Other or Solenoid according to your selection in the Dockside Wizard 3 Select Advanced Tuning Tune Error Tolerance 4 Center the rudder position let go of the rudder control and select Begin 5 Select Tune The rudder position moves from 5 to 5 each time you select Tune and the drive unit steers the rudder accordingly 6 After the drive unit stops observe the Rudder Error and P...

Page 13: ...ire Rx A from the helm control and the green wire Rx B from the helm control must be connected to NMEA 0183 ground À NMEA 2000 network provides power to the helm control Á 12 Vdc power source  Helm control à NMEA 0183 compatible device Wire Helm Control Wire Color Function NMEA 0183 Compatible Device Wire Function Ê N A Power Ë Green Rx B connect to NMEA 0183 ground NMEA 0183 ground Ì Blue Tx A R...

Page 14: ...129283 Cross track error 129284 Navigation data 130306 Wind data Helm Control Type PGN Description Transmit and receive 059392 ISO Acknowledgment 059904 ISO Request 060928 ISO Address Claim 126208 NMEA Command Request Acknowledge Group Function Type PGN Description 126464 Transmit Receive PGN List Group Function 126996 Product Information Transmit only 128259 Water Speed 129025 Position Rapid Upda...

Page 15: ...RPM Limit Allows you to adjust the lowest RPM point of your boat If the value does not match the value on the helm control you can adjust the value High RPM Limit Allows you to adjust the highest RPM point of your boat If the value does not match the value on the helm control you can adjust the value Max Speed Allows you to adjust the maximum speed of your boat If the value does not match the valu...

Page 16: ...lace Contacting Garmin Product Support Go to www garmin com support and click Contact Support for in country support information In the USA call 913 397 8200 or 800 800 1020 In the UK call 0808 2380000 In Europe call 44 0 870 8501241 Garmin and the Garmin logo are trademarks of Garmin Ltd or its subsidiaries registered in the USA and other countries GHP GHC Reactor and Shadow Drive are trademarks ...

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