What causes a 'Com. failure with ACXX' error on a Simrad AP25, and how to fix it?
If your Simrad Autopilot System displays 'Com. failure with ACXX', it indicates a faulty Autopilot Computer or poor Robnet2 cable connections. You can resolve this by checking the Robnet2 connectors and cable, or replacing the Autopilot Computer PCB.
What does 'Memory failure ACXX' mean on Simrad AP25 and how to fix it?
If your Simrad Autopilot System displays 'Memory failure ACXX', it means there is a wrong checksum on memory parameters or variables and the Autopilot Computer will use default values. To solve this perform a "Master reset" by switching the system off and on again. If the alarm repeats, replace the Autopilot Computer PCB.
What causes 'Failure active Control Unit' on Simrad Autopilot System and how can I fix it?
If your Simrad Autopilot System displays 'Failure active Control Unit', it means that the active control unit has gone silent. To resolve this, press the STBY button on an "Inactive" unit to reset it. Also, check or repair the Robnet2 cable, or replace the control unit PCB if necessary.
General| Brand | Simrad |
|---|---|
| Model | AP25 |
| Category | Autopilot System |
| Language | English |
General introduction to the Simrad AP25 autopilot system and its capabilities.
Guidance on using the manual for operating, installing, and maintaining the AP25 autopilot.
Lists the basic units of the AP25 system and its expansion options.
Description of the compact autopilot control unit, its display, and connectors.
Details the autopilot computer as the system's core, listing models and features.
Describes the rudder feedback unit and its function in converting rudder travel to a signal.
Explains compatibility with RC36 Rate compass, RFC35 Fluxgate, NMEA, and gyrocompasses.
Lists optional accessories like remote controls, joysticks, and interfaces.
Details software versions and their implemented features and fixes.
Provides an overview of the AP25 front panel layout and controls.
Explains how to turn the system ON/OFF and the status displays.
Details zero point setting for the MSD50 Stern Drive unit.
Describes how to use the course knob to set rudder commands in Follow-Up mode.
Explains how the PORT/STBD buttons control rudder movement in NFU mode.
Details the operation of the R3000X remote control for mode changes and course adjustments.
Describes the operation of the JS10 Joystick, similar to the R3000X remote.
Explains how AUTO mode selects current heading as set course and maintains rudder angle.
Discusses HI/LO response parameters for different speeds and conditions.
Explains how to manually toggle between LO and HI parameters.
Introduces various pattern steering features available in AUTO mode.
Explains how to quickly take control of the helm and resume heading.
Describes how to connect and control a thruster with the AP25 system.
Explains the tack function available in AUTO mode for sailboats.
Describes NoDrift mode as an alternative to route steering.
Explains how to use steering information from an external navigator.
Details how to perform dodging in NAV mode, similar to AUTO mode.
Explains how to choose between multiple navigation sources.
Describes how to enter WIND mode and set course/wind angle.
Explains the tacking and gybing aid function in WIND mode.
Details WINDNAV mode for steering using wind and track data.
Explains how control is accessible from multiple control units.
Describes the safety feature that disables all control units except one.
Explains how to access and navigate the User Set-up menu.
Provides easy access to racing parameters via the NAV/WIND button.
Describes how to access instrument pages and view information.
Provides an overview of the installation requirements and systems to interface with.
A step-by-step checklist for installing the AP25 autopilot system.
Instructions for unpacking and visually inspecting the equipment.
Emphasizes understanding the system layout before installation.
Shows a diagram of the AP25 system layout with various options.
Details the mounting and mechanical linkage for the RF300 Rudder feedback unit.
Provides guidance on installing the autopilot computer unit in a suitable location.
Specifies cable types, sizes, and connections for the system.
Explains grounding procedures and RFI protection for the system.
Presents tables and diagrams for installing various drive units.
Details panel mounting and alternative mounting for the control unit.
Describes how to mount the control unit using an optional bracket.
Explains the use and connection of Robnet2 network cables.
Provides instructions for installing the RC36 Rate Compass.
Details the installation of the RFC35 Fluxgate Compass as an optional backup.
Explains the mounting and connection for the R3000X remote control.
Refers to separate installation instructions for the JS10 Joystick.
Describes the mounting and connection for the S35 NFU Lever.
Outlines possibilities for connecting to other equipment for data exchange.
Details the SimNet cable system, connectors, and installation.
Details the connection for single NMEA input/output.
Explains the connection for double NMEA input/output.
Lists output signals, terminals, and sentences for NMEA output on Port 2.
Details the connection for NMEA compass input.
Shows the connection for Radar Clock/Data.
Describes options for interfacing IS15 instruments via SimNet or NMEA0183.
Explains the external alarm circuit connection.
Details the installation of the LF3000 Linear Feedback unit.
Guides through the initial startup and automatic interface process.
Categorizes and describes the various installation settings available.
Explains how to access and navigate the Installation Menu.
Covers settings to be configured prior to sea trials.
Explains dockside settings specifically for Virtual Feedback configurations.
Sets clock/data output format for radars connected to the Autopilot Computer.
Accesses display unit setup for Wind Speed, Sea Temperature, and Depth.
Outlines the settings and calibrations required during a sea trial.
Allows viewing and changing of basic steering parameters.
Accesses test functions and system data for analysis.
Basic maintenance for the AP25 Control Unit, including cleaning.
No special maintenance required, but visual inspection is advised.
Visual inspection and greasing of ball joints for Rudder Feedback.
Visual inspection of compass if exposed to weather.
Refers to drive unit manual for maintenance instructions.
Details how to remove and insert EPROM for software updates.
Lists display readouts, probable faults, and recommended actions for system alarms.
Lists part numbers for the AP25 Control Unit and its accessories.
Lists part numbers for Autopilot Computers and related components.
Lists part numbers for the RFC35 Fluxgate Compass and accessories.
Lists part numbers for the RC36 Rate Compass and accessories.
Lists part numbers for the RF300 Rudder Feedback Unit and its components.
Lists various Robnet2 cables and their lengths.
Lists SimNet cables, accessories, and converters.
Lists tools, such as the EPROM extraction tool.
Provides overall technical specifications for the AP25 Autopilot System.
Details the dimensions, weight, power consumption, and environmental specs of the AP25 Control Unit.
Lists specifications for AC10, AC20, and AC40 Autopilot Computers.
Details specifications for the RC36 Rate Compass.
Lists specifications for the RFC35 Fluxgate Compass.
Provides specifications for the RF300 Rudder Feedback unit.
Details specifications for the R3000X Remote Control.
Lists specifications for the JS10 Joystick.
Provides specifications for the FU25 Steering Lever.
Details specifications for the IS15 Rudder instrument.
Lists specifications for the SimNet network and its components.
Explains the IP protection codes for Simrad autopilot system parts.
Provides an overview of NMEA0183 and SimNet messages and data.
Definition of apparent wind.
Definition of an arrival alarm signal from a GPS/chartplotter.
Definition of an artificial boundary around a destination waypoint.
Definition of horizontal direction from a reference point.
Definition of Bearing to a specified waypoint from present position.
Definition of Bearing waypoint to waypoint.
Definition of Course Over Ground.
Definition of Global Positioning System.
Definition of bearing relative to magnetic north.
Definition of local magnetic field onboard a vessel.
Definition of heading relative to magnetic north.
Definition of difference between magnetic and true north.
Definition of a serial data link format for marine electronics.
Definition of a serial-data communications network for marine equipment.
Definition of a product identifier.
Definition of a Simrad product name.
Definition of a stored sequence of waypoints.
Definition of products connected to SimNet or NMEA2000.
Definition of Simrad products sharing data sources.
Definition of SimNet controller products with displays.
Definition of products without SimNet controllers.
Definition of Speed over ground.
Definition of bearing relative to true north.
Definition of heading relative to true north.
Definition of a discrete point stored in a navigator.
Definition of Cross Track Error.
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