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Summary of Contents for Kongsberg SIMRAD AP25 Series
- Page 1 AP25-SERIES AUTOPILOTS Maintenance and Troubleshooting...
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Page 2: Proper Installation
AP25-Troubleshooting THE KEY TO AUTOPILOT TROUBLESHOOTING PROPER INSTALLATION If you don’t believe this then ask yourself how many times you’ve had to troubleshoot a newly installed autopilot system that was correctly installed! - Page 3 AP25-Troubleshooting When troubleshooting a new system; Always ask: DID IT EVER WORK PROPERLY?
- Page 4 AP25 - Troubleshooting • If the pilot worked previously? – Something must have changed • First verify that everything works properly at the dock…….If the pilot does not work at the dock there is no sense in going on a sea trial –...
- Page 5 AP25 Troubleshooting – Go in and check all the parameters and look to see if the values seem off - it is always a good idea to write the seatrial parameters down so that you and the customer have a record •...
- Page 6 AP25 Troubleshooting - steering problem • With the pilot in Standby mode, have the captain hand steer the vessel - enter the Installation loop - Service menu - System data.There is a lot of useful data here! – Watch the compass display and verify it is stable –...
- Page 7 AP25 Series • Troubleshooting a steering problem – Have the captain hand steer the vessel on the same heading as the autopilot was having difficulty. – How does he do? – If the vessel cannot be steered by hand, That is a problem! •...
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Page 8: Troubleshooting
AP25-series Troubleshooting • Seatrial (mandatory after replacing anything) Symptom Poor steering (S-ing) Incorrect steering parameter setup Check Rudder, Counter Rudder and Autotrim values Check Response setting Bad compass performance Check compass readout and stability (make new calibration) Play in steering gear, rudder stock or F.B. Linkage Air in hydraulic system... - Page 9 AP25-Series • Symptom – Steering OK in calm sea, but poor in rough sea Bad compass performance Check mounting location Check Course-detector cable Too low rudder speed (drive unit too small) Big yawing in following sea Compass problem (as previously noted) Too low rudder speed (drive unit too small) Poor steering in Northerly (Southerly) direction Northerly (Southerly) turning error...
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Page 10: Nav Mode
AP25-series Troubleshooting Nav mode: Verify that proper vessel type and nav type is selected Check that Autopilot reads position from GPS/Plotter Set GPS/Plotter to navigate to a waypoint (from present position) Observe Autopilot display readout shows correct nav.data (bearing, xte, etc) Check the setting for initial nav. -
Page 11: Repair Action
AP25-series Troubleshooting • Symptom: – Autopilot will not shut off or cannot be turned on Possible fault: Defective Control Unit Defective Autopilot Computer (AC) Defective Robnet2 cable Repair action Disconnect Robnet2 cable from Control Unit Try to switch on (or off) the AC by making a temporary connection between on/off (yellow) and V sys- (grey) on the Robnet2 terminal. - Page 12 AP25-series • Symptom – Rudder Feedback failure How to check a RF300 outside an autopilot system: Connect the suspected RF300 to a 15V power supply through a resistor network as shown below. Hook up an oscilloscope or a frequency counter as shown. A working RF will give 3400Hz (square wave) in center position, changing ±20Hz per degree of movement.
- Page 13 AP25-series • Symptom – Compass failure How to check a RFC35 outside an autopilot system: Hook up the RFC35 same way as for the RF300 check. The output is a pulse width modulated signal (square wave). The frequency will be between 55 and 70Hz, depending on heading. The signal level will be between 2 and 4V, also depending on heading.
- Page 14 AP25-series Troubleshooting...
- Page 15 AP25-series Troubleshooting Simplify system: Disconnect remotes Disconnect compass / select other compass (Reset alarm) Disconnect feedback unit (Reset alarm) Try to eliminate cables Use service kit to substitute known good units for suspect Voltage checks: Mains input (10-40V) Robnet system voltage (26,5V) Output to drive unit motor or solenoids (when operated) Rudder feedback unit supply, RF+/RF- - 11-12V with RF connected...
- Page 16 AP25 Series Troubleshooting - Functions in the autopilot computer • Main Pcb – Microprocessor - storage of parameters – Robnet processing – Heading information – Feedback information – NMEA channel 1 • Power Pcb – Motor – Clutch – Alarm –...
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Page 17: Start-Up Displays
AP25-series Start-up displays Simrad Autopilot model AP25 SW 1.0.00 Software version Software release HW rev. 00 Hardware revision Sn xxxxxx SimNet no. Simrad Autopilot computer model SELF CHECK TABLE AC20 SW 1.0.00 • S000 = OK Software version Software release S000 •... - Page 18 Autopilot maintenance • The control units and the computer will under normal use require little maintenance – just keep them dry and clean • Rudder Feedback - make a visual inspection at 2-3 month intervals and at the start of each season. Apply some grease at the RF300 ball joints when required •...
- Page 19 System failure alarms • The boat is off course (> 20 deg.) • Compass data missing • Rudder feedback failure • Rudder response failure (5 sec.) • Nav. data failure • Com. failure active control unit • ACXX current overload (> 12/20/40 A) •...
- Page 20 System failure alarms • Com failure with ACXX • Low supply voltage (< 9V) • High supply voltage (> 29/44V) • Low 15V (internal) • ACXX high temp (>75 deg.C) • Memory failure ACXX...
- Page 21 AP25-series • Remove the PROM from the socket Replacing PROMS by means of the special extraction tool (p/n 44139806). • Insert the tool by pressing the two grip pins down into the two slots in the corners of the socket. •...
- Page 22 AP25-series ACXX Main Board PROM...
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