Question about Furuno NavPilot 511 GPS Receiver

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Autopilot can not sense rudder movment

The pump is working ok but auto pilot can not see the movment stuck on 35 Starboard

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Check rudder reference unit wiring

Posted on Jun 24, 2010


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Raymarine 4000 + autopilot. I immediately get an RG Fail message when I engage the autopilot on my Catalina 320 Sailboat.

I am not familiar with your particular model autopilot, but I do know that Raymarine autopilots can be fussy. All must have a compatible gps feeding it, of course. All must have a rudder angle indicator if your auto pilot connects to the wheel or rudder instead of directly to the tiller.

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Drive unit error navpilot 511

That errors means the autopilot is trying to move the rudder but it thinks its not moving. If you can manually move the rudder in standby mode with the green or red buttons on the 511, then the problem is typically with the rudder feedback unit. i.e. the rudder is moving but the only way the pilot knows it is if the signal changes from the rudder feedback unit.

If you can't make the pump work with the arrows (or anything else) then the problem lies with the pump. Check 12VDC to the pump and the connection to the processor.

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1 Answer

Turns hard to starboard when in auto

Verify that it is configured for your installation. Some units can be installed either on the port or starboard side, and they have to be programmed accordingly. Verify this in the user's manual.

Jul 04, 2013 | Raymarine St8002 Smartpilot Autopilot...

1 Answer

ST6001 when press auto it engages but within seconds turns hard to port and stays engaged until we turn off the power at A/P switch.

Try reversing the motor leads on the CPU. If this doesn't work you will have to check the rudder feedback to see if it is operating properly. The easiest way to check this is to steer the wheel from port to starboard extremely slowly and make sure the readout on the control head has a smooth transition when you turn the wheel.

Aug 23, 2010 | Raymarine Smartpilot Autopilot St6002 S1g...

1 Answer

MOT POW SWAPPED, this is the message which appear just like that. the autopilot is working last 5 years, i have checked the wires connections, all is set as the diagram. one thing: my rudder has some...

Check if rudder reference unit is installed as before ,it seems that the pilot sense that the rudder is turning the wrong way. check when giving +10 command the
rudder turns to increase the heading,if yes, it could be the wiring of the rudder reference unit or it was installed the wrong way after service on the rudder.
Is rudder position indicating correctly?

Jun 24, 2010 | Raymarine Smartpilot Autopilot St6002 S1g...

1 Answer

My furuno autopilot 511 has a rudder reference unit which worked and then stopped displaying rudder position. I assumed it broke and replaced it. I still get no display. How can I clear the unit. I had a...

the rudder setup needs to be done. follow prompts, very common to be screwed up, read directions carefully and make sure that if it says steer hard starboard, it is hard starboard before you proceed! 847-746-0100

Jun 01, 2010 | Furuno NavPilot 511 GPS Receiver

2 Answers

Auto pilot will not hold course. Wants to go to port as soon as it is turned on

What model autopilot? If it is a Raytheon/Raymarine try switching the motor leads to see if that works.

May 16, 2010 | Boating

2 Answers

Autopilot shows "no rudref"

The rudder sensor works like a light dimmer, so you get 5V and ground on the outside two connections and a varying voltage between about 1 and 4 volts depending on rudder position

Jul 07, 2009 | Raymarine Smartpilot Autopilot St6002 S1g...

1 Answer

Linear rudder refernce Furuno 500 auto pilot will not pass test?

light on board is probably normal no, this is an inductive pickup, can not test with ohmeter, sorry. Test with display, observing rudder angle display. Do rudder setup repeatedly until it works, it is a little fussy for placement and clearance but patience and the correct "bracketry" will make this pilot perform great.

Apr 06, 2009 | Furuno Navpilot 500 Navigational Autopilot...

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