myHanse.com - Hanse Yacht Owners Website myHanse.com - Hanse Yacht Owners Website myHanse.com - Hanse Yacht Owners Website myHanse.com - Hanse Yacht Owners Website

Welcome to myHanse.com the forum for Hanse Yachts owners throughout the world.

Forum Home Forum Home > General > Chit Chat
  New Posts New Posts RSS Feed - Autopilot computer failure
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Autopilot computer failure

 Post Reply Post Reply Page  12>
Author
Message
32mike View Drop Down
Lieutenant
Lieutenant


Joined: 26 March 2020
Location: FL
Status: Offline
Points: 32
Post Options Post Options   Thanks (0) Thanks(0)   Quote 32mike Quote  Post ReplyReply Direct Link To This Post Topic: Autopilot computer failure
    Posted: 14 February 2021 at 14:36
Anybody have any first hand experience with the NAC-3 autopilot computer failing while in use? Ours just died while sailing the other night. Got a message “autopilot computer failure” on plotter and the Nav switch on the DC panel blinks when on.
Mike
S/V Dulces Sueños
458 #087
Tampa, FL
Back to Top
Arcadia View Drop Down
Commander
Commander
Avatar

Joined: 27 November 2017
Location: Sag Harbor, USA
Status: Offline
Points: 114
Post Options Post Options   Thanks (0) Thanks(0)   Quote Arcadia Quote  Post ReplyReply Direct Link To This Post Posted: 14 February 2021 at 17:08
Sounds like a blown fuse on the dc panel.  The display will indicate “failures” when the computer is off line. Be careful when replacing the fuse. It can be tricky. It should be near the connector label XB 4.3
Leon / ARCADIA
2018 Hanse 588
Sag Harbor, NY
Back to Top
Arcadia View Drop Down
Commander
Commander
Avatar

Joined: 27 November 2017
Location: Sag Harbor, USA
Status: Offline
Points: 114
Post Options Post Options   Thanks (0) Thanks(0)   Quote Arcadia Quote  Post ReplyReply Direct Link To This Post Posted: 14 February 2021 at 17:09
I should clarify that “failure” would displayed on your Plotter.  The DC panel will blink when there is a blown fuse on the corresponding switch.
Leon / ARCADIA
2018 Hanse 588
Sag Harbor, NY
Back to Top
S&J View Drop Down
Rear Admiral
Rear Admiral
Avatar

Joined: 30 August 2014
Location: UK
Status: Offline
Points: 609
Post Options Post Options   Thanks (0) Thanks(0)   Quote S&J Quote  Post ReplyReply Direct Link To This Post Posted: 15 February 2021 at 00:04
I expand on the "tricky" part of fuse replacement, it is best to turn off the 12V DC supply to the control panel when replacing fuses just in case you drop them and they short out something on the panel.
H458 #159 Primal launching spring 2021
Back to Top
Arcadia View Drop Down
Commander
Commander
Avatar

Joined: 27 November 2017
Location: Sag Harbor, USA
Status: Offline
Points: 114
Post Options Post Options   Thanks (0) Thanks(0)   Quote Arcadia Quote  Post ReplyReply Direct Link To This Post Posted: 15 February 2021 at 01:38
Agreed!  You need surgical skill. You may want to upgrade to  20 amp fuse from the factory 15 amp. The dedicated wiring to the autopilot will handle up to 30 amps.
Leon / ARCADIA
2018 Hanse 588
Sag Harbor, NY
Back to Top
32mike View Drop Down
Lieutenant
Lieutenant


Joined: 26 March 2020
Location: FL
Status: Offline
Points: 32
Post Options Post Options   Thanks (0) Thanks(0)   Quote 32mike Quote  Post ReplyReply Direct Link To This Post Posted: 17 February 2021 at 11:23
Thank you gentlemen. I figured it might be a fuse. I’ll see what I can find. I have to admit that the correlation between switches and fuses and wires on that DC panel is a bit bewildering to me. Things don’t seem to match up to where simplicity would dictate they should.
Mike
S/V Dulces Sueños
458 #087
Tampa, FL
Back to Top
32mike View Drop Down
Lieutenant
Lieutenant


Joined: 26 March 2020
Location: FL
Status: Offline
Points: 32
Post Options Post Options   Thanks (0) Thanks(0)   Quote 32mike Quote  Post ReplyReply Direct Link To This Post Posted: 17 February 2021 at 11:26
How do you shut off 12 volt DC supply to the panel? Shut off the house battery switch - the red one?
Mike
S/V Dulces Sueños
458 #087
Tampa, FL
Back to Top
Arcadia View Drop Down
Commander
Commander
Avatar

Joined: 27 November 2017
Location: Sag Harbor, USA
Status: Offline
Points: 114
Post Options Post Options   Thanks (0) Thanks(0)   Quote Arcadia Quote  Post ReplyReply Direct Link To This Post Posted: 17 February 2021 at 14:18
Yes. That’s the only way. I can send you a diagram of the DC panel. I’ll need your email (you can private message it to me if you want. 
Leon / ARCADIA
2018 Hanse 588
Sag Harbor, NY
Back to Top
Norman John View Drop Down
Sub Lieutenant
Sub Lieutenant
Avatar

Joined: 07 October 2020
Location: Hayling Island
Status: Offline
Points: 3
Post Options Post Options   Thanks (0) Thanks(0)   Quote Norman John Quote  Post ReplyReply Direct Link To This Post Posted: 17 February 2021 at 17:07
Just an alternative suggestion -  there may be a faulty electrical connection.  Dampness entering electrical wires or connectors can cause the wiring to fail - hence no response from the autohelm.  Can be worth cutting doing an electrical continuity check or cutting through a wire to check on its state.  hope its not your computer.  All the best.
Norman Payne
Back to Top
32mike View Drop Down
Lieutenant
Lieutenant


Joined: 26 March 2020
Location: FL
Status: Offline
Points: 32
Post Options Post Options   Thanks (0) Thanks(0)   Quote 32mike Quote  Post ReplyReply Direct Link To This Post Posted: 22 February 2021 at 20:38
As a follow-up, it was a blown fuse. Thanks to Leon on Arcadia I was able to find the right one. The spares kit, however, did not have the small fuses - another trip to West Marine to stock up on various sizes of those. Thanks, everyone for the help.
Mike
S/V Dulces Sueños
458 #087
Tampa, FL
Back to Top
 Post Reply Post Reply Page  12>
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.063 seconds.

Links : www.hanseyachts.co.uk www.hanseyachts.com www.fjordboats.co.uk www.dehler.co.uk www.varianta.co.uk