Autohelm ST6000 keeps switching to standby

[Rocksteadee]

I have an Autohelm ST 6000 with a type 1 12v controller
Worked for about a hour and now switches back to Standby after a couple of seconds on Auto.
Any ideas?

 

[scottie]

I have an Autohelm ST 6000 with a type 1 12v controller
Worked for about a hour and now switches back to Standby after a couple of seconds on Auto.
Any ideas?

Low voltage?

 

[Rocksteadee]

Low voltage?

First thing I checked.
It has twin ST6000 Control heads and does the same on both.

 

[Orthop]

My Garmin works well after a software update...

 

[jrudge]

I suspect the last Raymarine update was 15 years ago !

Mapism was going to do one for his joystick. Don’t know if he ever did !

 

[superheat6k]

These might help ...

https://www.dropbox.com/s/rqkm1pnamc9b5m2/Autohelm ST 6000 Plus Service Manual.pdf?dl=0

https://www.dropbox.com/s/cdlabidtequ88jt/Autohelm 100 Low Voltage Fault resolve.pdf?dl=0

https://www.dropbox.com/s/9hel7jne0asluma/Autohelm ST000 Service Manual.pdf?dl=0

https://www.dropbox.com/s/1u052qeoyuk930m/Autohelm ST6000 Autopilot System Operation Manual.pdf?dl=0

https://www.dropbox.com/s/iqvpe8u29dvvelu/Autohelm ST6000 Install man.pdf?dl=0

https://www.dropbox.com/s/s5zx2xbv020z7b4/Autohelm ST6000 ST7000 Inboard Service Manual.pdf?dl=0

https://www.dropbox.com/s/cn0m6zeyosro6iy/Autohelm Type 100-300 Course Computer Serv Man.pdf?dl=0

I'm on my boat in the morning if you want a chat.

 

[Rocksteadee]

All sorted. It was low voltage and being an intermittent bad connection was not apparent. Only once I used my decent Fluke meter with a high refresh rate did I see a momentary drop in volts

 

[scottie]

Firstly this is not a told you nor a criticism so don’t be offended but is amazing how often the obvious answer is checked initially and for some reason does not show up leading to major often expensive investigation and the fault only be diagnosed by starting all over despite being an obvious reason for failure
Sod’s law?

 

[Rocksteadee]

Firstly this is not a told you nor a criticism so don’t be offended but is amazing how often the obvious answer is checked initially and for some reason does not show up leading to major often expensive investigation and the fault only be diagnosed by starting all over despite being an obvious reason for failure
Sod’s law?

Quite right lol.
The first time I just “checked” the voltage.
This time I connected the DMM into the supply connections. Only on the 4th time of dropping from Auto to Standby I saw the supply momentarily drop 2v. Only after about an hour the supply dropped to 11v and stayed there.
Then after a split check (separate 0v, then separate 12v) it turned out it was the 0v supply with a loose connection back at the main panel terminal block.