Tri-Data Fault finding.

[SiteSurfer]

Hoping for some pointers.

Raymarine TriData on the binnacle, log and depth units up front next to each other.
TriData powers up, and we (think) can hear a ticking from the echo sounder, log spins freely after applying a vinegar bath.

However - no information makes its way back to the head unit. All cables seem attached and in place when the pod on the binnacle is removed for inspection.

12V is present at the head unit, and it displays --- (or similar). Spinning the log does nothing and the Echosounder doesn't register at all (not even OUT). This is on the hard (not tested in the water yet).

I am left with trying to establish continuity I think, from the head unit to the module in the hull - is there a way to do that? Or - are there any pointers I could take with me this week to check?

Boat has been out of the water for a time, had issues with bulbs and so forth needing to be reset before they would work - I am wondering if there is a common thing to look for with the Raymarine equipment.

I am having the MHU investigated this week (which was a discussion in another thread) - as we think the bearings have gone in that.

 

[earlybird]

A fairly common problem with ST60 instruments is caused by failure of the thermistor in the paddle wheel transducer. If this is not "seen" by the Tridata, it thinks it's a slave instrument and powers up accordingly to register Seatalk information. The fix is to put a resistor across the appropriate wires, explained on Raymarine website. The temperature reading is lost of course.
This may be your problem but I wouldn't expect the depth transducer to tick.
IIRC, both depth and log are affected by this fault.
Edit:-Just looked; 10kohm resistor across brown and white wire instrument terminals is suggested.

 

[Morepower]

That is correct, The unit thinks its a slave... the depth won't work until it's in water.... I thought mine had failed... (low tide, bilge keel)... but once floating, All good..

Hope this helps

Regards

Tim

 

[LittleSister]

A fairly common problem with ST60 instruments is caused by failure of the thermistor in the paddle wheel transducer. If this is not "seen" by the Tridata, it thinks it's a slave instrument and powers up accordingly to register Seatalk information. The fix is to put a resistor across the appropriate wires, explained on Raymarine website. The temperature reading is lost of course.
This may be your problem but I wouldn't expect the depth transducer to tick.
IIRC, both depth and log are affected by this fault.
Edit:-Just looked; 10kohm resistor across brown and white wire instrument terminals is suggested.

Does this apply to the ST40, too, perchance? I've got a combined depth/speed/water temp. transducer, but separate depth and speed/temp. instruments. The depth instrument works fine, but the speed one shows something like - - -, and it displays temp. readings that are clearly untrue (e.g. -6) and also wander up and down.

 

[SiteSurfer]

Thanks folks, I will give this a whirl this week and see what happens!

 

[earlybird]

Does this apply to the ST40, too, perchance? I've got a combined depth/speed/water temp. transducer, but separate depth and speed/temp. instruments. The depth instrument works fine, but the speed one shows something like - - -, and it displays temp. readings that are clearly untrue (e.g. -6) and also wander up and down.

Don't know about the ST40 speed, but it didn't seem to affect my original ST50 log. I had the problem only when I replaced it with an ST60 Tri-data. Try fitting a resistor, can't do any harm.

 

[SiteSurfer]

Just to update thread, boat now in water and depth is fine (yay) - had confirmed that the log transducer is at fault so will be trying the resistor fix - nothing to lose.