TZ touch3 shutting down and restarting.

[Frustrated]

Hello, the unit is from 2022 and after not starting the boat for a month, the display/unit started up then shutdown halfway through loading of the progress bar. After multiple tries, it finally loaded all the way and as I checking the voltage, 12.2 it shut down again and restarted itself.
I tried to see if there was an error log, but the unit doesn't stay on long enough to get to that menu.

The unit was in the shade the last time. air temp at 88, voltage 12.2.

Last update check was a year ago.

The unit is in the console and clean, no salt or corrosion.

Anyone have an idea to try?

Thanks,
Nick

 

[Quitsa]

Unplug the unit from all its external connections except the power cord and try to start it up. If that doesn't work, you could try downloading the current software update and creating a USB stick that you could plug into the unit and then start it up. It will run the update and install the newest version. The downside is that you may have to redo your setup since you won't have been able to save your settings unless you had previously saved them or saved to TZCloud. https://v1.furunosoftware.com/location/tzt3/NNTZT3_v3.80.1.zip.

Of course this assumes you do not have a hardware problem.

 

[allrelative]

Why is the voltage 12.2? Make sure you have steady and consistent voltage 1st. If it reboots during the upgrade, you might be worse off. Calling Furuno support is the only support line I don't mind calling, they are good.

 

[Johnny Electron]

A charging battery is going to read 13.5 to 14. That voltage seems low. I would power it from a different source like a power supply and see what happens. If power is bad, it is like having bad fuel for your car. Bad NMEA 2000 can cause TZT1 and TZT2 to reboot but TZT3 normally doesn't reboot unless it is power or grounding related. You can remove all the cables but the power cable and remove the chart card to see what happens. It sounds like power on the surface of it.

 

[Quitsa]

You did not mention if you had the engines running when you tried to boot up the unit. That would raise the input voltage to the TZT 3 significantly with the alternator output and is worth trying for sure.

 

[Sparky Wire]

My guess is either power or overheating damage. After trying the power as J.E. says, if it still has problems; I would get that in for repair evaluation.

 

[Frustrated]

This is what I found out, I cleaned all the battery terminals and checked the batteries individually both reading 12.6.
I cleaned the battery terminals and all connections that I could find.
Turn the unit on and it was reading 12.4.
I then plugged in a battery charger to the batteries and watch the voltage rise to 12.7
When I took the battery charger off I watched the voltage drop back to 11.8.

The good news is that the system did not restart on its own, but I don't know where the voltage leak can be.

 

[Quitsa]

This is what I found out, I cleaned all the battery terminals and checked the batteries individually both reading 12.6.
I cleaned the battery terminals and all connections that I could find.
Turn the unit on and it was reading 12.4.
I then plugged in a battery charger to the batteries and watch the voltage rise to 12.7
When I took the battery charger off I watched the voltage drop back to 11.8.

The good news is that the system did not restart on its own, but I don't know where the voltage leak can be

 

[Quitsa]

Have you measured the voltage at the battery terminals with a voltmeter? Are they sealed AGM type batteries or regular flooded ones to which you need to add water (check level if so)? After being on the charger for a full day, good batteries should read at least 12.8V at the terminals. If you have a long wire run to your TZT 3 from the batteries, a voltage drop would be expected. It is a function of the length and the gauge of wire. It is possible that the wires from your batteries to the TZT 3 are too small, which would produce a significant voltage drop. It's easy to check by comparing the voltage at your TZT 3 to the voltage at the battery terminals.

 

[Sparky Wire]

You getting close to pinning it down. Great job.