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Replacing CPUA on TAC32 Hydro

c u later

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Jul 11, 2025
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I'm replacing the CPUA on a TAC32 Hydro for a service job and now I just want to make sure I get the job files downloaded and uploaded correctly. I have not done this one in a while. I mainly need the procedure for saving the config from the old CPUA and moving it to the new one without messing anything up. If anyone has a step-by-step cheat sheet for this, that would be a huge help.
 
Easiest way I think is to use a USB stick with the job file saved from the old CPUA. Pop it into the new one, set the BOOT jumper to 1–2, hit reset, and let the recovery run. Once the STAT LED blinks twice every 2 secs, switch the jumper back and reset again. That should load the config cleanly!
 
Start by connecting to the old CPUA using the software usually TAC Vista or similar, export the current project or job files, make sure you save all configs and settings then, connect to the new CPUA and import those files, verifying all parameters and tags transferred correctly. Before switching over, double check communication settings and test everything in a safe mode if possible
 
Just did one recently, connect to the old CPUA via serial, use UHC Tools to pull the job file (save both job and settings), once the new CPUA is in, push the files back using the same tool
 
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