I’ve got 3 PYZ series PYZ4RAY1-4V controllers who have all decided to quit working in a week or so of eachother.
Fuji PYZ Controller
They all won’t respond correctly to the sense input (TC, RTD, Voltage/Current) and 2 of them are stuck at -208 no matter what. I don’t see any glaring issues on the boards, the capacitors are all happy, nothing burned out/damaged. Can’t find any reference to them on the internet except for a manual here.
I’ve also got an Omega CN8500 with similar issues.
Anyone else familiar with these controllers?
Lots of Fuji PYZ Controllers
I’ve encountered exactly the same problem with an Omega CN8500. After turning it ON I get an error message (“ERR.L”) which (according to the manual) means “Reversed sensor”. Replacing the sensor and/or changing the controller parameters doesn’t help.
Were you able to make it work in the end?
I was never able to get mine to work, I wonder if whatever chip is doing the conditioning on the thermocouple input isn’t broken.