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Trying to decipher fault code on HTP Pioneer cascade secondary unit

fbnewtz
fbnewtz Member Posts: 9
in Radiant Heating

I was able to replace my system sensor and now I am getting a fault code on the secondary unit in a cascading setup. The issue is that the screen looks like a few of the LED lights are malfunctioning right now. Not sure quite how to figure out where to go from here.

IMG_2800.jpeg

The CH Pump light is on and the fault light is also on. Since this is the secondary unit and not the master then it is obviously not an E03 code.

So that would leave F05, F06, OR possibly even a F09 on the table right now based on the error codes available.

My question is if it is F05 or F06 where are those temperature sensors located? I am going to try and figure out if there is something I can cycle through to figure out what all of the LED lights are out to try and see if that will help me determine the actual error code.

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