Thank you both for the input.?
Disconnecting the 24v from the Cresnet wire lets the processor boot but the TSTAT is not discoverable then in CH.?
I have the jumper in the top position and R -> RH, W-> W1 & C -> 24(C). Thermostat works fine. Even if I disconnect all the other wires, simply plugging it into cresnet 4 wire trips the processor.?