I have no experience with Trane Tracer Panel. I have to controllers on the network, 2 ZN517's, one is communicating properly. The first thing I did was to reset the problem ZN517, it did not come back onliine. I tried a rebind, that did not help either. I put the Tracer panel to look for other devices, then I hit the service pin button, the panel did discover the ZN517. This tells me that the communications wires to the controller are good (I think). Is there something else I could try to get this device back online. I don't have any Trane software.