New tstats: residential Carrier Weathermaker II Two-Zone Comfort Zoning System
your zone board is controlling the output, your input is a standard input for a conventional system and then the zone board deciphers from there what part of the system to use. if you call for heat from one zone. you can check the output of the board for 24v between C and G, Y1. If you have 24V between W1 and C while having the other 24V outputs then, yes, there is a problem.