I assume you mean the Z1000 is powering the entire layout, not just the switch.
I assume you are controlling the switch via the black remote controller. Has that black cable from the switch to the remote controller ever been cut or disassembled at either end ?
I would first try powering that switch with auxillary power and see if that helps.
I believe there have been known wiring issues with certain FT switches, but try the above first.