Check all the p24 connections in the car station,find what feeds the hall calls to the clc. Probably a ɓad connection somewhere in there.
The hall calls should be fed off p24g in the controller. P24g is the group p24. Just had a duplex job where if car one was shut off the top floor hall call quit working for car 2. Found that whoever had originally installed the job fed the top floor hall call from p24 in car ones controller. Of course if it's off, p24 is dead, moved the feed to p24g and now it works no matter which car is on/off.
If hall calls aint working I would start at jumping it in the controller. Takes 5 seconds and you know right away if the problem is in the hatch wiring/buttons if it works or rule all that out if it won't take the call from the controller.
