whatever75 Posted June 24, 2022 Share Posted June 24, 2022 Good afternoon all, I have unit C4-Z2IO installed on all 3 of my garage doors. Two are working perfectly, the third one recently installed and configured identically seems to have an issue with relay 1. I'm using option 3 in the configuration (1 relay, 2 contacts). Relay 1 is clicking when I press the icon to open the door but it does not trigger the garage door. When I remove the wires from the C4-Z2IO unit and touch them together the door instantly opens. Additionally, re-configured to use option 1 (2 relays) and connected the wiring to relay 2 in the unit. With this configuration the garage door opens. Of course with this config I can't use the contact switch I have. Any thoughts on this issue, does the unit have a bad relay? Thanks in advance. James. Quote Link to comment Share on other sites More sharing options...
chopedogg88 Posted June 24, 2022 Share Posted June 24, 2022 sounds like either a bad relay (which I've yet to see on a Z2IO), or perhaps just wired into the wrong terminals. Quote Link to comment Share on other sites More sharing options...
whatever75 Posted June 25, 2022 Author Share Posted June 25, 2022 Hello, Thank you for responding. I'm 99% certain it's the relay. I've double checked the wiring and even replaced it. As mentioned once I connect relay 2 it worked perfectly. Looks like I'll have to replace it. Cheers, James. Quote Link to comment Share on other sites More sharing options...
whatever75 Posted July 5, 2022 Author Share Posted July 5, 2022 Closing this out. Put in another Z2IO, R1 now works with the garage door as I wanted. It was a bad relay in the other unit. Quote Link to comment Share on other sites More sharing options...
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