I've got an old Comfort I system. The main PCB has a chip labelled “Outside 4.169” A006166. The slave SEP modules have a chip labelled First 4.164. The SEP PCB is SM0223.
I've noticed that when arming or disarming the S12V connection on the SEP does not switch off, whereas it does on the main CPU. I suspect this might have always been happening. Both SEPs exhibit the same the problem, so I don't think it's a faulty PCB.
I found in the forum that there may be a jumper that needs removing (J7). I removed that, pressed the SEP reset button and tried again, but no luck. Have I got the right jumper?
I know it's a very old system but as it's functioning perfectly other than this, I'm reluctant to upgrade it.
Last edited on Wednesday Oct 4th, 2017 09:41 pm by timraynor
I've got some spare cores between the main panel and the SEPs, so I was thinking of connecting S12V on the panel to a relay in each SEP (via the spare cores). The relay would then switch the S12V connection on/off at the SEP.