Why is the s30 showing an hvac system not found message

The hvac system not found message on your s30 could be due to a few reasons. it could be that the system is not able to detect a previously installed component. here are some steps you can follow to troubleshoot this issue: check all system components (devices) connections to make sure they are icomfort®-compatible. cycle system power. if the problem persists, then check all system components (devices) connections to make sure they are icomfort®-compatible. go to menu > advance settings > view dealer control center > equipment and press reset all equipment. this will allow the system to auto-detect any icomfort® components attached. cycle system power, and if the problem persists then clear by reconfiguring the system. in a previous case, a similar issue was resolved by checking the voltage between i plus and common and i minus in common at the zone board. if the readings are lower than the expected 2.5 volts, it could indicate an issue with the smart hub dragging down the voltage. in such a case, replacing the smart hub resolved the issue. please refer to the 'lennox icomfort s30 installation manual setup guide' for more detailed information. if the issue persists, i would recommend reaching out to lennox technical support for further assistance.