The RS232 interface may still execute commands. Without the power specifed in the troubleshooting steps below, no guarantee can be made as to the accuracy or consistency of data received from the RS232 interface. If you don't have the cable, the following table lists the connections you need to make one. LED 1 on the Lutron RS232 interface does not light. Problem Possible Cause Troubleshooting Steps LED 1 is not lit.
Main units are unaddressed.
You must have at least one addressed main unit in your system. Interface seems to be powered, but doesn't execute commands. Troubleshooting Steps Commands not being executed. Incorrect MUX link wiring. Link wires are swapped or not connected properly.