Re: I/O Linc Garage Door Control Sensor not responding
Unfortunately, it means that the I/O Linc isn't responding to the PowerLinc's request for it's engine version. Most likely this is due to a signal issue between the two. Try moving your two access points around to see if you can get a cleaner signal path between them. You'll want to follow the pairing instructions for them to make sure you have the two phases bridged appropriately.
Check out the signal troubleshooting page
for other common causes and solutions to signal issues.