Hoping someone out there has seen this before, getting an Error Code-6, both green top lights blinking which means no communication between control unit and control switch panel. I have used a meter and verified all wires in Data Link have continuity. All connections are clean and tight, and system was working flawlessly all season. I tried to recalibrate but it will not move any of the blades before trouble code comes back on. There is definitely battery voltage at the control unit and power at the switch. Any thoughts or troubleshooting steps to take next? Thanks for any info.