T Max Error 4 - Dreaded Orange Light

My SunAngel room cannot seem to communicate with the TMax via the wireless receiver. The Manager Pro indicates a "Error 4," which, according to the manual, means that it's reporting an incorrect max time. I checked SunLync, and the max time is correct at 15 minutes.

Here's a photo of the Manager, showing room 11 which is the trouble. HELP!

Attached Images

20130203_110048.jpg (89.0 KB)