If you use the "signal LEDS Blue" option on System menu page 3 know that your output LED will be red. The input LED is Blue, but the output LED is red. Simple code mistake, but caused me a bit of rustling around. My ear said all was ok, but I still had to track it down.
I searched, but didn't see anything. Hope this helps.
Power Head version: 220.127.116.1146