[b]Di2 two flashing red lights[/b]

[primagonracing]

I have recently seen two red flashing lights on my Di2 junction. This happened while shifting during riding. It appeared twice, then all seems normal.
Any suggestions what this might be?

Ola

[Stolichnaya]

I think that double red means Skynet is going active and the machines are rising...
Oh wait, this is Di2, I was thinking T2.

[Geoff]

That sounds like your system is in 'crash protection' mode. Try holding the button on the junction box down for 5 seconds.

[kx_1]

It is the battery. It means that you around half i think...check the manual, it is writter inside.. 5 reds means you are out completely

[primagonracing]

To clarify: BOTH lights flashes red simultaneously, that´s not the battery warning when one light flashes red. I can´t find this one in the Shimano manual!
-Maybe it´s a malicious virus planted by my competitors.

[primagonracing]

This strange indication reappears now and then! -Any clues out there?

[StuTheWeak]

Change the oil light?

[thisisatest]

it's likely an intermittent short.
i would first inspect the wires, end-to-end, especially anywhere it's ziptied. a very tight ziptie can cut a wire. if all is well, i'd unplug everything, inspect the connectors, and put a touch of dielectric grease on the plastic plug seals (but not really on the pins themselves...)
if that fails, try a different wire kit or, better yet, a diagnosics box.

greg

[Johhny Bravo]

that's exactly what was happening with mine - and then it got worse: started shifting by itself:

http://fairwheelbikes.com/forum/viewtopic.php?f=3&t=9008&p=103117#p103117

[lovej]

Does it happen in any particular gear?

may be the der hitting one of the limit screws?