Strange error message, so bike wont work, anyone help.

[G5rry]

My conversion kit has decided to go wrong and I'm a bit stumped.
I get the message come up on the display as shown below, on the journey home last night although seemingly running fine it did start to beep (this appeared to happen after I throttled whilst going at speed downhill) and as I got in the motor kicked in at full speed without me using the throttle.
It can be quite difficult to even get the display to turn on and it always displays the error, if I unplug the throttle and put it back together the wheel just spins at full speed until I shut it down, anyone got any ideas, it's a Boss system connected to a Sparticle front wheel.

 

[G5rry]

Solved.
The bike shop suggested I required a new Boss controller.
I had a little wiggle on the cables to the controller and the message would disappear then reappear and set the wheel spinning at full speed.
Made me think there was a loose connection somewhere, opened it up and a black wire to ground had broken off inside, re-soldered it on and made the cables more secure and all now seems ok.
Relieved to say the least.
Thought I'd post the solution in case anyone else has something similar.