It would be worth checking the physical adjustment of the pedal solenoids (instructions are inside the pedal solenoid cover), just in case something has moved, but failing that, it's likely to be an electronic fault.
athomik
On Oct 22 2012, Carol Beigel wrote:
>It could also be caused by the pedal solenoid overheating and shutting the whole system down.. That can happen because the pedal is out of adjustment.
>
>Carol Beigel
>