3. The speed indication L.E.D.s on my VSI controller are moving rapidly from left to right & back again. Has the unit developed a fault?

No! The VSI is simply in a locked state. TÜV requires that the powerchair must have a means of preventing unauthorized use. This can be implemented electronically via a sequence of key presses and joystick movements. This method has been chosen to prevent problems arising from lost keys. Details of the locking & unlocking sequence can be found in the VSI technical manual.

Please click here to see the VSI lock 'pattern'.