These are called VSI error lights. The VSI is the fancy name for your electronic controller. [Basically the joystick :) ] The number of times they are flashing, gives you the codes of the problem. The system locks until it is sorted to prevent injury. Follow the link below for the User Manual for your model. First check page 37 to see if it isn't just locked, then page 38 for code meanings. If its flashing lots, most of those high numbered ones are just a case of checking things are all plugged in tight.
http://www.rentascooter.com/downloads/_manuals/pridemobility/Pride%20Jazzy%201103%20Ultra%20Owner%27s%20Manual.pdf
Hope this helps.