During initialisation it shows dat there is jam

During the warm up cycle the carriage has to reach both ends of the scan platten if for any reason it is not able to achive this it throws the error Paper jam or 86:01 ( both mean the same thhing)
what you need to do:-
1) disconnect the plotter from the mains
2) open the central lid and using a torch look carefully along the carriage path for any obstacles or debris that may interfere with the carriage motion.
3) assuming there is no obvious blockages look carefully at the carriage drive belt to see if the imprinted teeth have worn off you may also see what looks like mouse droppings on the print platen
4) remove the right end cap - move the sercvice staion out of the way of the carriage and then gently ease the carriage to both left and right extents checking all the while for debris, leave the carriage on the left and leave the service station out of home position, return the mains lead and allow th plotter to initialize checking to see if the plotter is able to move both assemblies as required.if not then call out a qualifed enginner to replace defective drive belt or carriage assembly or indeed the service station