ENGLISH SERVICE MANUAL30 909 6510 000(3)2007-12 Razor Blade 26D / 28D / 28CBRUSHING SYSTEMTROUBLESHOOTINGOPEN CIRCUITThe fuse (F1) causes an open in the function electronic board supply circuit. This system prevents the circuits from being damagedin case of failure.If there is an open in the fuse, the possible causes are:The function electronic board wiring harness is damaged or shorted (check the power cables on the function electronic boardand the relevant connections).The function electronic board is damaged (replace).ALL BRUSHES DO NOT TURNPossible causes (see also the Electrical System chapter, function electronic board diagnosis):The function electronic board wiring harness or the brush motors are damaged (repair).The function electronic board is damaged (replace).The brush motor is shorted (replace).ONE BRUSH DO NOT TURNPossible causes:The motor carbon brushes are worn (replace).There are bulky debris or cords around the brushes or between the brushes and their flanges (remove the brushes and thedebris).The motor is faulty (repair or replace).The wiring harness is damaged (repair).THE BRUSHES CANNOT BE LIFTED/LOWERED OR THE EXTRA PRESSURE FUNCTION CANNOT BE TURNEDONPossible causes (see also the Electrical System chapter, function electronic board diagnosis):The deck lifting/lowering actuator end-of-strokes are not properly adjusted (adjust).The deck lifting/lowering actuator end-of-stroke microswitches are broken (replace the actuator).The deck lifting/lowering actuator is broken (replace).There is an open in the actuator wiring harness (check the connections according to the procedures shown in the ElectricalSystem chapter, Troubleshooting paragraph).THE MACHINE DOES NOT COLLECT THE SOLUTION COMPLETELYPossible causes:The side skirts are not properly adjusted (adjust/replace).1.2.1.2.3.1.2.3.4.1.2.3.4.1.
