USER MANUAL33015501(2)2006-10 A 31SAFETY FUNCTIONSThe machine is equipped with the following safety functions.REVERSE GEAR BUZZERThe machine is equipped with a sensor and a buzzer to indicate that the machine is moving in reverse.HOPPER LIFTING/LOWERING LEVER SAFETY FLANGEThe hopper lifting/lowering lever can be activated only after having lifted the safety flange.SUCTION INLET AND BROOM LIFTING/LOWERING LEVER SAFETY FLANGEThe suction inlet and broom lifting/lowering lever can be activated only after having lifted the safety flange.SENSOR FOR ENGINE START-UP INHIBITION WHEN THE DRIVE PEDAL IS PRESSEDThe machine is equipped with a sensor that do not allow for engine start up when the drive pedal is pressed.TROUBLESHOOTINGThe following table shows the most common problems that may arise during the use of the machine, the possible causes andthe suggested remedies to solve them.For explanation or information, contact a Nilfisk-Advance Service Center.PROBLEMS AND REMEDIESNOTEThe sweeper is equipped with 3 “minitest” plugs (1, 2 and 3, Fig. AN) to measure the hydraulic pressure onthe component.WARNING!The suggested remedies must be performed by qualified personnel, according to the instructions shown inthis Manual, if present, otherwise contact a Nilfisk-Advance Service Center, where it is possible to consultthe Service Manual.Problem Possible cause RemedyBROOMSThe brooms do not clean correctly The brooms are not adjusted correctly AdjustThe brooms do not rotateBroom speed is not correct Adjust the speedOil leaks from the hydraulic systemfittings/hoses Repair/replaceHydraulic motor failure ReplaceThe accessory system pump does notpressurize the oil in the circuitCheck the oil pressure in the hydraulicsystemSUCTION FANThe suction fan is noisy Hydraulic motor failure RepairThe suction fan rotates but suction is notefficientClogged dust filters CleanClogged suction pipe CleanCut/torn suction pipe ReplaceBroken or wrongly positioned gasket betweenthe suction inlet and the hopper Replace/adjustLack of pressure in the suction fan motordrive pump Adjust the pump pressureThe suction fan does not rotateStuck control valve assembly RepairMotor failure ReplacePump failure Replace