USER MANUAL ENGLISH9098960000(1)2011-04 A SCRUBTEC R 466 - R 471 - R 471C - BOOST ® R4 29TROUBLESHOOTINGTROUBLE POSSIBLE CAUSE REMEDYThe motors do not work; no warning light turns on. The battery connector is disconnected. Connect.The batteries are discharged. Charge the batteries.The machine does not move and the display (71)shows the error code: The machine has been turned on by using theignition key and by keeping the pedal pressed.Release the drive pedal.If the problem persists, contact an authorisedService Center.At the machine start-up, the LED (64) of theswitch (63) flashes and the brushes do not work.The machine has been turned off withoutlifting the brush deck.Wait for the deck to lift before turning on againthe brushes by pressing the switch.The brushes do not work; the red warning lightflashes. The batteries are discharged. Charge the batteries.The 3 warning lights (62) flash simultaneously.The brush motors are overloaded. Use less aggressive brushes and/or avoidworking with extra pressure turned on.There are foreign materials (tangled threads,etc.) preventing the brushes from rotating. Clean the brush hubs.The display (71) shows an error code as:where “00” is replaced by a code different from“t4”.The machine electronic control system is inalarm condition.Turn off the machine and then turn it on again.If the problem persists, contact an authorisedService Center.The dirty water vacuuming is insufficient.The recovery tank is full. Empty the tank.The vacuum grid is clogged or the float isclosing. Clean the vacuum grid.The container with debris collection grid isclogged. Clean.The hose is disconnected from the squeegee. Connect.The squeegee is dirty, or the squeegee bladesare worn or damaged.Clean the squeegee or overturn/replace theblades.The tank cover is not properly closed, or thegasket is damaged.Correctly close the cover or clean/replace thegasket.The solution flow is insufficient.The solution tank is empty. Refill.The solution filter is dirty. Clean the filter.The Chemical Mixing System tank (optional)is dirty/clogged. Clean with the drain cycle.The squeegee leaves marks on the floor.There are debris under the squeegee blades. Remove the debris.The squeegee blades are worn, chipped ortorn. Overturn or replace the blades.The squeegee is not balanced with thehandwheel. Adjust the squeegee.NOTEIf the machine has a battery charger installed, the machine cannot operate if the charger is not on board. In case ofbattery charger malfunction, contact an authorised Service Center.For further information, contact Nilfisk Alto Service Centers.