Nilfisk-Advance R 253 9087362020 Service Manual

Contents

Control System19Service M anual – Scrubtec R 2 5 3 - R A 4 0Control SystemFunctional DescriptionThe architecture of the electronic control system forthe machine’s electrical components is composed ofa function electronic board (EB1) and a display elec-tronic board (EB2), in turn connected to a dashboardinstrument electronic board (EB4) which representsthe main user interface.The function electronic board (EB1)Function electronic board (EB1)manages all components and drives the followingcomponents directly:- Brush motor (M1)- Vacuum system motor (M2)- Drive system motor (M3) with the relevantElectromagnetic brake (BRK)- Detergent pump (M4)- Deck actuator (M5)- Squeegee actuator (M6)- Solution flow solenoid valve (EV1)The horn and the beep reverse is an integral part ofthe function electronic board (EB1).The display electronic board (EB2)Display electronic board (EB2)Flat cable from (EB2) to (EB4)serves mainly as an aggregator for all input signals(buttons) and outputs (LEDs) from the dashboard in-strument electronic board (EB4),Dashboard electronic board (EB4)which it is connected to via 2 flat cables.The ignition key (SW1) is inserted in relevant slot onthe steering column,The display electronic board (EB2) sends all the in-put signals from the Dashboard instrument electronicboard (EB4) to the function electronic board (EB1) us-ing 2-wire 2-way serial communications protocol.The system is completed by the on-board batterycharger (see the Electrical System chapter) whichalso uses a proprietary serial protocol to communicatewith the function electronic board (EB1), in order todisplay its operating status (charging phase) to theoperator on the LCD display.https://harrissupplyind.com - To Order Parts Call 608-268-8080