Nilfisk-Advance Advance SC400 Service Manual

Also see for Advance SC400: Operating guide Operating guidelines Instructions for use

Nilfisk-Advance Advance SC400 Service Manual Manual pdf 49 page image

Scrub System, Disc49Service Manual – SC400Scrub System, DiscFunctional DescriptionThe disc brush system can be started by the operatorThe disc brush rotates counter-clockwiseThe brush system, when turning, cleans/washes thefloor surface and assists machine forward movement.The deck, where brushes suitable for cleaning theparticular type of floor are installed, is the main partof the scrub system. The brush deck is fixed and inte-grated in the machine with a support bracket The ad-justing systems adjusts the forward speed, while thehandwheel on the deck adjusts the machine straight-forward driveThe brush working pressure is functional to the ma-chine designed balanceThe brush motor (M1) is supplied by the electromag-netic switch (K1) which is driven by the function elec-tronic board (EB1) when the rotary switch (SW1) isturned to 1 or 2, and the brush enabling push-button(SW2) is pressed The circuit is protected by the fuse(F1) and by the electronic protection system describedin the Function Electronic Board Specifications chap-terThe system, once activated, uses the solution comingform the solution system, to wash the floor.In case of brush motor overload, a safety system stopsthe brushes after about one minute of continuousoverload The overload is shown by the three batterywarning LEDs flashing simultaneously.The overload is detected by monitoring the currentflow sum on the motor. The current is measured bychecking the voltage drop through the fuse (F1) If thevoltage drop is higher than 40 mV, the 3 battery LEDsflash simultaneously and, if the overload persists, themotor stops after a variable delay, depending on theoverload amountTo start scrubbing again after a brush stop due tooverload, cycle the rotary switch (SW1) off and thenback onTo work properly, the brush motor needs the follow-ing:• Rotary switch (SW1) turned to 1 or 2• Brush enabling push-button (SW2) pressed• Charged batteries (the red LED must not beflashing).BRUSH RELEASE SYSTEM:In order to release the brush from its hub, the brushmotor starts running, then it is stopped quickly.Therefore the brush due to its inertia is disengagedfrom the hub The system works better if the brushdeck is lifted from the floor during this operation.Wiring DiagramBRUSH ENABLINGPUSH-BUTTON (SW2)ROTARY SWITCH(SW1)FUNCTION ELECTRONICBOARD (EB1)J2.3 - Brush electromagnetic switch power supply –J2.5 - Electromagnetic switch/relay power supply +J2.6 - Brush motor braking circuitJ3.1 - Control power supplyJ3.2 - Brush function returnJ3.4 - Brush rotation enablingBRUSH MOTORFUSE (F1)BRUSHELECTROMAGNETICSWITCH (K1) BRUSHMOTOR (M1)J2.1 - Brush fuse voltage drop reading +J2.2 - Brush fuse voltage drop reading –BRUSHELECTROMAGNETICSWITCH (K1)B - B +SIGNAL CIRCUITFUSE (F3)+ 24VBRUSH RELEASEFUSE (F4)+ 24VB -P200079