Service Manual
Contents
1. FUSES Q aja O Sc lam t ajo wb a o 0 Eu 09 Tele gt nia OI aja O aja O b nia n ICT Sl E m ES e de o Code Description Type Size F3 Low consumption circuit fuse LITTELFUSE ATOFUSE 5A F4 Brush release circuit fuse OMEGA CT520320 20A DIP SWITCHES O Del O aa 8 ooooo taal ES LISS ua ETE KEE IECH H ojo IC naa n o a CIDOC Q SH T Cal Jo S EE E Qum ce T9 O l alfo Li O a Ra CH ojo 2m x O Ej n 1 1 I E 7 X TAA o i X NE I I o ss o 1 n gt x i el C ol Y UM m 8 E ow s Bam E m MM Q n0000 O Code Description DIPA WET GEL selector DIP2 Battery charger enabling Service Manual SC400 Function Electronic Board EB1 Connectors J1 MOLEX MINIFIT type 6 ways vertical O 00SV832Z2. SO ofz Con jo 13 D CD DU 5 E Ova Electronic board Ji Control System Description in out Connected to 1 Electronic board power supply in 24V 5A BAT 2 Solenoid valve power supply out 24V 1A EV1 Solenoid valve power supply out OV 1A EVI 4 Not used 5 Not used 6 Not used 25 Service Manual SC400 Function Electronic Board EB1 Connectors Continues J2 MOLEX MINIFIT type 8 ways vertical O Control System SN O T uy gt Ol O O aa a 000 Jg ME E L ol a a g aj d CSS Bst obs RRE O Description Electronic board Connected to in out 1 Brush fuse voltage drop reading in OV lt 1A F1 2 Brush
3. Handlebar with control panel 75 7 Recovery water drain plug S Recovery water drain hose bracket CS Recovery water drain hose 44 ES Electrical component box Battery charger Solution drain hose with level check marks Battery connector red Serial number plate technical data conformity certification Squeegee vacuum hose Squeegee mounting handwheels gt LO Squeegee blade mounting springs Squeegee lifting lowering pedal Squeegee Rear squeegee blade Front squeegee blade Rear support wheel when the squeegee is lifted Solution filter Central wheels on fixed axle Brush Brush deck Parking wheel Parking wheel positioning pin P200042 Service Manual SC400 General Information 11 Machine Nomenclature Continues Recovery tank cover open Recovery tank cover gasket Vacuum grid with automatic shut off float Battery Recovery tank compartment connection diagram Detergent removable filler hose Batteries Front brush support Lifted squeegee Vacuum system motor Brush motor Machine forward speed adjusting handwheel Machine straight forward Brush movement adjusting handwheel d Pad holder Brush rotation direction P200003 Service Manual SC400 General Information 12 Handlebar with Control Panel Program brush solution Program selection knob rotary switch flow activation Program brush vacuum system solution flow activation
4. Scrub System Disc 54 amperage Check that the brush hub is free from foreign materials ropes dirt preventing it from turning Check that the brush motor fuse F1 1s prop erly tightened Check the condition of the brush motor car bon brushes Remove the brush motor see the procedure in the Brush Motor Disassembly Assembly paragraph and check the condition of all its components If the above mentioned procedures do not produce the correct readings for the brush motor amperage the motor must be replaced see the procedure in the Brush Motor Disassembly Assembly paragraph Reassembly 5 Assemble the components in the reverse order of disassembly P200061 Service Manual SC400 Scrub System Disc 55 Brush Motor Carbon Brush Check Replacement Disassembly Check 1 Remove the recovery tank as shown in User Manual Loosen the band A and disconnect the hose B from the vacuum system motor below Remove the guard C On the brush motor D if necessary remove dirt form the area of the four carbon brush covers E Turn and remove the four covers E bayonet joint Remove the carbon brush nuts F with the lead in wires Disengage the tabs G and remove the carbon brushes H 8 Check the carbon brushes H for wear The carbon brushes are worn when The contact with the motor armature is insuf ficient The contact surface is not integral The stroke i
5. Brush lever Handlebar with control panel LED indicators for solution quantity battery charge Machine start up enabling push button SW2 LED electronic board EBLED Wiring harness Function electronic board EB 1 Low consumption circuit fuse F3 P200045 Service Manual SC400 Removal and Installation Control System 20 Function Electronic Board EB1 Disassembly Assembly Disassembly 1 Drivethe machine on a level floor Make sure that the machine cannot move independently 2 Turn the machine program selection knob to 0 3 Disconnect the battery connector red 4 Disconnect the battery charger cable from the holder A 5 Remove the screws B and remove the cover C Fitting WET batteries GEL AGM batteries Battery charger installed standard Battery charger not installed SA Note c DIP switch DIP 1 DIP 2 6 Disconnect the connectors D of the function electronic board E 7 Remove the screws F and remove the function electronic board E Assembly 8 Assemble the components in the reverse order of disassembly and note the following Set the DIP switches G according to the machine fitting as shown
6. BRUSH ELECTROMAGNETIC SWITCH K1 BRUSH ENABLING PUSH BUTTON SW2 MOTOR M1 ROTARY SWITCH swi Scrub System Disc 49 overload The overload is shown by the three battery warning LEDs flashing simultaneously The overload is detected by monitoring the current flow sum on the motor The current is measured by checking the voltage drop through the fuse F1 If the voltage drop 1s higher than 40 mV the 3 battery LEDs flash simultaneously and if the overload persists the motor stops after a variable delay depending on the overload amount To start scrubbing again after a brush stop due to overload cycle the rotary switch SWI off and then back on To work properly the brush motor needs the follow ing Rotary switch SWI turned to 1 or 2 Brush enabling push button SW2 pressed Charged batteries the red LED must not be flashing BRUSH RELEASE SYSTEM In order to release the brush from its hub the brush motor starts running then it is stopped quickly Therefore the brush due to its inertia is disengaged from the hub The system works better if the brush deck is lifted from the floor during this operation 112 1 Brush fuse voltage drop reading 12 2 Brush fuse voltage drop reading 2 3 Brush electromagnetic switch power supply 12 5 Electromagnetic switch relay power supply BRUSH RELEASE i F4 24
7. Program vacuum system activation Machine switching off 0 e Handlebar inclination n i f B can lever i Brush lever Brush lever LED indicators for solution quantity Machine start up enabling Solution flow push button battery charge push button The brush levers operate only after pushing the machine start up enabling push button P200044 Service Manual SC400 General Information 13 Service and Diagnostic Equipment Besides a complete set of standard meters the following instruments are necessary to perform fast checks maintenance and repairs on Nilfisk Advance machines Besides a complete set of standard meters the following instruments are necessary to perform fast checks and repairs on Nilfisk Advance machines Laptop computer charged with the current version of EzParts Adobe Reader and if possible Internet connection Digital Volt Meter DVM Amp clamp with possibility of making DC measurements Hydrometer Battery charge tester to check 12V batteries Static control wrist strap Dynamometric wrench set Acopy of the User Manual and Spare Parts List of the machine to be serviced provided with the machine or available at www advance us com or other Nilfisk Advance websites The following equipment is also available at Nilfisk Advance Centers
8. Battery Charging SC Note Charge the batteries when the yellow or red LED turns on or at the end of each working C cycle Keeping the batteries charged make their life last longer Caution When the batteries are discharged charge them as soon as possible as that condition makes their life shorter Check for battery charge at least once a week hydrogen gas Charge the batteries in well ventilated areas and away from naked Caution When using lead WET batteries battery charging produces highly explosive flames Do not smoke while charging the batteries Do not reinstall the recovery tank until the battery charging cycle is over Caution Pay careful attention when charging lead batteries WET as there may be battery fluid leakages The battery fluid is corrosive If it comes in contact with skin or eyes rinse thoroughly with water and consult a physician 1 Drivethe machine to the appointed recharging area 2 Turn the machine program selection knob to 0 3 For WET batteries only lt Tip up the recovery tank Check the level of electrolyte inside the batteries if necessary top up through the caps Leave all the battery caps open for next charging Ifnecessary clean the upper surface of the batteries 4 Connect the battery charger cable to the electrical mains the electrical mains voltage and frequency must be compatible with the battery charger values shown on the machine serial number plate Y Note
9. CONNECTOR C1 MN EM P rem Se J4 1 Battery charger enabling power supply J4 2 Battery charger enabling return FUNCTION ELECTRONIC BOARD EB1 BATTERY CONNECTOR C13 B 24V BATTERY BAT BATTERY CHARGER CH BATTERY FUSE FO P200076 Service Manual SC400 Electrical System 33 Component Locations Battery charger CH Battery fuse F0 only for 9087311020 Batteries BAT 9087318020 models Battery connection connector C1 Brush motor fuse F1 Battery wiring harness Vacuum system motor fuse F2 Machine wiring harness Solenoid valve and electronic board fuse F3 Electrical component box Brush release fuse F4 Battery charger CH Brush release Brush motor Y fuse F4 fuse F1 K A A ei amp Solenoid valve and S electronic board fuse F3 ES Z Electrical x E component E box V YE il d 6 ed CP NIE Si Battery connection connector C1 Machine wiring harness Vacuum system motor fuse F2 Batteries BAT Battery wiring harness Battery fuse FO only for 9087311020 9087318020 models P200050 Service Manual SC400 Electrical System 34 Maintenance and Adjustments Battery Installation And Battery Type Setting WET or GEL AGM Set the electronic board of the machine and the battery charger according to the type of batteries to be in stalled WET or GEL AGM as s
10. G Open the valve A by turning it to position C prem P200068 Service Manual SC400 Troubleshooting Trouble Possible Causes Solution System Small amount of solution or no solution reaches the brush The tank filter optional is clogged dirty Clean The solution filter is clogged dirty Clean The solenoid valve EV1 is faulty or the electrical connection is open Replace the solenoid valve or repair the electrical connection There is dust debris in the tank or in the detergent hoses Clean the tank hoses obstructing the solution flow There is an open in the solenoid valve fuse electronic board F3 Replace The solution reaches the brush also when the machine is off The solenoid valve EV1 is dirty broken Clean replace Specifications General Values Solution tank capacity 6 0 US gal 23 liters Min max solution flow 0 1 0 42 gpm 0 4 1 6 liters min Solution valve winding resistance 50 Q 24V Nilfisk S Advance Service Manual SC400 Squeegee System Functional Description The squeegee system cleans the liquid off the floor which 1s then collected by the recovery system The squeegee is equipped with wheels the pressure of the blades on the floor depends on a gas spring built in the support and on the weight of the system The squeegee is fastened to the machine
11. Vacuum water lift gauge P N 56205281 Service Manual SC400 General Information Technical Data Nilfisk GES Advance Nilfisk General SC400 43 B SC400 17 B FULL PKG SC400 43 B Solution tank capacity 6 0 US gal 23 liters Recovery tank capacity 5 5 US gal 21 liters Machine length 48 4 in 1 230 mm Machine width with squeegee 28 3 in 720 mm Machine width without squeegee 22 4 in 570 mm Min max machine height with adjustable handlebar 28 5 43 9 in 725 1 115 mm Minimum turning radius 29 5 in 750 mm Cleaning width 17 in 430 mm Diameter of wheels on fixed axle Wheel pressure on the floor 9 8 in 250 mm 290 psi 2 N mm Brush pad diameter Brush pressure with full tank and lowered squeegee 17 in 430 432 mm 77 lb 35 kg Min max solution flow Sound pressure level at workstation ISO 11201 ISO 4871 EN 60335 2 72 LpA 01 042 gpm 0 4 1 6 liters min 65 dB A 3 dB A Machine sound pressure level ISO 3744 ISO 4871 EN 60335 2 72 LwA Vibration level at the operator s arms ISO 5349 1 EN 60335 2 72 89 dB A 98 4 in s 2 5 m s Maximum gradient when working 2 IP protection class x4 Protection class electric Vacuum system motor power 0 4 hp 300 W Vacuum water lift blocked 47 2 inH O 1 200 mmH O Brush motor power 0 6 hp 450 W Bru
12. and the rear neutral color blade E Install the mounting springs C on the front and rear blades Check that the front blade D and the rear blade E are integral and free from cuts and lacerations if necessary replace them Also check the front corner F of the rear blade E for wear if it is worn overturn the blade to replace the worn corner with the other one G if it is integral If the other corner 1s worn too replace the blade Squeegee side ruled side outside 1 Caution Mount both front and rear blades with the smooth side H toward the internal 4 Assemble the squeegee see the procedure in the relevant paragraph a al P200071 Service Manual SC400 Troubleshooting Trouble Possible Causes Squeegee System 69 The recovery water vacuuming is insufficient or there is no vacuuming The squeegee or the vacuum hose is clogged or damaged Clean repair replace There is debris under the blade Remove The squeegee blade edges are torn or worn Replace The gas spring is not efficient Replace Service Manual SC400 Squeegee System 70 Removal and Installation Gas Spring Disassembly Assembly Disassembly 1 pU Gs po me If possible place the machine on a hoisting system or on a floor with a suitable step in order to fully stretch the gas spring A of the squeegee support system B beyond the support
13. the ANDERSON POWER connector C1 Fuses The brush motor circuit is protected from short cir cuits by the 40A fuse F1 The motor is protected from overloads by means of the electronic protection system described in the Function Electronic Board Specifications chapter The vacuum system motor circuit is protected by the 30A fuse F2 The solenoid valve EV1 and the function electronic board EB1 control circuits are protected by the 5A fuse F3 on the function electronic board EB1 Wiring Diagram Electrical System The battery charger CH is connected to the batteries BAT directly on the and terminals and it sup plies the enabling signal to activate the machine func tions only when it is disconnected from the electrical mains with the J4 2 way connector When the battery charger 1s connected to the electrical mains the bat tery charger inner relay opens the contact and stops the enabling signal on the J4 connector For further details see the descriptions of individual sub systems The brush release circuit is protected by the 20A fuse F4 on the function electronic board EB1 Only for 9087311020 9087318020 models The 125A battery fuse FO is assembled directly on the terminal of the battery and jump connected to the negative terminal of the other This fuse operates only in case of short circuits on the machine power wiring harness to prevent fire or battery explosion BATTERY E
14. LDA Green anode LED power supply in 0 7V lt 1A J3 8 3 LDB Yellow anode LED power supply in 0 7V 1A J3 9 4 LDB Green anode LED power supply in 0 7V 1A J3 10 5 LDC Red anode LED power supply in 0 7V 1A J3 11 6 LDC Green anode LED power supply in 0 7V 1A J3 12 LED Electronic Board EBLED Specifications Description GREEN RED two color 5mm LED LDB GREEN YELLOW two color 5mm LED LDC GREEN RED two color 5mm LED Service Manual SC400 Control System 29 Controls and Functions a Low consumption circuit fuse F3 directly downstream of J1 1 it protects all the inner and outer circuits supplied by the electronic board b Battery charger enabling circuit power supply J4 1 directly downstream of F3 c BATTERY CHARGER enabling J4 2 if the dip switch DIP2 is turned to 0 CH position the electronic board functions are activated only when the on board battery charger is NOT connected to the electrical mains if DIP2 is turned to 1 NO CH position the electronic board functions are active whether or not the battery charger is on board THE BATTERY CHARGER IS INSTALLED ON THE MACHINE AS A STANDARD COMPONENT the dip switch MUST BE turned to 0 CH position d BRUSH function is activated when J3 2 is at 24V with a 1 sec delay at switching off The BRUSH function includes activation of J2 3 BRUSH ELECTROMAGNETIC SWITCH and J1 2 3 SOLENOID VALVE outputs which are subjected to th
15. Motor ficient Disassembly Assembly paragraph The contact surface is not integral The stroke is less than 0 12 in 3 mm 2 Atthe workbench remove the vacuum system KE The spring is broken motor guard A by disengaging its inner fasteners B In this cases replace both motor carbon brushes 3 With a proper tool remove the tin soldering spot C between both lead in wires D Assembly 4 Disconnect the lead in wires D 7 Assemble the components in the reverse order of disassembly and note the following 5 Remove the screws E and remove the carbon after connecting the lead in wires D fasten brushes F them with a tin soldering spot C P200056 Service Manual SC400 Recovery System 47 Vacuum System Motor Disassembly Assembly Disassembly 1 Remove the recovery tank Loosen the band A and disconnect the hose B from the vacuum system motor below Remove the guard C 2 3 4 Disconnect the connector D of the vacuum system motor E 5 Remove the screws F then lift them from the housing and remove the vacuum system motor E 6 If necessary remove the sound proof panels G and H from the motor Assembly 7 Assemble the components in the reverse order of disassembly P200057 Service Manual SC400 Recovery System 48 Specifications General Values Recovery tank capacity 5 5 US gal 21 liters Vacuum system motor power 0 4 hp 300 W Vacuu
16. When the battery charger is connected to the electrical mains all machine functions are SG automatically cut off The battery charger red or yellow LED turned on indicates that the batteries are charging 5 When the battery charger green LED stays on the battery charging cycle 1s over 6 When the battery charging is completed disconnect the battery charger cable from the electrical mains and wind it round its housing 7 For WET batteries only Close all the battery caps Tip down the recovery tank 8 Now the machine is ready to be used Charger Manual e Note For further information about the operation of the battery charger see the Battery Sc Service Manual SC400 Electrical System 37 Fuse Check and Replacement Fuses in the electric component box 1 Drive the machine on a level floor Make sure that the machine cannot move independently 2 Disconnect the battery connector red 3 Remove the screws A then remove the electrical component box cover B 4 Check the following fuses for integrity C F1 40 A circuit breaker brush motor open cover D F2 30 A blade fuse vacuum system motor E F3 5 A blade fuse solenoid valve and electronic board F F4 20 A glass fuse brush release system 5 Replace the open fuse when the component that caused deactivation has fully cooled down 6 Place the cover B and tighten screws 7 Connect the battery connector red Battery Fuse only f
17. fuse voltage drop reading in OV lt 1A F1 3 Brush electromagnetic switch power supply out OV 1A ES1 4 Vacuum system relay power supply out OV 1A ES2 5 Electromagnetic switch relay power supply out 24V 2A ES1 ES2 6 Brush motor braking circuit in 24V 100A imp 0A cont ES1 NC 7 Electronic board power supply in OV 5A BAT 8 Not used 26 Service Manual SC400 Function Electronic Board EB1 Connectors Continues J3 MOLEX MINIFIT type 12 ways vertical mM DODO LO O O T QU ojo gt elle D Ol ollo 9 SIE E m E EIS US Jio alam EJ a DO Hee coo E KENG p y OF ooo ova Sa Description Electronic board in out Control System Connected to 1 Control power supply out 24V 1A SW1 2 3 2 Brush function return in 24V lt 1A SWI 3 Vacuum system function return in 24V 1A SW1 4 Brush rotation enabling in 24V 1A SW2 5 Water push button return in 24V 1A SW3 6 Not used 7 Common cathode LE
18. knob D Assembly 9 Assemble the components in the reverse order of disassembly P20048 Service Manual SC400 Control System 23 Machine Start up Enabling Push Button Disassembly Assembly SW2 Disassembly 1 Drivethe machine on a level floor Make sure that the machine cannot move independently 2 Turn the machine program selection knob to 0 3 Disconnect the battery connector red 4 On the lower side of the handlebar with the control panel unscrew the screws A 5 Move the upper side B of the handlebar with the control panel 6 Remove the screws C and move the lower side D of the handlebar from the frame E 7 Disconnect the connectors F of the brush enabling push button G 8 Remove the screws H and remove the switch G 9 If necessary remove from the housing the enabling push button 1 of the switch G 10 If necessary remove the brush levers J from the housing Assembly 11 Assemble the components in the reverse order of disassembly P200049 Service Manual SC400 Control System 24 Specifications Function Electronic Board EB1 Specifications
19. not to cause damage to people or objects Do not bump into shelves or scaffoldings especially where there is a risk of falling objects Do not lean liquid containers on the machine use the relevant can holder The machine working temperature must be between 0 C and 40 C The storage temperature must be between 0 C and 40 C The humidity must be between 30 and 95 When using floor cleaning detergents follow the instructions on the labels of the detergent bottles To handle floor cleaning detergents wear suitable gloves and protections Do not use the machine as a means of transport do not push tow it Do not allow the brush to operate while the machine is stationary to avoid damaging the floor In case of fire use a powder fire extinguisher not a water one Do not tamper with the machine safety guards and follow the ordinary maintenance instructions scrupulously Do not allow any object to enter into the openings Do not use the machine if the openings are clogged Always keep the openings free from dust hairs and any other foreign material which could reduce the air flow Do not remove or modify the plates affixed to the machine This machine cannot be used on roads or public streets Pay attention during machine transportation when temperature is below freezing point The water in the recovery tank or in the hoses could freeze and seriously damage the machine 7 Service Manual SC400 General Information 8 Use
20. supp NS JA 2 LDA Green anode LED power supply LED ELECTRONIC BOARD EBLED anode supply DETERGENT FLOW PUSH BUTTON SW3 ROTARY SWITCH SW1 Control System 18 FUNCTION ELECTRONIC BOARD EB1 R BRUSH RELEASE FUSE F4 SIGNAL CIRCUIT FUSE F3 24V 33 1 Control power supply 33 2 Brush function return 33 3 Vacuum system function return 33 4 Brush rotation enabling J3 5 Water push button return J3 7 Common cathode LED power supply J3 8 LDA G anode LED power supply J3 9 LDB Y anode LED power supply J3 10 LDB G anode LED power supply J3 11 LDC R anode LED power supply 33 12 LDC G anode LED power supply P200075 Service Manual SC400 Component Locations Handlebar with control panel Program selection knob rotary switch SW1 LED indicators for solution quantity battery charge Rotary switch SW1 Brush levers Control System 19 Machine start up enabling push button SW2 Solution flow push button SW3 Function electronic board EB1 LED electronic board EBLED Low consumption circuit fuse F3 Wiring harness Handlebar inclination adjusting lever Program selection knob rotary switch SW1 Or Solution flow 3 4 push button SW3 TER a A t Handlebar inclination ay adjusting lever Brush lever
21. D VALVE EV1 DETERGENT FLOW PUSH BUTTON SW3 SIGNAL CIRCUIT BRUSH ENABLING ROTARY SWITCH SWI FUSE F3 PUSH BUTTON SW2 L Ee 31 2 Solenoid valve power supply 31 3 Solenoid valve power supply 24V FUNCTION ELECTRONIC BOARD EB1 J3 1 Control power supply J3 2 Brush function return 33 4 Brush rotation enabling J3 5 Water push button return P200080 61 62 Solution System Service Manual SC400 Component Locations Solenoid valve EV1 Solution tank Solution drain and level check hose Solution opening closing valve Solution filter Solution drain and level check hose Solenoid valve EV1 Solution filter Solution tank Solution opening closing valve P200067 Service Manual SC400 Solution System 63 Maintenance and Adjustments Solution Filter Cleaning 1 2 3 Drive the machine on a level floor Turn the machine program selection knob to 0 Operating under the machine in front of the left rear wheel close the solution valve A The valve A is closed when it is in the position B and it is open when it is in the position C Remove the transparent cover D and the gasket E then remove the filter strainer F Clean and install them on the support G install the gasket E and the filter strainer F properly on the cover D and on the support
22. D power supply out OV lt 1A JA 1 8 LDA G anode LED power supply out 0 7V 1A JA 2 9 LDB Y anode LED power supply out 0 7V 1A JA 3 10 LDB G anode LED power supply out 0 7V 1A JA 4 11 LDC R anode LED power supply out 0 7V 1A JA 5 12 LDC G anode LED power supply out 0 7V 1A JA 6 27 Service Manual SC400 Function Electronic Board EB1 Connectors Continues J4 MOLEX MINIFIT type 2 ways vertical Control System O bal O Jo S 029200 ngas gLJoB o BE Bowe oo Ta oOo N To o a L3 O c3 T lee SE J4 O1 ojo Q Dip O CJ Ol ES a 0 6 OT 0000 O Description Electronic board Connected to in out 1 Battery charger enabling power supply out 24V 5A CH 1 2 Battery charger enabling return in 24V 5A CH 2 LED ELECTRONIC BOARD CONNECTOR EBLED B side JA MOLEX MINIFIT type 6 ways vertical 6 5 l4 Description Electronic board Connected to in out 1 Common cathode LED power supply in OV lt 1A J3 7 2
23. Ge word traia a a 18 Component Locations e 19 Removal and Installation 20 a o RR Ee ag cds ai RS ud 24 Controls and Functions s esc ka sia st anr ga ng ss 29 Electrical SysteM ia m m9 9 mmn 32 Functional Description 32 IEN 32 Wiring Diagram o e eae cea ea a le sS aos 32 Component Locations e 33 Maintenance and Adjustments 2 NG 34 Troubleshooting sco ai ua i eoe se RI ea he Rex fem Ee A EURO S Rude Re pue os 38 Machine Wiring Diagram 39 Specifications a a aa a a e E a aai e a e a 40 Recovery System m mh 41 Functional Description 41 Waring Didgram e a Wow odo sete gue a A A RA 41 Component Locations 2 a 42 Maintenance and Adjustments a a 43 Troubleshooting sss 44 Removal and Installation s c aci cR Rex OA ON RR 45 SpecificallOnSu e a8 ba ku ow sd Rok a ee a EOCROEUE wx W 3 Ek 63 X3 48 Service Manual SC400 Table of Contents 3 Scrub System DISC e e e a ka eer m m mnn 49 Functional Description 49 Warme Diagram o a sia qe ate d ree petras a OH Ba ae US TI Eo em efc a ee POR es 49 Component Locations e 50 Maintenance and Adjustments 2 lll lees 51 Troubleshooting eee S aon 53 Removal and Installation se we e e RR e Ro XR URONU QA BNE UC 54 SpecificallOnS 4 4 6 Gasca te Wes GRE ADR CAD hoe ee She OU AUGE AUR EUR ee 60 Solution System szu ea aa e E ER WU a ROO sio De e E E a
24. Manual SC400 Troubleshooting The vacuum system motor M2 does not turn on The vacuum system motor carbon brushes are worn Recovery System Replace The rotary switch SW1 is broken The vacuum system motor is faulty Replace Check the amperage Check the carbon brushes Replace The fuse F2 is open Replace The relay K2 is broken Replace The recovery water vacuuming is insufficient or there is no vacuuming The vacuum grid with automatic shut off float is activated because the recovery tank is full Drain the recovery tank The vacuum grid is dirty Clean The tank cover is not correctly positioned Adjust The tank cover gasket is not efficient Clean replace The vacuum system motor filter is dirty Clean The vacuum gaskets are damaged or do not match perfectly Repair or replace The squeegee vacuum hose is broken Replace The recovery tank vacuum hose is broken Replace 44 Service Manual SC400 Removal and Installation Vacuum System Motor Amperage Check Warning This procedure must be performed by qualified personnel only 1 Check that the squeegee and the vacuum hose are clean and that there is no dirt in their inner parts 2 Keep the squeegee lifted 3 Remove the screws A then remove the electrical component box cover B Warning Do not touch uncovered electrical components while performing t
25. SC400 Service Manual Advance SC400 9087310020 Nilfisk SC400 9087311020 Nilfisk SC400 9087318020 QNIlfisk Q Advance trusted since 1906 English 2012 11 Form No 9099624000 Service Manual SC400 Table of Contents 2 Table of Contents Table of Contents sa aws NR oo oo EN n Romx vw OX ww 2 General Information s eee ee pe he ee m s 4 Machine General Description 4 Service Manual Purpose and Field of Application 4 Other Reference Manuals 4 CONVENTIONS o 5a BS eu marte ba Ug d em dd dies dee m an s e mq eS 5 Service and Spare Parts oaoa 5 Serial Number Label vous edo a da ee wo v Y RUE E OR a Ew o poe E G 5 prn Pr cT 6 Symbolsz o dr na pd et uec bera deudor ides d eds Gh eie T a 6 General Instructions 6 Machine Litto sb bd et da amp es A A Quia dotted ngg a Spee ene ead 9 Machine Transportation Ry ox EN REN PRO UR P oROROS AE 3 44 e ov 9 Machine Nomenclature know your machine cr 10 Handlebar with Control Panel a 12 Service and Diagnostic Equipment oaoa a 13 Technical Data irr s ue ou que dcm E Pepe soda poe d dude p ded E s 14 Dimensions aera ps ageer reapero ka persia a A 15 Maimnteradee s ss saa Ai a x dee or ao cd Pe d moe dos edu E We Bose Ba A Rug LU 16 Scheduled Maintenance Table een 16 Control Systemi EENEG 17 Functional Description a ia EUR EUR RU ww ee iow la US 17 Wiring Diagram sa se ko ko 0x
26. UNCTION ELECTRONIC BOARD EB1 24V BATTERY BAT SIGNAL CIRCUIT FUSE F3 BRUSH RELEASE FUSE F4 N 4 J3 1 21 3 41 5 6 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9710 1112 r E GE Une SH 4 n DETERGENT SOLENOID VALVE EV1 Loc 7 BRUSH MOTOR FUSE F1 N BRUSH ELECTROMAGNETIC LED ELECTRONIC LU SWITCH K1 ROTARY SWITCH SW1 BRUSH ENABLING PUSH BUTTON SW2 VACUUM SYSTEM VACUUM SYSTEM VACUUM SYSTEM MOTOR FUSE F2 RELAY K2 BRUSH RELAY K2 DETERGENT FLOW PUSH BUTTON SW3 ELECTROMAGNETIC SWITCH K1 BOARD EBLED BATTERY CHARGER CH BATTERY CONNECTOR C1 BATTERY FUSE F0 P200077 Service Manual SC400 Specifications Electrical System 40 General Values Total absorbed power 29 A 0 75 kW Battery compartment size 13 7x17 7x10 2 in 350x350x260 mm Battery voltage 24V Standard batteries 2 12 V 50Ah C5 AGM Spiracell Battery charger 100 240 VAC Work autonomy standard batteries 1 5 hour Nilfisk S Advance Service Manual SC400 Recovery System 41 Recovery System Functional Description The water recovery system removes the dirty water When the automatic float closes and shuts down the from the floor and pipes it to a recovery tank When vacuum system the vacuum system motor noise will the machine is running the dirty water on the flooris increase and the floor will not be dried collected by the squeegee bla
27. V 2 6 Brush motor braking circuit SIGNAL CIRCUIT FUSE F3 24V FUNCTION ELECTRONIC BOARD EB1 113 1 Control power supply 33 2 Brush function return 334 Brush rotation enabling P200079 Service Manual SC400 Scrub System Disc 50 Component Locations Disc brush deck Brush release fuse F4 Brush motor M1 Machine forward speed adjusting handwheel Drive hub Machine straight forward movement adjusting Electromagnetic switch K1 handwheel Brush motor fuse F1 Brush release fuse F4 Drive hub ES es WI A Machine straight forward movement adjusting handwheel Machine forward speed adjusting handwheel P200058 Service Manual SC400 Scrub System Disc Maintenance and Adjustments Brush Cleaning Warning Itis advisable to wear protective gloves when cleaning the brush because there may AM be sharp debris 1 Remove the brush as shown in the User Manual 2 Insert the positioning pin A and disengage the machine parking device B 3 Clean the brush with water and detergent 4 Check the brush bristles for integrity and wear if necessary replace the brush 5 Install the brush as shown in the User Manual a aL DX TN P200059 51 Service Manual SC400 Scrub System Disc 52 Mac
28. Vacuum grid with automatic shut off float Squeegee vacuum hose IM i A WT Vacuum system Recovery tank mor ME ic EN lt a 5 9 mad P e LR P MEE ect ge e 3 A Vacuum system relay K2 Vacuum system motor fuse F2 Electrical component box Service Manual SC400 Recovery System 43 Maintenance and Adjustments Tank and Vacuum Grid Cleaning 1 Drive the machine to the appointed disposal area 2 Turn the machine program selection knob to 0 3 Open the recovery tank cover A then clean and wash the cover the tank B and the vacuum grid C with clean water If necessary release the fasteners D and open the grid C remove the float E clean all the components and then reinstall them If necessary clean also the solution tank Drain the water from the tanks with the relevant drain hoses 4 Check the recovery tank cover gasket F for integrity The gasket F must be efficient because it creates vacuum in the tank that is necessary for vacuuming the recovery water If necessary replace the gasket F by removing it from its housing G When assembling the new gasket install its junction H in the central rear area as shown in the figure 5 The gasket F must be in good shape as it is necessary for the recovery tank stay sealed 6 Close the recovery tank cover A P200054 Service
29. ansition threshold V tolerance 0 1 1 Green fix lt gt yellow fix 22 0 22 2 2 Yellow fix gt red flashing 1Hz 20 4 21 6 3 Safety threshold 19 4 20 6 The transition is filtered with a time constant of 3 sec as to the supply voltage reading When threshold 2 is reached the J2 3 BRUSH ELECTROMAGNETIC SWITCH and J1 2 3 SOLENOID VALVE outputs are automatically cut off after a 5 sec delay In chase threshold 3 is reached also J2 4 VACUUM SYSTEM output is automatically deactivated without delays and the BRUSH MOTOR BRAKING function see step k is disabled Irrespective of the voltage reading when transition 2 1s performed it is not possible to go back to YELLOW or GREEN condition The system reset happens when the machine is turned off by turning the rotary switch SWI to 0 h WATER FLOW SETTING function When the battery charge status is above threshold 1 the 3 LEDs show the charge status only during the first 5 sec after BRUSH or VACUUM SYSTEM function has been activated then they switch to the display of water flow setting see step f If during the first 5 sec the push button SW3 is pressed the display immediately switches to the water flow setting When the water flow setting is displayed each time the push button SW3 is pressed the setting of the water flow increases by 1 in sequence from 3 to 0 When the battery charge status 1s below threshold 1 the display shows the battery charge
30. base of the machine as shown in the figure Make sure that the machine cannot move independently Turn the machine program selection knob to 0 Remove the squeegee as shown in Squeegee Cleaning paragraph Lower the squeegee support system B by fully stretching the gas spring A Unscrew the nut C and remove the relevant screw Lower the gas spring A and the linkage D Unscrew and remove the screw with nut E Retrieve the gas spring F Assembly 8 Assemble the components in the reverse order of disassembly P200072 Service Manual SC400 Specifications Squeegee System General Values Machine width with squeegee 28 3 in 720 mm Gas spring pressure 40 5 Lb 180 Nm Nilfisk S Advance 71 Service Manual SC400 Wheel System Non Traction 72 Wheel System Non Traction Component Locations Central wheels on fixed axle Rear support wheel when the squeegee is lifted Parking wheel Parking wheel positioning pin IN Parking wheel positioning pin um Parking wheel Rear support wheel when the squeegee is lifted Central wheels on fixed axle ne AL SCH UN P200073 Service Manual SC400 Specifications Wheel System Non Traction General Values Minimum turning radius 29 5 in 750 mm Diameter of wheels on fixed axle 9 8 in 250 mm Whee
31. below DIP switch position WET ON GEL OFF CH OFF NO CH ON The battery charger is installed on the machine as a standard component the dip switch must be turned to OFF CH position P200046 Service Manual SC400 Control System 21 LED Electronic Board EBLED Disassembly Assembly Disassembly 1 Drive the machine on a level floor Make sure that the machine cannot move independently Turn the machine program selection knob to 0 Disconnect the battery connector red 2 3 4 Onthelower side of the handlebar with the control panel unscrew the screws A 5 Lower the upper side B of the handlebar with the control panel 6 Disconnect the connector C of the LED electronic board D Remove the screws E and remove the LED electronic board D 7 If necessary disconnect the connector F and remove the solution flow push button G by disengaging the inner tabs H P200047 Service Manual SC400 Control System 22 LED Electronic Board EBLED Disassembly Assembly Continues 8 Ifnecessary remove the selector assembly N of the machine program selection knob I as shown below Disconnect the connectors J On the outer side turn the knob 1 on the position K vacuum system activation Loosen the set screw inside the housing L then remove the knob I from the housing Remove the screws M and from the inside remove the selector assembly N of the
32. by two wing nuts in the squeegee support slots In case of fixed obstacles the quick fit system allows for squeegee to break away from the bracket in order to prevent dam age to the squeegee support The squeegee support 1s hinged to the machine which allows the squeegee to turn sideways The 2 blades have different hardness and work side Front blade to be used only on the ruled side for ward to convey the water towards the centre of the squeegee Rear blade to be used only on the smooth side for ward to dry and collect water Squeegee System 65 Each blade has 2 functional edges that can be used before it needs replacing The design and the central duct make it easy for the squeegee to clear the water The squeegee system can be lifted and lowered by the pedal To lift the squeegee it is also possible to tilt the ma chine backward until the squeegee is raised 66 Sgueegee System P200069 Component Locations Service Manual SC400 Y x NS A Blade mounting springs Squeegee mounting handwheels Squeegee lifting lowering pedal Squeegee blades Gas spring Squeegee mounting handwheels Squeegee lifting lowering pedal d ISS N 9 lt Ue we ER A 1 D Ben 7 2 o o o N Oo NU o m S ap o E Uu E e un S gg gt m i D So 2 23 3 DO OO O o ogg ap Ep Ep oo OO o D 0 0y 22g oO oO o gn un un D Ser
33. des and collected through When the recovery tank is full it can be emptied the slots in the same piped through the vacuum hose through the drain hose and into the tank by the airflow created by vacuum motor M2 The dirty water 1s piped into the recovery tank while the airflow continues to the vacuum fan The vacuum system motor M2 1s supplied by the relay K2 which is driven by the function electronic board EB1 when the rotary switch SWI is turned to 1 or 3 The circuit is protected by the fuse F2 The automatic float in the vacuum grid stops vacuum system motor M2 from collecting any liquids Wiring Diagram B B VACUUM SYSTEM E MOTOR FUSE F2 VACUUM VACUUM SYSTEM SYSTEMRELAY K2 MOTOR M2 J2 4 Vacuum system relay power supply 24V J2 5 Electromagnetic switch relay power supply FUNCTION ELECTRONIC BOARD EB1 ROTARY a SWITCH T E De SIGNAL CIRCUIT SW1 FUSE F3 24V 33 1 Control power supply 33 3 Vacuum system function return P200078 Service Manual SC400 Recovery System 42 Component Locations Recovery tank Vacuum system motor M2 Vacuum grid with automatic shut off float Electrical component box Recovery tank cover Vacuum system motor fuse F2 Cover gasket Vacuum system relay K2 Recovery water drain hose Squeegee vacuum hose gt Recovery tank cover Cover gasket Recovery water drain hose
34. e four electrical connections M of the brush motor N Mark the position of each of the four electrical connections M to make subsequent assembly easier Remove the nuts and disconnect the four electrical connections M from the motor Retrieve the brush deck J Assembly 18 Assemble the components in the reverse order of disassembly P200064 Service Manual SC400 Scrub System Disc Brush Motor Disassembly Assembly Disassembly 1 Remove the brush deck see the procedure in the Brush Deck Disassembly Assembly paragraph On the lower side of the deck remove the centre screw A Remove the flange B 2 3 4 Remove the spacer C and the key D from the hub E 5 Remove the screws F and remove the brush case G 6 Retrieve the brush motor H Assembly 7 Assemble the components in the reverse order of disassembly P200065 58 Service Manual SC400 Scrub System Disc Brush Deck Adjuster Disassembly Assembly Disassembly 1 Remove the brush deck see the procedure in the Brush Deck Disassembly Assembly paragraph 2 Onthe front right side of the machine remove the screw A and the handwheel B 3 Remove the nut C and form inside the wall remove the deck adjuster D Assembly 4 Assemble the components in the reverse order of disassembly P200066 59 Service Manual SC400 Specifications Scrub System Disc General Values Brush pad diam
35. e presence of the signal on J3 4 with a 1 sec delay to switching on The output on J1 2 3 SOLENOID VALVE is controlled by the WATER FLOW CONTROL function see step f The BRUSH function is subjected to the BATTERY PROTECTION function see step g and to the BRUSH MOTOR PROTECTION function see step j e VACUUM SYSTEM function is activated when J3 3 is at 24V with a 1 sec delay at switching on and a 1 sec delay at switching off The VACUUM SYSTEM function includes the activation of J2 4 VACUUM SYSTEM RELAY output The VACUUM SYSTEM function is subjected to the BATTERY PROTECTION function see step g f WATER FLOW CONTROL function J1 2 3 SOLENOID VALVE output when activated see step d is modulated by ON OFF cycles according to the following table the current status is shown by the LEDs see step h Solution flow push button LED display Solenoid valve ON time EV1 Solenoid valve OFF time EV1 setting SW3 0 OOO Always OFF 1 O O Q 1 sec 5 sec 2 O 3 sec 3 sec 3 000 Always ON The default setting for the solution flow push button SW3 is 1 The next detergent percentage setting is NOT stored into memory when the machine is turned off Service Manual SC400 Control System 30 Controls and Functions Continues g BATTERY PROTECTION function battery charge status is shown by the 3 LEDs depending on the type of battery WET GEL see step j according to the following diagram Tr
36. ectronic board The control circuits are protected by the fuse F3 on the function electronic board EB1 LEDs to display the battery charge level LEDs to set water flow level m 9 o AREA SIS The LED electronic board EBLED is driven by the function electronic board EB1 Diagram of Output Activation according to the Position of the Switches SW1 SW2 and SW3 Function electronic board EB1 LED electronic board Brush motor M1 Vacuum system motor solenoid valve EV1 WAR Program selection knob Irotary switch SW1 Machine start up enabling push button settings SW2 settings with brush levers EBLED O Pressed released Off Off Off mm TI A Released On Off On mm em KR Pressed On On On mm E Released On Off Off mm a Pressed On On Off TES Pressed released On Off On Solution flow push button setting SW3 LED display Symbols Solenoid valve ON time Solenoid valve OFF time 0 Always OFF 1 6 1 sec 5 sec 2 3 sec 3 sec 3 o O 0 oe Always ON Service Manual SC400 Wiring Diagram BRUSH ENABLING PUSH BUTTON SW2 LED power supply ei JA 5 LDC Red LED power gt JA 6 LDC Green anode LED power supply ANG JA 1 Common cathode anode supply Pt ki anode JA 3 LDB Yellow LED power JA 4 LDB Green LED power
37. efined by the person in charge of the maintenance For instructions on maintenance procedures see the following paragraphs Scheduled Maintenance Table Daily after using the Every six machine months Procedure Squeegee Cleaning Brush Cleaning Tank and Vacuum Grid Cleaning Squeegee Blade Check and Replacement Solution Filter Cleaning Battery Charging WET battery fluid level check Screw and nut tightening check Brush motor carbon brush check and replacement Vacuum system motor carbon brush check and replacement 1 And after the first 8 working hours Nilfisk Advance Service Manual SC400 Control System 17 Control System Functional Description The function control is performed with the program The LED electronic board EBLED has a set of 3 selection knob rotary switch SWI the machine two color LEDs The set of 3 LEDs is used to indicate start up enabling push button SW2 which can be either battery charge level or water flow level depend used simultaneously with the brush levers and the ing on the current mode of operation solution flow push button SW3 The switch outputs are read by the function electron 1c board EB1 which consequently controls the rel evant outputs electromagnetic switch K1 for brush motor relay K2 for vacuum system motor while the solenoid valve EVI is activated directly form the el
38. ervice technicians when carrying out mainte nance and repairs on the SC400 to guarantee the best cleaning performance and a long working life for the machine Please read this manual carefully before performing any maintenance and repair procedure on the machine Other Reference Manuals Product Code User Manual Spare Parts List Nilfisk SC400 9087311020 9099612000 9099613000 Nilfisk SC400 9087318020 Advance SC400 9087310020 9099626000 9099627000 These manuals are available at Local Nilfisk Advance Retailer Nilfisk Advance website www nilfisk com www advance us com 4 Service Manual SC400 General Information Conventions Forward backward front rear left or right are intended with reference to the operator s position that is to say in driving position with the hands on the handlebar Service and Spare Parts Service and repairs must be performed only by authorised personnel or Nilfisk Service Centers The authorised personnel is trained directly at the manufacturer s premises and has original spare parts and accessories Contact Nilfisk Retailer indicated below for service or to order spare parts and accessories specifying the ma chine model and serial number Apply Retailer label here Serial Number Label The machine model name and serial number are marked on the plate see the example to the side Product number and year of production are marked on the same plate This informat
39. eter 17 in 430 432 mm Brush pressure with full tank and lowered squeegee 77 lb 35 kg Brush motor power 0 6 hp 450 W Brush motor speed 155 rpm Brush motor amps 3 4A No load Nilfisk S Advance 60 Service Manual SC400 Solution System Functional Description The solution system supplies the detergent to the brush when cleaning the floor The solution tank is also the main machine body There is a manual valve on the left side of the tank to close the water supply whenever maintenance must be performed on the ma chine The detergent quantity is adjusted by the operator with the push button SW3 The solution flows from the tank to the tap through the filter and solenoid valve EV1 and then to the brush deck The solenoid valve EVI is supplied by the function electronic board EB1 when the rotary switch SWI Solution flow push button LED display setting SW3 Solution System is turned to 1 or 2 the brush activation push button SW2 is pressed and the push button SW3 setting is different from 0 8 LEDs off The circuit is protected by the fuse F3 on the func tion electronic board EB1 The solution valve 1s pulse width modulated to meter the flow rate Solenoid valve ON time EV1 Solenoid valve OFF time EV1 0 Always OFF 1 1 sec 5 sec 2 3 sec 3 sec 3 Oo O 0 Always ON Wiring Diagram DETERGENT SOLENOI
40. he following steps 4 Apply the Amp clamp C on the electrical cable D of the vacuum system motor on the relay output E 5 Turn on the vacuum system and check that the vacuum system motor amperage is between 13 and 17 A at 24V Stop the vacuum system Turn the machine program selection knob to 0 Recovery System 45 Remove the Amp clamp C If the amperage is higher perform the following procedures to detect and correct the abnormal input Check that the vacuum system motor fuse F2 is properly tightened Check the condition of the vacuum system motor carbon brushes Remove the vacuum system motor see the procedure in the Vacuum System Motor Disassembly Assembly paragraph and check the condition of all its components If the above mentioned procedures do not produce the correct readings for the vacuum system motor amperage the motor must be replaced see the procedure in the Vacuum System Motor Disassembly Assembly paragraph Reassembly 6 Assemble the components in the reverse order of disassembly P200055 Service Manual SC400 Recovery System Vacuum System Motor Carbon Brush Check Replacement Disassembly Check 6 Check the carbon brushes F for wear The carbon brushes are worn when l Remove the vacuum system motor see the The contact with the motor armature is insuf procedure in the Vacuum System
41. hich correspond to about 4045 Ampere in the motor If the protection activates automatic switching off of J2 3 and J1 2 3 outputs the GREEN YELLOW and RED LEDs continue to flash until their reset by switching off the machine BRUSH REMOVAL SYSTEM When the BRUSH function is active and the push button SW2 is NOT PRESSED for at least 3 sec if the push button SW2 is pressed and released 3 times in 2 sec the following cycle is performed 1 Alternating flashing of RED AND GREEN LEDs for 2 sec to confirm brush remove mode 2 Closing by a TIANBO HJR 3FF S Z relay contact of J2 6 output on J1 1 positive power supply through F4 fuse for 2 sec shunt B to both states of motor to cause abrupt stop 3 Activation after 0 2 sec of J2 3 BRUSH ELECTROMAGNETIC SWITCH output for 1 sec The BRUSH REMOVAL SYSTEM is subjected to the BATTERY PROTECTION function see step g During this cycle which lasts 4 sec the SW2 push button is disabled Nilfisk S Advance Service Manual SC400 Electrical System Functional Description Basically the electrical system consists of a function electronic board EB1 which determines the brush motor vacuum system motor and solenoid valve acti vation by means of the relevant controls rotary switch SWI and brush activation push button SW2 dis abling them when the battery voltage drops below the battery safety threshold value The batteries are connected to the system by means of
42. hine Forward Movement Adjustment cleaned and the choice of using the brush or the pad Kr Note The machine speed and forward movement vary according to the type of floor to be Sc 1 If necessary perform the following procedure Adjust the machine speed with the handwheel A according to the following procedure Turn it counter clockwise to increase the machine speed Turn it clockwise to decrease the machine speed If it is difficult to keep the machine moving straight forwardly because it deviates to the left or to the right adjust the knob B by turning it clockwise or counter clockwise With the machine ready to operate perform hands on tests of the machine speed if necessary perform step 2 again P200060 Service Manual SC400 Troubleshooting Open Circuit The fuse F1 determines an open in the supply circuit of the brush deck motor This system allows to prevent the circuits from being damaged under overload conditions The open in the fuse can be caused by the following Short circuit in the brush motor wiring harness fault in the motor Trouble The brush does not clean properly Possible Causes The brush is excessively worn Scrub System Disc Replace The brush does not turn Activation of motor overload Restart the machine as shown in the User Manual The motor carbon brushes are worn Replace The motor is faulty Check the motor amperage rep
43. his machine is not suitable for collecting dangerous powders For WET batteries only Keep the battery away from sparks flames and incandescent material During the normal operation explosive gases are released For WET batteries only Battery charging produces highly explosive hydrogen gas Keep the battery cover open during battery charging and perform this procedure in well ventilated areas and away from naked flames 6 Service Manual SC400 General Information serious injuries damages to materials or equipments Caution Make sure to follow the safety precautions to avoid situations that may lead to Carefully read all the instructions before performing any maintenance repair procedure Before using the battery charger ensure that frequency and voltage values indicated on the machine serial number plate match the mains voltage Do not pull or carry the machine by the battery charger cable and never use the battery charger cable as a handle Do not close a door on the battery charger cable or pull the battery charger cable around sharp edges or corners Do not run the machine on the battery charger cable To reduce the risk of fire electric shock or injury do not leave the machine unattended when it is plugged in Keep the battery charger cable away from heated surfaces Before performing any maintenance procedure disconnect the battery charger cable from the electrical mains to avoid any risk of fire electric shock
44. hown below Machine Setting 1 Disconnect the battery connector red 2 Remove the screws A then carefully remove the electrical component box cover B 3 On the electronic board turn the microswitch C to WET or GEL AGM according to the type of batteries to be installed Warning Do not movey set the adjacent switch D 4 Reinstall the electric component box cover B and tighten the screws A es NS zi Sh MEM ON mm P200051 Service Manual SC400 Electrical System 35 Battery Installation And Battery Type Setting WET or GEL AGM Continues Battery charger setting 5 To set the battery charger refer to the relevant Manual supplied with the machine Battery Installation 6 T 8 9 10 Ll 12 13 14 Disconnect the vacuum hose E from the squeegee F Disconnect the recovery water drain hose G from the bracket H Open the cover D Grasp the recovery tank J in the area K and slightly raise it Disconnect the vacuum hose L from the tank then remove the tank J with the hoses M and N Install the batteries on the machine according to the diagram P Perform steps 6 to 10 in the reverse order Connect the battery connector red Charge the batteries see the procedure in Battery Charging paragraph P200081 Service Manual SC400 Electrical System 36
45. ion is useful when requiring machine Spare parts Use the following table to write down the machine identification data Product ae Serial NG corsa A A S 5 Service Manual SC400 General Information Safety The following symbols indicate potentially dangerous situations Always read this information carefully and take all necessary precautions to safeguard people and property Symbols Danger ltindicates a dangerous situation with risk of death for the operator Warning It indicates a potential risk of injury for people or damage to objects Caution It indicates a caution related to important or useful functions Note It indicates a remark related to important or useful functions a General Instructions Specific warnings and cautions to inform about potential damages to people and machine are shown below gt Warning Make sure to follow the safety precautions to avoid situations that may lead to serious injuries Before performing any cleaning maintenance repair or replacement procedure turn the pro gram selection knob to 0 and disconnect the battery connector This machine must be used by properly trained operators only Do not wear jewels when working near electrical components Do not work under the lifted machine if it is not securely fixed Do not operate the machine near toxic dangerous flammable and or explosive powders liquids or vapors T
46. l pressure on the floor 290 psi 2 N mm Nilfisk S Advance 73
47. lace There are ropes or debris restraining the brush rotation The fuse F1 is open Remove and clean Replace The motor electromagnetic switch K1 is damaged The brush motor electromagnetic switch wiring harness is damaged Replace Repair The wiring harness between function electronic board EB1 and brush motor electromagnetic switch K1 is damaged The levers or the enabling push button are broken Repair Replace The brush release system does not work The fuse F4 is open Replace The electromagnetic switch K1 is broken Replace 53 Service Manual SC400 Removal and Installation Brush Motor Amperage Check 1 2 3 Warning This procedure must be performed by qualified personnel only Remove the brush Remove the screws A then remove the electrical component box cover B Warning Do not touch uncovered electrical components while performing the following steps Apply the Amp clamp C on the electrical cable D of the brush motor on the electromagnetic switch output E Turn on the brush as shown in the User Manual and check that the brush motor amperage is between 3 and 4 A at 24 V Stop the brush rotation Turn the machine program selection knob to 0 Remove the Amp clamp C If the amperage is higher perform the following procedures to detect and correct the abnormal
48. m water lift blocked 47 2 inH O 1 200 mmH O Nilfisk S Advance Service Manual SC400 Scrub System Disc Functional Description The disc brush system can be started by the operator The disc brush rotates counter clockwise The brush system when turning cleans washes the floor surface and assists machine forward movement The deck where brushes suitable for cleaning the particular type of floor are installed is the main part of 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 the handwheel on the deck adjusts the machine straight forward drive The brush working pressure is functional to the ma chine designed balance The 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 SWI is turned 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 described in the Function Electronic Board Specifications chap ter The system once activated uses the solution coming form the solution system to wash the floor In case of brush motor overload a safety system stops the brushes after about one minute of continuous Wiring Diagram BRUSH ELECTROMAGNETIC SWITCH K1 BRUSH MOTOR FUSE F1 BRUSH
49. only brushes supplied with the machine or those specified in the User Manual Using other brushes could reduce safety If parts must be replaced require ORIGINAL spare parts from an Authorised Dealer or Retailer Do not wash the machine with direct or pressurised water jets or with corrosive substances The machine must be disposed of properly because of the presence of toxic harmful materials batteries oils etc which are subject to standards that require disposal in special centres see the User Manual For WET batteries only When lead WET batteries are installed on the machine do not tilt the machine for more than 30 from the horizontal plane to prevent the highly corrosive acid from leaking out of the batteries If the machine must be tilted to perform any maintenance pro cedure remove the batteries Service Manual SC400 General Information Machine Lifting Warning Do not work under the lifted machine if it is not securely fixed Machine Transportation Warning Before transporting the machine make sure that All covers are closed The recovery tank and the detergent tank are empty The batteries are disconnected The machine is securely fastened to the means of transport Service Manual SC400 General Information 10 Machine Nomenclature know your machine Solution tank Recovery tank Solution flow opening closing valve Solution solenoid valve Recovery tank cover Can holder
50. or 9087311020 9087318020 models n Drive the machine on a level floor Make sure that the machine cannot move independently 2 Disconnect the battery connector red 3 Remove the recovery tank 4 On the battery cable G check replace the following fuse H FO 125 A battery fuse 5 Assemble the recovery tank 6 Connect the battery connector red P200052 Service Manual SC400 Troubleshooting The machine is not working The battery connector C1 is not connected or broken Electrical System Connect or replace it The batteries BAT are discharged or its connections are not efficient Charge the batteries or clean repair the connections The batteries BAT are broken Check the battery no load voltage The battery charger CH is broken Replace The fuses FO F3 are open Replace The wiring harness is cut or pressed or short circuited Repair The rotary switch SW1 of the program selection knob is not working Replace The function electronic board EB 1 is broken Replace The DIP switch 2 is turned to NO CH ON when the battery charger is installed Turn the DIP switch 2 to CH OFF 38 Manuale di Assistenza SC400 Machine Wiring Diagram Electrical System 39 VACUUMSYSTEM BRUSH MOTOR M2 MOTOR Ml BATTERY CONNECTOR C14 F
51. or injuries Do not smoke while charging the batteries Always protect the machine against the sun rain and bad weather both under operation and inactivity condition Store the machine indoors in a dry place Before using the machine close all doors and or covers This machine is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction concerning use of the machine by a person responsible for they safety Children should be supervised to ensure that they do not play with the machine Close attention is necessary when used near children Use only as shown in this Manual Use only Nilfisk s recommended accessories Check the machine carefully before each use always check that all the components have been as sembled before use If the machine is not perfectly assembled it can cause damages to people and properties Take all necessary precautions to prevent hair jewels and loose clothes from being caught by the machine moving parts Do not use the machine on slopes with a gradient exceeding the specifications Do not use the machine on incline Do not tilt the machine more than the angle indicated on the machine itself in order to prevent instability Do not use the machine in particularly dusty areas Use the machine only where a proper lighting is provided While using this machine take care
52. qi n 61 Funetional Description eR Ro key EURO EUR x Gwe woe x A A 61 Wiring Diagram oe lt 4 4 446544 464 Re eee HERE OR E ESSO FOX EO Y ROY SR SOUS S 61 Component Locations e 62 Maintenance and Adjustments 2l ll ees 63 Troubleshooting 3 de s e wa E S poU OX RE AN ee poU Ens d poi el dg ee 64 Specifications 5 6x ue Gee kde eos tg dbaedadadeas dee a ar Ea 64 Squeegee System eee fms 65 Functional Description 65 Component Locations 4 is ai 4 a t3 UO 8 3 ba 3 e 33 w 33 e SEG 66 Maintenance and Adjustments lt ss secs ece Cek owa kE Ea pea EESE 67 Troubleshooting 42 499 FOO eR ERR ria E a HOES 69 Removal and Installation llle s 70 SPECITCAIONS a dp rad mud dese wat eee e A AA ee Heed Na A 71 Wheel System Non Traction 72 Component Locations 2 2 24242525 4 es 72 Specifications e 73 Service Manual SC400 General Information General Information Machine General Description The SC400 is a man down industrial machine designed to wash and dry floors in civil or industrial envi ronments in one pass The machine is powered by on board batteries The machine is equipped with a single disc brush a controlled solution flow dosing system and a rear squeegee with blades which dries the floor by vacuuming the dirty water Service Manual Purpose and Field of Application The Service Manual is a technical resource intended to help s
53. s less than 0 12 in 3 mm The spring is broken In this cases replace all motor carbon brushes Assembly 9 Assemble the components in the reverse order of disassembly P200062 Service Manual SC400 Scrub System Disc 56 Brush Deck Disassembly Assembly E Note The figure shows the 520 Watt motor the 450 Watt motor is similar us Ga Disassembly 1 Remove the recovery tank and the solution tank as shown in User Manual 2 Remove the brush as shown in the User Manual ko If possible place the machine on a hoisting system Make sure that the machine cannot move independently Turn the machine program selection knob to 0 Disconnect the battery connector red On the machine front left side remove the screw inside the hole A With the wheel B fully unscrew the threaded pin C from the upper nut screw Turn the handwheel D clockwise until the end of the stroke brush lowering o o IP D ZS Unscrew the nut E and remove the screw F thus letting the brush deck G lowering down 10 Lift the machine front side P and keep it lifted 11 Loosen the clamp H and disconnect the hose I A P200063 Service Manual SC400 Scrub System Disc 57 Brush Deck Disassembly Assembly Continues 13 14 15 16 17 Remove the brush deck J by turning it as shown in the figure then lay it on a flat surface Cut the clamp K Remove the four protecting caps L of th
54. sh motor speed 155 rpm Total absorbed power 29 A 0 75 kW Battery compartment size 13 7x17 7x10 2 in 350x350x260 mm Battery voltage 24V Standard batteries 2 12V 50 Ah C5 AGM Spiracell Battery charger 100 240 VAC Work autonomy standard batteries 1 5 hour Weight without batteries and with empty tanks 130 Ib 59 kg Gross vehicle weight GVW 300 Ib 136 kg Shipping weight 179 Ib 81 kg 267 Ib 121 kg 179 Ib 81 kg Service Manual SC400 General Information 15 Dimensions 1 oO mM lt i oo e 3 LaN E 1 db a I N Y 1230 mm 48 4 in a 720 mm 28 3 in a P200074 Service Manual SC400 General Information 16 Maintenance The lifespan of the machine and its maximum operating safety are ensured by correct and regular mainte nance Warning Read carefully the instructions in the Safety chapter before performing any maintenance procedure The following table provides the scheduled maintenance The intervals shown may vary according to particu lar working conditions which are to be d
55. status The LEDs switches from battery charge status to water flow setting display only when the push button SW3 is pressed This display last 5 sec before switching again If during the 5 sec the push button SW3 is pressed the setting of the water flow increases by 1 in sequence from x 3 to x 0 If the push button SW3 is not pressed for more than 5 sec the display switches again to the battery charge status i Battery type selection WET GEL each time the electronic board is switched on the current condition is shown for 2 sec by LEDs according to the following diagram RED LED flashing GREEN LED flashing After the first 2 sec the LEDs show the battery charge status or the water flow level see step h WET GEL setting depends from dip switch DIP1 position according to the silk screen printed WET and GEL marks beside the dip switch Service Manual SC400 Control System 31 Controls and Functions Continues j BRUSH MOTOR PROTECTION function through the differential input J2 1 J2 2 the voltage drop is read on the BRUSH MOTOR fuse if the voltage drop exceeds the alarm threshold for more than 30 sec the J2 3 BRUSH ELECTROMAGNETIC SWITCH and J1 2 3 SOLENOID VALVE outputs are switched off until their reset by switching off the electronic board When the threshold is exceeded without delays the GREEN YELLOW and RED LEDs flash simultaneously freq 1Hz The alarm threshold is 40 2mV w
56. vice Manual SC400 Maintenance and Adjustments Squeegee Cleaning Warning Itis advisable to wear protective gloves when cleaning the squeegee because there may be sharp debris 1 Drive the machine on a level floor Make sure that the machine cannot move independently 2 Turn the machine program selection knob to 0 3 Lower the squeegee with the pedal 4 Disconnect the vacuum hose A from the squeegee B Squeegee System 67 Loosen the handwheels C and remove the squeegee B Wash and clean the squeegee B In particular clean the compartments D and the vacuum hole E from dirt and debris Check the front blade F and the rear blade G for integrity cuts and tears if necessary replace them see the procedure in the following paragraph Assemble the components in the reverse order of disassembly TTE I d S gt S y finus Jm JT GC P200070 Service Manual SC400 Squeegee System 68 Squeegee Blade Check and Replacement 1 2 Disassemble and clean the sgueegee see the procedure in the relevant paragraph Check that the edge A of the front blade and the edge B of the rear blade lay down on the same level along their length otherwise adjust their height according to the following procedure Remove the mounting springs C then adjust the front neutral color brown color blade D
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