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Electrical System

24

Service Manual – SC351

Maintenance and Adjustments

Battery Installation

1 Open the cover and check that the battery connector is disconnected

2 Install the battery on the machine, connect the terminals and fasten it with the relevant belt

Warning!

This machine requires sealed lead batteries (GEL or AGM technology). Do not use
batteries with liquid electrolyte or not sealed (WET) for any reason.

Warning!

Pay special attention when connecting the battery pins. The red cable must be
connected to the positive pin (+), the black cable must be connected to the negative
pin (-) of the battery. A wrong connection can damage the battery charger.

Warning! The installed battery (GEL/AGM) may require a specific charging algorithm: See the

Battery Charger Setting and Dipswitch Configuration paragraph to set the proper

charging algorithm for the installed battery.

3 Connect the battery connector and close the cover

4 Charge the battery

Battery charging

Note:

Charge the batteries when the yellow or red LED turns on, or at the end of each working

cycle. Keeping the batteries charged make their life last longer.

Caution!

When the battery is discharged, charge is as soon as possible, as that condition
makes its life shorter. Check for battery charge at least once a week.

1

Drive the machine on a level floor.

2 Check that the function selection knob is turned to “0”

3 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)

Note:

When the battery charger is connected to the electrical mains, all machine functions

are automatically cut off. The red or yellow warning light (37) is on when the battery

charger is charging the batteries.

4 When the green warning LED stays on, the battery charging cycle is over

5 When the battery charging is completed, disconnect the battery charger cable from the electrical mains

and wind it round its housing

6 Now the machine is ready to be used

Note:

For further information about the operation of the battery charger, see the relevant

Manual attached.

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Содержание SC351

Страница 1: ...SC351 2013 05 Form No 9099876000 Service Manual Advance SC351 9087342020 Nilfisk SC351 9087340020 9087341020 English ...

Страница 2: ...ce and Diagnostic Equipment 11 Technical Data 12 Dimensions 13 Maintenance 14 Scheduled Maintenance Table 14 Chassis System 15 Frame main parts 15 Control System 16 Functional Description 16 Component Locations 17 Removal and Installation 18 Specifications 21 Electrical System 22 Functional Description 22 Fuses 22 Wiring Diagram 22 Component Locations 23 Maintenance and Adjustments 24 Troubleshoot...

Страница 3: ...moval and Installation 45 Specifications 48 Solution System 49 Functional Description 49 Wiring Diagram 49 Component Locations 50 Troubleshooting 52 Removal and Installation 53 Specifications 54 Squeegee System 55 Functional Description 55 Component Locations 56 Maintenance and Adjustments 57 Troubleshooting 59 Wheel System Non Traction 60 Component Locations 60 Specifications 61 ...

Страница 4: ...he Service Manual is a technical resource intended to help service technicians when carrying out mainte nance and repairs on the SC351 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 Model Product Code User Manual Spare Parts List Advanc...

Страница 5: ...he machine model and serial number Apply Retailer label here Serial Number Label The machine serial number and model name are marked on the plate see the example to the side Product code and year of production are marked on the same plate This information is useful when requiring machine spare parts Use the following table to write down the machine identification data Battery 12 Vdc 42 A Charg 100...

Страница 6: ...ions Specific warnings and cautions to inform about potential damages to people and machine are shown below 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 func tion selection knob to 0 and disconnect the battery connector This machine must be used by properl...

Страница 7: ...g the machine close all doors and or covers as shown in the User Manual 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 their safety Children should be supervised to ensure that t...

Страница 8: ...sly damage the machine Use brushes and pads supplied with the machine or those specified in the User Manual Using other brushes or pads could reduce safety In case of machine malfunctions ensure that these are not due to lack of maintenance If neces sary request assistance from the authorised personnel or from an authorised Service Center If parts must be replaced require ORIGINAL spare parts from...

Страница 9: ...ank Brush deck gearmotor Brush deck wheels Squeegee vacuum hose Transparent cover with vacuum grid Vacuum grid with automatic shut off float Recovery tank Brush pad holder deck Deck bumper wheels Squeegee Squeegee blades assembly GEL AGM battery Battery charger Accessory and battery compartment cover open Cover latch Serial number plate technical data conformity certification Fuses Battery charger...

Страница 10: ...ion flow activation Machine switching off 0 Handlebar inclination adjusting lever Brush levers Solution flow switch Machine start up enabling push button Program selection knob rotary switch Scrubbing program brush solution flow activation Drying program brush vacuum system activation Brush levers Battery charge LED indicators P100773 ...

Страница 11: ...and if possible Internet connection Digital Volt Meter DVM Amp clamp with possibility of making DC measurements Hydrometer Battery charge tester to check 12 V batteries Static control wrist strap Dynamometric wrench set A copy 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 foll...

Страница 12: ...ISO 4871 EN 60335 2 72 LwA 84 dB A Vibration level at the operator s arms ISO 5349 1 EN 60335 2 72 98 4 in s2 2 5 m s2 Maximum gradient when working 2 IP protection class X4 Protection class electric III Vacuum system motor power 0 27 hp 200 W Vacuuming with closed inlet 27 7 in H2 O 710 mmH2 O Brush motor power 0 35 hp 260 W Brush motor speed 140 rpm Total absorbed power 42 A 0 5 kW Battery compa...

Страница 13: ...General Information 13 Service Manual SC351 Dimensions 28 5 in 726 mm 18 7 in 475 mm 17 in 432 mm 17 in 432 mm P100774 ...

Страница 14: ...nance The intervals shown may vary according to particu lar working conditions which are to be defined by the person in charge of the maintenance For instructions on maintenance procedures see the following paragraphs Scheduled Maintenance Table Procedure Daily after using the machine Weekly Every six months Yearly Battery charging Squeegee Cleaning Brush Cleaning Tank and Vacuum Grid Cleaning Squ...

Страница 15: ...Chassis System 15 Service Manual SC351 Chassis System Frame main parts 1 Frame 2 Handlebar holder 3 Wheels on fixed axle 1 2 3 P100775 ...

Страница 16: ...nt and the battery charger is not connected to the electrical mains The LED electronic board EB1 is equipped with 3 LEDs which indicate the battery charge level both during operation and while recharging Battery charge level LED display Diagram of Output Activation according to the Position of the Switches SW1 SW2 and SW3 Program selection knob rotary switch SW1 settings Machine start up enabling ...

Страница 17: ... Machine start up enabling push button SW2 Solution flow switch SW3 Wiring harness Handlebar inclination adjusting lever Handlebar with control panel Solution flow switch SW3 Machine start up enabling push button SW2 Program selection knob rotary switch SW1 Wiring harness LED electronic board EB1 Handlebar inclination and height adjusting lever Brush levers P100777 ...

Страница 18: ...b to 0 3 Disconnect the battery connector 4 On the lower 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 disenga...

Страница 19: ...s shown below Disconnect the connectors J On the outer side turn the knob I on the position K vacuum system activation Loosen the threaded dowel 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 knob I Assembly 9 Assemble the components in the reverse order of disassembly I M L K J N J P100779 ...

Страница 20: ...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 I of the switch G 10 If necessary remove the brush ...

Страница 21: ...ector EB1 JA 4 way vertical Tyco Modu II type 2 3 4 1 PIN Description Electronic board in out V ref I max 1 Common cathode LED power supply in 0 V 1 A 2 RED anode LED power supply in 0 7 V 1 A 3 YELLOW anode LED power supply in 0 7 V 1 A 4 GREEN anode LED power supply in 0 7 V 1 A ...

Страница 22: ...n the solution flow switch SW3 is turned to 1 maximum flow The battery charger CH supplies negative power to all the control relays only when the battery charge is suf ficient and the battery charger is not connected to the electrical mains The machine system is connected to the battery with the connector C1 Fuses The brush motor M1 is protected by the brush motor fuse F1 The vacuum system motor M...

Страница 23: ...system motor fuse F2 Function selector fuse F3 Brush motor relay K1 Solenoid valve timer relay KT1 Vacuum system motor relay K2 12V Battery BAT Battery charger CH Function selector fuse F3 Vacuum system motor fuse F2 Brush motor fuse F1 Brush motor relay K1 Vacuum system motor relay K2 Solenoid valve timer relay KT1 Battery wiring harness Connector C1 Machine wiring harness P100782 ...

Страница 24: ... Charge the batteries when the yellow or red LED turns on or at the end of each working cycle Keeping the batteries charged make their life last longer Caution When the battery is discharged charge is as soon as possible as that condition makes its life shorter Check for battery charge at least once a week 1 Drive the machine on a level floor 2 Check that the function selection knob is turned to 0...

Страница 25: ...P1 DP2 RED YELLOW GREEN LED LED LED P100783 SW1 LED CODES CHARGING CURVES DP1 DP2 BATTERY CHARGING LEDS on the control panel ON ON 2 flashes of the GREEN LED Charging algorithm for generic Gel and AGM battery ON OFF 2 flashes of the RED and GREEN LEDS Charging algorithm for AGM DISCOVER battery default for Advance model OFF ON 2 flashes of the YELLOW and GREEN LEDS Charging algorithm for OPTIMA ba...

Страница 26: ... turned to 0 and disconnect the battery connector 3 Open the cover and check one of the following fuses for deactivation or integrity A brush motor fuse circuit breaker F1 35 A B vacuum system motor blade fuse F2 30 A C function selector blade fuse F3 5 A 4 Reset or replace any fuse after having checked and repaired any problem that caused deactivation 5 Close the cover C B A P100784 ...

Страница 27: ...ions are not efficient Charge the batteries or clean repair the connections The 12V batteries BAT are broken Check the battery no load voltage The battery charger CH is broken Replace The function selector fuse F3 is open Replace The wiring harness is cut or pressed or short circuited Repair The program selection knob rotary switch SW1 is not working Replace The battery has been connected with inv...

Страница 28: ...SE F2 FUNCTION SELECTOR FUSE F3 BRUSH MOTOR RELAY K1 BRUSH MOTOR RELAY K1 VACUUM SYSTEM MOTOR RELAY K2 VACUUM SYSTEM MOTOR RELAY K2 SOLENOID VALVE TIMER RELAY KT1 BRUSH MOTOR M1 VACUUM SYSTEM MOTOR M2 PROGRAM SELECTION KNOB ROTARY SWITCH SW1 MACHINE START UP ENABLING PUSH BUTTON SW2 SOLUTION FLOW SWITCH SW3 LED ELECTRONIC BOARD EB1 R Y G 12 V BATTERY BAT CONNECTOR C1 P100785 ...

Страница 29: ...ilfisk SC351 Nilfisk SC351 full PKG Total absorbed power 42 A 0 5 kW Battery compartment size 17 8x6 9x9 4 in 350x175x240 mm Battery voltage 12 V Standard batteries 12 V 85 AhC5 AGM 12 V 55 AhC20 AGM spiralcell Battery charger 100 240 VAC Work autonomy standard batteries 2 hour 1 hour ...

Страница 30: ... motor M2 is supplied by the vacuum system motor relay K2 which is driven by the program selection knob rotary switch SW1 when it is turned to 1 or 3 The circuit is protected by the vacuum system motor fuse F2 The automatic float in the vacuum grid stops vacuum system motor M2 from collecting any liquids When the automatic float closes and shuts down the vacuum system the vacuum system motor noise...

Страница 31: ...anual SC351 Component Locations Recovery tank Vacuum system tank connection gasket Squeegee vacuum hose Vacuum system motor M2 Recovery tank Squeegee vacuum hose Vacuum system tank connection gasket Vacuum system motor M2 P100787 ...

Страница 32: ...ntinues Transparent cover Vacuum grid with automatic shut off float Cover gasket Vacuum system motor fuse F2 Vacuum system relay K2 Cover gasket Transparent cover Vacuum grid with automatic shut off float Vacuum system motor fuse F2 Vacuum system relay K2 P100788 ...

Страница 33: ...id B and remove the float E than clean with care and reinstall 6 Check the recovery tank cover gasket F for integrity Note The gasket F creates vacuum in the tank that is necessary for vacuuming the recovery water 7 If necessary replace the gasket F by removing it from its housing G on the cover When assembling the new gasket install the joint H in the area shown in the figure 8 Check that the sea...

Страница 34: ... floor 2 Check that the function selection knob is turned to 0 and disconnect the battery connector 3 Open the cover A and check the vacuum system motor gasket L for integrity 4 If necessary replace the gasket by removing it from its housing 5 Remove the recovery tank C 6 Check the recovery water duct gasket M for integrity If necessary replace the gasket 7 Clean with care and reinstall A L M C P1...

Страница 35: ...ean The transparent cover is not properly positioned Adjust The tank cover gasket is not sealing 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 or the vacuum hose is clogged or damaged Clean repair replace Warning This procedure must be performed by qualified personnel only Measure the vacuum sucti...

Страница 36: ...e motor amperage is between 15 and 18 A at 12 V 5 Turn the knob to 0 6 Remove the amp clamp B 7 If the amperage is higher than specified disassemble the vacuum system motor see the procedure in the relevant paragraph and check the condition of its moving parts 8 If the procedure does not lead to a correct amperage it is necessary to replace the motor 9 Reinstall the solution and recovery water tan...

Страница 37: ...ecover the washers and nuts 6 Remove the motor cover E and recover the gasket F 7 Remove the motor B and the acoustic insulation pipe G 8 Check the gasket F and the gasket H for damage If necessary replace Assembly 9 Assemble the components in the reverse order of disassembly and note the following When installing the gasket I into the hous ing J turn it until the lower tooth K and upper teeth L a...

Страница 38: ...e Manual SC351 Specifications Description Advance SC351 Nilfisk SC351 Nilfisk SC351 full PKG Recovery tank capacity 2 9 USgal 11 litres Vacuum system motor power 0 27 hp 200 W Vacuuming with closed inlet 27 7 in H2 O 710 mmH2 O ...

Страница 39: ...circuit is protected by the brush motor fuse F1 The system once activated uses the solution coming form the solution system to wash the floor To work properly the brush motor needs the following Program selection knob rotary switch SW1 turned to 1 2 or 3 Machine start up enabling push button SW2 pressed Charged batteries the red LED must not be flashing Battery charger is completing path to batter...

Страница 40: ...ine forward speed adjusting handwheel Machine straight forward movement adjusting handwheel Deck rotation end of stroke system Machine straight forward movement adjusting handwheel Brush motor M1 Machine forward speed adjusting handwheel Brush deck Drive hub Deck rotation end of stroke system P100794 ...

Страница 41: ...Scub Sytem Disc 41 Service Manual SC351 Component Locations Continues Brush motor fuse F1 Brush motor relay K1 Brush motor fuse F1 Brush motor relay K1 P100781 ...

Страница 42: ...oice of using the brush or the pad If necessary perform the adjustments as shown 1 Remove the recovery and the detergent tanks 2 Adjust the machine speed with the handwheel A Turn the handwheel counter clockwise to increase the machine speed Turn the handwheel clockwise to decrease the machine speed 3 If it is difficult to keep the machine moving in a straight line because it deviates to the left ...

Страница 43: ... Trouble Possible Causes Remedy The brush does not clean properly The brush is excessively worn Replace The brush does not turn The motor is faulty Check the motor amperage replace There are ropes or debris restraining the brush rotation Remove and clean The Brush motor fuse F1 is open Replace The brush motor relay K1 is damaged Replace The program selection knob rotary switch SW1 is broken Replac...

Страница 44: ...n on the brush by pressing the push button 39 together with the levers 40 then check that the motor amperage C is 6 to 8 A at 12 V 7 Turn off the brush by releasing the levers 40 8 Turn the knob 32 to 0 9 Remove the amp clamp A 10 If the amperage is higher perform the following procedures to detect and correct the abnormal amperage Check if there is dust or dirt ropes cables etc on the brush hubs ...

Страница 45: ... key C 6 Remove the 4 screws D the deck flange E and disassemble the brush deck F 7 Check the rubber pads G for integrity and replace them if excessively worn Note The rubber pads G allow the deck mechanical rotation by creating friction on the rotating brush 8 Check the end of stroke spacer tab H and replace it if necessary 9 Check the centre flange I and the relevant springs for integrity if nec...

Страница 46: ...igure Assembly 12 Assemble the components in the reverse order of disassembly and note the following Couple the tooth M of the end of stroke spacer tab N and the deck flange as shown in the figure Assemble the brush deck by matching the deck flange polarization O with the one of the deck holder P Note For further information on deck components see the Spare Parts List K P100801 L P100802 M N P1007...

Страница 47: ...ry connector is disconnected 3 Disconnect the gearmotor connector A and the detergent hose B 4 Lift the machine and remove the brush 5 Disassemble the brush deck as shown by the previous procedure 6 Recover the key C 7 Remove the 4 screws D 8 Remove the gearmotor E Assembly 9 Assemble the components in the reverse order of disassembly Note For further information on deck components see the Spare P...

Страница 48: ...ons Description Advance SC351 Nilfisk SC351 Nilfisk SC351 full PKG Brush pad diameter 14 5 in 370 mm Brush pad pressure on the floor 39 6 lb 18 Kg Brush pad pressure with full tank 59 5 lb 27 Kg Brush motor power 0 32 hp 240 W Brush motor speed 140 rpm ...

Страница 49: ...en it is turned to 1 or 2 and the machine start up enabling push button SW2 When the solution flow switch SW3 is open the solenoid valve EV is driven by solenoid valve timer KT1 2 sec ON 2 sec OFF When the solution flow switch SW3 is closed the solenoid valve EV is always on by pass the solenoid valve timer The circuit is protected by the function selector fuse F3 on the LED electronic board EB1 T...

Страница 50: ... System 50 Service Manual SC351 Component Locations Solution tank Filler plug Detergent valve Solenoid valve EV Detergent hose Filler plug Solution tank Detergent hose Detergent valve Solenoid valve EV P100807 ...

Страница 51: ...Solution System 51 Service Manual SC351 Component Locations Continues Solenoid valve timer relay KT1 Solenoid valve timer relay KT1 P200067 ...

Страница 52: ... solenoid valve or repair the electrical connection There is dust debris in the tank or in the detergent hoses obstructing the solution flow Clean the tank hoses The function selector fuse F3 is open Replace The solenoid valve relay KT1 is broken Replace The program selection knob rotary switch SW1 is broken Replace The levers or the machine start up enabling push button SW2 are broken Replace The...

Страница 53: ...ve the cover and the solution and recovery water tanks 4 Remove the solenoid valve power supply connector A 5 Disconnect the hoses B and C under the machine 6 Remove the screws D and recover the washers 7 Remove the solenoid valve E upwards Assembly 8 Assemble the components in the reverse order of disassembly and note the following When assembling the solenoid valve E the stamped arrow F must be ...

Страница 54: ...pecifications Description Advance SC351 Nilfisk SC351 Nilfisk SC351 full PKG Solution tank capacity 2 9 USgal 11 litres Min max solution flow One drop 0 066 gpm 0 25 litres min Two drops 0 13 gpm 0 5 litres min Resistance solenoid valve 16 Ohm ...

Страница 55: ...e conformation of the squeegee and the brush deck rotation mechanism assist in the alignment and accurate vacuuming of the water from the floor The 2 blades have different hardness Front blade with ruled side to convey the water towards the centre of the squeegee Rear blade smooth to collect the water and dry the floor All 4 functional edges of each blade can be used before replacing the blade its...

Страница 56: ...Squeegee System 56 Service Manual SC351 Component Locations Squeegee Rear blade Rear elastic strap Front blade Front strap Squeegee Rear elastic strap Rear blade Front blade Front strap P100809 ...

Страница 57: ...t the function selection knob is turned to 0 and disconnect the battery connector 3 Fully turn the brush pad holder deck counter clockwise 4 Disconnect the vacuum hose A from the squeegee 5 Disengage the squeegee B from the deck 6 Wash and clean the squeegee In particular clean the compartments C and the vacuum hole D 7 Check the front blade F and the rear blade G for integrity cuts and tears if n...

Страница 58: ...dge with an integral one If the other edges are worn too replace the blade as shown Remove the fastening strap H by disengag ing it from the fasteners I Replace or overturn the rear blade F then reinstall the fastening strap Remove the fastening strap J by disengag ing it from the fasteners K Replace or overturn the front blade E then reinstall the fastening strap 3 Install the squeegee B by caref...

Страница 59: ...Squeegee System 59 Service Manual SC351 Troubleshooting Trouble Possible Causes Remedy Leaving streaks on floor There is debris under the blade Remove The squeegee blade edges are torn or worn Replace ...

Страница 60: ... 60 Service Manual SC351 Wheel System Non Traction Component Locations Rear wheels on fixed axle Castors on brush deck Rear wheels on brush deck Castors on brush deck Rear wheels on brush deck Rear wheels on fixed axle P100812 ...

Страница 61: ...em Non Traction 61 Service Manual SC351 Specifications Description Advance SC351 Nilfisk SC351 Nilfisk SC351 full PKG Diameter of wheels on fixed axle 8 4 in 214 mm Wheel pressure on the floor 72 5 psi 0 5 N mm2 ...

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