Related Manuals for Nilfisk-Advance SC370
Summary of Contents for Nilfisk-Advance SC370
- Page 1 SC370 Service Manual SC370 43B/17B 50000627 50000638 English 04/2023 (Rev.01) Form No. 55942489...
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Page 2: Table Of Contents
Service Manual-SC370 Contents i Table of Contents Table of Contents..............................i 03 General Information ............................4 Machine General Description ........................... 4 Service Manual Purpose and Field of Application ..................... 4 Other Reference Manuals ..........................4 Conventions ..............................4 Service and Spare Parts ............................ 5 Serial Number Label ............................ - Page 3 Service Manual-SC370 Contents ii Removal and Installation ..........................27 Specifications ..............................29 Electrical Wiring Diagram ..........................30 30 Solution System ............................31 Functional Description ........................... 31 Component Locations ............................ 32 Maintenance and Adjustment ........................33 Troubleshooting............................. 33 Removal and Installation ..........................34 Specifications ..............................
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Page 4: General Information
Service Manual Purpose and Field of Application This Service Manual is a technical resource intended to aid service personnel in maintaining and repairing the SC370 43B/17B to ensure optimum performance and long service life. Please read this manual carefully before performing any maintenance and repair procedure on the machine. -
Page 5: Service And Spare Parts
Service Manual- SC370 03 General Information 5 Service and Spare Parts Service and repairs must be performed only by authorized personnel or Advance/Nilfisk Service Centers. The authorized personnel must be trained directly by the manufacturer and use original spare parts and accessories. Customers can order spare parts according to the Model No. -
Page 6: Safety
Service Manual- SC370 03 General Information 6 Safety Symbols It is important for you to read and understand this manual. The information it contains relates to protecting your safety and preventing problems. The symbols below are used to help you recognize this information. -
Page 7: Machine Lifting
Service Manual- SC370 03 General Information 7 Property Damage Messages – Storage and operation temperature must be above 0°C and humidity must be between 30% and 95%, non-condensing. – Before use, all doors and hoods should be properly latched. – This machine is not approved for use on public paths or roads. -
Page 8: Technical Data
Service Manual- SC370 03 General Information 8 Technical Data Model Description Units SC370 43B / SC370 17B Rated power 905 W Solution tank capacity L/Gal 25 L / 6.6 Gal. Recovery tank capacity L/Gal 25 L / 6.6 Gal. Machine length mm/Inches 1020 mm / 40.1 Inches... -
Page 9: Maintenance Schedule
Service Manual- SC370 03 General Information 9 Maintenance Schedule Warning! Maintenance procedures must be performed after the machine is turned off and the battery charger cable is disconnected. In addition, read carefully the instructions in the Safety chapter before performing any maintenance procedure. -
Page 10: Machine Structure
Service Manual- SC370 03 General Information 10 Machine Structure Handlebar 21. Control panel 2. Safety switch lever 22. Accessory parts box (*) 3. Handlebar adjusting lever 23. Battery charge cable holder 4. Recovery water drain hose 24. Battery charge cable 5. -
Page 11: Machine Structure (Continues)
Service Manual- SC370 03 General Information 11 Machine Structure (continues) Control Panel 31. Discharged battery warning light (red) 41. Serial number plate/technical data 32. Semi-discharged battery warning light (yellow) 42. Charging red LED 33. Charged battery warning light (green) 43. Charging yellow LED 34. -
Page 12: Service And Diagnostic Equipment
Service Manual- SC370 03 General Information 12 Service and Diagnostic Equipment Besides a complete set of standard tools, the following instruments are necessary to perform quick check and repairs on machines: • Digital Voltmeter (DVM) • Amp clamp with possibility of making DC measurements •... -
Page 13: Control System
Service Manual- SC370 04 Control system 13 04 Control System Functional Description The machine utilizes a Dashboard (EB1) to turn on various machine functions and a Control board (EB2) to control outputs. When Dashboard (EB1) receives inputs from operator, it activates various components and functions accordingly. - Page 14 Service Manual- SC370 04 Control system 14 Dashboard (EB1) back side Dashboard (EB1) front side Main relay Control board (EB2) back side Control board (EB2) front side...
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Page 15: Block Diagram
Service Manual- SC370 04 Control system 15 Block Diagram... -
Page 16: Component Locations
Service Manual- SC370 04 Control system 16 Component Locations • Safety switch lever • Flow adjustment button • Handlebar adjusting lever • Dashboard (EB1) • Battery capacity LED • Control board (EB2) • One-button start Battery capacity LED One-button start... -
Page 17: Control Panel Removal And Installation
Service Manual- SC370 04 Control system 17 Control Panel Removal and Installation Dashboard (EB1) Removal 1. Push the machine to a level floor. 2. Ensure that the machine is off. 3. Ensure the recovery tank is empty. 4. Remove the recovery tank assembly (Figure 5). - Page 18 Service Manual- SC370 04 Control system 18 8. Remove the safety switch lever assembly (Figure 9). 9. Remove 2 screws on the PCB fixing plate (Figure 10). 10. Take out the Dashboard (Figure 11). 11. Disconnect all harnesses and terminals connected to the Dashboard (Figure 12).
- Page 19 Service Manual- SC370 04 Control system 19 Control Board (EB2) Removal 1. Push the machine to a level floor. 2. Ensure that the machine is off. 3. Ensure the recovery tank is empty. 4. Remove the recovery tank assembly. 5. Disconnect the battery connector connected to the machine (Figure 6).
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Page 20: Specifications
Service Manual- SC370 04 Control system 20 Specifications Sample Shop Voltage Measurement The following tables contain some “real world” shop voltage measurements to help you recognize what “normal” looks like. • Unless otherwise noted, all voltage readings are referenced to GND. - Page 21 Service Manual- SC370 04 Control system 21 Dashboard (EB1) J2 Connector Pin# Color Function Condition Value Safety switch pressed 0.1V Start (Safety switch WHITE ≈4.6V signal) Safety switch released BLUE Figure 2. Connectors on Control Board (EB2) Control Board (EB2) J1 Connector...
- Page 22 Service Manual- SC370 04 Control system 22 Control Board (EB2) J2 Connector Pin# Color Function Condition Value Solenoid valve on, Ref ≈24V BLUE Solution + output Pin1 to Pin2 Solenoid valve off, Ref BROWN Solution - output Pin1 to Pin2...
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Page 23: Chassis System
Service Manual- SC370 10 Chassis System 23 10 Chassis System Chassis (main parts) The chassis is installed in the solution tank. Item Description CHASSIS ASSEMBLY BUSHING WASHER SCREW M8X25mm BRUSH LIFTING SUPPORT SCREW M8X30mm NUT M8 SCREW M8X50mm STEPS BUSHING... -
Page 24: Electrical System
Service Manual- SC370 24 Electrical System 24 24 Electrical System Functional Description The batteries (2 x 12V) are connected in series and supply power to the machine through connector C1. The battery charger (CH1) is connected to the machine by two connectors C2 and J3 (2-way signal connection). -
Page 25: Component Locations
Service Manual- SC370 24 Electrical System 25 Component Locations • Charger (CH1) • Brush motor fuses (F1&F2) • Battery connector (C1) • Vacuum motor fuse (F3) • Battery (BAT) • Solenoid valve circuit breaker (F4) • Charger AC plug • Brush release circuit breaker •... -
Page 26: Maintenance And Adjustment
Service Manual- SC370 24 Electrical System 26 Maintenance and Adjustment Machine Battery Type Setting According to the battery type (WET/GEL/AGM/DIS), set the machine as follows: 1. When one-button start (S3) is switched off, press flow increase switch and flow decrease switch (S5 and S6) at the same time. -
Page 27: Troubleshooting
Service Manual- SC370 24 Electrical System 27 Troubleshooting Trouble Possible causes Remedy The battery connector (C1) is not connected Connect The charger to control board terminal (J3) is not connected Connect Dashboard (EB1) is faulty Replace Can’t turn on the machine... - Page 28 Service Manual- SC370 24 Electrical System 28 7. Remove 2 screws, then remove the cover of distribution box (Figure 9). 8. Remove 2 screws, then remove the AC plug cover (Figure 10). 9. Pull out the charger AC plug (Figure 11).
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Page 29: Specifications
Service Manual- SC370 24 Electrical System 29 Battery Installation 1. Empty the recovery tank with drain hose. 2. Remove the recovery tank assembly (A, Figure 14). 3. The machine is equipped with battery cables suitable for installing 2X12V batteries. Carefully put the batteries into the compartment and install them as shown in the diagram near the batteries. -
Page 30: Electrical Wiring Diagram
Service Manual- SC370 24 Electrical System 30 Electrical Wiring Diagram... -
Page 31: Solution System
Service Manual- SC370 30 Solution System 31 30 Solution System Functional Description The solution system supplies water to the brush when cleaning the floor. The solution tank is also the main machine body. The solution flows from the tank to the filter and solenoid valve (EV1) and then to the brush deck. -
Page 32: Component Locations
Service Manual- SC370 30 Solution System 32 Component Locations • • C7&C8 connectors Solenoid valve (EV1) • • Solenoid valve circuit breaker (F4) Solution level hose Solenoid valve (EV1) Solution level hose Figure 1 Figure 2 Solenoid valve circuit breaker (F4) C7&C8 connectors... -
Page 33: Maintenance And Adjustment
Service Manual- SC370 30 Solution System 33 Maintenance and Adjustment Solution Filter Cleanin 1. Push the machine to a level floor. 2. Ensure that the machine is off. 3. Empty the solution tank (Advice). 4. Remove the cover (D, Figure 5), then remove the filter strainer (E). -
Page 34: Removal And Installation
Service Manual- SC370 30 Solution System 34 Removal and Installation Solenoid Valve (EV1) Removal Push the machine to a level floor. Ensure that the machine is off. Ensure the solution tank and recovery tank is empty. Remove the recovery tank assembly. -
Page 35: Specifications
Service Manual- SC370 30 Solution System 35 Specifications Description Unit Value Solution tank capacity L/Gal. 25 L / 6.6 Gal. Solution flow (max) per setting L/min 0.59/0.69/1.11/1.68 Ω ≈110 Solenoid valve coil resistance @25℃... -
Page 36: Scrub System
Service Manual- SC370 34 Scrub System 36 34 Scrub System Functional Description The rotating brush system cleans the surface of the floor. The main component of the brush system is the deck where brush or pad holder with pad whichever is suitable for the type of surface to be cleaned is installed. - Page 37 Service Manual- SC370 34 Scrub System 37 Brush motor current and the corresponding voltage at port J1-8: Brush Motor Volts at J1-8 (V) Current (A) (Battery voltage=26V) 0.39 0.84 1.26 1.72 2.15 If the brush motor is overloaded and the protection function of software is disabled, the fuses (F1&F2) will stop the brush to prevent continuous overload.
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Page 38: Eco Mode
Service Manual- SC370 34 Scrub System 38 ECO Mode When the ECO mode button is pressed, the control signal is transmitted to Control board (EB2) via port J1-5 (Brush PWM) and J1-6 (Vacuum PWM) to control the output of brush motor (M1) and vacuum motor (M2). And the brush and vacuum output MOSFET of Control board (EB2) will lower the voltage of brush motor and vacuum motor to about 18.5V via PWM regulation, reducing the current draw of brush motor and vacuum motor to reduce power... -
Page 39: Component Locations
Service Manual- SC370 34 Scrub System 39 Component Locations • • Brush motor (M1) Brush motor fuses (20A) (F1&F2) • • Brush deck Brush release relay • • C3&C4 connectors Brush release fuse C3&C4 connectors Brush motor (M1) Brush deck... -
Page 40: Troubleshooting
Service Manual- SC370 34 Scrub System 40 Troubleshooting Trouble Possible causes Remedy Brush does not clean properly The brush is excessively worn Replace There are ropes or debris restraining the brush rotation Remove the brush and clean it Wiring damaged... -
Page 41: Removal And Installation
Service Manual- SC370 34 Scrub System Removal and Installation Brush Motor (M1) Removal Push the machine to a level floor. Ensure that the machine is off. Ensure the recovery tank is empty. Remove the recovery tank assembly. Disconnect the battery connector (A) and move the batteries. - Page 42 Service Manual- SC370 34 Scrub System 10. Remove nut (F) and knob nut (G), and then remove spring (H). 11. Remove bolt (I) and bolt (J), and then remove bracket (K). 12. Remove bolt (L) and then remove brush hub (M).
- Page 43 Service Manual- SC370 34 Scrub System Brush Motor Carbon Brushes Removal Disconnect the electrical connections of the brush motor and remove the brush deck. Remove 2 screws (A) and the protection strip (B) on brush motor (C). For each of the motor’s four carbon brushes, disengage spring (D) and remove the carbon brush (E) from its seat, then detach the carbon brush by disengaging its electrical connection (F).
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Page 44: Specifications
Service Manual- SC370 34 Scrub System Specifications Description Unit Value Cleaning width Inches / mm 17 / 432 Brush motor power Brush motor rated voltage V DC Brush rotation speed (normal mode) Brush rotation speed (ECO mode) Brush motor normal no-load current... -
Page 45: Squeegee System
Service Manual- SC370 38 Squeegee System 45 38 Squeegee System Functional Description The squeegee system cleans the liquid off the floor, which is then collected by the recovery system. The squeegee is mounted on the squeegee bracket and the weight of the squeegee kit presses it down on the floor. -
Page 46: Component Locations
Service Manual- SC370 38 Squeegee System 46 Component Locations • • Brush deck bumper wheel Squeegee lifting handle • • Squeegee bumper wheel Squeegee knob • • Squeegee bracket Squeegee blades Brush deck bumper wheel Squeegee bumper wheel Squeegee lifting handle... -
Page 47: Maintenance And Adjustment
Service Manual- SC370 38 Squeegee System 47 Maintenance and Adjustment Squeegee cleaning 1. Push the machine to a level floor. 2. Ensure that the machine is off. 3. Lower the brush/pad-holder deck and the squeegee by lifting the pedal. 4. Disconnect the vacuum hose (B) from the squeegee connector (C). -
Page 48: Squeegee Blade Check And Replacement
Service Manual- SC370 38 Squeegee System 48 Squeegee blade check and replacement 1. Clean the squeegee as shown in the previous paragraph. 2. Check the condition of the front (A, Figure 3) and rear (C) blades, ensuring there are no cuts and tears; if necessary, replace them as shown below. -
Page 49: Removal And Installation
Service Manual- SC370 38 Squeegee System 49 Removal and Installation Squeegee assembly Installation Push the machine to a level floor. Ensure that the machine is off. Lower the brush/pad-holder deck by lifting the pedal. Place squeegee in the place between brush deck and front wheel. -
Page 50: Specifications
Service Manual- SC370 38 Squeegee System 50 Specifications Description Unit Value Machine width with squeegee mm/Inches 570 / 22.4... -
Page 51: Recovery System
Service Manual- SC370 40 Recovery System 51 40 Recovery System Functional Description The recovery system removes dirty water from the floor and pipes it to the recovery tank. When the machine is running, the dirty water on the floor is collected by the squeegee blades, and piped through the vacuum hose and into the tank by the airflow created by vacuum motor (M2). - Page 52 Service Manual- SC370 40 Recovery System 52 Vacuum motor current and the corresponding voltage at port J1-9: Vacuum Motor Volts at J1-9 (V) Current (A) (Battery voltage=26V) 0.46 0.96 1.52 2.07 2.54 The automatic float in the vacuum grid can prevent the vacuum motor (M2) from collecting any liquids.
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Page 53: Component Locations
Service Manual- SC370 40 Recovery System 53 Component Locations • Vacuum motor (M2) • Recovery water drain hose • C5&C6 connectors • Vacuum motor fuse (20A) (F3) • Squeegee vacuum hose • Vacuum motor connecting terminals C5&C6 connectors Vacuum motor (M2) -
Page 54: Maintenance And Adjustment
Service Manual- SC370 40 Recovery System 54 Maintenance and Adjustment 1. Push the machine to a level floor. 2. Ensure that the machine is off. 3. Turn the recovery tank lid (A) to 90 degrees position where it can be taken off from the recovery tank, and then take down the float ball filter (B) from the recovery tank lid. -
Page 55: Troubleshooting
Service Manual- SC370 40 Recovery System 55 Troubleshooting Trouble Possible causes Remedy The fuse (F3) has blown Replace Vacuum motor damaged Repair or replace Can’t turn on the vacuum motor Repair or replace Wiring damaged Control board (EB2) is faulty... -
Page 56: Removal And Installation
Service Manual- SC370 40 Recovery System 56 Removal and Installation Vacuum Motor (M2) Removal Push the machine to a level floor. Ensure that the machine is off. Ensure the recovery tank is empty. Remove the recovery tank assembly. Disconnect the battery connector connected to the machine. -
Page 57: Specifications
Service Manual- SC370 40 Recovery System 57 Specifications Description Unit Value Recovery tank capacity L/Gal. 25 / 6.6 Vacuum motor technical data V DC Vacuum capacity (normal mode) In of H O (mm of H 33 (900) Vacuum capacity (ECO mode)
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