Nilfisk-Advance SCRUBTEC 344 Series Service Manual
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Nilfisk-Advance SCRUBTEC 344 Series Service Manual

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SC401, SCRUBTEC 344
Service Manual
Advance Model Numbers:
9087394020 SC401 17 B
9087395020 SC401 17 BD
Nilfisk Model Numbers:
9087391020 SC401 43 B
9087390020 SC401 43 B FULL PKG
9087392020 SC401 43 E
9087393020 SC401 43 BD
9087398020 SC401 43 BD FULL PKG
9087396020 SCRUBTEC 344 B COMBI
9087397020 SCRUBTEC 344 E
07/2018 (B) Form No. 9100002300
English

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  • Page 1 SC401, SCRUBTEC 344 Service Manual Advance Model Numbers: Nilfisk Model Numbers: 9087394020 SC401 17 B 9087391020 SC401 43 B 9087395020 SC401 17 BD 9087390020 SC401 43 B FULL PKG 9087392020 SC401 43 E 9087393020 SC401 43 BD 9087398020 SC401 43 BD FULL PKG 9087396020 SCRUBTEC 344 B COMBI 9087397020 SCRUBTEC 344 E English...

  • Page 2: Table Of Contents

    Service Manual – SC401, SCRUBTEC 344 Contents Contents 03 - General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Machine General Description Service Manual Purpose and Field of Application Other Reference Manuals...
  • Page 3 Service Manual – SC401, SCRUBTEC 344 Contents 05 - Control System - Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Functional Description Wiring Diagram Component Locations...
  • Page 4 Service Manual – SC401, SCRUBTEC 344 Contents 24 - Electrical System (Battery) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 Functional Description Battery Charge State Display Wiring Diagram...
  • Page 5 Service Manual – SC401, SCRUBTEC 344 Contents 38 - Squeegee System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 Functional Description Component Locations Maintenance and Adjustments...

  • Page 6: 03 - General Information

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Machine General Description The SC401, SCRUBTEC 344 is a “walk-behind” scrubber industrial machine designed to wash and dry floors in one pass The machine is powered by on-board batteries or cord power supply The machine features a floor disc brush, controlled detergent solution dosing and a rear squeegee with rubber blades that vacuums and dries the floor.

  • Page 7: Service Manual Purpose And Field Of Application

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Service Manual Purpose and Field of Application The Service Manual is a technical resource intended to help service technicians when carrying out maintenance and repairs on the scrubbers, 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...

  • Page 8: Conventions

    Service Manual – SC401, SCRUBTEC 344 03 - 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 Name Plate Reference to Figure 2 The machine serial number and model name are marked on the plate (see the example to the side) Model number and year of production (Date...

  • Page 9: Safety

    Service Manual – SC401, SCRUBTEC 344 03 - 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 Visible Symbols on the Machine WARNING: Carefully read all the instructions before performing any operation on the machine.

  • Page 10: General Safety Instructions

    Service Manual – SC401, SCRUBTEC 344 03 - General Information General Safety Instructions Specific warnings and cautions to inform about potential damages to people and machine are shown below. DANGER: BATTERY MODELS − Before performing any machine maintenance, repair, cleaning or replacement procedure, disconnect the battery connector and remove the ignition key (if equipped).
  • Page 11 Service Manual – SC401, SCRUBTEC 344 03 - General Information CAUTION: CORD MODELS − The machine power supply cable is grounded and the relevant plug is grounded too. In case of machine malfunction or breakdown, grounding connection reduces the risk of electric shock.
  • Page 12 Service Manual – SC401, SCRUBTEC 344 03 - General Information CAUTION: ALL MODELS − Carefully read all the instructions before performing any maintenance/repair procedure. − 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.
  • Page 13 Service Manual – SC401, SCRUBTEC 344 03 - General Information − 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. −...

  • Page 14: Lifting The Machine

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Lifting The Machine WARNING: Do not work under the lifted machine without supporting it with safety stands. Transporting The Machine WARNING: Before transporting the machine, make sure that: − All covers are closed. −...

  • Page 15: Technical Specifications

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Technical Specifications Battery Models Model SC401, SCRUBTEC 344 No Drive Drive Solution tank capacity 7,9 US gal (30 liters) Recovery tank capacity 7,9 US gal (30 liters) Machine length 46,5 in (1.180 mm) Machine width with squeegee 28 in (720 mm) Machine width without squeegee...
  • Page 16 Service Manual – SC401, SCRUBTEC 344 03 - General Information Model SC401, SCRUBTEC 344 No Drive Drive Total power draw (EN 60335-2-72) 21 A (0,5 kW) 25 A (0,6 kW) IP protection class Protection class (electric) III (I for on board battery charger) Battery compartment size 13,8 x 13,8 x 10,2 in (350 x 350 x 260 mm) System voltage...

  • Page 17: Cord Models

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Cord Models Model SC401, SCRUBTEC 344 Solution tank capacity 7,9 US gal (30 liters) Recovery tank capacity 7,9 US gal (30 liters) Machine length 46,4 in (1.180 mm) Machine width with squeegee 28,3 in (720 mm) Machine width without squeegee 18 in (458 mm)

  • Page 18: Maintenance Schedule

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Maintenance Schedule Battery Models Weekly/ Daily, Every 6 Procedure Annually after use Monthly Months Battery Charging Squeegee Cleaning Brush/pad cleaning Recovery tank, debris tray, and vacuum grid with float cleaning, and cover gasket check Detergent System cleaning and washing Squeegee blade check Solution Filter Cleaning...

  • Page 19: Know Your Machine (Battery)

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Know Your Machine (Battery) Control Panel View Operator’s presence Operator’s presence sensors sensors Reverse gear switch (only for drive version) Speed adjuster (only for Battery level Led’s drive version) Solution button (3 level) Vacuum system button Main machine start and stop button...

  • Page 20: Rear/Left Machine View

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Rear/Left Machine View Drive handlebar Control panel Recovery tank cover Recovery water drain hose Recovery tank Battery charger cable Battery charger cable housing Tank lifting and document handle holder Serial number plate/technical Solution drain data/conformity...

  • Page 21: Front/Right Machine View

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Front/Right Machine View Recovery water tank cover Recovery tank Solution tank filler plug Solution tank Solenoid valve Squeegee Disc brush deck Solution valve Rear wheels Brush Figure 5:...

  • Page 22: Know Your Machine (Cord)

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Know Your Machine (Cord) Control Panel View Operator’s presence Operator’s presence sensors sensors Solution button (3 level) Vacuum system button Main machine start and stop button Start switch (0 - I) Figure 6:...

  • Page 23: Rear/Left Machine View

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Rear/Left Machine View Drive handlebar Control panel Recovery tank cover Recovery water drain hose Recovery tank Power supply cable holder Power supply Tank lifting cable holder handle Serial number plate/technical Solution drain data/conformity and level check...

  • Page 24: Front/Right Machine View

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Front/Right Machine View Recovery water tank cover Recovery tank Solution tank filler plug Solution tank Solenoid valve Squeegee Disc brush deck Solution valve Brush Figure 8:...

  • Page 25: Service And Diagnostic Equipment

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Service and Diagnostic Equipment Besides a complete set of standard meters, the following instruments are necessary to perform fast checks and repairs on Nilfisk machines: • Laptop computer charged with the current version of EzParts, Adobe Reader and (if possible) Internet connection •...
  • Page 26 Service Manual – SC401, SCRUBTEC 344 03 - General Information Service and Diagnostic Equipment (continues) • Service Tool module NEO P/N 101221030 • NilfiskServiceTool software installed on the Laptop computer (see the Service tool installation guide or open the Internet browser, and type in the serveradress: https://ftp niladv org Type in Login ID and Password...

  • Page 27: Dimensions

    Service Manual – SC401, SCRUBTEC 344 03 - General Information Dimensions 28.3 in (720 mm) 47 in (1196mm) Figure 12:...

  • Page 28: 04 - Control System - Battery

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Functional Description The (electrical) functions of the machine and of By pressing (for 2 sec ) the Main button when the the Main Machine Controller (EB1) are controlled machine is running, the brushing (with the solution via the handlebar with the 3 buttons on the User flow preset to level 1) and vacuum (full power)
  • Page 29 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main machine controller (EB1) Reverse gear switch (SW1) Operator’s presence sensor (S2) Speed adjuster (RV1) User interface controller (EB2) Ignition key (K1)

  • Page 30: Functional Block Diagram (No Drive)

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Functional Block Diagram (no Drive) RH OPERATOR’S LH OPERATOR’S PRESENCE SENSOR (S1) PRESENCE SENSOR (S2) USER INTERFACE 24 V BATTERIES (BAT) CONTROLLER (EB2) Serial Bus Main Battery Power Power MAIN MACHINE CONTROLLER (EB1)

  • Page 31: Functional Block Diagram (Drive)

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Functional Block Diagram (Drive) SPEED POTENTIOMETER REVERSE (RV1) GEAR SWITCH (SW1) RH OPERATOR’S LH OPERATOR’S PRESENCE SENSOR (S1) PRESENCE SENSOR (S2) USER INTERFACE CONTROLLER (EB2) 24 V BATTERIES (BAT) IGNITION KEY (KEY) Serial Bus Main Battery Power...

  • Page 32: Wiring Diagram

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Wiring Diagram MAIN MACHINE CONTROLLER RELAY (ES1) B/R.1 24V (LOGIC) Power supply + (permanent) B+ 24V (POWER) KEY.1 MAIN MACHINE FUSE KEY.2 CONTROLLER RELAY (ES1) MAIN MACHINE CONTROLLER (EB1) B/R.3 Power relay - BASE MACHINE (WITHOUT BATTERY CHARGER AND KEY)

  • Page 33: Component Locations

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Component Locations Reverse gear switch (SW1) Operator’s presence sensor (S2) Speed adjuster (RV1) User interface controller (EB2) Ignition key (K1) Main machine controller (EB1) Figure 4:...

  • Page 34: Maintenance And Adjustments

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Maintenance and Adjustments Parameter Machine Settings Parameters can be viewed by connecting the NEO Service Tool module, P/N 101221030 (A) to the Main Machine Controller (EB1) (B) If equipped remove the ignition key, then disconnect the red battery connector Unscrew the 4 screws and remove the electronic component compartment cover Figure 5: Connect the cable marked PROG (C) to connector (D) and the cable marked SERVICE (E) to connector...
  • Page 35 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Parameter Machine Settings (continues) Connect the USB cable (G) of the NEO Service Tool module to a laptop computer (H) and start the NilfiskServiceTool software. Enter the Service/Tech access level password to the menù “SETTINGS” (I): Access level Password Developer...
  • Page 36 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Machine Settings (continues) Permissions: - = not visible R = read only W = read & write Parameter Description Softstart Brush (ms) 0-25000 Softstop Brush (ms) 0-2500 Softstart Vacuum (ms) 0-25000 Softstop Vacuum (ms) 0-2500...

  • Page 37: Troubleshooting

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Troubleshooting General System Fault Code Display on the control Meaning Conditions What to do Reset panel 6 battery Brush motor Brush motor current higher Check if there is dust or Turn off the machine LEDs flashing.

  • Page 38: Removal And Installation

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Removal and Installation Main Machine Controller (EB1) WARNING: Electrostatic sensitive device, observe precautions for handling. Use the specific ESD gloves. The operator should not wear a sweater, fleece or other wool or synthetic clothing when changing the PCB.
  • Page 39 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) Disconnect the following connections: ◦ (C) and (D), main machine controller power supply connection (J106 B+) and (J107 B-) Figure 10: ◦ (E) and (F) Vacuum motor connection (J403 OUT2) Figure 11:...
  • Page 40 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) ◦ (G) and (H) Brush motor connection (J303 OUT1) Figure 12: ◦ (I) Solenoid valve connection (J601 AUX1) Figure 13: ◦ (J) Detergent pump connection (J602 AUX2) Figure 14:...
  • Page 41 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) ◦ (K) Hour meter connection (J604 AUX4) Figure 15: ◦ (L) User interface controller power connection (J105 BTN) Figure 16: ◦ (M) User interface controller connection (J204 EXT) Figure 17:...
  • Page 42 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) ◦ (N) Drive wheels controller connection (JJ209 D4) Figure 18: ◦ (O) Main machine controller connection (J104 BATTERY/RELAY) Figure 19: ◦ (P) Ignition key connection (J101 KEY) Figure 20:...
  • Page 43 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) Unscrew the 2 screws (Q) and pull out the Main machine controller (R) with his support bracket Unscrew the 4 screws (S) and cerefully remove the Main machine controller (T) Figure 21: Assemble the components in the reverse order of disassembly...

  • Page 44: User Interface Controller (Eb2) And Operator's Presence Sensors (S1, S2)

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery User Interface Controller (EB2) and Operator’s Presence Sensors (S1, S2) User Interface Controller (EB2) If equipped remove the ignition key, then disconnect the red battery connector Unscrew the 2 screws (A) and open the user interface controller cover (B) Disconnect the following connections: ◦...
  • Page 45 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Operator’s Presence Sensors (S1, S2) After removing the user interface controller cover and its connections, unscrew the 4 screws (G) then remove the handlebar (H) At the workbench, unscrew the 7 screws (I) the open the two handlebar parts front and back Disconnect the connection (J), with the screwdriver carefully remove the operator’s presence sensor (K) detaching it from the support Clean the support area from the glue remained of the operator’s presence sensor removed...

  • Page 46: Specifications

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Specifications Main Machine Controller (EB1) Connectors J106, J107 BATTERY: bolt M5 Controller Description V ref. I max. Connected to in/out Vbatt + BAT+ Vbatt - BAT- Figure 24: J303 OUT1: type FCI T702035100J0G (2 ways, screw type) Controller Description...
  • Page 47 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) Connectors (continues) J403 OUT2: type FCI T702035100J0G (2 ways, screw type) Controller Description V ref. I max. Connected to in/out Vacuum output + Vacuum output - Figure 26: J601 AUX1: type JST B2P-VH (2 ways, vertical) Controller...
  • Page 48 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) Connectors (continues) J602 AUX2: type JST B2P-VH (2 ways, vertical) Controller V ref. I max. Connected to Description in/out Detergent pump output + Detergent pump output - Figure 28: J604 AUX4: type JST B2P-VH (2 ways, vertical) Controller...
  • Page 49 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) Connectors (continues) J204 EXT: LEOCO 3675P12VTA0 (12 ways, vertical) Description Controller V ref. I max. Connected to in/out Power supply + UI.J201.6 <1A Power supply - UI.J201.5 <1A SPI MISO...
  • Page 50 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) Connectors (continues) J105 BTN: JST B2B-EH-A (2 ways, vertical) Description Controller V ref. I max. Connected to in/out Power button output UI.J201.8 <1A Power button input UI.J201.7 <1A Figure 31:...
  • Page 51 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) Connectors (continues) J104 BATTERY/RELAY: JST B3P-VH (3 ways, vertical) Description Controller V ref. I max. Connected to in/out Power supply + (permanent) Power relay + ES1.86 <1A Power relay -...
  • Page 52 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) Connectors (continues) J108 TRACKCLEAN POWER JST B2P-VH (2 ways, vertical) Description Controller V ref. I max. Connected to in/out Supply 0V (permanent) TRK.BU <1A Supply +24V (permanent) TRK.RD <1A...

  • Page 53: User Interface Controller (Eb2) Connectors

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery User Interface Controller (EB2) Connectors J201: SJT S8B-PH-SM4-TB (8 ways, vertical) Description Controller V ref. I max. Connected to in/out SPI clock 0-5V EXT.6 <1A SPI MOSI In-out 0-5V EXT.4 <1A...
  • Page 54 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery User Interface Controller (EB2) Connectors (continues) RIGHT: JST S3B-ZR-SM4A-TF (3 ways, side entry) Description Controller V ref. I max. Connected to in/out Right operator presence sensor supply - S2.1 <1A Right operator presence sensor supply +...

  • Page 55: Shop Measurements

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Shop Measurements The following tables contain some “real world” shop voltage measurements to help you recognize what “normal” looks like All voltage values were measured with the black (Negative) voltmeter lead connected to the main battery negative unless otherwise specified.
  • Page 56 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) Brush Motor Figure 41: Color Description Measured Comments Brush motor + 24.14 (OFF) Blue 23.79 (ON) Brown Brush motor - 24.14 (OFF) 3.81 (ON) Vacuum System Motor Figure 42: Color...
  • Page 57 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) Solenoid Valve Figure 43: Color Description Measured Comments Solenoid valve power supply + 23.56 V All levels Blue Brown Solenoid valve power supply - 0.070 V Max level Detergent Pump...
  • Page 58 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) Hourmeter Figure 45: Color Circuit Description Measured Comments Hourmeter power supply + 23.47 V Black Hourmeter power supply - 0.047 V With drive enable User Interface Controller Figure 46: Color...
  • Page 59 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) Figure 47: Color Circuit Description Measured Comments Power button output 23.84 V (OFF) 23.75 V (ON) Power button input 0.00 V (OFF) Blue 23.84 V (While pressing Main button) Figure 48: Color...
  • Page 60 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery Main Machine Controller (EB1) (continues) Battery / Relay Figure 49: Color Circuit Description Measured Comments Power supply + (permanent) 24.18 V Connected to B+ Black Power relay + 23.8 V (OFF) Connected to PTC FUSE...

  • Page 61: User Interface Controller (Eb2)

    Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery User Interface Controller (EB2) Measure and record the voltage at each of the Main machine controller pins Always use battery negative as your reference point for your black voltmeter lead J201 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8...
  • Page 62 Service Manual – SC401, SCRUBTEC 344 04 - Control System - Battery User Interface Controller (EB2) (continues) Right Operator’s Presence Sensor 1 2 3 1 2 3 Figure 53: Color Circuit Description Measured Comments Right operator presence sensor 0.03 V Machine ON supply - Black...

  • Page 63: 05 - Control System - Cord

    Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Functional Description The (electrical) functions of the machine and of Brush rotation and the activation of the pump, the Main Machine Controller (EB1) are controlled however, also require the activation of at least 1 of via the handlebar with the 3 buttons on the User Interface Controller (EB2) and activation of the the 2 Operator presence sensors...

  • Page 64: Wiring Diagram

    Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Wiring Diagram RIGHT.2 Right op. pres. sensor supply + RIGHT.1 Right op. pres. sensor supply - MAIN MACHINE CONTROLLER (EB1) USER INTERFACE Power button output J201.8 Power button output CONTROLLER (EB2) Power button input J201.7...

  • Page 65: Component Locations

    Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Component Locations Operator’s presence sensor (S2) User interface controller (EB2) Start switch (SW1) Main machine controller (EB1) Figure 2:...

  • Page 66: Maintenance And Adjustments

    Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Maintenance and Adjustments Parameter Machine Settings Parameters can be viewed by connecting the NEO Service Tool module, P/N 101221030 (A) to the Main Machine Controller (EB1) (B) If equipped remove the ignition key, then disconnect the red battery connector Unscrew the 4 screws and remove the electronic component compartment cover Figure 3: Connect the cable marked PROG (C) to connector (D) and the cable marked SERVICE (E) to connector...
  • Page 67 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Parameter Machine Settings (continues) Connect the USB cable (G) of the NEO Service Tool module to a laptop computer (H) and start the NilfiskServiceTool software. Enter the Service/Tech access level password to the menù “SETTINGS” (I): Access level Password Developer...
  • Page 68 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Permissions: - = not visible R = read only W = read & write Parameter Description Stopdelay Brush (ms) 0-25000 3000 Stopdelay Vacuum (ms) 0-25000 5000 T1on Pump state1 on time (ms) 5-255 T1off Pump state1 off time (ms)

  • Page 69: Removal And Installation

    Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Removal and Installation Main Machine Controller (EB1) WARNING: Electrostatic sensitive device, observe precautions for handling. Use the specific ESD gloves. The operator should not wear a sweater, fleece or other wool or synthetic clothing when changing the PCB.
  • Page 70 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Main Machine Controller (EB1) (continues) Identify connections beforehand by marking the cables with some tape and a marker, as shown below: ◦ (D) Start switch connection (SW1) ◦ (E) Brush motor connection (M1) ◦...
  • Page 71 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Main Machine Controller (EB1) (continues) ◦ (E) Brush motor (M1) connection Figure 10: ◦ (F) Vacuum motor (M2) connection Figure 11:...
  • Page 72 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Main Machine Controller (EB1) (continues) ◦ (G) Solenoid valve (EV1) connection Figure 12: ◦ (H) Earth connection Figure 13:...
  • Page 73 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Main Machine Controller (EB1) (continues) ◦ (I) User interface controller (EB2) power button connection Figure 14: ◦ (K) User interface controller (EB2) connection Figure 15:...
  • Page 74 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Main Machine Controller (EB1) (continues) Unscrew the 4 screws (J) and cerefully remove the Main machine controller (L) Figure 16: Assemble the components in the reverse order of disassembly...

  • Page 75: User Interface Controller (Eb2) And Operator's Presence Sensors (S1, S2)

    Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord User Interface Controller (EB2) and Operator’s Presence Sensors (S1, S2) User Interface Controller (EB2) Make sure that the scrubber is disconnected from the power supply Unscrew the 2 screws (A) and open the user interface controller cover (B) Disconnect the following connections: ◦...

  • Page 76: Operator's Presence Sensors (S1, S2)

    Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Operator’s Presence Sensors (S1, S2) After removing the user interface controller cover and its connections, unscrew the 4 screws (G) then remove the handlebar (H) At the workbench, unscrew the 7 screws (I) the open the two handlebar parts front and back Disconnect the connection (J), with the screwdriver carefully remove the operator’s presence sensor (K) detaching it from the support Clean the support area from the glue remained of the operator’s presence sensor removed...

  • Page 77: Specifications

    Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Specifications Main Machine Controller (EB1) Connectors MAINS: type 2 x faston 6,3 x 0,8 mm Controller Description V ref. I max. Connected to in/out Mains 230Vac Mains 230Vac Figure 19: GROUND: type faston 6,3 x 0,8 mm Controller...
  • Page 78 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Main Machine Controller (EB1) Connectors (continues) OUT1: type 2 x faston 6,3 x 0,8 mm Controller Description V ref. I max. Connected to in/out Brush output 230Vac Brush output 230Vac Figure 21: OUT2: type 2 x faston 6,3 x 0,8 mm...
  • Page 79 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Main Machine Controller (EB1) Connectors (continues) OUT3: type 2 x faston 6,3 x 0,8 mm Controller Description V ref. I max. Connected to in/out Solution valve output 230Vac Solution valve output 230Vac Figure 23:...
  • Page 80 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Main Machine Controller (EB1) Connectors (continues) EXT: LEOCO 3675P12VTA0 ( ) (12 ways, vertical) Controller Description V ref. I max. Connected to in/out Power supply + UI.J201.6 <1A Power supply - UI.J201.5 <1A...
  • Page 81 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord Main Machine Controller (EB1) Connectors (continues) J211 A: JST B2B-EH-A (LF)(SN) (2 ways, vertical) Controller Description V ref. I max. Connected to in/out Power button output UI.J201.8 <1A Power button input UI.J201.7 <1A...

  • Page 82: User Interface Controller (Eb2) Connectors

    Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord User Interface Controller (EB2) Connectors J201: SJT S8B-PH-SM4-TB (8 ways, vertical) Description Controller V ref. I max. Connected to in/out SPI clock 0-5V EXT.6 <1A SPI MOSI In-out 0-5V EXT.4 <1A...
  • Page 83 Service Manual – SC401, SCRUBTEC 344 05 - Control System - Cord User Interface Controller (EB2) Connectors (continues) RIGHT: JST S3B-ZR-SM4A-TF (3 ways, side entry) Description Controller V ref. I max. Connected to in/out Right operator presence sensor supply - S2.1 <1A Right operator presence sensor supply +...

  • Page 84: 10 - Chassis System

    Service Manual – SC401, SCRUBTEC 344 10 - Chassis System Chassis (Main Parts) The chassis function is primarily performed by the solution tank, the support housings for the wheels and working mechanisms are integrated in the gear motor unit (Drive model) and the rear frame Reference to the Figure: •...

  • Page 85: 14 - Wheel System, Non-Traction

    Service Manual – SC401, SCRUBTEC 344 14 - Wheel System, Non-Traction Functional Description The machine wheel system without drive system consists of front wheels and a pair of pivoting rear wheels The front wheel system is the main machine support and pivot of the lifting and lowering brush deck mechanism Component Locations Front wheels...

  • Page 86: Specifications

    Service Manual – SC401, SCRUBTEC 344 14 - Wheel System, Non-Traction Specifications SC401, SCRUBTEC 344 Description / Model No Drive Front wheel diameter 7.8 in (200 mm) Front wheel specific pressure on the floor (*) 116 psi (0,8 N/mm Rear wheel diameter 3,1 in (80 mm) Rear wheel specific pressure on the floor (*) 116 psi (0,8 N/mm...

  • Page 87: 20 - Wheel System, Traction

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Functional Description The machine wheel system with drive system consists of front wheels with gearmotor (M3) and a pair of pivoting rear wheels The Gear motor unit (M3) with electric motor, reduction unit, differential and drive wheels is the main machine support and fastening element of the brush deck lifting and lowering mechanism Using the Operator presence sensor (S1, S2), the operator can start the machine The Speed adjuster (RV1) adjusts the transfer speed To reverse the machine, press the Reverse Gear Switch (SW1)

  • Page 88: Wiring Diagram

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Wiring Diagram MAIN MACHINE CONTROLLER DRIVE MOTOR FUSE (F3) RELAY (ES1) B+ 24V (POWER) +24 Potenza B+ 24V (POWER) DRIVE WHEELS DRIVE CONTROLLER (EB3) MOTOR (M4) Positive forward speed motor output MAIN MACHINE CONTROLLER (EB1) KEY.1 Key output...

  • Page 89: Component Locations

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Component Locations Gear motor unit (M3) Rear pivoting wheel Driving wheels Drive wheels controller (EB3) Figure 2:...

  • Page 90: Maintenance And Adjustments

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Maintenance and Adjustments Drive Motor Clenanig Drive the machine on a level floor or on a hoisting system to facilitate the procedures. If equipped remove the ignition key, then disconnect the red battery connector Under the machine, check and clean the drive motor (A) by using compressed air nozzle (B) from the dirt/dust that could compromise its correct function (overheating, overvoltage ect ) Figure 3:...

  • Page 91: Drive Wheels Controller (Eb3) Parameters

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Drive Wheels Controller (EB3) Parameters The parameters are accessible when connect the connector (A) of the ITALSEA programmer P/N 1466207000, to the 4-way connector (B) on the Drive wheels controller Figure 4:...
  • Page 92 Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Drive Wheels Ccontroller (EB3) Parameters (continues) NAME Description Default value Acceleration ramp ACELERATION RAMP Reverse deceleration ramp REVERSE RAMP Neutral deceleration ramp NEUTRAL RAMP Forward maximum speed FORWARD SPEED Backward maximum speed BACKWARD SPEED Minimum speed...

  • Page 93: Troubleshooting

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Troubleshooting Trouble Possible Causes Remedy The machine does not move Battery voltage too low Charge the battery Speed adjuster (RV1) incorrectly regulated or Replace broken One or both Operator’s presence sensors Replace (S1, S2) faulty Main machine controller (EB1) faulty...

  • Page 94: Drive Wheels Controller (Eb3) Alarms

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Drive Wheels Controller (EB3) Alarms Diagnostic LED Figure 5: Display of Drive wheels controller Meaning Conditions What to do Reset (EB3) diagnostic Example of 3 blinking: 3 flashes Speed adjuster Signal input out of range Check Speed adjuster Turn off the machine using...
  • Page 95 Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Display of Drive wheels controller Meaning Conditions What to do Reset (EB3) diagnostic 8 flashes Power supply fault Drive motor fuse open or Check the conditions of Turn off the machine using Drive wheels controller inner the Drive motor fuse (F3) the Ignition key (KEY)

  • Page 96: Drive System Gear Motor Current Draw Test

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Drive System Gear Motor Current Draw Test WARNING: This procedure must be performed by qualified personnel only and with the help of an assistant. Drive the machine on a level floor. Use a suitable chock to raise one side of the machine approximately 2cm from the floor and allow one drive wheel to turn freely WARNING: Pay attention to the rotation of the driving wheel when performing the following steps.

  • Page 97: Removal And Installation

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Removal and Installation Drive Wheels Controller (EB3) If equipped remove the ignition key, then disconnect the red battery connector Unscrew the 4 screws and remove the electronic component compartment cover Unscrew the 2 screws (A) and pull out the Drive wheels controller (B) with his support bracket Disconnect the following connections: ◦...
  • Page 98 Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Drive Wheels Controller (EB3) (continues) Unscrew the 2 screws (H) and cerefully remove the Drive wheels controller (I) Figure 8: Assemble the components in the reverse order of disassembly...

  • Page 99: Drive System Gearmotor

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Drive System Gearmotor WARNING: This procedure must be performed by qualified personnel only and with the help of an assistant. Drive the machine on a level floor or on a hoisting system to facilitate the disassembly procedures. If equipped remove the ignition key, then disconnect the red battery connector Remove the squeegee Lift the recovery tank and remove the batteries...
  • Page 100 Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Drive System Gearmotor (continues) Retrieve the 2 keys (E), the 2 washers (F) and the 2 circlips (G) Unscrew the 3 screws (H) from the brush deck levers and retrieve the bushings Remove the clamp (I) and disconnect the Drive system gear motor (J) 10 Unscrew the 4 screws (K) and retrieve the washers, then remove the Drive system gear motor (L) Figure 10:...

  • Page 101: Specifications

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Specifications Drive Wheels Controller (EB3) Connectors FASTON Controller Description V ref. I max. Connected to in/out Vbatt + BAT+ Vbatt - BAT- Figure 11: FASTON Controller Description V ref. I max.
  • Page 102 Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Drive Wheels Controller (EB3) Connectors (continues) MOLEX MINIFIT Controller Description V ref. I max. Connected to in/out Brush output + POT. + RV1.1 Brush output - POT. IN RV1.2 POT.

  • Page 103: Shop Measurements

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Shop Measurements Drive Wheels Controller (EB3) Battery volts at battery, key on = 24 27V Power Supply Figure 14: Color Description Measured Comments Main machine controller power supply + 24.15 V No functions Black Main machine controller power supply - 0.00 V...
  • Page 104 Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Shop Measurements - Main machine controller (EB1) (continues) Power Supply Figure 16: Color Description Measured Comments Brush output + POT. + 13.82 V Vref PIN 3 -> Min speed White Brush output - POT.

  • Page 105: Specifications

    Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction Specifications SC401, SCRUBTEC 344 Description / Model Drive Driving wheel diameter 7.8 in (200 mm) Driving wheel specific pressure on the floor (*) 116 psi (0,8 N/mm Rear wheel diameter 3.1 in (80 mm) Rear wheel specific pressure on the floor (*) 290 psi (2,0 N/mm...

  • Page 106: Electrical System (Battery)

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Functional Description The machine electrical system is mainly composed of • Wheel drive controller (EB3) (if present): it the following components: powers the Drive motor (M4) • Battery: lead battery pack with 24V nominal •...

  • Page 107: Battery Charge State Display

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Battery Charge State Display Low Voltage Cut Out The Main machine controller (EB1) shuts off electrical loads to protect the batteries from damage caused by over discharging The voltage threshold where loads are turned off depends on the battery type See table below Significant Levels for Machine Operation Voltage in Voltage in...

  • Page 108: Wiring Diagram

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Wiring Diagram MAIN MACHINE CONTROLLER KEY.1 RELAY (ES1) KEY.2 MAIN MACHINE B/R.1 24V (LOGIC) Power supply + (permanent) CONTROLLER (EB1) B+ 24V (POWER) BASE MACHINE (WITHOUT BATTERY CHARGER AND KEY) BATTERY CHARGE BATTERY MAIN MACHINE...

  • Page 109: Component Locations

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Component Locations Main machine Battery charger (CH) controller relay (ES1) Main machine controller (EB1) Drive motor fuse (F1) Figure 2: Battery connections Batteries (BAT) Battery red connector Figure 3:...

  • Page 110: Maintenance And Adjustments

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Maintenance and Adjustments Setting the Installed Battery Type Set the electronic board of the machine according to the type of batteries installed (WET or GEL) as shown below: (If equipped) Turn the ignition key to “I” Press the main push-button to turn on the machine, then detect the current setting by checking in the very first seconds the battery symbol LED flashing.

  • Page 111: Battery Charger Setting And Dipswitches Configuration

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Battery Charger Setting and Dipswitches Configuration If equipped remove the ignition key, then disconnect the red battery connector Unscrew the 4 screws (A) and remove the electronic component compartment cover (B) Unplug the connection of the on-board battery charger Unscrew the 4 screws (C) and remove the on-board battery charger (D) Figure 5:...
  • Page 112 Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Battery Charger Setting and Dipswitches Configuration (continues) Remove the round black cap (E) located close to the openings on the bottom of the charger, using a tool like a screwdriver Figure 6: Change the dipswitch configuration as the tabel below: BATTERY CHARGER...

  • Page 113: Battery Installation

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Battery Installation If equipped remove the ignition key, then disconnect the red battery connector Lift the recovery tank cover and check that it is empty; if not, empty it using the drain hose Grasp the handle and carefully lift the recovery tank The machine is supplied with cables suitable to install two 12 V batteries Carefully lift the batteries up to the compartment, then install them correctly...

  • Page 114: Battery Charging

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Battery Charging Note: Charge the battery when only one LED of the battery symbol is flashing, or at the end of each shift. 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.
  • Page 115 Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Battery Charging (continues) Battery Charging with On-Board Battery Charger Installed on the Machine Connect the on-board battery charger cable to the electrical mains Electrical mains voltage and frequency must be compatible with the on-board battery charger values shown on the machine serial number plate Note: When the on-board battery charger is connected to the electrical mains, all machine functions are automatically cut off.

  • Page 116: Checking/Replacing Relay Or Fuses

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Checking/Replacing Relay or Fuses If equipped remove the ignition key, then disconnect the red battery connector Unscrew the 4 screws and remove the electronic component compartment cover Check/replace the following Relay or Fuses: ◦...

  • Page 117: Troubleshooting

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Troubleshooting See the other chapters for previously provided instructions for other electrical system components Trouble Possible Causes Remedy The machine is not working The batteries (BAT) flat or connections sre Charge the batteries or faulty clean the connections...

  • Page 118: Complete Wiring Diagram (Battery No Drive)

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Complete Wiring Diagram (Battery no Drive) MAIN MACHINE CONTROLLER RELAY (ES1) KEY.1 KEY.2 B/R.1 24V (LOGIC) Power supply + (permanent) MAIN MACHINE CONTROLLER (EB1) B+ 24V (POWER) BASE MACHINE (WITHOUT BATTERY CHARGER AND KEY) BRUSH MOTOR (M1) BATTERY CHARGE...

  • Page 119: Complete Wiring Diagram (Battery Drive)

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Complete Wiring Diagram (Battery Drive) MAIN MACHINE CONTROLLER DRIVE MOTOR FUSE (F3) RELAY (ES1) KEY.1 KEY.2 B/R.1 24V (LOGIC) Power supply + (permanent) B+ 24V (POWER) +24 Potenza MAIN MACHINE CONTROLLER (EB1) B+ 24V (POWER) BASE MACHINE (WITHOUT BATTERY CHARGER AND KEY)

  • Page 120: Specifications

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Battery) Specifications Description / Model SC401 / SCRUBTEC 344 IP protection class Protection class (electric) III (I for on-board battery charger) Battery compartment size 13,8 x 13,8 x 10,2 in (350 x 350 x 260 mm) Advance: 98 Ah C20 GEL / 105 Ah C20 Standard batteries (q.ty 2) Nilfisk: 12V-76 Ah GEL MONOBLOC...

  • Page 121: Electrical System (Cord)

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Cord) Functional Description The machine electrical system is composed of the following components: • Power supply cable with dedicated mains plug • Main switch (SW1): turns the machine on and off •...

  • Page 122: Troubleshooting

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Cord) Troubleshooting See the other chapters for previously provided instructions for other electrical system components Trouble Possible Causes Remedy The machine is not working The power supply cable or plug is broken Replace the cable The Main switch (SW1) is broken Replace...

  • Page 123: Complete Wiring Diagram (Cord)

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Cord) Complete Wiring Diagram (Cord) RIGHT.2 Right op. pres. sensor supply + RIGHT.1 Right op. pres. sensor supply - MAIN MACHINE CONTROLLER (EB1) RH OPERATOR’S USER INTERFACE Power button output J201.8 Power button output PRESENCE SENSOR (S1)

  • Page 124: Specifications

    Service Manual – SC401, SCRUBTEC 344 24 - Electrical System (Cord) Specifications Description / Model SC401 / SCRUBTEC 344 Total power draw (EN 60335-2-72) 1.0 kW IP protection class Protection class (electric) Power supply 230 V - 50/60 Hz...

  • Page 125: 30 - Solution System

    Service Manual – SC401, SCRUBTEC 344 30 - Solution System Functional Description The solution system supplies water and detergent to the brush when cleaning the floor. The water tank is also the main machine body There is a manual valve on the right side of the tank to close the water supply whenever maintenance must be performed on the machine.

  • Page 126: Adjusting Of Detergent Concentration In The Washing Water

    Service Manual – SC401, SCRUBTEC 344 30 - Solution System Adjusting of Detergent Concentration in the Washing Water The system for mixing the detergent in the washing water is automatically activated when the brush is running The percentage of detergent added to the washing water is set to 0,25%, to change the setting perform press the Solution button for more than two seconds to perform the adjustment The set percentage depends on the relevant LED turned on, on the battery symbol...

  • Page 127: Wiring Diagram

    Service Manual – SC401, SCRUBTEC 344 30 - Solution System Wiring Diagram SOLENOID VALVE (EV1) B+ 24V (POWER) Solution valve output + AUX1.1 Solution valve output - AUX1.2 MAIN MACHINE CONTROLLER (EB1) DETERGENT PUMP (M3) Detergent pump output + AUX2.1 Detergent pump output - AUX2.2 Figure 2:...

  • Page 128: Component Locations

    Service Manual – SC401, SCRUBTEC 344 30 - Solution System Component Locations Water removable filler Solution drain and level check hose hose Garden plug Water tank front filler Water tank Figure 3: Closing cap Bottle for detergent Peristaltic detergent system pump (M3) Figure 4:...
  • Page 129 Service Manual – SC401, SCRUBTEC 344 30 - Solution System Component Locations (continues) Battery compartment liquid drain hole Figure 5: Solenoid valve (EV1) Solution tap Solution filter Figure 6:...

  • Page 130: Maintenance And Adjustments

    Service Manual – SC401, SCRUBTEC 344 30 - Solution System Maintenance and Adjustments Cleaning the Water Tank and Filter Drive the machine on a level floor. If equipped remove the ignition key, then disconnect the red battery connector Drain the water tank with the level hose Then, rinse the tank with clean water Close the detergent solution tap (A) The tap (A) is closed when it is in position (B) Remove the transparent cover (C) and the gasket (D), then remove the filter strainer (E).

  • Page 131: Detergent Tank And Detergent System Cleaning

    Service Manual – SC401, SCRUBTEC 344 30 - Solution System Detergent Tank and Detergent System Cleaning Drive the machine to the appointed disposal area If equipped remove the ignition key, then disconnect the red battery connector Lift the recovery tank cover and check that the recovery tank is empty; if not, empty it using the drain hose Close the recovery tank cover, then lift the recovery tank Unscrew the cap (A) from the detergent bottle (B)

  • Page 132: Troubleshooting

    Service Manual – SC401, SCRUBTEC 344 30 - Solution System Troubleshooting Trouble Possible Causes Remedy Small amount of solution or no The solution filter is clogged/dirty Clean the filter solution reaches the brush Solution supply valve locked in (semi) closed Replace the valve position Solenoid valve (EV1) broken or electrical...

  • Page 133: Removal And Installation

    Service Manual – SC401, SCRUBTEC 344 30 - Solution System Removal and Installation Solenoid Valve Remove Drive the machine on a level floor or on a hoisting system to facilitate the disassembly procedures. If equipped remove the ignition key, then disconnect the red battery connector Close the detergent solution tap Unscrew and disconnect the connection (A) on the solenoid valve (B) Disconnect the detergent supply hose (C) and (D) from the solenoid valve...
  • Page 134 Service Manual – SC401, SCRUBTEC 344 30 - Solution System Detergent Pump Remove Drive the machine on a level floor. If equipped remove the ignition key, then disconnect the red battery connector Lift the recovery tank Remove the Detergente bottle Unsrew the 2 screws (A) al lift the support (B) For remove only the head of the detergent pump: a Disconnect the tank hose (C) and brush hose (D)

  • Page 135: Specifications

    Service Manual – SC401, SCRUBTEC 344 30 - Solution System Specifications Description / Model SC401, SCRUBTEC 344 / BATTERY Solution tank capacity 12 US gal (45 liters) Solution flow values 0,08 - 0,18 - 0,53 gpm (0,3 / 0,7 / 2,0 L/m) Voltage 24 V Current (DC)

  • Page 136: 34 - Scrub System, Disc

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Functional Description The disc brush system can be started by the Brush Engage and Release System operator To easily and successfully engage and disengage the The disc brush turn counter-clockwise brush from the deck hub, there is a Main machine controller control system which adjusts the brush The rotating brush system cleans the surface of the...

  • Page 137: Brush Motor Antisplashing System

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Brush Motor ANTISPLASHING System To prevent the brush from splashing water outside the work path, in case of particularly smooth floors, the machine is equipped with an automatic brush motor system to reduce the power voltage in case of reduced absorption This system prevents the brush from reaching an excessive rotation speed, and additionally reduced energy consumption of smooth floors.

  • Page 138: Wiring Diagram

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Wiring Diagram MAIN MACHINE CONTROLLER RELAY (ES1) B+ 24V (POWER) BRUSH MOTOR (M1) Brush output + OUT1+ BRUSH MOTOR FUSE (F1) Brush output - OUT1- (CLICK OFF) Figure 1:...

  • Page 139: Component Locations

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Component Locations Deck raising levers Machine straight Brush motor (M1) forward movement adjusting knob Disc brush deck Brush deck support Brush Figure 2: Drive hub Figure 3:...

  • Page 140: Maintenance And Adjustments

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Maintenance and Adjustments Brush or Pad-Holder Installation Removal According to the kind of cleaning to be performed, the machine can be equipped either with the brush Press the main button (LED off) (A) or the pad-holder (B) with pad (C) together with the appropriate deck...

  • Page 141: Brush Motor Cleaning

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Brush Motor Cleaning Drive the machine on a level floor or on a hoisting system to facilitate the procedures. If equipped remove the ignition key, then disconnect the red battery connector Under the machine, check and clean the brush motor (A) by using compressed air nozzle (B) from the dirt/dust that could compromise its correct function (overheating, overvoltage ect ) Figure 5:...

  • Page 142: Troubleshooting

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Troubleshooting Trouble Possible Causes Remedy The brush does not clean The brush is excessively worn Replace properly The brush does not turn See the Control System chapter, “General system alarms”...

  • Page 143: Brush Motor Current Draw Test

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Brush Motor Current Draw Test WARNING: This procedure must be performed by qualified personnel only. Drive the machine on a level floor. Remove the brush Lift down the brush deck with the lever (If equipped) Turn the ignition key to “I”...

  • Page 144: Removal And Installation

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Removal and Installation Brush Deck Removal Drive the machine on a level floor or on a hoisting system to facilitate the disassembly procedures. Remove the brush Switch off the machine and disconnect the battery connector Lower the brush deck by pressing the pedal Under the machine, disconnect the detergent supply hose (A) from the detergent filter (B).
  • Page 145 Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Brush Deck (continues) Pay attention to disconnect the detergent hose (H) (see “detergent pump” paragraph) Remove the tie cable to release the motor harness 10 Unscrew the 2 retaining nuts (I), (J) and disconnect the brush motor power supply cables 11 Extract the brush deck (K) from beneath the solution tank Figure 8: Installation...

  • Page 146: Brush Motor Carbon Brushes Checking/Replacing

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Brush Motor Carbon Brushes Checking/Replacing Check Remove the brush deck Remove any dust and dirt from around the brush motor carbon brushes Remove the four protective covers (A) (Figure 11) by disconnecting the clips Remove the carbon brush nuts (B) with the lead-in wires Disengage the tabs (C) and remove the carbon brushes (D) Check the carbon brushes (D) for wear The carbon brushes are worn out when:...

  • Page 147: Brush Motor Disassembly/Assembly

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Brush Motor Disassembly/Assembly Disassembly Assembly Remove the brush deck Assemble the components in the reverse order of disassembly Working at the bench, remove the screw (A) and recover its washers Note: Use the rubber hammer for mounting the brush hub (C).

  • Page 148: Starting Capacitor Replacing (Cord Model)

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Starting Capacitor Replacing (Cord Model) Removal Ensure that the machine is turned off and the power supply cable plug is disconnected from the electrical mains Lower the brush deck by pressing the pedal Unscrew the 4 screws (A) and remove the cover (B) Unscrew the screw (C) for disengage the brown wire (D) Unscrew the screw (E) for disengage the blue wire (F)

  • Page 149: Capacitor Run Replacing (Cord Model)

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Capacitor Run Replacing (Cord Model) Removal Ensure that the machine is turned off and the power supply cable plug is disconnected from the electrical mains Lower the brush deck by pressing the pedal Unscrew the 4 screws (A) and remove the cover (B) Unscrew the screw (C) for disengage the brown wire (D) Unscrew the screw (E) for disengage the blue wire (F)

  • Page 150: Specifications

    Service Manual – SC401, SCRUBTEC 344 34 - Scrub System, Disc Specifications Description / Model SC401, SCRUBTEC 344 / BATTERY Cleaning width 17 in (430 mm) Brush/pad diameter 17 in (430 mm) Brush pressure 55 lb (25 kg) Brush deck right/left offset 65 / 15 mm (2.5 / 0.6 in) Brush distance from the floor (when lifted) 1.6 in (40 mm)

  • Page 151: 38 - Squeegee System

    Service Manual – SC401, SCRUBTEC 344 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 castors and the weight of the system presses it down on the floor. The squeegee is attached with two quick-fastening handwheels which fit in the slots of the squeegee support.

  • Page 152: Component Locations

    Service Manual – SC401, SCRUBTEC 344 38 - Squeegee System Component Locations Spring Squeegee lifting/ lowering pedal Upper squeegee support Impact deflection wheel Squeegee adjusting knob Lower squeegee support Mounting Squeegee blades handwheels Figure 1:...

  • Page 153: Maintenance And Adjustments

    Service Manual – SC401, SCRUBTEC 344 38 - Squeegee System Maintenance and Adjustments Squeegee Cleaning Note: The squeegee must be clean and its blades must be in good conditions in order to get a good drying. WARNING: It is advisable to wear protective gloves when cleaning the squeegee because there may be sharp debris.

  • Page 154: Checking/Replacing The Squeegee Blades

    Service Manual – SC401, SCRUBTEC 344 38 - Squeegee System Checking/Replacing the Squeegee Blades Note: The squeegee must be clean and its blades must be in good conditions in order to get a good drying. WARNING: It is advisable to wear protective gloves when cleaning the squeegee because there may be sharp debris.

  • Page 155: Troubleshooting

    Service Manual – SC401, SCRUBTEC 344 38 - Squeegee System Troubleshooting Trouble Possible Causes Remedy Suction of dirty water is Squeegee or vacuum hose blocked or Clean or repair/replace insufficient or non-existent damaged The squeegee leaves lining on There is debris under the blade Remove the floor or does not collect water Squeegee blade lips damaged or worn...

  • Page 156: Removal And Installation

    Service Manual – SC401, SCRUBTEC 344 38 - Squeegee System Removal and Installation Spring on the Squeegee Support Removal Drive the machine on a level floor or on a hoisting system to facilitate the disassembly procedures. Remove the squeege from the squeegee support (A), then lower the squeegee support by slowly to the floor.

  • Page 157: Specifications

    Service Manual – SC401, SCRUBTEC 344 38 - Squeegee System Specifications Description / Model SC401, SCRUBTEC 344 Squeegee width 28.3 in (720 mm)

  • Page 158: 40 - Recovery System

    Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Functional Description The recovery system removes the dirty water from the floor and pipes it to a recovery tank. When the machine is running, the dirty water on the floor is collected by the squeegee blades and collected through the slots in the same, piped through the vacuum hose and into the tank by the airflow created by vacuum motor (M2).

  • Page 159: Wiring Diagram

    Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Wiring Diagram MAIN MACHINE CONTROLLER RELAY (ES1) B+ 24V (POWER) VACUUM MOTOR (M2) Vacuum output + OUT2+ VACUUM MOTOR FUSE (F2) Vacuum output - OUT2- Figure 1:...

  • Page 160: Component Locations

    Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Component Locations Cover gasket Recovery tank cover Container with debris collection grid Recovery tank Vacuum grid with automatic shut-off float Figure 2: Squeegee vacuum Vacuum motor (M2) hose Recovery water drain Motor protection case hose Figure 3:...

  • Page 161: Maintenance And Adjustments

    Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Maintenance and Adjustments Recovery Tank Cleaning Drive the machine to the appointed disposal area Ensure that the machine is off and the ignition key has been removed (if equipped) Drain the water in the tank through the hose Raise the recovery tank cover Wash the inside of the recovery tank and the cover with clean water Clean the vacuum grid (B), release the fasteners (A), open the grid (B) and recover the float (C) then...

  • Page 162: Troubleshooting

    Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Troubleshooting Trouble Possible Causes Remedy The vacuum motor will not turn Wiring between Main machine controller (EB1) Repair and vacuum motor (M2) damaged Main control board (EB3) faulty Replace Vacuum motor fuse (F2) faulty Replace Vacuum motor (M2) faulty Check the amperage...

  • Page 163: Vacuum Motor Current Draw Test

    Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Vacuum Motor Current Draw Test WARNING: This procedure must be performed by qualified personnel only. Disconnect the vacuum hose to the squeegee Remove the vacuum grid with the float, after the test reinstall it. If present, drain the recovery tank, then lift it Apply the amp clamp (A) on the positive cable (grey) of the vacuum harness (B) (If equipped) Turn the ignition key to “I”...

  • Page 164: Removal And Installation

    Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Removal and Installation Vacuum Motor Unit Removal Switch off the machine and disconnect the battery connector If present, drain the recovery tank, then lift it Disconnect the connector (A) Unscrew the 5 screws (B) and the tie cable (C), then remove the Vacuum motor unit (D) from the machine Figure 6:...

  • Page 165: Container And Vacuum Motor Disassembly/Assembly

    Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Container and Vacuum Motor Disassembly/Assembly Disassembly Disassemble the vacuum system motor unit as shown in the previous paragraph At the workbench, remove the terminals lock (A) from the connector (B) With a little screwdriver (C) move the splane lock (D) for disengaging the terminals from the connector Remove the two terminals (E) Carefully, slightly lift the splane lock (D), previously pressed, to restore it...
  • Page 166 Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Container and Vacuum Motor Disassembly/Assembly (continues) Remove the external soundproofing support (E) from the internal soundproofing case (F). Remove the ferrite (G) from the wire Unscrew the 4 screw (H) Figure 8: Lift the outer container (I) out of the inner container (J), then extract the motor (K) Figure 9:...
  • Page 167 Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Container and Vacuum Motor Disassembly/Assembly (continues) 10 Save the gaskets (L) and (M) Figure 10: 11 Remove the save the clamp (N) and the dividing sponge (O), then disconnect the connections (P) Figure 11: 12 Clean the inside of the containers to remove any dirt which has accumulated, and check all gaskets for wear;...
  • Page 168 Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Container and Vacuum Motor Disassembly/Assembly (continues) Assembly 13 Position the gasket (Q) on the vacuum system motor Check that the gasket is reassembled with the correct orientation (slots) 14 Install the clamp (R) The clamp must be positioned at 2 2 in (55 mm) from the upper surface, around the entire circumference 2.2 in (55 mm) Figure 12:...
  • Page 169 Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Container and Vacuum Motor Disassembly/Assembly (continues) 18 Run the wiring (X) inside the hole in the outer container (I) 19 Insert the vacuum system motor in the outer container, as shown (Y) Figure 14: 20 Rotate the outer container with the vacuum system motor Check that the motor and gasket are positioned almost in line with the outer edge of the container...

  • Page 170: Specifications

    Service Manual – SC401, SCRUBTEC 344 40 - Recovery System Specifications Description / Model SC401, SCRUBTEC 344 / BATTERY Recovery tank capacity 7,9 US gal (30 liters) Vacuum motor technical data 0,4 hp (280 W) Vacuum circuit capacity O (900 mm H 35,4 in H...

  • Page 171: 90 - Options

    Service Manual – SC401, SCRUBTEC 344 90 - Options Description Illustration KEY KIT (EU model only) • Switch ignition starter with cap • Harness DETERGENT KIT (EU model only) • Detergent Bottle • Insert-dry brake • Cap • Refill cap •...
  • Page 172 Service Manual – SC401, SCRUBTEC 344 90 - Options Description Illustration BATTERY CHARGER KIT (EU model only) • Charger extention UK / EU • Cable tie plug • Charger battery • Support battery charger • Hardware COUNTER HOUR 24V KIT (All version) The hour counter displays the machine operating hours, calculated...
  • Page 173 Service Manual – SC401, SCRUBTEC 344 90 - Options Description Illustration USB PORT KIT (All version) The USB socket enables to recharge an external device when the machine is turned on • USB port • Harness USB • Clamp cable black...

This manual is also suitable for:

Sc401 seriesScrubtec 344 b combiSc401 17 bdSc401 43 b full pkgSc401 43 bSc401 43 e ... Show all

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