Nilfisk-Advance Advance SC1500 Service Manual
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Nilfisk-Advance Advance SC1500 Service Manual

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SC1500
Service Manual
Advance SC1500 Models: 56104000 (X20D), 56104001 (X20R)
Nilfisk SC1500 Models: 56104002 (SC1500-51D)
English
5/2013 Revised 11/2017, Form No. 56043166

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Summary of Contents for Nilfisk-Advance Advance SC1500

  • Page 1 SC1500 Service Manual Advance SC1500 Models: 56104000 (X20D), 56104001 (X20R) Nilfisk SC1500 Models: 56104002 (SC1500-51D) English 5/2013 Revised 11/2017, Form No. 56043166...

  • Page 2: Table Of Contents

    Service Manual – SC1500 Contents General Information Machine Configurations Service Manual Purpose and Application Revision History Other Reference Manuals and Information Sources Diagnostic and Service Tools Conventions Parts and Service Modifications Nameplate Cautions and Warning Symbols General Safety Instructions Prop Rod Moving the Machine Transporting the Machine Specifications...
  • Page 3 Service Manual – SC1500 Contents Programming Options Main Menu Access Submenu Functions Deck Type Low Battery Voltage Cutout Battery Charger Burst Of Power Operation Detergent (EcoFlex ) Option ™ Chemical Rate Bias Open Fault Detect Display Rev Level Lock Out Brush Pressure Lock Out Solution Flow Rate Backup Alarm Volume Forward Alarm Volume...
  • Page 4 Service Manual – SC1500 Contents Specifications Special Tools Scrub System Functional Description Scrub Deck and Motor 20D Scrub Deck 20R REV Deck ™ Brush Motor Contactor Deck Actuator Assembly Circuit Descriptions Scrub Brush Motor Scrub Brush Motor Off Scrub Brush Motor On Deck Actuator Assembly Scrub Deck Up Scrub Deck in Vacuum-only Position...
  • Page 5 Service Manual – SC1500 Contents Wheel System - Traction Functional Description Wheel Drive Motor Circuit Descriptions Power to the E1 Curtis 1210 Speed Controller Speed Control Drive Functions Speed Control Communication with the A1 Control Board Component Locations Maintenance and Adjustments Speed Control Programming Options Troubleshooting General Troubleshooting...

  • Page 6: General Information

    Service Manual Purpose and Application This Service Manual is a technical resource designed to aid service personnel in maintaining and repairing the Advance SC1500 Scrubbers to ensure optimum performance and long service life. Please read it thoroughly before servicing your machine.

  • Page 7: Diagnostic And Service Tools

    Modifications and additions to the cleaning machine which affect capacity and safe operation shall not be performed by the customer or user without prior written approval from Nilfisk-Advance Inc. Unapproved modifications will void the machine warranty and make the customer liable for any resulting accidents.

  • Page 8: Cautions And Warning Symbols

    General Information Cautions and Warning Symbols Nilfisk-Advance uses the symbols below to signal potentially dangerous conditions. Read this information carefully and take the necessary steps to protect personnel and property. Danger! Is used to warn of immediate hazards that will cause severe personal injury or death.
  • Page 9 Service Manual – SC1500 General Information Caution! Be sure to follow these safety precautions to avoid situations that could cause personal injury, damage to property or equipment damage. • This machine is not approved for use on public paths or roads. •...

  • Page 10: Prop Rod

    Service Manual – SC1500 General Information Prop Rod To prevent the Control Panel Housing / Recovery from dropping unexpectedly and Tank Cover causing injury, always engage the Prop Rod shown before working under the Control Panel Panel Housing Housing/ / Recovery Tank Cover Recovery Tank Cover Prop Rod...

  • Page 11: Transporting The Machine

    Service Manual – SC1500 General Information Transporting the Machine Caution! Before transporting the machine on an open truck or trailer, make sure: • All tanks are empty. • The recovery tank cover is latched securely. • The machine is tied down securely. (Refer to the Tie-down Locations below. • The machine’s electromagnetic brake is engaged (not manually overridden). Right Left Tie-down Tie-down Front Specifications Tie-down General Specifications Model SC1500-X20D SC1500-X20R Model No.

  • Page 12: Overall Dimensions

    Service Manual – SC1500 General Information Overall Dimensions 1.13 1.13” [28,7] [28,7 mm] 52.5” 52.5 [1332] [133,4 cm] 48.5” [123,2 cm] 48.5 24.5” [62,2 cm] [1232] 24.5 [623] 27.9” [70,9 cm] 27.9 [710] Fastener Torque Specifications Size Plated Steel Stainless Steel 42 in.-lb.

  • Page 13: Maintenance

    Service Manual – SC1500 General Information Maintenance General Maintenance Information Keep the machine in top condition by closely following the maintenance schedule. Maintenance intervals given are for average operating conditions. Machines used in severe environments may require service more often. Caution! Do not pressure-wash the machine Maintenance Schedule...

  • Page 14: Lubrication Locations

    Service Manual – SC1500 General Information Lubrication Locations • Once a month apply Lubriplate® 730-2 or equivalent grease to, or grease the fitting on, the following components. Avoid using too much grease. • Hex Shaft/Steering Tube Assembly • Drive Wheel Chain •...

  • Page 15: Major Machine Components

    Service Manual – SC1500 General Information Major Machine Components Control System Electrical System Recovery System Solution System Chassis System Squeegee Assembly Scrub System - REV Scrub System - 20D...

  • Page 16: Machine Controls

    Service Manual – SC1500 General Information Machine Controls Key Switch, Emergency Stop and Horn Switch • – controls the battery power to the machine. Key Switch Note that you must turn the to the on ( Key Switch position before stepping onto the machine platform. Switch •...

  • Page 17: Circuit Breakers

    Service Manual – SC1500 General Information Circuit Breakers are mounted on the top of the control panel. To reset a , press the Circuit Breakers Circuit Breaker corresponding reset button • – labeled in the 50-amp Circuit Breaker Ladder Diagram; controls the positive voltage to the E1 Curtis 1210 Speed Controller.

  • Page 18: Speed And Direction Controls And Indicators

    Service Manual – SC1500 General Information Speed and Direction Controls and Indicators • The – labeled in the Ladder Diagram; Speed Adjustment Knob 100K potentiometer that controls the machine speed in both forward and reverse. Speed Adjustment Knob R1 • The select the direction the machine will move when the Go Pedal is Forward Reverse Drive Switches...

  • Page 19: Scrub Controls And Indicators

    Service Manual – SC1500 General Information Scrub Controls and Indicators Note: The scrub pressure, recovery vacuum power, solution flow rate and detergent strength settings that will be in effect when the One-touch Scrub On/Off Switch is pressed is ™ determined by the Save Scrub Settings submenu in the Programming Options. is selected, the machine will use the scrub settings that • If SAVE SCRUB SETTINGS/YES were in use when the key switch was switched off.

  • Page 20: Detergent System Controls And Indicators

    Service Manual – SC1500 General Information Detergent System Controls and Indicators • – functions as follows: Detergent Strength Switch • When the scrub system is enabled, pressing Detergent Indicator will cycle the Detergent Strength Switch Bar Graph detergent flow rate from weak (bottom box filled as shown), to strong (top and bottom boxes filled), then to off (no boxes filled).

  • Page 21: Vacuum Power Adjustment Switch And Indicators

    Service Manual – SC1500 General Information The Burst of Power mode lasts for a maximum duration of 60 seconds but can be terminated early by pressing the Information Switch, , Scrub On/Off Switch, Detergent Strength Switch, Burst of Power Switch Solution Flow Adjustment Switch, Extra Pressure Switch or the Vacuum Power Adjustment Switch.

  • Page 22: Information Switch

    Service Manual – SC1500 General Information • – displays the vacuum motor power mode as follows: Vacuum Level Bar Graph • Bottom box filled – low/quiet mode (as shown). • Top and bottom boxes filled – high/standard mode. • Both boxes empty – vacuum motor off. Information Switch •...

  • Page 23: Chassis System

    Service Manual – SC1500 Chassis System Major Chassis Components The Chassis System provides the framework on which the machine components are mounted. Battery Tray contains the batteries Platform and connectors and is Assembly mounted to the top of Chassis Weldment Battery Tray Platform Assembly...

  • Page 24: Platform Switches

    Service Manual – SC1500 Chassis System Platform Switches are mounted on the top of the Operator Presence Pedal Go Pedal Platform • When the Operator stands on the he/she presses the which actuates the Platform, Operator Presence Pedal (called the “Deadman Switch S2” in the Diagram).

  • Page 25: Control System

    Service Manual – SC1500 Control System Functional Description The Control System consists of the A1 Control Board (Main Machine Controller) and the E1 Curtis 1210 Speed Controller. The A1 Control Board controls the scrubbing and wastewater recovery functions based on Operator requests, and motion and direction inputs from the E1 Curtis 1210 Speed Controller.

  • Page 26: Troubleshooting

    Service Manual – SC1500 Control System Troubleshooting Fault Codes The graphic display will show any error codes detected by the A1 Control Board on the Information Screen as they occur. The display will show the wrench icon and the two-digit fault code number. The example shown here, is a speed control fault.

  • Page 27: System Disabled By Fault Codes

    Service Manual – SC1500 Control System Display Fault Description Conditions Needed to Set the Fault Code Code The measured current was greater than or equal to the minimum threshold value while the deck was moving, but the Scrub Deck Actuator position fault software timed out looking for the new position (never saw the actuator switch states read the target values).

  • Page 28: Service Test Mode

    Service Manual – SC1500 Control System Disable System Flash Indicator Fault Description Scrub Deck Actuator position fault Solution Solenoid stuck closed Brush Contactor (K2) coil stuck closed Vacuum Contactor (SSR1) coil stuck closed Detergent Pump stuck closed On-board Battery charger fault Service Test Mode The Service Test Mode allows you to switch the individual electrical system components on and off independent of the normal Operator inputs.

  • Page 29: Service Test Mode Functions

    Service Manual – SC1500 Control System Service Test Mode Functions The control panel switches are used to control various A1 Control Board output functions. The table below lists the control panel switches, and their corresponding Service Test Mode functions and displays: Control Panel Switch Service Test Mode Function Graphic Display Descriptions...
  • Page 30 Service Manual – SC1500 Control System Control Panel Switch Service Test Mode Function Graphic Display Descriptions Scrub Pressing the Scrub On/Off Switch toggles the SPD: R 26.5 BRU: OFF REV: ON VAC: OFF On/Off brush motor contactor and scrub deck motor INH: ON SOL: OFF Switch...

  • Page 31: Programming Options

    Service Manual – SC1500 Control System Programming Options The SC1500 graphic display has two “layers” of hidden menus that allow you to view and change the various programmable machine configurations, system settings and parameters. The top “layer” is the main menu from which you can navigate to the 20 submenus.

  • Page 32: Submenu Functions

    Service Manual – SC1500 Control System Submenu Functions Deck Type The SC1500 can be equipped with two different deck options. The 1. DECK PROGRAM OPTIONS submenus allow you to specify the type of deck installed in your TYPE 1. DECK TYPE machine.

  • Page 33: Battery Charger

    Service Manual – SC1500 Control System Battery Charger The current battery chargers do not communicate with the A1 control PROGRAM OPTIONS boad. So this menu function is not applicable. However, for older model 3. BATTERY CHARGER chargers this submenu allows you to specify the battery type in your machine so the on-board charger will use the charging algorithm that is compatible with the battery type.

  • Page 34: Detergent (Ecoflex ™ ) Option

    Service Manual – SC1500 Control System Detergent (EcoFlex ™ ) Option submenus allow you to enable or disable the 5. ECOFLEX INSTALLED PROGRAM OPTIONS detergent system. 5. ECOFLEX INSTALLED • If the menu setting is , the controller will expect a Detergent Pump to be installed.

  • Page 35: Lock Out Brush Pressure

    Service Manual – SC1500 Control System Lock Out Brush Pressure submenus allow you to lock out the low or high 9. LOCKOUT BRUSH PROGRAM OPTIONS scrub pressure settings. The Operator will not be able to select a scrub 9. LOCKOUT BRUSH pressure setting that is locked out.

  • Page 36: Backup Alarm Volume

    Service Manual – SC1500 Control System Backup Alarm Volume PROGRAM OPTIONS 11. BACKUP ALARM VOL (volume) submenus allow you to set the 11. BACKUP ALARM VOL backup alarm volume. The default setting is MEDIUM PROGRAM OPTIONS BACKUP ALARM VOL PROGRAM OPTIONS BACKUP ALARM VOL PROGRAM OPTIONS BACKUP ALARM VOL...

  • Page 37: Restore Defaults

    Service Manual – SC1500 Control System Restore Defaults submenus allow you to reset the programmed 14. RESTORE DEFAULTS PROGRAM OPTIONS options/parameters stored in the A1 Control Board EEPROM to their 14. RESTORE DEFAULTS factory default values. Note that selecting will RESTORE DEFAULTS / YES not reset the hour meter.

  • Page 38: Extra Information On The Graphic Display

    Service Manual – SC1500 Control System Extra Information on the Graphic Display submenus allow you to display additional 17. EXTRA INFO ON LCD PROGRAM OPTIONS information on the graphic display. This additional information is 17. EXTRA INFO ON LCD displayed in real time on both the Scrubbing and Information screens and can aid in troubleshooting the machine in normal operation.

  • Page 39: Frozen Parameters

    Service Manual – SC1500 Control System Frozen Parameters first and second-level submenus allow you 18. FROZEN PARAMETER PROGRAM OPTIONS to view the machine parameters that were saved prior to when an error 18. FROZEN PARAMETER code was detected. This can be helpful when troubleshooting intermittent problems that are causing a code to set.
  • Page 40 Service Manual – SC1500 Control System To display the parameter data points in a second-level submenu: Press the Forward (up) or Reverse (down) Drive Switch to scroll PROGRAM OPTIONS through the available first-level submenus. (The first-level submenu FROZEN PARAMETER 3. BATT VOLTAGE is selected in this example.) 3.

  • Page 41: Panel Test

    Service Manual – SC1500 Control System Panel Test PROGRAM OPTIONS submenus allow you to verify the function of the control 19. PANEL TEST 19. PANEL TEST panel membrane switches and LEDs, This will help identify any intermittent or non-functioning switches or LEDs. When the submenu is first entered, all LED will turn off When you press a membrane switch, the display will show the name of PROGRAM OPTIONS...

  • Page 42: Removal And Installation

    Service Manual – SC1500 Control System Removal and Installation A1 Control Board Caution! Electronic devices like the A1 Control Board are sensitive to Electrostatic Discharge (ESD). Before handling the Control Board, touch a metal bench or shelf to discharge any electrical charge that may have built up in your body. Do not walk around with a Control Board in your hands.

  • Page 43: E1 Curtis 1210 Speed Controller

    Service Manual – SC1500 Control System Carefully disconnect the Electrical from the Connectors A1 Control Board Remove the and grounding Phillips Screws strap, then remove the A1 Control Board from the Interface Panel Assembly Reinstall the by following A1 Control Board Electrical the above steps in reverse order.
  • Page 44 Service Manual – SC1500 Control System Carefully lift the Interface out of the Panel Assembly Control Panel Control Interface Panel Panel Assembly Carefully disconnect the from Electrical Connectors E1 Curtis 1210 Speed Controller Remove the two Electrical Socket Connector and remove (typical) Head Screws E1 Curtis 1210 Speed...

  • Page 45: A1 Control Board Shop Measurements

    Service Manual – SC1500 Control System A1 Control Board Shop Measurements The following table lists measurements taken from one SC1500. While these are not “specifications”, they can help you recognize abnormal vs. normal conditions. Note that the black voltmeter lead is on B- unless otherwise indicated. Color Description Ref.
  • Page 46 Service Manual – SC1500 Control System Color Description Ref. Measurements J3-7 ORN/BLU Status 1.77v when no code Unstable when code – max 23.5v J3-8 24.4v key off or on J3-9 GRN/BLK Horn - 14.9v horn off 0.004v horn on J3-10 ORN/RED Horn + 14.9v horn off or on...

  • Page 47: Electrical System

    Service Manual – Advance SC1500 Electrical System Functional Description Overview The electrical system consists of the switches, circuit breakers and contactors mounted on and underneath the control panel assembly, the 150-amp main fuse, on-board battery charger (if so equipped) and the batteries.

  • Page 48: Interlock Circuit

    Electrical System Service Manual – SC1500 Interlock Circuit The battery charger has an “interlock circuit” which consists of an internal relay that interrupts the “Deadman” signal to the main control board, and the Keyswitch Input (KSI) signal to the drive speed controller when the charger is plugged into an AC power outlet.

  • Page 49: S.p.e. Charging Profiles And Charging Progress

    Electrical System Service Manual – SC1500 Battery 24 VDC Fuse, 150 A. Internal Relay in Battery Charger 1 2 3 Not Used YEL/ORN Emergency Stop Dead Man Switch Not Used SPST Key Circuit Breaker, 5 Amp Switch Dead Man Switch J3-4 Control Board Main Machine Controller...

  • Page 50: Delta-Q Charging Profiles And Charging Progress

    Electrical System Service Manual – SC1500 Delta-Q Charging Profiles and Charging Progress The Delta-Q battery charger does not communicate with the main machine controller. It is a “stand-alone” unit. Models that have the Delta-Q charger have a separate LED to communicate charging progress. By pressing a button on the charger you can see what charging profile is in use.
  • Page 51 Electrical System Service Manual – SC1500 Use Profile Battery Manufacturer Volts Battery Model # 20 Hour N-A P/N Rating US BATTERY US-125 56206079 P-0-1-1 US BATTERY US-125 40136A P-0-1-1 US BATTERY US-125 40136B P-0-1-1 US BATTERY US-14 5XC 56317154 P-0-7-2 US BATTERY US1800 56206117...

  • Page 52: Component Locations

    Electrical System Service Manual – SC1500 Component Locations The following electrical components are included in this section: • Batteries • Optional On-board battery charger • Switches • Circuit Breakers • Contactors/Relays • 150-amp Fuse sit in the Batteries . To access Battery Tray Recovery , lift up the...
  • Page 53 Electrical System Service Manual – SC1500 25-amp Circuit Breaker (CB4), 20-amp Circuit 25-amp 20-amp 5-amp 50-amp (CB3), Breaker Circuit Circuit Circuit Circuit 5-amp Circuit Breaker Breaker Breaker Breaker (CB2) and Breaker 50-amp (CB1), Circuit Breaker 100k Speed Control Potentiometer (R1), Emergency Disconnect (S1) are all Key Switch...

  • Page 54: Troubleshooting

    Electrical System Service Manual – SC1500 Troubleshooting Note: Refer to the individual machine system sections for electrical troubleshooting procedures. Problem Cause Correction No power to the Discharged batteries. Check the battery voltage and charge as necessary. machine. Poor battery connection(s). Check the battery cables, terminals and connections and tighten/repair/replace as necessary.

  • Page 55: Wiring Diagrams

    Electrical System Service Manual – SC1500 Wiring Diagrams Wiring (Ladder) Diagram Drawing 56104446, Rev C Note: Machine models with a Serial Number below 3510143206293 are functionally the same, but have the keyswitch connection upstream from the optional battery charger, instead of downstream as shown. FUSE, 150A.
  • Page 56 Electrical System Service Manual – SC1500 Wiring (Ladder) Diagram, continued MOTOR, BRUSH LIFT ACTUACTOR YEL/ORN J2-3 BAT CHARGER ON BOARD COMMUNICATION BRUSH ACT (-) J1-9 TOP LIMIT A1(CONTROL BOARD) MAIN MACHINE CONTROLLER YEL/BLK B- J1-8 POS 1 RED/VIO ACT POSITION1 J2-12 POS 2 BLK/WHT ACT POSITION2 J2-11...

  • Page 57: Wiring Harness Diagram (Current)

    Electrical System Service Manual – SC1500 Wiring Harness Diagram (Current) Drawing 56104447, Rev B (for machines with Serial Numbers above 3510143206293)

  • Page 58: Wiring Harness Diagram (Legacy)

    Electrical System Service Manual – SC1500 Wiring Harness Diagram (Legacy) Drawing 56104082, Rev C (for machines with Serial Numbers below 3510143206293)

  • Page 59: Electrical Connector Pin-Out Assignments

    Electrical System Service Manual – SC1500 Electrical Connector Pin-out Assignments The following tables list the individual connector pin-out assignments. The tables include connector illustrations to help you identify the various connectors on the machine. The connector pin-out information is organized by connector ID in alphabetical order. To Locate and Identify a Connector For example, if you need to find out which connector is on the (solution)

  • Page 60: Connector Pin-Out Assignment Tables

    Electrical System Service Manual – SC1500 Connector Pin-out Assignment Tables J1 (Molex Mini Fit Jr. 39012105) Pin# Conductor Wire Color W279 RED/YEL – – W280 BLU/GRA – – – – W302 RED/YEL YEL/BLK W165 W054 W055 ORN/BLK J2 (Molex Mini Fit Jr. 39012125) Pin# Conductor Wire Color...
  • Page 61 Electrical System Service Manual – SC1500 J3 (Molex Mini Fit Jr. 39012145) Pin# Conductor Wire Color W181 BRN/VIO – – W166 RED/BRN W294 W066 BLU/BLK W277 RED/WHT W067 ORN/BLU W182 BRN/VIO W281 GRN/BLK W282 ORN/RED W283 VIO/BLK W003 GRA/BLK W010 WHT/RED W183...
  • Page 62 Electrical System Service Manual – SC1500 J4 (39012185) Pin# Conductor Wire Color – – – – W060 W272 W293 W276 RED/WHT – – – – W067 ORN/BLU – – – – W302 RED/YEL W064 W278 – – W066 BLU/BLK W166 RED/BRN W217 GRN/ORN...
  • Page 63 Electrical System Service Manual – SC1500 X6 (Delphi 12052613) Pin# Conductor Wire Color W191 W194 X7 (Delphi 12015792) Pin# Conductor Wire Color W284 W283 VIO/BLK X126 (AMP 282087-1) Pin# Conductor Wire Color W172 W173 RED-VIO W174 YEL-ORN...
  • Page 64 Electrical System Service Manual – SC1500 X127 (Delphi 15363990) Pin# Conductor Wire Color W170 W171 X139 (Delphi 12020786) Pin# Conductor Wire Color W055 ORN/BLK W054 W204 RED/VIO W165 YEL/BLK – – W218 BLK/WHT X143 (Ducon 12147067) Pin# Conductor Wire Color W273 RED/GRN W274...
  • Page 65 Electrical System Service Manual – SC1500 X144 (Delphi 12015792) Pin# Conductor Wire Color W278 W275 RED/WHT X161 (Delphi 12020926) Pin# Conductor Wire Color W272 W271 W289 WHT/BRN W293 W294...

  • Page 66: Recovery System

    Service Manual – SC1500 Recovery System Functional Description The Recovery System pulls the wastewater from the squeegee and directs it into the recovery tank. The 24-volt, three-stage electric vacuum motor creates a vacuum in the recovery tank with sufficient airflow to lift the used cleaning solution from the squeegee and into the vacuum hose assembly, which then directs the water into the recovery tank.

  • Page 67: Circuit Descriptions

    Service Manual – SC1500 Recovery System • The ) controls the Solid State Relay voltage to the . Note that Vacuum Motor has an LED that Solid State Relay Solid State lights when the is on. Relay (K1) Relay • The reduces the high- Flyback Diode (D2) voltage spike through the Solid State...

  • Page 68: Vacuum Motor On

    Service Manual – SC1500 Recovery System Vacuum Motor On Bat + Bat - Control Board SPST Key Switch Vacuum Contactor Curtis 1210 BRN/VIO GRA/BLK J3-12 Bat - Speed Controller RED/WHT J3-6 Pin 6 Brake - Bat - Motion Input (0.1v) BLU/ORN Circuit Breaker, 20 Amp Solid State...

  • Page 69: Component Locations

    Service Manual – SC1500 Recovery System Component Locations The following components are included in this section: • Recovery Tank • Vacuum Motor • Debris Cage • Float Cage Assembly • Vacuum Hose Assembly • Drain Hose • Solid State Relay (K1) •...
  • Page 70 Service Manual – SC1500 Recovery System allows you to drain the wastewater Drain Hose from the Recovery Tank. Drain Hose Solid State Relay Fly-back Diode (K1) (rectifier bridge) are (D2) located inside the control panel assembly Solid State Relay (K1) Fly-back Diode (D2) Control...

  • Page 71: Troubleshooting

    Service Manual – SC1500 Recovery System Troubleshooting General Troubleshooting Problem Cause Correction Vacuum motor not No voltage from the Key Check the wiring from the Key Switch S1 to terminal running - the LED on Switch S1 to terminal 3+ on 3+ on relay SSR1 and repair as necessary.

  • Page 72: Bench-Testing The Fly-Back Diode (Bridge Rectifier)

    Service Manual – SC1500 Recovery System Bench-testing the Fly-back Diode (bridge rectifier) Negative When functioning properly, the flyback diode should conduct only when the voltage gets reversed by the vacuum motor. To test the bridge rectifier, use a DC continuity tester or an ohm meter (on the R x 100 scale) as follows.
  • Page 73 Service Manual – SC1500 Recovery System If you replace the Fly-back , make sure the White Diode Positive Wire is in the upper left position as shown, then fasten the to the electrical Fly-back Diode panel with the Black Screw Wire Positive Tab Connect the...

  • Page 74: Removal And Installation

    Service Manual – SC1500 Recovery System Removal and Installation Vacuum Motor Drain the recovery tank. Vacuum Lift the recovery tank to access the Cover Vacuum Cover M6 Screw, Flat Washer and Remove the three Cover Plate (3) M6 Screws Flat Washers and remove the Cover Plates Vacuum Cover...

  • Page 75: Specifications

    Service Manual – SC1500 Recovery System Specifications Specifications Component Low Speed: 11 - 12 Amps Vacuum Motor Current Draw High Speed: 16 - 17 Amps Sealed 40 - 44 Inches of Water Vacuum Water Lift 1” open hole 9.5 Inches of Water Vacuum Motor Mounting Screws 3 NM (26 in lb) Special Tools...

  • Page 76: Scrub System

    Service Manual – SC1500 Scrub System Functional Description The Scrub System includes the Scrub Deck, Brush or Pad Motor, Brush Motor Contactor (K2 relay) and Deck Actuator Assembly. The Scrub System uses either disc scrub brushes or REV deck pads depending on ™...

  • Page 77: Scrub Deck And Motor

    Scrub System Service Manual – SC1500 Scrub Deck and Motor 20D Scrub Deck The 20D Scrub Decks use a Brush Motor horizontally-mounted Brush Motor with an integral gearbox to drive the and attached Brush Plate Assembly . The is fastened to Brush Brush Motor , which is bolted to the...

  • Page 78: Rev ™ Deck

    Scrub System Service Manual – SC1500 20R REV ™ Deck The 20R REV Scrub Decks use a ™ Motor vertically-mounted to drive the Motor and attached Pad Driver Assembly directly. The is fastened to the Motor and attached Motor Plate Rev Lift Plate Squeegee Link...

  • Page 79: Brush Motor Contactor

    Scrub System Service Manual – SC1500 Brush Motor Contactor controls the Brush Motor Contactor (K2) power to the Brush/Pad Motor. Brush Motor Contactor (K2) Deck Actuator Assembly uses an electric to run a lead screw Deck Actuator Assembly Motor that extends and retracts the and attached .
  • Page 80 Scrub System Service Manual – SC1500 Two internal , actuated by rotating , provide Position Switches Cams actuator position feedback to the A1 Control Board. Two internal (top and bottom), also actuated by Limit Switches rotating , switch off the actuator at the fully-retracted Cams Motor...

  • Page 81: Circuit Descriptions

    Scrub System Service Manual – SC1500 Circuit Descriptions Scrub Brush Motor Scrub Brush Motor Off Control Board Bat + Bat - Brush WHT/RED Contactor J3-13 Curtis 1210 Bat - SPST Key Speed Switch Controller Brake - RED/WHT J3-6 Pin 6 Bat - Motion Input 24v BRN/VIO...

  • Page 82: Scrub Brush Motor On

    Scrub System Service Manual – SC1500 Scrub Brush Motor On Control Board Bat + Bat - Brush Contactor WHT/RED J3-13 Curtis 1210 Bat - SPST Key Speed Switch Controller Brake - RED/WHT J3-6 Pin 6 Bat - Motion Input (0.1v) BRN/VIO Brush Brush Motor...

  • Page 83: Deck Actuator Assembly

    Scrub System Service Manual – SC1500 Deck Actuator Assembly Scrub Deck Up When the Scrub System is switched from active to not active, Deck Actuator Assembly Control Board in the Gang Switch A1 Control switches on the power to the Board Upper Brush Lift Actuator Motor M3...

  • Page 84: Scrub Deck At Normal Scrub Pressure

    Scrub System Service Manual – SC1500 Scrub Deck at Normal Scrub Pressure When the Scrub System is active, the in the Deck Actuator Assembly Gang Switch A1 Control Board Control Board switches on the power to the Brush Lift . The Deck Actuator Actuator Motor M3 lowers the scrub deck to the...

  • Page 85: Component Locations

    Scrub System Service Manual – SC1500 Component Locations The following components are included in this section: • Scrub Deck • Scrub Deck Motor • Brush Motor Contactor (K2) • Scrub Deck Actuator Assembly is suspended underneath Scrub Deck the machine and pivots up and down on a mechanical mount.
  • Page 86 Scrub System Service Manual – SC1500 controls Brush Motor Contactor (K2) the power to the scrub deck motor and is located inside the control panel assembly. Brush Motor Contactor (K2) Scrub Deck Actuator Assembly is attached to the Scrub Deck machine frame and lowers and Scrub Deck raises the...

  • Page 87: Troubleshooting

    Scrub System Service Manual – SC1500 Troubleshooting Problem Cause Correction Brush Motor not No voltage to the K2 Brush 1. Check the voltage on pin J3-13 on the A1 Control running Contactor coil Board. The signal, referenced to ground, should be 24.3v with the Brush Motor off, 0.2v with the Brush Motor on.

  • Page 88: Removal And Installation

    Scrub System Service Manual – SC1500 Removal and Installation Scrub Deck Turn the key switch on, then press the Scrub On/ Off Switch to lower the scrub deck to the normal scrub position. This will relieve the tension between the scrub deck actuator and the scrub deck.
  • Page 89 Scrub System Service Manual – SC1500 Remove the from the Vacuum Hose Scrub Deck Scrub Deck Press the rear of the Squeegee Mount to disengage it from the pins on Bracket and remove Squeegee Link Weldment from the Vacuum Scrub Deck Squeegee Squeegee Hose...
  • Page 90 Scrub System Service Manual – SC1500 Service Tip: Note of the rotational position of the screw hole in the when Plunger you remove the . Be Shoulder Screw careful not to rotate the Tube once the Plunger Scrub Deck Actuator is disconnected from the scrub deck.
  • Page 91 Scrub System Service Manual – SC1500 14 Disconnect the Scrub Deck Motor Electrical Scrub Deck Motor Connector Electrical 15 Carefully slide the deck out of the machine. Connector Service Tip: The scrub motors on the 20R REV™ scrub decks are slightly taller than the motors on 20D decks. When you remove a 20R REV™ scrub deck you’ll need to jack up and block the front of the machine slightly in order to get adequate clearance to remove the deck from the machine.

  • Page 92: Scrub Deck Actuator Assembly

    Scrub System Service Manual – SC1500 Scrub Deck Actuator Assembly Turn the key switch on, then press the Scrub On/Off Switch to lower the scrub deck to the normal scrub position. This will relieve the tension between the scrub deck actuator and the scrub deck. With the scrub deck down and the key switch on, disconnect the .

  • Page 93: Scrub Deck Actuator Adjustment

    Scrub System Service Manual – SC1500 Service Tip: If you’re going to reinstall the Scrub without readjusting the Deck Actuator position of the , be careful not to Tube rotate the with the Tube Plunger out of the Scrub Deck Actuator machine. This can cause the Scrub to get out of adjustment.

  • Page 94: Specifications

    Scrub System Service Manual – SC1500 Specifications Specifications Component Voltage – 24 VDC RPM – 140 No Load ≈ 6.2 Amps 20D Scrub Deck Brush Motor Normal Operation ≈ 12-19 Amps Current Draw depending on floor surface, solution flow rate and scrub pressure Output Power – 380 Watts / 1/2 HP Voltage – 24 VDC RPM –...

  • Page 95: Solution System

    Service Manual – SC1500 Solution System Functional Description The Solution System is a gravity-feed system that supplies cleaning solution to the scrub brush/pad on the scrub deck. The detergent, supplied from the detergent tank and pump, is added to the solution upstream of the scrub deck.

  • Page 96: Solution Solenoid Valve

    Service Manual – SC1500 Solution System Solution Solenoid Valve controls the solution flow to the L1 Solution Solenoid Valve scrub deck. The solution from the solution tank enters the through the side port and exits through Solution Solenoid Valve Electrical the rear port to the scrub deck as shown.

  • Page 97: Detergent System

    Service Manual – SC1500 Solution System Detergent System The Detergent System uses an electric diaphragm to inject detergent from the Detergent Pump into the cleaning solution Detergent Cartridge upstream of the scrub deck. The A1 Control Board sends voltage pulses to the that Detergent Pump alternate polarity to move the pump plunger and...

  • Page 98: Circuit Descriptions

    Service Manual – SC1500 Solution System Circuit Descriptions Solution Solenoid Valve Off Bat + BRN/VIO SPST Key Switch Control Board Solution Solution Line from E1 Curtis VIO/BLK Solenoid J3-11 Solenoid Valve Bat - 1210 Speed to Scrub Deck Controller Brake - RED/WHT J3-6 Pin 6...

  • Page 99: Solution Solenoid Valve On

    Service Manual – SC1500 Solution System Solution Solenoid Valve On Bat + BRN/VIO SPST Key Switch Control Board Solution Solution Line from E1 Curtis VIO/BLK Solenoid J3-11 Solenoid Valve Bat - 1210 Speed to Scrub Deck Controller Brake - RED/WHT J3-6 Pin 6 +24v...

  • Page 100: Detergent Pump On

    Service Manual – SC1500 Solution System Detergent Pump On The following conditions must be met before the can start: M2 Detergent Pump • There can be no major faults active. • The machine must not be in a low-voltage condition. •...

  • Page 101: Detergent Pump Off

    Service Manual – SC1500 Solution System Detergent Pump Off Control Board Detergent Bat + Pump RED/YEL J1-1 + Bat - J1-3 - Detergent Detergent Pump Bat + Curtis 1210 Pump BLU/GRA Speed Controller Brake - J3-6 RED/WHT Pin 6 Pin 6 Bat - Motion Input 24v When the Detergent System is off, the...
  • Page 102 Service Manual – SC1500 Solution System is mounted on the Scrub Deck Solution Solenoid Valve and controls the solution flow to the scrub brush/pad. Solution Solenoid Valve Scrub Deck The solution controls the solution flow Ball Valve from the solution tank to the Water Filter Ball filters the solution upstream of the...
  • Page 103 Service Manual – SC1500 Solution System is located is Detergent Pump located at the front of the machine underneath the Control Panel Housing/Recovery Tank Cover, and sits below the Prop Rod Prop Rod Mounting Bracket Mounting Bracket Detergent Pump is located Detergent Cartridge at the front of the machine underneath the Control Panel...

  • Page 104: Maintenance

    Service Manual – SC1500 Solution System Maintenance Cleaning the Water Filter Close the solution to shut off the Water Filter Ball Valve solution flow from the solution tank to the Ball Water Valve Filter Unscrew the Filter Cap Remove and clean the internal filter screen. Reinstall the filter screen and Filter Cap Open the...

  • Page 105: Specifications

    Service Manual – SC1500 Solution System Specifications Component Specifications Specifications Component Nominal Voltage – 24 VDC, 11 Watt Solution Solenoid Valve Duty – Continuous Resistance – 55.5 Ohms ±10% @ 25° C Solution Tank Capacity – 12 gal. [45,4 l] Flow per Stroke –...

  • Page 106: Squeegee System

    Service Manual – SC1500 Squeegee System Functional Description Squeegee Assembly is designed to be easily removed from its mounting Squeegee hardware for cleaning and Link Squeegee maintenance. Weldment Mount Bracket Rear Squeegee Strap Knob holds the Assembly (4) Rear Squeegee on the Blade Squeegee...

  • Page 107: Component Locations

    Squeegee System Service Manual – SC1500 Component Locations The following components are included in this section: • Vacuum Hose Assembly • Squeegee Link Weldment • Knob Assemblies • Squeegee Blades • Squeegee Casting • Caster Wheel • Squeegee Mount Bracket •...

  • Page 108: Troubleshooting

    Squeegee System Service Manual – SC1500 Troubleshooting Problem Cause Correction Poor water pick-up. The squeegee blades are torn Check and replace the blades as necessary. or worn. The squeegee assembly is out Readjust the squeegee as follows: 1. Park the machine on a flat, even surface and of adjustment. lower the squeegee.

  • Page 109: Steering System

    Service Manual – SC1500 Steering System Functional Description Steering Wheel attached Steering Shaft connected to and rotate the Steering Upper Universal Joint Wheel Upper Universal Joint drives the which Hex Shaft drives the Steering Tube . Note that the Assembly is designed to Steering Hex Shaft...

  • Page 110: Component Locations

    Steering System Service Manual – SC1500 Component Locations The following components are included in this section: • Upper Universal Joint • Hex Shaft • Steering Tube Assembly • Lower Universal Joint • Steering Plate Upper Universal Joint Hex Shaft Steering are located Upper Tube Assembly...

  • Page 111: Troubleshooting

    Steering System Service Manual – SC1500 is fastened to the top of the Steering Plate Drive Wheel Assembly and rotates the Drive Wheel Assembly to steer the machine left and Steering Plate right. Troubleshooting Problem Cause Correction The steering is The upper and lower universal Realign the upper and lower universal joints.

  • Page 112: Wheel System - Traction

    Service Manual – SC1500 Wheel System - Traction Functional Description The machine is propelled by the Drive which consists of a 24- Wheel Assembly volt DC and attached Drive Wheel Motor Steering that drive an 11-tooth Sprocket Gearbox Plate drives the 11-tooth Sprocket Drive that drives a...

  • Page 113: Wheel Drive Motor Circuit Descriptions

    Wheel System - Traction Service Manual – SC1500 Wheel Drive Motor Circuit Descriptions Power to the E1 Curtis 1210 Speed Controller B+ B- Internal Relay in Battery Charger 1 2 3 Emergency Stop Dead Man Switch WHT/BRN SPST Key Switch Curtis 1210 Speed Controller...

  • Page 114: Speed Control Drive Functions

    Wheel System - Traction Service Manual – SC1500 Speed Control Drive Functions Brake +24V Brake - Pin 6 E1 Curtis 1210 Speed Controller Pin 3 High YEL/BLK Speed GRN/ORG Limit 100K Pot. Pin 18 Wheel Drive Motor Pin 13 Pot. Low Go Switch RED/GRN Pin 4...

  • Page 115: Speed Control Communication With The A1 Control Board

    Wheel System - Traction Service Manual – SC1500 Speed Control Communication with the A1 Control Board B+ B+ Control Board Brake Main Machine E1 Curtis Controller 1210 Speed Controller Motion Input Pin 6 J3-6 RED/WHT + 24v Brake - (B -) Inhibit Input Pin 12 J1-7...
  • Page 116 Wheel System - Traction Service Manual – SC1500 A1 Control Board Speed Controller Function Terminal Terminal Status Signal J3-7 Pin 9 - Status (B -) uses the status signal to tell the Speed Controller when it has set a fault, and which fault is set. Control Board The switch on opens and closes in a pattern...

  • Page 117: Component Locations

    Wheel System - Traction Service Manual – SC1500 Component Locations The following components are included in this section: • Drive Wheel Assembly • E1 Curtis 1210 Speed Controller • Speed Control Adjustment Knob/100k Speed Control Potentiometer • Drive Wheel Brake is fastened to Drive Wheel Assembly the machine frame underneath the front...
  • Page 118 Wheel System - Traction Service Manual – SC1500 controls the Speed Adjustment Knob 100K Speed Control , labeled in the Diagram. The Wiring Potentiometer Speed is mounted on the control panel and controls the Adjustment Knob Speed machine speed in both forward and reverse. Adjustment Knob R1 100k Speed...

  • Page 119: Maintenance And Adjustments

    Wheel System - Traction Service Manual – SC1500 Maintenance and Adjustments Speed Control Programming Options The following table lists the Speed Control parameters that can be accessed and changed using the 1311 Programmer. Note that these parameters normally do not need to be changed, and should not be changed arbitrarily.

  • Page 120: Troubleshooting

    Wheel System - Traction Service Manual – SC1500 Troubleshooting General Troubleshooting Note: use the Service Test Mode to simplify troubleshooting the Drive Wheel System. (Refer to the Controls System/Service Test Mode.) Problem Cause Correction Machine not moving in The Speed Adjustment Knob Rotate the Speed Adjustment Knob to a higher speed forward or reverse. is set too low. setting.

  • Page 121: Diagnostics Method B - Curtis Programmer

    Wheel System - Traction Service Manual – SC1500 Diagnostics Method B - Curtis Programmer Diagnostics Method B uses the optional hand-held Curtis programmer model 1311. With a programmer, diagnostics and troubleshooting are more direct than with the Detergent On/Off Indicator LED alone. The programmer presents complete diagnostic information Display in plain language with no codes to decipher.

  • Page 122: Status Led Fault Code Table

    Wheel System - Traction Service Manual – SC1500 Status LED Fault Code Table Status Light Explanation Possible Cause Code Display Over-/under-temperature cutback 1. Temperature >92°C or < -25°C 2. Excessive load on vehicle 3. Operation in extreme environments 4. Electromagnetic brake not releasing. 0 00 Throttle fault 1.

  • Page 123: Removal And Installation

    Wheel System - Traction Service Manual – SC1500 Removal and Installation Drive Wheel Assembly Loosen the holding the in the Setscrew Steering Assembly Tube lower Steering Universal Joint Assembly Tube Universal Joint Setscrew Disconnect the upper Brake Drive Motor Drive Motor Electrical Connectors Electrical Connector...
  • Page 124 Wheel System - Traction Service Manual – SC1500 Remove the four and flat washers, M8 x 45 Screws then remove the and attached Drive Wheel Assembly from the machine. Spindle Spindle Mount Weldment Mount Weldment Spindle Mount Weldment Drive Wheel Assembly M8 x 45 Screw (4)

  • Page 125: Drive Wheel Motor

    Wheel System - Traction Service Manual – SC1500 Drive Wheel Motor Remove the Drive Wheel Assembly M8 x 55 Screw described on page 123 Loosen the , then back the M6 Locknut Sprocket out of the x 35 Idler Adjuster Screw Idler Assembly Adjust Weldment...
  • Page 126 Wheel System - Traction Service Manual – SC1500 Remove the four and flat washers, M6 x 25 Screws M6 x 25 Screw (4) then remove the from the Drive Motor Drive Wheel Drive Wheel Frame Weldment Frame Weldment To reinstall the into the Drive Motor Drive Wheel...

  • Page 127: Steering Spindle Bearings

    Wheel System - Traction Service Manual – SC1500 Steering Spindle Bearings Remove the Drive Wheel Assembly described on page 123. Remove the Drive Wheel Motor described on page 125. Remove the three M6 x 14 Screws and flat Steering Shaft Weldment washers holding the Steering Shaft Weldment to the Spindle Mount Weldment.
  • Page 128 Wheel System - Traction Service Manual – SC1500 Carefully remove the Shaft Seal, Bearing Cup and Bearing Cone from the Bearing Block. Replace the Shaft Seal, Bearing Cup or Bearing Cone as necessary. Make sure the Bearing Cone is greased adequately with a high-quality lithium-base grease before reassembly. Bearing Cone Shaft...

  • Page 129: Drive Wheel Motor Maintenance

    Wheel System - Traction Service Manual – SC1500 Drive Wheel Motor Maintenance Replacing the Motor Brushes Remove the Drive Wheel Assembly described on page 123. Remove the Drive Wheel Motor described on page 125. Remove the Cap holding the brush in the motor. Carefully pry out the old Brush from the motor.

  • Page 130: Specifications

    Wheel System - Traction Service Manual – SC1500 Specifications Shop Measurements The following table lists measurements taken from one SC1500. While these are not “specifications”, they can help you recognize abnormal vs. normal conditions. Note that the black voltmeter lead is on B- unless otherwise indicated. E1 Curtis 1210 Speed Controller –...

  • Page 131: E1 Curtis 1210 Speed Controller - Output

    Wheel System - Traction Service Manual – SC1500 E1 Curtis 1210 Speed Controller – Output Ref. Measurements FWD low speed 12.6v FWD high speed 23.4v REV low speed 11 v REV high speed 3.9v FWD low speed 11.2v FWD high speed 0.17v REV low speed 12v REV high speed 20v FWD low speed 1.5v...

  • Page 132: Special Tools

    Wheel System - Traction Service Manual – SC1500 Special Tools Curtis 1311 Handheld Programmer, p/n 56409441...

This manual is also suitable for:

Advance sc1500-51dAdvance sc1500-x20dAdvance sc1500-x20r561040005610400156104002

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