Advance SC450 Service Manual

Service Manual SC450

Advance SC450, 9087331020
Nilfisk SC450, 9087330020 - 9087370020
Nilfisk SC450, 9087332020 - 9087372020‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​​​‌​​​‌​‍‍​‌⁠‌⁠⁠‌‍​‌‍⁠‍‍‌​⁠‍⁠‌‌‌‌‍​

English

Form No. 9099600000
11-12 - Revised 4-14 (2)

Index

• Index (page 2)
• General Information (page 5)
• Machine General Description (page 5)
• Service Manual Purpose and Field of Application (page 5)
• Other Reference Manuals (page 5)
• Conventions (page 6)
• Service and Spare Parts (page 6)
• Serial Number Label (page 6)
• Safety (page 7)
• Symbols (page 7)
• General Instructions (page 7)
• Machine Lifting (page 10)
• Machine Transportation (page 10)
• Machine Nomenclature Battery Version (know your machine) (page 11)
• Control Panel Battery Version (page 13)
• Machine Nomenclature Cable Version (know your machine) (page 14)
• Control Panel Cable Version (page 16)
• Service and Diagnostic Equipment (page 17)
• Technical Data Battery Version (page 18)
• Technical Data Cable Version (page 19)
• Dimensions (page 20)
• Maintenance (page 21)
• Scheduled Maintenance Table (page 21)
• Control System - Battery Version (page 22)
• Functional Description (page 22)
• Wiring Diagram (page 22)
• Component Location (page 23)
• Removal and Installation (page 24)
• Specifications (page 27)
• Connectors on the Function Electronic Board (page 28)
• Control System - Cable Version (page 29)
• Functional Description (page 29)
• Wiring Diagram (page 29)
• Component Location (page 30)
• Removal and Installation (page 31)
• Electrical System - Battery Version (page 33)
• Functional Description (page 33)
• Fuses (page 33)
• Wiring Diagram (page 33)
• Component Location (page 34)
• Maintenance and Adjustments (page 35)
• Troubleshooting (page 41)
• Machine Wiring Diagram (page 42)
• Specifications (page 43)
• Electrical System - Cable Version (page 44)
• Wiring Diagram (page 44)
• Specifications (page 45)

Index

• Recovery System - Battery Version (page 46)
• Functional Description (page 46)
• Wiring Diagram (page 46)
• Component Location (page 47)
• Maintenance and Adjustments (page 48)
• Troubleshooting (page 49)
• Removal and Installation (page 50)
• Specifications (page 53)
• Recovery System - Cable Version (page 54)
• Functional Description (page 54)
• Wiring Diagram (page 54)
• Component Location (page 55)
• Maintenance and Adjustments (page 56)
• Troubleshooting (page 57)
• Removal and Installation (page 58)
• Specifications (page 61)
• Scrub System, Disc - Battery Version (page 62)
• Functional Description (page 62)
• Wiring Diagram (page 62)
• Component Location (page 63)
• Maintenance and Adjustments (page 64)
• Troubleshooting (page 66)
• Removal and Installation (page 67)
• Specifications (page 73)
• Scrub System, Disc - Cable Version (page 74)
• Functional Description (page 74)
• Wiring Diagram (page 74)
• Component Location (page 75)
• Maintenance and Adjustments (page 76)
• Troubleshooting (page 78)
• Removal and Installation (page 79)
• Specifications (page 81)
• Solution System - Battery Version (page 82)
• Functional Description (page 82)
• Wiring Diagram (page 82)
• Component Location (page 83)
• Maintenance and Adjustments (page 84)
• Troubleshooting (page 85)
• Specifications (page 85)
• Solution System - Cable Version (page 86)
• Functional Description (page 86)
• Wiring Diagram (page 86)
• Component Location (page 87)
• Maintenance and Adjustments (page 88)
• Troubleshooting (page 89)
• Specifications (page 89)

Index

• Squeegee System (page 90)
• Functional Description (page 90)
• Component Location (page 91)
• Maintenance and Adjustments (page 92)
• Troubleshooting (page 94)
• Removal and Installation (page 95)
• Specifications (page 97)
• Wheel System, Non-Traction (page 98)
• Component Location (page 98)
• Specifications (page 99)

Machine general description

The SC450 is a “walk behind” industrial machine designed to wash and dry floors, in civil or industrial environments, in one pass. The machine is powered by on-board batteries (Battery version) and with electric mains via power supply cable (cable version). The machine is equipped with a single disc brush, a controlled solution flow dosing system and a rear squeegee with blades, which dries the floor by vacuuming the dirty water.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​​‌‌​​​‌​‍‍​​⁠‍‌‍‌‍‍‍​‍⁠‍​⁠⁠‍‌‌‍​​‍​

Service manual purpose and field of application

This document is a technical resource intended to help service technicians when carrying out maintenance and repairs on the SC450, 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

These manuals are available at:

• Local Nilfisk-Advance Retailer
• Nilfisk-Advance website: www.nilfisk.com - www.advance-us.com

Conventions

Forward, backward, front, rear, left or right are intended with reference to the operator’s position, that is to say in driving position with the hands on the handlebar.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​​‌‍​​​‌​‍‍​​‍‍⁠‌​‍​‍​‍‍‍‍‍⁠‌⁠⁠‍‌‌‌⁠

Service and spare parts

Service and repairs must be performed only by authorised personnel or Nilfisk Service Centers. The authorised personnel is trained directly at the manufacturer’s premises and has original spare parts and accessories. Contact Nilfisk Retailer indicated below for service or to order spare parts and accessories, specifying the machine model and serial number.

(Please, apply Retailer label here)

Serial number label

The model name and serial number are marked on the plate (see the example to the side). Product number and year of production are marked on the same plate. This information is useful when requiring machine spare parts. Use the following table to write down the machine identification data.

Safety

The following symbols indicate potentially dangerous situations. Always read this information carefully and take all necessary precautions to safeguard people and property.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​​‌⁠​​​‌​‍‍​⁠​‌⁠​‌⁠‍​‌‌⁠‌‍​⁠⁠​⁠‌‌​⁠‍

Symbols

Note: It indicates a remark related to important or useful functions.

General instructions

Specific warnings and cautions to inform about potential damages to people and machine are shown below.

Safety cautions

Safety cautions (continued)

Machine lifting

Machine transportation

Machine nomenclature, battery version (know your machine)

Machine nomenclature, battery version (continued)

Control panel, battery version

Machine nomenclature, cable version (know your machine)

Machine nomenclature, cable version (continued)

Control panel, cable version

The callout labels in this drawing are printed in Italian in the manual. Interruttore spazzola means brush switch, Interruttore impianto di aspirazione means vacuum system switch, and Pulsante di azionamento spazzola means brush enabling push-button, as on page 13.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌​​​​​‌​‍‍​‌‌‍‍‌⁠‍‌‌​​​‌​⁠‍‍‍⁠⁠​​⁠​

Service and diagnostic equipment

Besides a complete set of standard meters, the following instruments are necessary to perform fast checks, maintenance and repairs on Nilfisk-Advance machines:‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌​‌​​​‌​‍‍​⁠‌⁠​‌⁠‍‍​​‌‌‍⁠⁠‍​​​‍​‍​⁠

Besides a complete set of standard meters, the following instruments are necessary to perform fast checks and repairs on Nilfisk-Advance machines:

• Laptop computer charged with the current version of EzParts, Adobe Reader and (if possible) Internet connection
• Digital Volt Meter (DVM)
• Amperometric pliers with possibility of making DC measurements
• Hydrometer
• Battery charge tester to check 12V batteries
• Static control wrist strap
• Dynamometric wrench set
• A copy of the Instruction for use and Spare Parts List of the machine to be serviced (provided with the machine or available at www.advance-us.com or other Nilfisk-Advance websites).

The following equipment is also available at Nilfisk-Advance Centers:

• Vacuum water lift gauge, P/N 56205281

Technical data, battery version

Technical data, cable version

Corrected an obvious misprint: vacuum water lift printed as "1.200 mm H2O" (now 1,200 mm H2O, which is 47.2 inH2O, and matches the thousands comma used on page 18).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌​⁠​​​‌​‍‍​‍⁠‍‍⁠‍⁠‍⁠‍​⁠⁠⁠⁠​⁠​‍‌‌‌​‍

Dimensions

Overall length 46.4 in (1,180 mm), squeegee width 30 in (760 mm), height 41.7 in (1,060 mm).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌‌​​​​‌​‍‍​​⁠​⁠‍​‌​​‍⁠​⁠‌​⁠‌​‌⁠⁠‍⁠‍

Maintenance

The lifespan of the machine and its maximum operating safety are ensured by correct and regular maintenance.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌‌‌​​​‌​‍‍​​‍⁠‍‌‌​‌⁠‍‍⁠​‌‍​⁠​‌‌‍⁠​‍

The following table provides the scheduled maintenance. The intervals shown may vary according to particular working conditions, which are to be defined by the person in charge of the maintenance. For instructions on maintenance procedures, see the following paragraphs.

Scheduled maintenance table

A ● marks the interval for each procedure.

Control system, battery version

Functional description

The function control is performed directly by the brush switch (SW1), the vacuum system switch (SW2) and the brush activation push-buttons (SW3 with SW4).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌‌‍​​​‌​‍‍​​‍‌⁠‍​‌​‍‍‍​‌‍‌‍​‍⁠⁠‍‍⁠​

The switches (SW1) and (SW2) power the function electronic board (EB1).

The control circuits are protected by the fuse (F3) on the function electronic board (EB1).

The battery voltage is shown on the electronic board LED (EB2).

Wiring diagram

Component location

• Brush switch (SW1)
• Vacuum system switch (SW2)
• Brush activation push-button (SW3)
• Battery voltage LEDs
• Function electronic board (EB1)
• LED electronic board (EB2)
• Wiring harness

Removal and installation

Function electronic board disassembly/assembly: disassembly

1. Drive the machine on a level floor. Make sure that the machine cannot move independently.
2. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
3. Move aside the recovery water drain hose.
4. Remove the battery charger cable, if equipped, from the cable holder.
5. Remove the screws (A).
6. Carefully move the panel (B) by disengaging the wiring harness grommet (C) from its housing.
7. Disconnect the connectors (D) of the function electronic board (E).
8. Disengage the four fasteners (F) and remove the function electronic board (E).

Assembly

9. Assemble the components in the reverse order of disassembly, and note the following:
   • When installing a new function electronic board (E), set the following:
     • battery charger on board (Ch) or not (NO Ch), with the selector (G)
     • battery type, Pb (Wet) or Gel, with the selector (H)

Brush activation push-button disassembly/assembly (old version)

Disassembly

1. Drive the machine on a level floor. Make sure that the machine cannot move independently.
2. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
3. Remove the screws (A) and move the brush activation push-button (B).
4. Loosen the ring nut (C) off the bulkhead connection and push the cable (D) inside the handlebar as much as possible, then pull the cables (E) with the joints (F) of the push-button (B).
5. Cut the cables (E) on the joints (F) and retrieve the push-button (B).

Assembly

6. Assemble the components in the reverse order of disassembly, and note the following:
   • Restore the connections (F) by using the joints supplied with the push-button.
   • Before tightening the ring nut (C) push the cable (D) inside the handlebar as much as possible.

Brush activation push-button disassembly/assembly (new version)

Disassembly

1. Drive the machine on a level floor. Make sure that the machine cannot move independently.
2. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
3. Remove the screws (A) and move the brush activation push-button (B).
4. Loosen the ring nut (C) off the bulkhead connection and push the cable (D) inside the handlebar as much as possible, then pull the cables (E) with the connectors (F) of the push-buttons (B).
5. Disconnect the connectors (F) and retrieve the push-buttons (B).

Assembly

6. Assemble the components in the reverse order of disassembly, and note the following:
   • Before tightening the ring nut (C) push the cable (D) inside the handlebar as much as possible.

Corrected an obvious misprint: the first sub-heading is printed in Italian as "Smontaggio" (now Disassembly, as on page 25).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌‍‍​​​‌​‍‍​​‍‍‌⁠‍⁠⁠⁠⁠⁠⁠​‌​⁠​‍‌‌‍‌⁠⁠

Specifications

Function electronic board specifications

The function electronic board performs the following:‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌‍⁠​​​‌​‍‍​⁠​⁠‍⁠‍‌‌⁠⁠​‍‍⁠‌​‍‌‌‍‌‍‍‌

1. BRUSH MOTOR PROTECTION: By reading the voltage drop across (F1) fuse, the main brush motor amperage (M1) is monitored. If the voltage drop is higher than 40 mV, the 3 LEDs on the LED electronic board (EB2) start flashing simultaneously. If this condition persists, after a time inversely proportional to the value of voltage drop detected, the brush motor is stopped. To reset the protection, the electronic board must be turned off and on with the switches (SW1) and (SW2).
2. BATTERY PROTECTION: Battery charge status is shown by the 3 LEDs on the LED electronic board (EB2), depending on the type of battery (WET/GEL) according to the following diagram:

When the red LED starts flashing, brush and vacuum system functions are automatically deactivated.

3. PROCEDURE FOR BATTERY SETTING (WET/GEL): on the electronic board there is a dip-switch with 2 positions, marked as “WET” and “GEL”.

Connectors on the function electronic board

J1 - 8 way-connector

J2 - 8 way-connector

J3 - 3 way-connector

F1 - Faston

Control system, cable version

Functional description

The function control is performed directly by the brush switch (SW1), the vacuum system switch (SW2) and the brush activation push-buttons (SW3 with SW4).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌⁠‌​​​‌​‍‍​‍​​‍⁠‍⁠​​‍⁠‌​​‌​‍‍⁠‌​‍‌⁠

The switches (SW1) and (SW2) power the function electronic board (EB1).

Wiring diagram

Component location

• Brush switch (SW1)
• Vacuum system switch (SW2)
• Brush activation push-buttons (SW3) (SW4)
• Mains filter (FL1)
• Brush motor relay (ES1)

Removal and installation

Brush activation push-button disassembly/assembly (old version): disassembly

1. Drive the machine on a level floor. Make sure that the machine cannot move independently.
2. Make sure that the power supply cable plug is disconnected from the electrical mains.
3. Remove the screws (A) and move the brush activation push-button (B).
4. Loosen the ring nut (C) off the bulkhead connection and push the cable (D) inside the handlebar as much as possible, then pull the cables (E) with the joints (F) of the push-button (B).
5. Cut the cables (E) on the joints (F) and retrieve the push-button (B).

Assembly

6. Assemble the components in the reverse order of disassembly, and note the following:
   • Restore the connections (F) by using the joints supplied with the push-button.
   • Before tightening the ring nut (C) push the cable (D) inside the handlebar as much as possible.

Corrected an obvious misprint: the steps are printed numbered 1, 1, 2, 3, 4, 5. They are numbered in sequence here, 1 to 6.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‌⁠⁠​​​‌​‍‍​‌‌‌‌‌​​‍‌‍⁠⁠‌‍⁠​‌​⁠​‍​⁠⁠

Brush activation push-button disassembly/assembly (new version)

Disassembly

1. Drive the machine on a level floor. Make sure that the machine cannot move independently.
2. Make sure that the power supply cable plug is disconnected from the electrical mains.
3. Remove the screws (A) and move the brush activation push-button (B).
4. Loosen the ring nut (C) off the bulkhead connection and push the cable (D) inside the handlebar as much as possible, then pull the cables (E) with the connectors (F) of the push-buttons (B).
5. Disconnect the connectors (F) and retrieve the push-buttons (B).

Assembly

6. Assemble the components in the reverse order of disassembly, and note the following:
   • Before tightening the ring nut (C) push the cable (D) inside the handlebar as much as possible.

Corrected obvious misprints: the first sub-heading is printed in Italian as "Smontaggio" (now Disassembly, as on page 31), and the steps are printed numbered 1, 1, 2, 3, 4, 5 (numbered in sequence here, 1 to 6).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‍​​​​​‌​‍‍​​‍​​⁠‌‍⁠‍‍‌‍‍⁠‍​‍⁠‌‍⁠⁠‌⁠

Electrical system, battery version

Functional description

Basically the electrical system consists of a function electronic board (EB1) which determines the brush and vacuum system motor activation by means of the relevant switches (SW1) and (SW2), disabling them when the battery voltage drops below the battery safety threshold value.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‍​‌​​​‌​‍‍​​‍‍​⁠​‌‌‍‌‌⁠⁠​‍‍‌‍⁠​‍‍‍‌

The battery is connected to the system by means of the ANDERSON POWER connector (C1).

The on-board battery charger (CH) is connected to the battery with the red (+) and black (-) connector (C2) and supplies the enabling signal (+24V) to activate the machine functions only when its yellow connector (C2) is disconnected from the electrical mains. When the battery charger is connected to the electrical mains, the battery charger inner relay opens the contact and stops the enabling signal on the yellow connector (C2). When the battery charger is not installed, the yellow connector (C2) is not connected and the dip-switch on the electronic board (EB1) must be turned to “NO CH”.

For further details, see the descriptions of individual sub-systems.

Fuses

The brush motor circuit is protected from short-circuits by the 40A fuse (F1). The motor is protected from overloads by means of the electronic protection system described in the Function Electronic Board Specifications chapter.

The vacuum system motor circuit is protected by the 30A blade fuse (F2).

The solenoid valve (EV1) and the function electronic board (EB1) control circuits are protected by 5A blade fuses (F3) on the function electronic board (EB1).

Wiring diagram

Component location

Note: in the drawing the callouts read "Control/solenoid fuse (F2)" and "Vacuum fuse (F3)", the reverse of the list above and of page 33, which give F2 as the vacuum fuse and F3 as the control/solenoid fuse. The drawing is shown as printed.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‍​‍​​​‌​‍‍​‌​⁠‍‍⁠⁠‌​⁠‍⁠‍​‌‍⁠‍‍‌‌⁠‌‍

Maintenance and adjustments

Battery installation and battery type setting (WET or GEL/AGM)

Set the electronic board of the machine and of the battery charger (if equipped) according to the type of batteries installed (WET or GEL/AGM) as shown below:‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‍​⁠​​​‌​‍‍​​‍‍‍​‍​​‍⁠‍‌‍⁠⁠‍‍‍‌​​‍⁠‍

Machine setting

1. Ensure the battery connector (A) is disconnected.

   The machine factory setting is for GEL batteries. If this setting corresponds to the type of batteries installed, go to step 7. Otherwise, perform steps 2 to 6.

2. Move aside the recovery water drain hose.
3. Remove the battery charger cable, if equipped, from the cable holder (B).
4. Remove the screws (C) and carefully move aside the panel (D) by disengaging the grommet (E) from its housing on the panel (D).
5. Turn the microswitch (F) to WET position.
   Warning! Do not move/set the adjacent switch (G).
6. Perform steps 2 to 5 in the reverse order.

Battery installation and battery type setting (WET or GEL/AGM) (continues)

Battery charger setting (for machines with on-board battery charger)

7. Remove the battery charger data inspection window screws (N).
8. Remove the window (H).
9. Turn the battery charger selector (I) to WET for lead batteries, or to GEL for GEL/AGM batteries.
10. Install the window (H) and tighten the screws (N).

Battery installation

11. Remove the recovery tank cover (J).
12. Install the batteries (K) on the machine according to the diagram (L).
    Warning! For a proper machine balance, install the batteries in the compartment, with the shims (M) placed on the rear wall.
13. Install the recovery tank cover (J).
14. If necessary, charge the batteries (see the Battery charging paragraph).

Battery charging

Note: Charge the batteries when the yellow or red warning light on the control panel turns on, or at the end of every working cycle.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‍‌‌​​​‌​‍‍​⁠‍⁠​⁠​‍‍‌‍⁠⁠⁠⁠‌⁠⁠‌​‌​‍‌‍

1. Drive the machine to the appointed recharging area.
2. Turn off the machine by turning the switches to “0”.
3. For WET batteries only:
   • Tip up the recovery tank.
   • Check the level of electrolyte inside the batteries; if necessary, top up through the caps.
   • Leave all the battery caps open for next charging.
   • If necessary, clean the upper surface of the batteries.
4. Charge the batteries according to one of the following procedures, depending on the presence of the electronic battery charger.

Battery charging (continues)

Charging the batteries with an external battery charger

5. Check that the external battery charger is suitable by referring to the battery charger Manual. The battery charger voltage rating must be 24 V.
6. Disconnect the battery connector (A) and connect it to the external battery charger.
7. Connect the battery charger to the electrical mains.
8. After charging, disconnect the battery charger from the electrical mains and from the battery connector (A).
9. (For WET batteries only): Check the level of electrolyte inside the batteries (B) and close all the caps (C).
10. Connect the battery connector (A) to the machine.
11. (For WET batteries only): Tip down the recovery tank.

Battery charging (continues)

Charging the batteries with an (optional) battery charger installed on the machine

12. Connect the battery charger cable (D) to the electrical mains (the electrical mains voltage and frequency must be compatible with the battery charger values shown on the machine serial number plate (E)).
    When the battery charger is connected to the electrical mains, all machine functions are automatically cut off.
    If the warning light (F) on the battery charger control panel stays on, the battery charger is charging the batteries.
13. When the green warning light (G) turns on, the battery charging is completed.
14. When the battery charging is completed, disconnect the battery charger cable (D) from the electrical mains and wind it round its housing (H).
15. (For WET batteries only): Tip down the recovery tank.

Note: For further information about the battery charger operation, see the Battery charger Manual.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‍‌⁠​​​‌​‍‍​‌‌​​‌​⁠⁠‌‌‍‌‌​⁠⁠‌⁠​⁠‍​‍⁠

Fuse check and replacement

1. Drive the machine on a level floor. Make sure that the machine cannot move independently.
2. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
3. Move aside the recovery water drain hose.
4. Remove the battery charger cable, if equipped, from the cable holder.
5. Remove the screws (A).
6. Carefully move the panel (B) by disengaging the wiring harness grommet (C) from its housing.
7. Check the following fuses for integrity:
   • (D) Brush deck fuse F1 (40 A)
   • (E) Vacuum system fuse F2 (30 A)
   • (F) Electronic board fuse F3 (5 A)
8. Replace the open fuse, when the component that caused deactivation has fully cooled down. Parts ›
9. Engage the grommet (C) and install the cover (B), then tighten the screws.
10. Place the battery charger cable, if equipped, on the cable holder.
11. Connect the battery connector (red).

Charge condition display

Troubleshooting

Machine wiring diagram

Specifications

Electrical system, cable version

Wiring diagram

Specifications

Recovery system, battery version

Functional description

The water 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). The dirty water is piped into the recovery tank, while the airflow continues to the vacuum fan.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​‍⁠‍​​​‌​‍‍​‌​‌⁠‌​‌‌⁠​‍​​‍⁠⁠⁠⁠‍‍‍​⁠‍

The vacuum system motor (M2) is supplied by the relay (ES2) which is driven by the electronic board (EB1) when the switch (SW2) is closed. The circuit is protected by the vacuum fuse (F2).

The automatic float in the vacuum grid stops vacuum system motor (M2) from collecting any liquids.

When the automatic float closes and shuts down the vacuum system, the vacuum system motor noise will increase and the floor will not be dried.

When the recovery tank is full it can be emptied through the drain hose.

Wiring diagram

Component location

Maintenance and adjustments

Tank and vacuum grid cleaning

1. Drive the machine to the appointed disposal area.
2. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
3. Discharge the recovery water from the relevant tank.
4. Open the recovery tank cover (A), then clean and wash the cover, the tank (B) and the vacuum grid (C) with clean water.
   If necessary, remove the grid (C) clean it carefully and reinstall it.
   If necessary, clean also the solution tank.
   Drain the water from the tanks with the relevant drain hoses.
5. Check the recovery tank cover gasket (D) for integrity.
   The gasket (D) must be in good shape, as it is necessary for the recovery tank stay sealed.
   If necessary replace the gasket (D) by removing it from its housing. When assembling the new gasket, install its junction (E) in the central rear area as shown in the figure. Parts ›
6. Check that the seating surface (F) of the gasket (D) is integral and adequate for the gasket itself.
7. Close the recovery tank cover (A).

Corrected an obvious misprint: step 6 is printed "the gasket (E)". The gasket is (D) and (E) is its junction, as in step 5 (now gasket (D)).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​⁠​​​​​‌​‍‍​​‍⁠⁠‍⁠‌‌‍‍⁠⁠‌‍‍‍​​​‌‍⁠⁠‍

Troubleshooting

Removal and installation

Vacuum system motor amperage check

1. Check that the squeegee and the vacuum hose are clean and that there is no dirt in their inner parts.
2. Keep the squeegee lifted.
3. Remove the recovery water tank.
   Warning! Do not touch uncovered electrical components while performing the following steps.
4. Apply the Amp clamp (A) on the battery cable (B).
5. Turn on the vacuum system and check that the vacuum system motor amperage is 13 - 17 A at 24 V.
   Turn off the vacuum system.
   Remove the Amp clamp (A).
   If the amperage is higher, perform the following procedures to detect and correct the abnormal input:
   • Check that the vacuum fuse (F2) is properly positioned
   • Check the condition of the vacuum system motor carbon brushes
   • Remove the vacuum system motor (see the procedure in the Vacuum System Motor Disassembly/Assembly paragraph), and check the condition of all its components.

   If the above-mentioned procedures do not produce the correct readings for the vacuum system motor amperage, the motor must be replaced (see the procedure in the Vacuum System Motor Disassembly/Assembly paragraph).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​⁠​‍​​​‌​‍‍​‍⁠⁠‍‍‌‌‌​⁠‌‍⁠‍​‌‍​‌‍‌⁠⁠‍

Reassembly

6. Assemble the components in the reverse order of disassembly.

Corrected an obvious misprint: the sub-heading is printed "Reassemby" (now Reassembly).

Vacuum system motor carbon brush check/replacement

Disassembly/check

1. Remove the vacuum system motor (see the procedure in the Vacuum System Motor Disassembly/Assembly paragraph).
2. At the workbench, remove the sealing ring (A) from the vacuum system motor (B).
3. Remove the fan cover (C) by disengaging its inner fasteners.
4. With a proper tool, remove the soldering (D) between both lead-in wires (E).
5. Disconnect the lead-in wires (E).
6. Remove the screws (F) and remove the carbon brushes (G).
7. Check the carbon brushes (G) for wear. The carbon brushes are worn when:
   • The contact with the motor armature is insufficient
   • The contact surface is not even
   • The stroke is less than 0.12 in (3 mm)
   • The thrust spring is broken, etc.

   In this cases, replace both motor carbon brushes. Parts ›‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​⁠​⁠​​​‌​‍‍​‍‌‌⁠⁠⁠‍​⁠​​⁠​‌​​​‍‍‍⁠⁠⁠​

Assembly

8. Assemble the components in the reverse order of disassembly, and note the following:
   • after connecting the lead-in wires (E) fasten them with a soldering (D).

Corrected an obvious misprint: step 7 is printed "carbon brushes (D)". The carbon brushes are (G) and (D) is the soldering, as in step 6 (now carbon brushes (G)).

Vacuum system motor disassembly/assembly

1. Remove the recovery water tank.
2. Loosen the fastener (A) and disconnect the hose (B) from the vacuum system motor below.
3. Remove the screws (C) and remove the cover (D).
4. Disconnect the connector (E) and remove the vacuum system motor (F) by lifting it. Parts ›

Assembly

5. Assemble the components in the reverse order of disassembly.

Specifications

Recovery system, cable version

Functional description

The water 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). The dirty water is piped into the recovery tank, while the airflow continues to the vacuum fan.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​⁠‌‍​​​‌​‍‍​‍‌⁠‍⁠⁠‌⁠⁠‌​⁠‌‍​​‌​​​⁠​⁠‌

The vacuum system motor (M2) is supplied by the switch (SW2).

The automatic float in the vacuum grid stops vacuum system motor (M2) from collecting any liquids.

When the automatic float closes and shuts down the vacuum system, the vacuum system motor noise will increase and the floor will not be dried.

When the recovery tank is full it can be emptied through the drain hose.

Wiring diagram

Component location

Maintenance and adjustments

Tank and vacuum grid cleaning

1. Drive the machine to the appointed disposal area.
2. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
3. Discharge the recovery water from the relevant tank.
4. Open the recovery tank cover (A), then clean and wash the cover, the tank (B) and the vacuum grid (C) with clean water.
   If necessary, remove the grid (C) clean it carefully and reinstall it.
   If necessary, clean also the solution tank.
   Drain the water from the tanks with the relevant drain hoses.
5. Check the recovery tank cover gasket (D) for integrity.
   The gasket (D) must be in good shape, as it is necessary for the recovery tank stay sealed.
   If necessary replace the gasket (D) by removing it from its housing. When assembling the new gasket, install its junction (E) in the central rear area as shown in the figure. Parts ›
6. Check that the seating surface (F) of the gasket (D) is integral and adequate for the gasket itself.
7. Close the recovery tank cover (A).

Corrected an obvious misprint: step 6 is printed "the gasket (E)". The gasket is (D) and (E) is its junction, as in step 5 (now gasket (D)).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​⁠‍​​​​‌​‍‍​⁠‍⁠​‌‍‌⁠‍​⁠⁠‍‌⁠⁠‌‌​‌⁠‌​‍

Troubleshooting

Removal and installation

Vacuum system motor amperage check

1. Check that the squeegee and the vacuum hose are clean and that there is no dirt in their inner parts.
2. Keep the squeegee lifted.
3. Remove the recovery water tank.
   Warning! Do not touch uncovered electrical components while performing the following steps.
4. Apply the Amp clamp on the electrical main cable.
5. Turn on the vacuum system and check that the vacuum system motor amperage is 2.0 and 3.0 A at 230 Vac.
   Turn off the vacuum system.
   Remove the Amp clamp (A).
   If the amperage is higher, perform the following procedures to detect and correct the abnormal input:
   • Check the condition of the vacuum system motor carbon brushes
   • Remove the vacuum system motor (see the procedure in the Vacuum System Motor Disassembly/Assembly paragraph), and check the condition of all its components.

   If the above-mentioned procedures do not produce the correct readings for the vacuum system motor amperage, the motor must be replaced (see the procedure in the Vacuum System Motor Disassembly/Assembly paragraph).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​⁠‍‍​​​‌​‍‍​​⁠⁠‌‌‌⁠‌‌‌‌⁠‌‍‍‍​⁠‍⁠​⁠​‍

Reassembly

6. Assemble the components in the reverse order of disassembly.

Corrected obvious misprints: the sub-heading is printed "Reassemby" (now Reassembly), and the amperage is printed in Italian style as "2,0 e 3,0 Amp at 230 Vac" (now 2.0 and 3.0 A at 230 Vac).

Vacuum system motor carbon brush check/replacement

Disassembly/check

1. Remove the vacuum system motor (see the procedure in the Vacuum System Motor Disassembly/Assembly paragraph).
2. At the workbench, remove the sealing ring (A) from the vacuum system motor (B).
3. Remove the fan cover (C) by disengaging its inner fasteners.
4. With a proper tool, remove the soldering (D) between both lead-in wires (E).
5. Disconnect the lead-in wires (E).
6. Remove the screws (F) and remove the carbon brushes (G).
7. Check the carbon brushes (G) for wear. The carbon brushes are worn when:
   • The contact with the motor armature is insufficient
   • The contact surface is not even
   • The stroke is less than 0.12 in (3 mm)
   • The thrust spring is broken, etc.

   In this cases, replace both motor carbon brushes. Parts ›‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​⁠‍⁠​​​‌​‍‍​​‌‌​‌​​‍​⁠⁠‍‍‌‌‌‌​‌​⁠⁠⁠‍

Assembly

8. Assemble the components in the reverse order of disassembly, and note the following:
   • after connecting the lead-in wires (E) fasten them with a soldering (D).

Corrected an obvious misprint: step 7 is printed "carbon brushes (D)". The carbon brushes are (G) and (D) is the soldering, as in step 6 (now carbon brushes (G)).

Vacuum system motor disassembly/assembly

1. Remove the recovery water tank.
2. Loosen the fastener (A) and disconnect the hose (B) from the vacuum system motor below.
3. Remove the screws (C) and remove the cover (D).
4. Disconnect the connector (E) and remove the vacuum system motor (F) by lifting it. Parts ›

Assembly

5. Assemble the components in the reverse order of disassembly.

Specifications

Corrected an obvious misprint: vacuum water lift is printed "0.44 hp (550 W, 50-60 Hz)", a copy of the row above. Now 47.2 inH2O (1,200 mm H2O), as on page 19.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​⁠⁠‌​​​‌​‍‍​​​‌⁠‍‍‍‌⁠⁠⁠​‌​‌​‍‍‌‍​‍‌​

Scrub system, disc, battery version

Functional description

The disc brush system can be started by the operator. The disc brush turn counter-clockwise.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​​⁠⁠‍​​​‌​‍‍​‌‌‌⁠⁠‌‌‌​‍‍​​​⁠⁠​⁠‍⁠⁠​⁠‍

The brush system, when turning, cleans/washes the floor surface and assist machine forward movement.

The deck, where brushes suitable for cleaning the particular type of floor are installed, is the main part of the brush system. The brush deck is fixed and integrated in the machine with a support plate. On the support plate, there are two handwheels to adjust the machine straight forward movement and speed.

The brush working pressure is functional to the machine designed balance.

The brush motor (M1) is supplied by the electromagnetic switch (ES1) which is driven by the function electronic board (EB1) when the switches (SW1) and (SW3 with SW4) are closed. The circuit is protected by the brush fuse (F1) and by the electronic protection system described in the Function Electronic Board Specifications, in the Control System chapter.

The system, once activated, uses the solution coming form the solution system, to wash the floor.

In case of brush motor overload, a safety system stops the brushes after about one minute of continuous overload. The overload is shown by the three battery warning LEDs flashing simultaneously.

The overload is detected by monitoring the current flow on the motor. The current is measured by checking the voltage drop through the brush fuse (F1). If the voltage drop is higher than 40 mV, the 3 battery LEDs flash simultaneously and, if the overload persists, the motor stops after a variable delay, depending on the overload amount.

To start scrubbing again after a brush stop due to overload, turn off and then on the machine with the brush switch (SW1).

To work properly, the brush motor needs the following:

• Brush switch (SW1) turned on
• Push-button (SW3) pressed
• Charged battery (the red LED must not be flashing).

Wiring diagram

Component location

Maintenance and adjustments

Brush cleaning

1. Drive the machine on a level floor and lift the brush/pad-holder deck. Make sure that the machine cannot move independently.
2. Check that the control panel switches are turned to “0”.
3. Remove the brush/pad-holder (A) according to the following procedure:
   • When the deck is lifted, grab the brush/pad-holder with the hands and turn it first in one direction (B) and then in the other direction (C) to release it.
4. Clean the brush with water and detergent.
5. Check the brush bristles for integrity and wear; if necessary, replace the brush. Parts ›
6. Install the brush.

Machine forward movement adjustment

Note: The machine speed and forward movement vary according to the type of floor to be cleaned and the choice of using the brush or the pad. If necessary, perform the following procedure.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌​​‌​​​‌​‍‍​‍​​‌‌‌⁠​⁠‌‍⁠‌‍​​‍‍‍⁠⁠⁠⁠⁠

1. Adjust the machine speed with the handwheel (A) according to the following procedure:
   • Turn it counter-clockwise to increase the machine speed.
   • Turn it clockwise to decrease the machine speed.
2. If it is difficult to keep the machine moving straight-forwardly because it deviates to the left or to the right, adjust the knob (B) by turning it clockwise or counter-clockwise.
3. With the machine ready to operate, perform hands-on tests of the machine speed; if necessary, perform step 2 again.

Troubleshooting

Open circuit

• The brush fuse (F1) determines an open in the supply circuit of the brush deck motor. This system allows to prevent the circuits from being damaged under overload conditions.
• The open in the fuse can be caused by the following:
• Short circuit in the brush motor wiring harness; fault in the motor.

Removal and installation

Brush motor amperage check

1. Remove the brush.
2. Remove the recovery water tank.
   Warning! Do not touch uncovered electrical components while performing the following steps.
3. Apply the Amp clamp (A) on the battery cable (B).
4. Turn on the brush and check that the brush motor amperage is between 2 and 3 A at 24 V.

   Stop the brush rotation.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌​​⁠​​​‌​‍‍​‌​⁠‍‍‍​​⁠⁠‍⁠⁠​‌‍⁠‍‌‌⁠⁠‍​

   Remove the Amp clamp (A).

   If the amperage is higher, perform the following procedures to detect and correct the abnormal input:

   • Check that the brush hub is free from foreign materials (ropes, dirt, ...) preventing it from turning.
   • Check that the brush fuse (F1) is properly positioned
   • Check the condition of the brush motor carbon brushes
   • Remove the brush motor (see the procedure in the Brush Motor Disassembly/Assembly paragraph), and check the condition of all its components.

   If the above-mentioned procedures do not produce the correct readings for the brush motor amperage, the motor must be replaced (see the procedure in the Brush Motor Disassembly/Assembly paragraph).

Reassembly

5. Assemble the components in the reverse order of disassembly.

Corrected an obvious misprint: the sub-heading above step 5 is printed "Reset" (now Reassembly, since step 5 is the reassembly step, as on page 50).

Brush motor carbon brush check/replacement

Disassembly/check

1. Remove the brush motor (see the procedure in the Brush Motor Disassembly/Assembly paragraph).
2. Fasten the brush motor at the workbench.

   Note: Remove one carbon brush at a time, to avoid confusing their positions.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌​‌​​​​‌​‍‍​​⁠‌​​⁠⁠‌‍⁠​⁠‌⁠⁠‌‌⁠⁠‌⁠​​⁠

3. Remove the screw (A) of one of the four carbon brush assemblies (B).
4. Remove the carbon brush assembly (B) by disengaging the inner fasteners (C) and (D).
5. If necessary, remove the screw (E) and disconnect the electrical connection (F) from the carbon brush assembly.
6. Check the carbon brush (G) for wear. The carbon brush is worn when:
   • The contact with the motor armature is insufficient
   • The contact surface is not even
   • The stroke is less than 0.12 in (3 mm)
   • The thrust spring is broken, etc.
7. Remove and check the other carbon brush assemblies (B) by performing steps 3 to 6.
8. If necessary, disconnect the electrical connection (F) and remove the carbon brush assemblies to replace them.

   Replace the carbon brushes as an assembly. Parts ›

Assembly

9. Assemble the components in the reverse order of disassembly, and note the following:

   When fastening the electrical connections (F), take care of their insulation from the surrounding parts of the frame.

Brush deck disassembly/assembly

Disassembly

1. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
2. Remove the recovery water tank.
3. Loosen the fastener (A) and disconnect the hose (B) from the vacuum system motor below.
4. Remove the screws (C) and remove the cover (D).
5. On the brush motor (E) disengage the rubber caps (F), then disconnect the electrical connections (G) of the motor.

Brush deck disassembly/assembly (continues)

6. Remove the plugs (H) on the machine front sides and remove the screws below.
7. Lift the machine front side (I) and keep it lifted.
8. Loosen the screws (J) fastening the solution solenoid valve (K).
9. Move the solenoid valve (K) and disconnect the hose (L) from the solenoid valve by pulling it.
10. Recover the brush deck (M).

Assembly

11. Assemble the components in the reverse order of disassembly.

Brush motor disassembly/assembly

Disassembly

1. Remove the brush.
2. Place the machine on a hoisting system.
3. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
4. Remove the recovery water tank.
5. Loosen the fastener (A) and disconnect the hose (B) from the vacuum system motor below.
6. Remove the screws (C) and remove the cover (D).
7. On the brush motor (E), cut the fastening clamp (F) of the wiring harness (G).
8. Move the rubber caps (H) protecting the electrical connections (I).
9. Remove the nuts and disconnect the electrical connections (I) from the motor (E).

Brush motor disassembly/assembly (continues)

10. Lift the machine with the hoisting system; then let the brush hub (J) to protrude slightly from the edge of the hoisting system.
11. Remove the screw (K).
12. Remove the brush hub (J); if necessary use a sliding hammer puller (L).
13. Remove the brush motor fastening screws (M).
14. Lower the hoisting system, then remove the brush motor (E). Parts ›

Assembly

15. Assemble the components in the reverse order of disassembly.

Specifications

Scrub system, disc, cable version

Functional description

The disc brush system can be started by the operator. The disc brush turn counter-clockwise.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌​‍‍​​​‌​‍‍​‍​⁠‌​‌​‌⁠​‌‌​‍‌‌⁠‌​‍​⁠​​

The brush system, when turning, cleans/washes the floor surface and assist machine forward movement.

The deck, where brushes suitable for cleaning the particular type of floor are installed, is the main part of the brush system. The brush deck is fixed and integrated in the machine with a support plate. On the support plate, there are two handwheels to adjust the machine straight forward movement and speed.

The brush working pressure is functional to the machine designed balance.

The brush motor (M1) is supplied by the electromagnetic switch (ES1) which is driven by the fu switches (SW1) and (SW3 with SW4).

The system, once activated, uses the solution coming form the solution system, to wash the floor.

To work properly, the brush motor needs the following:

• Brush switch (SW1) turned on
• Push-buttons (SW3) pressed

Wiring diagram

Component location

Maintenance and adjustments

Brush cleaning

1. Drive the machine on a level floor and lift the brush/pad-holder deck. Make sure that the machine cannot move independently.
2. Check that the control panel switches are turned to “0”.
3. Remove the brush/pad-holder (A) according to the following procedure:
   • When the deck is lifted, grab the brush/pad-holder with the hands and turn it first in one direction (B) and then in the other direction (C) to release it.
4. Clean the brush with water and detergent.
5. Check the brush bristles for integrity and wear; if necessary, replace the brush. Parts ›
6. Install the brush.

Machine forward movement adjustment

Note: The machine speed and forward movement vary according to the type of floor to be cleaned and the choice of using the brush or the pad. If necessary, perform the following procedure.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌​⁠‌​​​‌​‍‍​⁠⁠‍‍⁠​‌‌⁠‍⁠‍‍‍‍​‍⁠‌​⁠‌​‍

1. Adjust the machine speed with the handwheel (A) according to the following procedure:
   • Turn it counter-clockwise to increase the machine speed.
   • Turn it clockwise to decrease the machine speed.
2. If it is difficult to keep the machine moving straight-forwardly because it deviates to the left or to the right, adjust the knob (B) by turning it clockwise or counter-clockwise.
3. With the machine ready to operate, perform hands-on tests of the machine speed; if necessary, perform step 2 again.

Troubleshooting

Removal and installation

Brush motor amperage check

1. Remove the brush.
2. Remove the recovery water tank.
   Warning! Do not touch uncovered electrical components while performing the following steps.
3. Apply the Amp clamp (A) on the battery cable (B).
4. Turn on the brush and check that the brush motor amperage is between 2 and 4 A at 230 Vac.

   Stop the brush rotation.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌​⁠⁠​​​‌​‍‍​‍​‍‍⁠‍​​‍‌⁠‍​​⁠​‍​⁠‌‍⁠‍⁠

   Remove the Amp clamp (A).

   If the amperage is higher, pes to detect and correct the abnormal input:

   • Check that the brush hub is free from foreign materials (ropes, dirt, ...) preventing it from turning.
   • Remove the brush motor (see the procedure in the Brush Motor Disassembly/Assembly paragraph), and check the condition of all its components.

   If the above-mentioned procedures do not produce the correct readings for the brush motor amperage, the motor must be replaced (see the procedure in the Brush Motor Disassembly/Assembly paragraph).

Reassembly

5. Assemble the components in the reverse order of disassembly.

Corrected an obvious misprint: the sub-heading above step 5 is printed "Reset" (now Reassembly, as on page 50). Also, step 3 says "battery cable" although this is the cable version, and the sentence "If the amperage is higher, pes to detect and correct the abnormal input" is garbled in the manual. Both are shown as printed.

Brush deck motor - capacitor wiring diagram (230V)

Internal wiring connections‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌‌​​​​​‌​‍‍​‍‍⁠⁠⁠‍‍⁠‍‍‍​​​​‍‌‌⁠‍‌‍‌‍

Specifications

Corrected an obvious misprint: brush motor power is printed "1.100 W" (now 1,100 W, as on page 19).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌‌​‌​​​‌​‍‍​​⁠​‌‍​⁠‌‌​​​⁠⁠‌​​​⁠‍‍​‍​

Solution system, battery version

Functional description

The solution system supplies the detergent to the brushes when cleaning the floor. The solution tank is also the main machine body. The detergent quantity is adjusted by the operator with the lever under the solution tank, on the left rear side. The solution flows from the tank to the tap, through the filter and solenoid valve (EV1) and then to the brush deck.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌‌​‍​​​‌​‍‍​⁠⁠​⁠‍⁠‍‌​‌‌‍⁠‍​‍⁠⁠‍​‍‌⁠‍

The solenoid valve (EV1) is supplied by the function electronic board (EB1) when the switches (SW1) and (SW3 with SW4) are closed. The circuit is protected by the control/solenoid fuse (F3) on the function electronic board (EB1). The solution flow is regulated by the manual solution flow control lever.

Wiring diagram

Component location

Maintenance and adjustments

Solution filter cleaning

1. Drain the solution tank.
2. Drive the machine on a level floor. Make sure that the machine cannot move independently.
3. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
4. On the machine lower side, in front of the left centre wheel, unscrew the transparent cover (A) with the gasket (B), then remove the filter strainer (C). Clean and install them on the support (D); install the gasket (B) and the filter strainer (C) properly on the cover (A) and on the support (D). Parts ›
5. Connect the battery connector (red).

Troubleshooting

Specifications

Solution system, cable version

Functional description

The solution system supplies the detergent to the brushes when cleaning the floor. The solution tank is also the main machine body. The detergent quantity is adjusted by the operator with the lever under the solution tank, on the left rear side. The solution flows from the tank to the tap, through the filter and solenoid valve (EV1) and then to the brush deck.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌‌‌‍​​​‌​‍‍​⁠‍‌​‍​‍​‍⁠‍​⁠⁠‍​‌​‌‌​⁠‌‌

The solenoid valve (EV1) is supplied by the brush motor relay (ES) when the switches (SW1) and (SW3 with SW4) are closed. The solution flow is regulated by the manual solution flow control lever.

Wiring diagram

Component location

Maintenance and adjustments

Solution filter cleaning

1. Drain the solution tank.
2. Drive the machine on a level floor. Make sure that the machine cannot move independently.
3. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
4. On the machine lower side, in front of the left centre wheel, unscrew the transparent cover (A) with the gasket (B), then remove the filter strainer (C). Clean and install them on the support (D); install the gasket (B) and the filter strainer (C) properly on the cover (A) and on the support (D). Parts ›
5. Connect the battery connector (red).

Troubleshooting

Specifications

Squeegee system

Functional description

Component location

Maintenance and adjustments

Squeegee cleaning

1. Drive the machine on a level floor. Make sure that the machine cannot move independently.
2. Check that the control panel switches are turned to “0”.
3. Lower the squeegee with the lever.
4. Disconnect the vacuum hose (A) from the squeegee (B).
5. Loosen the handwheels (C) and remove the squeegee (B).
6. Wash and clean the squeegee (B). In particular, clean the compartments (D) and the vacuum hole (E) from dirt and debris.
7. Check the front blade (F) and the rear blade (G) for integrity, cuts and tears; if necessary replace them (see the procedure in the following paragraph). Parts ›
8. Assemble the components in the reverse order of disassembly, and note the following:
9. If necessary, use the handwheel (H) to adjust the squeegee balance.

Step 8 ends with "note the following:" and nothing follows it in the manual; shown as printed.‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌‌⁠​​​​‌​‍‍​‍‌‌​​‌‌‍​​‌‌‍‍⁠​⁠⁠​​‍‍​‍

Squeegee blade check and replacement

1. Disassemble and clean the squeegee.
2. Check that the edge (A) of the front blade (B) and the edge (C) of the rear blade (D) lay down on the same level, along their length; otherwise adjust their height according to the following procedure:
   • Open the lever (E) and disengage the fasteners (F), then adjust the rear blade (D); after adjusting engage the fasteners (F) and close the lever (E).
   • Loosen the handwheels (G) and adjust the front blade (B); after adjusting tighten the handwheels (G).
3. Check that the front blade (B) and the rear blade (D) are integral and free from cuts and lacerations; if necessary replace them. Parts › Also check the front corner (H) of the rear blade (D) for wear; if it is worn, overturn the blade to replace the worn corner with the other one (I), if it is integral. If the other corner is worn too, replace the blade.
4. Assemble the squeegee.

Corrected an obvious misprint: in step 3 the front blade is printed "(C)" (now (B), as in step 2 on this page, where (C) is the edge of the rear blade).‌‌​⁠​⁠‌​‍‌‌⁠​⁠​⁠‌‍​‌​​​​‌‌⁠‌​​​‌​‍‍​⁠‍‌‍‌​⁠⁠‍‍​​‍​‍⁠​‍‍​⁠‌⁠‌

Troubleshooting

Removal and installation

Squeegee spring disassembly/assembly

Disassembly

1. Drive the machine to the appointed disposal area, and empty the recovery tank and the solution tank.
2. Check that the control panel switches are turned to “0”. Disconnect the battery connector (red).
3. Remove the recovery tank.
4. Remove the batteries.
5. Remove the squeegee (as shown in Squeegee Cleaning paragraph).
6. Remove the brush (as shown in Brush Cleaning paragraph).
7. With the help of an assistant, place the machine on a hoisting system (A) (or on a floor with a suitable step), overturned as shown in the figure; lay the machine front and central side (B) on the hoisting system (A) and let the rear side (C) free.
8. Remove the screw with the nut (D) and release the squeegee lifting cable (E).

Squeegee spring disassembly/assembly (continues)

9. Disconnect the solution valve (F), by pulling it.
10. Open the clamps (G) and move aside the hose (H).
11. Disengage the squeegee springs (I) from the bracket (J).
12. Release the retaining rings (K) and recover the springs (L) and the washers (M). Parts ›
13. Remove the right and left wheels (N) and (P). Parts ›
14. Remove the other components (Q); remove the wheel shaft (T) from its housing by tapping it with a plastic mallet (S).
15. Retrieve the squeegee springs (R). Parts ›

Assembly

16. Assemble the components in the reverse order of disassembly.

Specifications

Wheel system, non-traction

Component location

• Front wheels on fixed axle
• Rear parking wheel
• Machine in parking position

Specifications