Nilfisk SC401 Series User manual

SC401, SCRUBTEC 344

07/2018 (B) Form No. 9100002300

Service Manual

Advance Model Numbers:

9087394020 SC401 17 B

9087395020 SC401 17 BD

Nilsk Model Numbers:

9087391020 SC401 43 B

9087390020 SC401 43 B FULL PKG

9087392020 SC401 43 E

9087393020 SC401 43 BD

9087398020 SC401 43 BD FULL PKG

9087396020 SCRUBTEC 344 B COMBI

9087397020 SCRUBTEC 344 E

English

Contents iiService Manual – SC401, SCRUBTEC 344

Contents

03 - General Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Machine General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Service Manual Purpose and Field of Application . . . . . . . . . . . . . . . . . . . . . 7

Other Reference Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Name Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Visible Symbols on the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

General Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Lifting The Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Transporting The Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Technical Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Battery Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Cord Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Battery Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Cord Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Know Your Machine (Battery). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Control Panel View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Rear/Left Machine View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Front/Right Machine View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Know Your Machine (Cord) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Control Panel View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Rear/Left Machine View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Front/Right Machine View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Service and Diagnostic Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

04 - Control System - Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Functional Block Diagram (no Drive) . . . . . . . . . . . . . . . . . . . . . . . . . .30

Functional Block Diagram (Drive) . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Parameter Machine Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

General System Fault Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Main Machine Controller (EB1). . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

User Interface Controller (EB2) and Operator’s Presence Sensors (S1, S2) . . . . .44

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Main Machine Controller (EB1) Connectors . . . . . . . . . . . . . . . . . . . . . .46

User Interface Controller (EB2) Connectors . . . . . . . . . . . . . . . . . . . . . .53

Shop Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Main Machine Controller (EB1) . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

User Interface Controller (EB2). . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Contents iiiService Manual – SC401, SCRUBTEC 344

05 - Control System - Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Parameter Machine Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Main Machine Controller (EB1). . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

User Interface Controller (EB2) and Operator’s Presence Sensors (S1, S2) . . . . .75

Operator’s Presence Sensors (S1, S2). . . . . . . . . . . . . . . . . . . . . . . .76

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Main Machine Controller (EB1) Connectors . . . . . . . . . . . . . . . . . . . . . .77

User Interface Controller (EB2) Connectors . . . . . . . . . . . . . . . . . . . . . .82

10 - Chassis System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Chassis (Main Parts) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

14 - Wheel System, Non-Traction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

20 - Wheel System, Traction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Drive Motor Clenanig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Drive Wheels Controller (EB3) Parameters . . . . . . . . . . . . . . . . . . . . . .91

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Drive Wheels Controller (EB3) Alarms . . . . . . . . . . . . . . . . . . . . . . . . .94

Drive System Gear Motor Current Draw Test . . . . . . . . . . . . . . . . . . . . . 96

Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Drive Wheels Controller (EB3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Drive System Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101

Drive Wheels Controller (EB3) Connectors. . . . . . . . . . . . . . . . . . . . . .101

Shop Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Drive Wheels Controller (EB3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Contents ivService Manual – SC401, SCRUBTEC 344

24 - Electrical System (Battery). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Battery Charge State Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Setting the Installed Battery Type . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Battery Charger Setting and Dipswitches Conguration . . . . . . . . . . . . . . 111

Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Checking/Replacing Relay or Fuses . . . . . . . . . . . . . . . . . . . . . . . . . .116

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Complete Wiring Diagram (Battery no Drive) . . . . . . . . . . . . . . . . . . . . . . 118

Complete Wiring Diagram (Battery Drive) . . . . . . . . . . . . . . . . . . . . . . . . 119

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

24 - Electrical System (Cord) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Complete Wiring Diagram (Cord) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

30 - Solution System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125

Pre Wetted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Adjusting of Detergent Concentration in the Washing Water . . . . . . . . . . . . 126

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Cleaning the Water Tank and Filter . . . . . . . . . . . . . . . . . . . . . . . . . 130

Detergent Tank and Detergent System Cleaning . . . . . . . . . . . . . . . . . . 131

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

34 - Scrub System, Disc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136

Brush Engage and Release System . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Brush Engagement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Brush Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Brush Motor ANTISPLASHING System . . . . . . . . . . . . . . . . . . . . . . . 137

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Brush or Pad-Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Brush Motor Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Brush Motor Current Draw Test . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Brush Deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Brush Motor Carbon Brushes Checking/Replacing . . . . . . . . . . . . . . . . . 146

Brush Motor Disassembly/Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 147

Starting Capacitor Replacing (Cord Model) . . . . . . . . . . . . . . . . . . . . . 148

Capacitor Run Replacing (Cord Model) . . . . . . . . . . . . . . . . . . . . . . . . 149

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150

Contents vService Manual – SC401, SCRUBTEC 344

38 - Squeegee System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Squeegee Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Checking/Replacing the Squeegee Blades . . . . . . . . . . . . . . . . . . . . . . 154

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Spring on the Squeegee Support . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157

40 - Recovery System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158

Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Recovery Tank Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Vacuum Motor Current Draw Test . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Vacuum Motor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Container and Vacuum Motor Disassembly/Assembly. . . . . . . . . . . . . . . . 165

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170

90 - Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

6Service Manual – SC401, SCRUBTEC 344

03 - General Information

Machine General Description

The SC401, SCRUBTEC 344 is a “walk-behind” scrubber industrial machine designed to wash and dry oors

in one pass. The machine is powered by on-board batteries or cord power supply. The machine features a

oor disc brush, controlled detergent solution dosing and a rear squeegee with rubber blades that vacuums

and dries the oor.

Figure 1:

Drive handlebar

Recovery tank

Detergent bottle

Vacumm system

Solution tank

Squeegee Solution system

Brush deck

Brush

7Service Manual – SC401, SCRUBTEC 344 03 - General Information

Service Manual Purpose and Field of Application

The Service Manual is a technical resource intended to help service technicians when carrying out

maintenance and repairs on the scrubbers, to guarantee the best cleaning performance and a long working

life for the machine.

Please read this manual carefully before performing any maintenance and repair procedure on the machine.

Other Reference Manuals

Model Model No. Instructions for Use Spare Parts List

Advance SC401 17 B 9087394020 9100002290 9100002293

Advance SC401 17 BD 9087395020

Nilsk SC401 17 B FULL PKG 9087390020

9100002291 9100002294

Nilsk SC401 17 B 9087391020

Nilsk SC401 17 BD 9087393020

Nilsk SC401 17 BD FULL PKG 9087398020

Nilsk SCRUBTEC 344 B COMBI 9087396020

Nilsk SC401 17 E 9087392020 9100002292 9100002295

Nilsk SCRUBTEC 344 E 9087397020

Assembly Instructions Instruction Code Machines concerned

Key Kit 9100002549 Nilsk Battery

Detergent Kit 9100002550 Nilsk Battery

Battery charger kit 9100002551 Nilsk Battery

Counter hour 24V KIT 9100002547 Advance / Nilsk Battery

USB port kit 9100002548 Advance / Nilsk Battery

Trackclean kit 9100002586 Advance / Nilsk Battery

These manuals are available at:

• Local Advance or Nilsk retailer

• Advance website: www.advance-us.com

• Nilsk website: www.nilsk.com

• EZ-Data application

8Service Manual – SC401, SCRUBTEC 344 03 - General Information

Conventions

Forward, backward, front, rear, left or right are intended with reference to the operator’s position, that is to

say in driving position.

Name Plate

Reference to Figure 2

The machine serial number and model name

are marked on the plate (see the example to the

side).

Model number and year of production (Date

code: A18, as January 2018) are marked on the

same plate.

Figure 2:

9Service Manual – SC401, SCRUBTEC 344 03 - General Information

Safety

The following symbols indicate potentially dangerous situations. Always read this information carefully and

take all necessary precautions to safeguard people and property.

Visible Symbols on the Machine

WARNING: Carefully read all the instructions before performing any operation on the

machine.

WARNING: Do not wash the machine with direct or pressurized water jets.

max.2%

WARNING: Do not use the machine on slopes with a gradient exceeding the

specications.

Symbols

The following symbols are used to help you recognize the information concerning the safety and the

prevention of problems.

DANGER: Indicates a potentially hazardous situation which, if not avoided, will result in death or

serious injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death

or serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, could result in minor

or moderate injury.

Note: Indicates an important informational message.

10Service Manual – SC401, SCRUBTEC 344 03 - General Information

General Safety Instructions

Specic warnings and cautions to inform about potential damages to people and machine are shown below.

DANGER: BATTERY MODELS

−Before performing any machine maintenance, repair, cleaning or replacement

procedure, disconnect the battery connector and remove the ignition key (if equipped).

−When using lead (WET) batteries, keep sparks, ames and smoking materials away

from the batteries. During the normal operation explosive gases are released.

−When using lead (WET) batteries, battery charging produces highly explosive

hydrogen gas. During battery charging, lift the recovery tank and perform this

procedure in well-ventilated areas and away from naked ames.

DANGER: CORD MODELS

−Before performing any maintenance, repair, cleaning or replacement procedure

disconnect the plug from the electrical mains.

DANGER: ALL MODELS

−This machine must be used by properly trained operators only.

−Do not wear jewels when working near electrical components.

−Do not work under the lifted machine without supporting it with safety stands.

−Do not operate the machine near toxic, dangerous, ammable and/or explosive

powders, liquids or vapours. This machine is not suitable for collecting dangerous

powders.

CAUTION: BATTERY MODELS

−Before using the battery charger, ensure that frequency and voltage values, indicated

on the machine serial number plate, match the electrical mains voltage.

−Do not pull or carry the machine by the battery charger cable and never use the battery

charger cable as a handle. Do not close a door on the battery charger cable, or pull the

battery charger cable around sharp edges or corners. Do not run the machine on the

battery charger cable.

−Keep the battery charger cable away from heated surfaces.

−Do not charge the batteries if the battery charger cable or the plug are damaged. If the

machine is not working as it should, has been damaged, left outdoors or dropped into

water, return it to the Service Center.

−To reduce the risk of re, electric shock, or injury, do not leave the machine

unattended when it is plugged in. Before performing any maintenance procedure,

disconnect the battery charger cable from the electrical mains.

−Do not smoke while charging the batteries.

−To avoid any unauthorized use of the machine, remove the ignition key.

−Do not leave the machine unattended without being sure that it cannot move

independently.

−(Only for machines with drive system): When the machine is to be pushed for service

reasons (missing or discharged batteries, etc.), the speed must not exceed 4 km/h.

11Service Manual – SC401, SCRUBTEC 344 03 - General Information

CAUTION: CORD MODELS

−The machine power supply cable is grounded and the relevant plug is grounded too. In

case of machine malfunction or breakdown, grounding connection reduces the risk of

electric shock.

−The power supply cable plug must be connected to an appropriate outlet, which is

grounded according to law in force.

−Improper connection can cause electric shock. Consult a qualied technician to make

sure that the outlet is properly grounded.

−Do not tamper with the power supply cable plug. If the power supply cable plug

cannot be connected to the outlet, have new grounded outlet installed by a qualied

technician, according to the law in force.

−Before connecting the power supply plug to the electrical mains, check that frequency

and voltage, shown on the machine serial number plate (29), match the electrical

mains voltage.

−Do not unplug the machine by pulling the supply cable. To unplug, grasp the plug, not

the cable.

−Do not handle the plug or the machine with wet hands.

−Turn o all controls before unplugging.

−Regularly check the power supply cable for damages, cuts, cracks and wear. If

necessary, replace it.

−If the power supply cable is damaged, it must be replaced by the Manufacturer or by an

authorised Service Centre.

−Do not pull or carry the machine by the power supply cable and never use the power

supply cable as a handle. Do not close a door on the power supply cable, or pull the

power supply cable around sharp edges or corners. Do not run the machine on the

power supply cable.

−The rotating brush must not come into contact with the power supply cable.

−Keep the supply cable away from heated surfaces.

−To reduce the risk of re, electric shock, or injury, do not leave the machine

unattended when it is plugged in. Disconnect the machine from the electrical mains

when not in use and before performing maintenance procedures.

−If the machine:

− Does not work properly

− Is damaged

− Has water or foam leaks

− Has been left outdoors exposed to bad weather conditions

− Is wet or has been dropped into water,

−turn it o immediately and contact the Nilsk Service Center or a qualied technician.

12Service Manual – SC401, SCRUBTEC 344 03 - General Information

CAUTION: ALL MODELS

−Carefully read all the instructions before performing any maintenance/repair

procedure.

−This machine is not intended for use by persons (including children) with reduced

physical, sensory or mental capabilities, or lack of experience and knowledge, unless

they have been given supervision or instruction concerning use of the machine by a

person responsible for they safety.

−Children should be supervised to ensure that they do not play with the machine.

−Close attention is necessary when used near children.

−Always protect the machine against the sun, rain and bad weather, both under

operation and inactivity condition. This machine must be used indoors in dry

conditions, it must not be used or kept outdoors in wet conditions.

−Before using the machine, close all doors and/or covers as shown in the Instructions

for Use Manual.

− Use only as shown in this Manual. Use only Nilsk’s recommended accessories.

−Check the machine carefully before each use, always check that all the components

have been properly assembled before use. If the machine is not perfectly assembled it

can cause damages to people and properties.

−Take all necessary precautions to prevent hair, jewels and loose clothes from being

caught by the machine moving parts.

−Do not use the machine on slopes.

−Do not tilt the machine more than the angle indicated on the machine itself, in order to

prevent instability.

−Do not use the machine in particularly dusty areas.

−Use the machine only where a proper lighting is provided.

−While using this machine, take care not to cause damage to people or objects.

−Do not bump into shelves or scaoldings, especially where there is a risk of falling

objects.

−Do not lean liquid containers on the machine, use the relevant can holder.

−The machine working temperature must be between +32 °F and +104 °F (0 °C and +40

°C).

−The machine storage temperature must be between +32 °F and +104 °F (0 °C and +40

°C).

−The humidity must be between 30 % and 95 %.

−When using oor cleaning detergents, follow the instructions on the labels of the

detergent bottles.

−To handle oor cleaning detergents, wear suitable gloves and protections.

−Do not use the machine as a means of transport.

−Do not allow the brush to operate while the machine is stationary to avoid damaging

the oor.

13Service Manual – SC401, SCRUBTEC 344 03 - General Information

−In case of re, use a powder re extinguisher, not a water one.

−Do not tamper with the machine safety guards and follow the ordinary maintenance

instructions scrupulously.

−Do not allow any object to enter into the openings. Do not use the machine if the

openings are clogged. Always keep the openings free from dust, hairs and any other

foreign material which could reduce the air ow.

−Do not remove or modify the plates axed to the machine.

−This machine cannot be used on roads or public streets.

−Pay attention during machine transportation when temperature is below freezing point.

The water in the recovery tank or in the hoses could freeze and seriously damage the

machine.

−Use only the brushes supplied with the machine or those specied in the Instructions

for Use Manual. Using other brushes could reduce safety.

−In case of machine malfunctions, ensure that these are not due to lack of maintenance.

If necessary, request assistance from the authorised personnel or from an authorised

Service Center.

−If parts must be replaced, require ORIGINAL spare parts from an Authorised Dealer or

Retailer.

−To ensure machine proper and safe operation, the scheduled maintenance shown in

the relevant chapter of this Manual, must be performed by the authorised personnel or

by an authorised Service Center.

−Do not wash the machine with direct or pressurised water jets, or with corrosive

substances.

−The machine must be disposed of properly, because of the presence of toxic-harmful

materials (batteries, etc.), which are subject to standards that require disposal in

special centres.

14Service Manual – SC401, SCRUBTEC 344 03 - General Information

Lifting The Machine

WARNING: Do not work under the lifted machine without supporting it with safety stands.

Transporting The Machine

WARNING: Before transporting the machine, make sure that:

−All covers are closed.

−The recovery tank and the detergent tank are empty.

−The batteries are disconnected.

−The ignition key is removed.

−The machine is securely fastened to the means of transport.

15Service Manual – SC401, SCRUBTEC 344 03 - General Information

Technical Specications

Battery Models

Model SC401, SCRUBTEC 344

No Drive Drive

Solution tank capacity 7,9 US gal (30 liters)

Recovery tank capacity 7,9 US gal (30 liters)

Machine length 46,5 in (1.180 mm)

Machine width with squeegee 28 in (720 mm)

Machine width without squeegee 18 in (458 mm)

Machine height 41,5 in (1.055 mm)

Cleaning width 17 in (430 mm)

Deck right/left oset 1,8 in / 0 in (45 mm / 0 mm)

Front wheel diameter 7,8 in (200 mm)

Front wheel specic pressure on the oor (*) 116 psi (0,8 N/mm2)

Rear wheel diameter 3,1 in (80 mm)

Rear wheel specic pressure on the oor (*) 290 psi (2,0 N/mm2)

Brush/pad diameter 17 in (430 mm)

Brush pressure 55 lb (25 kg)

Solution ow values 0,08 - 0,18 - 0,53 gpm (0,3 / 0,7 / 2,0 L/m)

Detergent bottle capacity 0,26 US gal (1 liters)

Detergent System detergent percentage 0,25 ÷ 2,0 %

Sound pressure level at workstation (ISO 11201, ISO 4871, EN

60335-2-72) (LpA) 65 ±3 dB(A)

Sound pressure level at workstation in silent mode (LpA) 60 ±3 dB(A)

Machine sound power level (guaranteed value ISO 3744, ISO

4871, EN 60335-2-72) (LwA) 80 dB(A)

Vibration level at the operator’s arms (ISO 5349-1, EN 60335-2-

72) < 98 in/s2 (< 2,5 m/s2)

Maximum gradient when working 2 %

Drive system motor power -0.2 hp (150 W)

Drive speed (variable) -0 ÷ 3 , 1 m i / h

(0 ÷ 5 km/h)

Vacuum system motor power 0,4 hp (280 W)

Vacuum system circuit capacity 35,4 in H2O (900 mm H2O)

Brush motor power 0,6 hp (450 W)

Brush motor speed 140 rpm

16Service Manual – SC401, SCRUBTEC 344 03 - General Information

Model SC401, SCRUBTEC 344

No Drive Drive

Total power draw (EN 60335-2-72) 21 A (0,5 kW) 25 A (0,6 kW)

IP protection class X4

Protection class (electric) III (I for on board battery charger)

Battery compartment size 13,8 x 13,8 x 10,2 in (350 x 350 x 260 mm)

System voltage 24V

Standard batteries (q.ty 2)

Advance: 98 Ah C20 GEL / 105 Ah C20 WET

Nilsk: 12V-76 Ah GEL MONOBLOC

Battery charger -24V 10A

Operating time (standard batteries) (EN 60335-2-72) 2,6 h 2,4 h

Weight without batteries and with empty tanks 134 lb (61 kg) 161 lb (73kg)

Gross vehicle weight (GVW) 333 lb (151 kg) 359 lb (163 kg)

Shipping weight (basic / full package)

214 lb (97 kg)

340 lb (154 kg)

240 lb (109 kg)

366 lb (166 kg)

(*) Machines have been tested under the following conditions:

◦Battery maximum size

◦Maximum brush and squeegee size

◦Full detergent tank

◦Optional equipment installed

◦Wheel weight checked

◦ Print on the oor checked on cement for each single wheel

◦Result expressed as maximum value for both front and rear wheels

17Service Manual – SC401, SCRUBTEC 344 03 - General Information

Cord Models

Model SC401, SCRUBTEC 344

Solution tank capacity 7,9 US gal (30 liters)

Recovery tank capacity 7,9 US gal (30 liters)

Machine length 46,4 in (1.180 mm)

Machine width with squeegee 28,3 in (720 mm)

Machine width without squeegee 18 in (458 mm)

Machine height 41,5 in (1.055 mm)

Cleaning width 17 in (430 mm)

Deck right/left oset 1,8 in / 0 in (45 mm / 0 mm)

Front wheel diameter 7,9 in (200 mm)

Front wheel specic pressure on the oor (*) 116 psi (0,8 N/mm2)

Rear wheel diameter 3,1 in (80 mm)

Rear wheel specic pressure on the oor (*) 290 psi (2,0 N/mm2)

Brush/pad diameter 17 in (430 mm)

Brush pressure 66 lb (30 kg)

Solution ow values 0,08 / 0,18 / 0,53 gpm (0,3 / 0,7 / 2,0 L/m)

Sound pressure level at workstation (ISO 11201, ISO 4871, EN

60335-2-72) (LpA) 68 ±3 dB(A)

Machine sound power level (ISO 3744, ISO 4871, EN 60335-2-

72) (LwA) 87 dB(A)

Vibration level at the operator’s arms (ISO 5349-1, EN 60335-2-

72) < 98 in/s2 (< 2,5 m/s2)

Maximum gradient when working 2 %

Vacuum system motor power 0,4 hp (280 W)

Vacuum system circuit capacity 35,4 in H2O (900 mm H2O)

Brush motor power 1 hp (750 W)

Brush motor speed 170 rpm

Total power draw (EN 60335-2-72) 4,3 A (1,0 kW)

IP protection class X4

Protection class (electric) I

Power supply 230 V - 50-60 Hz

Weight with empty tanks 247 lb (112 kg)

Gross vehicle weight (GVW) 317 lb (144 kg)

Shipping weight 326 lb (148 kg)

(*) Machines have been tested under the following conditions:

◦Maximum brush and squeegee size

◦Full detergent tank

◦Optional equipment installed

◦Wheel weight checked

◦ Print on the oor checked on cement for each single wheel

◦Result expressed as maximum value for both front and rear wheels

18Service Manual – SC401, SCRUBTEC 344 03 - General Information

Maintenance Schedule

Battery Models

Procedure Daily,

after use Weekly/

Monthly Every 6

Months Annually

Battery Charging

Squeegee Cleaning

Brush/pad cleaning

Recovery tank, debris tray, and vacuum grid with

oat cleaning, and cover gasket check

Detergent System cleaning and washing

Squeegee blade check

Solution Filter Cleaning

Battery (WET) uid level check

Squeegee blade replacement

Drive and brush motor check and cleaning

Brush motor carbon brush check or replacement

Cord Models

Procedure Daily,

after use Weekly/

Monthly Every 6

Months Annually

Squeegee Cleaning

Brush/pad cleaning

Recovery tank, debris tray, and vacuum grid with

oat cleaning, and cover gasket check

Power supply cable check

Squeegee blade check

Solution Filter Cleaning

Squeegee blade replacement

19Service Manual – SC401, SCRUBTEC 344 03 - General Information

Know Your Machine (Battery)

Control Panel View

Figure 3:

Operator’s presence

sensors

Reverse gear switch

(only for drive version)

Operator’s presence

sensors

Ignition key (0 - I) (standard

for drive version)

Vacuum system button

Battery level Led’s

Main machine start and

stop button

USB port

Solution button (3 level)

Speed adjuster (only for

drive version)

Hour counter

Battery charger inspection

window

20Service Manual – SC401, SCRUBTEC 344 03 - General Information

Rear/Left Machine View

Figure 4:

Front wheels

Brush deck

lifting/lowering

pedal

Tank lifting

handle

Solution drain

and level check

hose

Squeegee lifting/

lowering pedal

Drive handlebar

Control panel

Recovery water

drain hose

Battery charger

cable

Battery charger

cable housing

and document

holder

Serial number

plate/technical

data/conformity

certication

Battery

connector (red)

Squeegee

adjusting knob

Squeegee

mounting

handwheels

Recovery tank

cover

Recovery tank

Squeegee

vacuum hose

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