Speed Scrub 24 32 Service Manual Nobles Ss5 Walk Behind Floor Scrubber

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SS5 Service Information Manual

SERVICE INFORMATION MANUAL

9002377

Rev. 01 (09-2006)

AUTOMATIC SCRUBBER

*9002377*

The Safe Scrubbing Alternativer

Quick- Train

Controls

www.nobles.com

SPEED SCRUB

FOR REPLACEMENT PARTS

Identify machine model and serial number.

1. (A) Identify the machine model.

2. (B) Identify the machine serial number from the data label.

Refer to the NOBLES Speed Scrub Parts Manual.

NOTE: Only use NOBLES supplied or equivalent parts. Parts and supplies may be ordered

online, by phone, by fax or by mail.

Tennant Company

PO Box 1452

Minneapolis, MN 55440

Phone: (800) 553--8033 or (763) 513--2850

www.nobles.com

FaST--PAK is a US registered and unregistered trademark of Tennant Company.

Specifications and parts are subject to change without notice.

Nobles Speed Scrub 9002377 REV.00 (08-06)

page

MACHINE INFORMATION

Component Locator……………………….…...……………………………..…

…

Machine Specifications………...…………………….…………………………

…

MAINTENANCE

SAFETY LABELS………………………..………………………………………

…

BATTERY INSTALLATION………………………………………………………

…

SQUEEGEE REMOVAL & INSTALLATION…………………………………… 8

CIRCUIT BREAKERS & FUSES………………………………………………

…

CHARGING BATTERIES………………………..………………………………

…

Battery Charger Specifications…………………………….……………...9

On-Board Batter

Char

er Settin

s……………………………………… 9

Usin

the On-Board Batter

Char

er……………………………………

…

On-Board Batter

Char

er Error Codes…………………………………

…

Usin

an Off-Board Batter

Char

er……………………………………

…

ADJUSTING SCRUB HEAD BRUSHES………………………………………

…

Disk Brush Model………………...………………………………………. 12

lindrical Brush Model……………………………………..……………

…

ustin

an Uneven Brush Pattern………………………………

…

ustin

a Ta

ered Brush Pattern………………………………

…

MACHINE MAINTENANCE……………………………………………..………

…

Dail

Maintenance…………………………………………..……………

…

Monthl

Maintenance………………………………….…………………

…

Batter

Maintenance……………...………..……………………………… 17

uee

ee Blades……………………….…………………...……………

…

Motor Maintenance……………………………………….………………

…

FaST S

stem Maintenance……………………………………….………

…

JACKING UP MACHINE……………………….……...…………………………

…

TRANSPORTING MACHINE…………………….……………...………………

…

STORING MACHINE………………………………………...…..………………

…

FaST S

stem Freeze Protection……………..……………………...……19

RECOMMENDED STOCK ITEMS……………..……………….………………

…

BASIC TROUBLESHOOTING……………………….…………………………

…

ELECTRICAL

Electrical Schematic…………………………...…..…………………..…………

…

Wirin

Harness Detail………………………...………………..…………………

…

Control Board & BDI Details……………………………………………………

…

Control Board & BDI Pin Charts…………………………………………………

…

BDI Dia

nostic Fault Indicators…………………………………………………

…

Electrical S

mbols & Terms…………………………...……………..…………

…

OFF Power Distribution

(

Off-Board Char

er Disconnected

)

……………

…

OFF Power Distribution

(

Off-Board Char

er Connected

)

………………

…

OFF Power Distribution

(

On-Board Char

er Disconnected

)

……………

…

OFF Power Distribution

(

On-Board Char

er Connected

)

………………

…

ON Power Distribution………………….………….………………………

…

Pro

el Forward S

stem…………………………...………………………………39

Propel Reverse System………………………………………………………….. 40

Scrub Brushes……………………...…………………………..…………………

…

Vacuum Fan S

stem…………………………..………………..………………..

…

Conventional Solution Solenoid Valve & Hour Meter…………………………

…

FaST Pum

& Hour Meter………………………………………………………

…

Scrub Head Actuator LOWER

(

Extend

)

……………………………….………

…

Scrub Head Actuator RAISE

(

Retract

)

…………………………………………

…

Wand Pum

…………………………….…………………………………………

…

Speed Scrub Service Information Manual

Table of Contents

Nobles Speed Scrub 9002377 REV.00 (08-06)

iii

Speed Scrub Service Information Manual

BEFORE CONDUCTING TESTS:

z Read and Follow ALL Safety Warnings and Precautions in Operator's

Manual

z Always use an ESD (Electrostatic Discharge) strap when working near

the Control Board

z Be cautious when working near Control Board – Battery voltage is

always present, even with Key OFF

z Always Disconnect Batteries when removing or replacing components

DURING TESTS:

z Call Technical Services if Diagnostic Time Exceeds One Hour with

Unknown Cause or Course of Action

! !

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub Component Locator

(Page 1 of 4)

911

1. Battery Meter (Battery Discharge Indicator)

2. Reverse Trigger

3. Start Triggers (Propel/Scrub)

4. Brush Pressure Meter

5. Control Console Height Adjustment Lever

6. Speed Control Knob (Potentiometer)

7. Brush Pressure Switch

8. Off--Aisle Wand on/off Switch (option)

9. FaST System on/off Switch (option)

10. Main Power on/off Key Switch

11. Hour Meter

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub Component Locato

(Page 2 of 4)

FRONT

BOTTOM

VIEW

FRONT

VACUUM FAN

MOTOR M3

RECOVERY TANK

INTERLOCK SWITCH

CONTROL BOARD AND

CIRCUIT BREAKERS

PROPEL MOTOR M4

FRONT

BOTTOM

VIEW

FaST PUMP MOTOR M6

FRONT

Speed Scrub Component Locato

(Page 3 of 4)

CYLINDRICAL SCRUB

BRUSH MOTORS

DISK SCRUB

BRUSH MOTORS

SCRUB HEAD ACTUATOR M5 SCRUB HEAD ACTUATOR M5

ACTUATOR SCRUB/TRANSPORT SWITCH

ACTUATOR RAISE LIMIT SWITCH

ACTUATOR LOWER LIMIT SWITCH

MOTOR

M1 MOTOR

MOTOR

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub Component Locato

(Page 4 of 4)

VACUUM FAN

SWITCH

CHARGER

INTERLOCK

SWITCH

(OFF-BOARD

CHARGER)

CONVENTIONAL

SOLENOID VALVE

ON-BOARD CHARGER

CONTROL BOARD, FUSE, & CIRCUIT BREAKERS

STANDOFF

BRUSH

CONTACTOR

CR1

STANDOFF

100A FUSE F1

CIRCUIT

BREAKERS

CONTROL BOARD

CB4

10A RELAYS

CB1

25A

CB2

25A

CB3

25A

CR2

CR4

CR3

Nobles Speed Scrub (08--06)

MACHINE SPECIFICATIONS

MODEL Disk,

24 in / 600mm

Disk,

28 in / 700mm

Disk,

32 in / 800mm

Cylindrical,

26 in / 650mm

Cylindrical,

32 in / 800mm

LENGTH 53.4 in / 1,357 mm 55.5 in / 1,408 mm 58 in / 1,471 mm 55 in / 1,399 mm 55 in / 1,399 mm

WIDTH 25.4 in / 645 mm 29 in / 737 mm 33 in / 838 mm 28 in / 711 mm 34 in / 864 mm

HEIGHT 44 in / 1120 mm

MINIMUM AISLE TURN 53 in / 1,346 mm 59 in / 1,499 mm 64 in / 1,626 mm 62 in / 1,575 mm 64.5 in / 1,638 mm

WEIGHT 293 lb / 133 kg 320 lb / 145 kg 332 lb / 151 kg 332 lb / 151 kg 342 lb / 155 kg

WEIGHT WITH BATTERIES 569 lb / 258 kg 593 lb / 269 kg 606 lb / 275 kg 606 lb / 275 kg 615 lb / 279 kg

RECOVERY TANK CAPACITY 27 gal / 105 L

SOLUTION TANK CAPACITY 22.5 gal / 85 L

DRIVE SYSTEM Transaxle, 24 V, .25 hp / .19 kW

TRAVEL SPEED, MAXIMUM Cleaning: 220 ft / 67 m per min Transporting: 235 ft / 72 m per min

PRODUCTIVITY RATE

Theoretical

26,400 ft2/

2,450 m2h

30,800 ft2/

2,860 m2h

35,200 ft2/

3,270 m2h

28,600 ft2/

2,660 m2h

35,200 ft2/

3,270 m2h

PRODUCTIVITY RATE

Estimated Actual

17,875 ft2/

1,660 m2h

20,800 ft2/

1,930 m2h

24,000 ft2/

2,230 m2h

19,200 ft2/

1,785 m2h

24,000 ft2/

2,230 m2h

CLEANING PATH WIDTH 24 in / 600 mm 28 in / 700 mm 32 in / 800 mm 26 in / 650 mm 32 in / 800 mm

BRUSH DIAMETER 11.9 in / 302 mm 13.9 in / 353 mm 15.9 in / 404 mm 5.9 in / 151 mm 5.9 in / 151 mm

BRUSH PRESSURE up to 120 lb / 54 kg

SOLUTION FLOW RATE .5 gpm /

1.89 L/min .50 gpm / 1.89 L/min .6 gpm /

2.27 L/min

.6 gpm /

2.27 L/min

SQUEEGEE WIDTH 35.7 in / 908 mm

standard

41.3 in / 1,051 mm

standard

46.6 in / 1,185 mm

standard

41.3 in / 1,051 mm

standard

46.6 in / 1,185 mm

standard

31.5 in / 800 mm

narrow aisle

35.7 in / 908 mm

narrow aisle

41.3 in / 1,051 mm

narrow aisle

35.7 in / 908 mm

narrow aisle

41.3 in / 1,051 mm

narrow aisle

BRUSH MOTOR Qty 2, .75 hp / .55 kW, 220 rpm, 24 V, 29 A Qty 2, .63 hp / .47 kW, 1500 rpm,

24 V, 23 A

VACUUM MOTOR .85 hp / .63 kW, 640 W, 3--stage 5.7, 24 V, 26 A

WATER LIFT -- AIR FLOW 62in/55mm--69ft

3/ 32.4 L3/m

BATTERIES Qty 4, 6 V

BATTERY CAPACITY WET (lead Acid) = 235 Ah @ 20 h rate Sealed (Gel)= 200 Ah @ 20 h rate

RUN TIME PER CHARGE* WET = Up to 5.0 hours Gel = Up to 4.0 hours

ON--BOARD CHARGER 120 VAC, 10 A, 50/60 Hz, 24 VDC, 20 A output

TOTAL POWER CONSUMPTION 50 A nominal

VOLTAGE DC 24 VDC

PROTECTION GRADE IPX3

DECIBEL RATING AT OPERA-

TOR’S EAR, INDOORS.** 67dBA 68dBA

VIBRATION AT CONTROLS <.39 ft/s2/ <.1188 m/s2<.34 ft/s2/ <.103 m/s2

ACCELERATION RATE ON

OPERATOR -- MAX. .56ft/.179m/s

GRADE LEVEL, MAX. Scrubbing 5% (3°), Transporting 8% (5°)

* Run times are based on Continuous Scrubbing Run Times.

** Sound levels (ISO 11201) as recommended by the American Association of Cleaning Equipment Manufacturers (AACEM) and OSHA.

Nobles Speed Scrub 9002377 REV.00 (08-06)

FaST SYSTEM Disk,

24 in / 600mm

Disk,

28 in / 700mm

Disk,

32 in / 800mm

Cylindrical,

26 in / 650mm

Cylindrical,

32 in / 800mm

PRODUCTIVITY RATE

Estimated Actual

20,075ft2/

1,865m2/h

22,750ft2/

2115m2/h

26,250ft2/

2440m2/h

21,000ft2/

1950m2/h

26,250ft2/

2440m2/h

SOLUTION PUMP 24 Volt DC, 3.5 A, 1.5 gpm / 5.6 L/min open flow, 60 psi / 4.13 Bar bypass setting

SOLUTION FLOW RATE 0.15 gpm /

0.57 L/min 0.22 gpm / 0.83 L/min.

0.15 gpm /

0.57 L/min.

0.22 gpm /

0.83 L/min.

CONCENTRATE FLOW RATE 0.0193oz /

0.57CC /min. 0.028oz / 0.83CC /min. 0.0193oz /

0.57CC /min.

0.028oz /

0.83CC /min.

CONCENTRATE TO WATER

DILUTION RATIO 1:1000

MACHINE DIMENSIONS

44 in

1,120 mm

Models: 24 in / 600 mm 28 in / 700 mm 32 in / 800 mm 26 in / 650 mm 28 in / 800 mm

Disk Disk Disk Cylindrical Cylindrical

A= 53.4 in / 1,357 mm 55.5 in / 1,408 mm 58 in / 1,471 mm 55 in / 1,399 mm 55 in / 1,399 mm

B= 25.4 in / 645 mm 29 in / 737 mm 33 in / 838 mm 28 in / 711 mm 34 in / 864 mm

C= 35.7 in / 908 mm 41.3 in / 1,051 mm 46.6 in / 1,185 mm 41.3 in / 1,051 mm 46.6 in / 1,185 mm

Nobles Speed Scrub 9002377 REV.00 (08-06)

Commonly Used Electrical Symbols & Terms

Battery Fuse

Normally Closed

Push-Button Switch

Normally Open

Switch

CR1

Relay Coil

(Part 1 of Relay)

Circuit Breaker

Motor

Wires Connected

Together

Normally Open

Push-Button Switch

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

Example of Wiring Numbers & Colors:

1 RED 25 7 13 BLK

Normally Open

Limit Switch

Normally Closed

Limit Switch

Indicates Component

is Energized

Plug-in

Connection

NOTE: The term “NORMALLY” refers to the components’ “at rest” or “de-energized” position

Diode

Wires Not

Connected Together

Terms & Abbreviations

AC – Alternating Current

BDI – Battery Discharge Indicator

CB – Circuit Breaker

CR – Relay (Contact Type)

LED – Light Emitting Diode

M– Motor

PWM (Pulse Width Modulation) – A method of using controlled on/off times to regulate voltage and current to an electrical device

Standoff – A common connecting point for multiple wires

Indicates Movement

from Normal Position

Indicates Component in

Position Other than Normal

Relay Contacts (Part 2 of Relay)

Normally Open Normally Closed

CR1 CR1

Solenoid (Valve

or Actuator) Potentiometer

Information

Warning!Assembly

Normally Open

Double Throw

Momentary Switch

Nobles Speed Scrub 9002377 REV.00 (08-06)

SAFETY LABELS

The safety labels appear on the machine in the locations indicated. Replace labels if they are missing or become

damaged or illegible.

WARNING LABEL --

Located on recovery tank cover.

BATTERY CHARGE LABEL --

Located on bottom side of recovery tank.

WARNING: Fire Or Explosion

Hazard. Batteries Emit Hydrogen

Gas. Keep Sparks And Open

Flame Away. Keep Battery

Compartment Open When

Charging.

SPINNING BRUSH LABEL --

Located on scrub head

WARNING: Spinning Brush.

Keep Hands Away. Turn Off Power

Before Working On Machine.

Speed Scrub – Maintenance

(Page 1 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

BATTERY INSTALLATION

FIG. 1

3. Connect the battery cables to the battery posts as

shown (Figure 2), RED TO POSITIVE (+) and

BLACK TO NEGATIVE (--).

235 A/20Ah

FIG. 2

WARNING: Fire Or Explosion Hazard.

Batteries Emit Hydrogen Gas. Keep Sparks And

Open Flame Away. Keep Battery Hood Open When

Charging.

FOR SAFETY: When installing batteries, wear

protective gloves and eye protection. Avoid

contact with battery acid.

Battery Specifications:

Four 6 volt, 235A/20h deep cycle batteries. Maximum

battery dimensions:

7.5 in / 190 mm W x 10.8 in / 275 mm L x 11.2 in / 284

mm H.

1. Park the machine on a level surface, remove the

key and set the parking brake, if equipped.

2. Carefully install the batteries into the battery

compartment tray (Figure 1). Arrange the battery

posts as shown (Figure 2).

Machine

Front

RED

BLACK

SQUEEGEE REMOVAL & INSTALLATION

REMOVING SQUEEGEE ASSEMBLY

1. Park the machine on a level surface, remove the

key and set the parking brake if equipped.

2. Lift the squeegee lift lever to the upward position

(Figure 3).

FIG. 3

3. Remove the vacuum hose from the squeegee

assembly. Note loop and clip on hose (Figure 4).

FIG. 4

4. Loosen the knobs and slide squeegee assembly away

from pivot bracket (Figure 5).

FIG.5

5. Installation is in reverse order of removal.

Speed Scrub – Maintenance

(Page 2 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

6. Check the squeegee blades for proper deflection.

The blades should deflect as shown (Figure 6).

FIG. 6

7. To adjust the blade deflection, place the squeegee

assembly on a level surface and adjust the casters

as shown (Figure 7).

2mm

1/16”

FIG. 7

The machine is equipped with four resettable circuit

breakers and four fuses to protect the machine from

damage. If a breaker should trip, determine the cause,

allow the motor to cool then manually reset the circuit

breaker button. The circuit breaker panel is located

near the battery compartment (Figure 29). The fuses

are located inside the circuit breaker box. When

replacing a fuse never substitute a higher Amp rated

fuse than specified.

CIRCUIT BREAKERS:

10 A -- Main (A)

25 A -- Vacuum motor (B)

25 A -- Left brush motor (C)

25 A -- Right brush motor (D)

FUSES:

100 A -- Main

30 A -- Propel motor

7.5 A -- FaST system

7.5 A -- Off--aisle wand pump (located in control

console)

CIRCUIT BREAKERS AND FUSES

FIG. 7

CHARGING BATTERIES

ATTENTION: To prolong the life of the batteries

only recharge the batteries if the machine was

used for a total of 30 minutes or more. Do not leave

batteries discharged for lengthy periods.

WARNING: Fire Or Explosion Hazard.

Batteries Emit Hydrogen Gas. Keep Sparks And

Open Flame Away. Keep Battery Compartment

Open When Charging.

FOR SAFETY: When servicing batteries, wear

protective gloves and eye protection when

handling batteries and battery cables. Avoid

contact with battery acid.

BATTERY CHARGER SPECIFICATIONS

SCHARGER TYPE:

-- FOR SEALED (Gel) BATTERIES

-- FOR WET (Lead acid) BATTERIES

SOUTPUT VOLTAGE - 24 VOLTS

SOUTPUT CURRENT - 20 AMPS

SAUTOMATIC SHUTOFF CIRCUIT

SFOR DEEP CYCLE BATTERY CHARGING

ON--BOARD BATTERY CHARGER SETTINGS

If your machine is equipped with the on--board charger,

the charger settings must be set for your battery type

before charging. Failure to properly set will result in

battery damage.

To determine your battery type, see battery label.

Contact your battery supplier if not specified.

To verify the setting of the charger, connect the charger

cord into an electrical receptacle. The charger will

display a sequence of codes. One of the codes will

either read “GEL” or “Acd” (Figure 41).

GEL = Set for sealed/maintenance free batteries

Acd = Set for wet/lead acid batteries

FIG. 41

Speed Scrub – Maintenance

(Page 3 of 16)

12.5 mm

½”

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

To change the setting, unplug the charger, peel up the

corner of the display label and set the switches

accordingly (Fig. 42). The charger cord must be

unplugged when resetting.

WET “Acd” BATTERY

SEALED “GEL” BATTERY

FIG. 42

USING THE ON--BOARD BATTERY CHARGER

IMPORTANT: Before charging, make sure that the

charger setting is properly set for your battery type

(See ON--BOARD CHARGER SETTINGS).

1. Transport the machine to a well--ventilated area.

2. Park the machine on a flat, dry surface. Turn the

key off and set the parking brake, if equipped.

3. If charging wet (lead acid) batteries check the fluid

level before charging (See BATTERY

MAINTENANCE).

4. Prop up the recovery tank for ventilation

(Figure 43).

FIG. 43

5. Connect the charger’s AC power supply cord into a

properly grounded receptacle (Figure 44).

NOTE: The machine will not operate when charging.

FIG. 44

6. The charger will display a sequence of codes once

the cord is connected (Figure 45).

Three--digits + the following code:

A = Charging current

U = Battery voltage

h = Charging time

C = Charging ampere--hours [Ah]

E = Energy used [Kwh]

“GEL” or “Acd” = Battery type the charger is

currently set for. Before charging make sure

your battery type matches the display:

GEL=Sealed, Acd=Wet (lead acid). To change

setting, see ON--BOARD CHARGER

SETTINGS.

Press the arrow button to review the codes.

FIG. 45

7. Once the charging cycle begins, the indicator lights

will progress from red, yellow to green. When the

green indicator light comes on, the charging cycle

is done. Unplug the charger cord.

If the charger detects a problem, the charger will

display an error code (See ON--BOARD BATTERY

CHARGER ERROR CODES).

Speed Scrub – Maintenance

(Page 4 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

ON--BOARD BATTERY CHARGER ERROR CODES

DISPLAY CODE FAULT SOLUTION

bat Loose or damaged battery cable Check battery cable connections.

Battery exceeded maximum voltage level. No action necessary.

E01 Exceeded maximum battery voltage allowed. No action necessary.

E02 Safety thermostat exceeded maximum internal

temperature.

Check if the charger vents are obstructed.

E03 Exceeded maximum time for charging phase

leaving the batteries undercharged due to a

sulfated or faulty battery.

Repeat the charging cycle and if the error

code E03 reappears check battery or

replace it.

SCt Safety timer exceeded maximum charging

time. Interrupts charging cycle.

Replace battery.

Srt Possible internal short circuit. Contact Tennant Service 1-800-553-8033

USING AN OFF--BOARD BATTERY CHARGER

1. Transport the machine to a well--ventilated area.

2. Park the machine on a flat, dry surface. Turn the

key off and set the parking brake, if equipped.

3. If charging wet (lead acid) batteries, check the fluid

level before charging (See BATTERY

MAINTENANCE).

4. Prop up the recovery tank for ventilation

(Figure 46).

FIG. 46

5. Connect the charger’s AC power supply cord into a

properly grounded receptacle.

6. Connect the charger’s DC cord into the machine’s

battery receptacle (Figure 47).

FIG. 47

7. The supplied charger will automatically begin

charging and shut off when fully charged.

NOTE: The machine will not operate when charging.

ATTENTION: Do not disconnect the charger’s DC

cord from the machine’s receptacle when the

charger is operating. Arcing may result. If the

charger must be interrupted during charging,

disconnect the AC power supply cord first.

Speed Scrub – Maintenance

(Page 5 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

ADJUSTING SCRUB HEAD BRUSHES

To ensure optimum scrubbing performance periodically

check the scrub head for proper adjustment.

FOR SAFETY: Before adjusting scrub head, stop

machine on level surface, remove key and set

parking brake if equipped.

DISK MODEL

Tools required: Measuring device, 1--1/16 in / 27 mm

wrench and 15/16 in / 24mm wrench

1. With brushes installed, lower the scrub head and

apply medium brush pressure.

2. Turn machine off and remove key.

3. From the center front and back of scrub head,

measure the distance from the top edge of scrub

head to the floor (Figure 48).

FIG. 48

4. If scrub head is not level, loosen the lock nut and

turn the scrub head leveling screw to level. Tighten

down the lock nut once head is level (Figure 49).

Lock

Nut

FIG. 49

CYLINDRICAL BRUSH MODEL

After installing a new set of cylindrical brushes check

the brush pattern to ensure proper brush adjustment.

Brushes that are not properly adjusted will result in

premature wear and poor scrubbing performance

(Figure 50).

CORRECT BRUSH PATTERN

INCORRECT BRUSH PATTERNS

Even

Pattern

Tapered

Pattern

Uneven

Pattern

FIG. 50

To Inspect the Brush Pattern:

1. Position the machine on a dry dusty floor or apply a

powdered substance, such as chalk.

2. Disconnect the drive motor wire connector to keep

machine from moving forward (Figure 51).

FIG. 51

3. Lower the scrub head to the floor and apply

maximum brush pressure.

4. Shut off the solution flow.

5. Pull the triggers to create a brush pattern on the

floor.

6. Raise the scrub head and pull the machine away.

7. Observe the brush pattern on floor. If the brush

pattern is uneven or tapered, adjustment is

required.

8. Reconnect drive motor wire.

Speed Scrub – Maintenance

(Page 6 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

To Adjust an Uneven Brush Pattern:

Tools required: Measuring device, 1--1/16 in / 27 mm

wrench and 15/16 in / 24mm wrench

1. Measure the distance from the front edge of the

scrub head to the floor and from the back edge of

the scrub head to the floor (Figure 52). The

measurements should be the same.

FIG. 52

2. To level the scrub head, loosen the lock nut and

turn the leveling screw clockwise to lower the rear

of the scrub head or counter--clockwise to lower the

front (Figure 53).

FIG. 53

3. Recheck brush pattern.

NOTE: Replace brush when bristles are worn to 5/8 in /

15 mm.

To Adjust a Tapered Brush Pattern:

Tools required: 3/8 in / 10mm wrench and 6mm hex

wrench

1. Raise the scrub head off floor and remove key.

2. Remove the idler plate from the brush (Figure 54).

FIG. 54

3. Hold the brush plug shaft with a wrench and loosen

the 6mm hex screw (Figure 55).

FIG. 55

4. To lower the brush end, turn the shaft clockwise for

the front brush and counter--clockwise for the rear

brush. Retighten hex screw (Figure 56).

FIG. 56

5. Recheck brush pattern.

NOTE: Replace brushes when bristles are worn to 5/8

in / 15 mm.

Speed Scrub – Maintenance

(Page 7 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

MACHINE MAINTENANCE

To keep the machine in good working condition, it’s

important that the following maintenance procedures

are performed on a routine basis.

WARNING: Electrical Hazard. Disconnect

Battery Cables Before Servicing Machine.

DAILY MAINTENANCE (After Every Use)

1. Drain the recovery tank (Figure 57).

FIG. 57

2. Rinse out the recovery tank (Figure 58).

FIG. 58

3. Remove the recovery tank float shut--off screen

and clean (Figure 59).

FIG. 59

4. Drain the solution tank (Figure 60).

FIG. 60

5. Rotate pad or replace when worn (Figure 61).

Disk Model

FIG. 61

6. Empty and rinse out the debris trough (Figure 62).

Cylindrical Brush Model

FIG. 62

7. Inspect the cylindrical brushes for wear. Rotate

brushes from front--to--rear every 50 hours (Figure

63). Replace when worn to a length of 5/8in/

15 mm.

Speed Scrub – Maintenance

(Page 8 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

15mm

(5/8”)

Cylindrical

Brush Model

FIG. 63

8. Remove debris buildup from the underside of the

cylindrical brush scrub head, including the idler

plates and drive hubs (Figure 64).

Cylindrical Brush Model

FIG. 64

9. Wipe the squeegee blades clean (Figure 65). Store

the squeegee assembly in the raised position to

prevent blade damage.

FIG. 65

10. Check the condition of the squeegee blade wiping

edge (Figure 66). Rotate blade if worn (See

SQUEEGEE BLADES).

FIG. 66

11. Clean the machine with an all purpose cleaner and

damp cloth (Figure 67).

FOR SAFETY: When cleaning machine, do not

power spray or hose off machine. Electrical

malfunction may occur.

FIG. 67

12. Inspect the condition of the scrub head skirt,

replace if worn or damaged (Figure 68).

Cylindrical Brush Model

Disk Model

FIG. 68

Speed Scrub – Maintenance

(Page 9 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

13. FaST Model: Connect the FaST--PAK supply hose

to the storage plug when not in use (Figure 69).

Remove any dried concentrate from the hose

connector by soaking it in warm water.

FIG. 69

14. Clean wet/lead acid batteries to prevent corrosion

and check for loose battery cable connections (See

BATTERY MAINTENANCE).

15. Recharge the batteries (Figure 70) after a total of

30 minutes of use or more.

FIG. 70

MONTHLY MAINTENANCE

1. Remove the solution tank filter from underneath the

machine and rinse out the screen (Figure 71).

Make sure the solution tank is empty before

removing filter.

FIG. 71

2. Check the cylindrical brush belt tension every 100

hours (Figure 72). Belt tension should flex 0.1 in /

3mm at midpoint, with 2.5--2.7 lb / 1.13--1.22 kg

force.

WARNING: Electrical Hazard. Disconnect

Battery Cables Before Servicing Machine.

Cylindrical Brush Model

FIG. 72

3. Inspect and clean the recovery tank cover seal

(Figure 73). Replace if damaged.

FIG. 73

4. Lubricate all pivot points and rollers with a water

resistant grease.

5. Lubricate the casters with a water resistant grease

(Figure 74).

FIG. 74

6. Clean the parking brake clamp with a cleaning

solvent.

7. Check the machine for loose nuts and bolts.

Speed Scrub – Maintenance

(Page 10 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

8. Check the machine for leaks.

BATTERY MAINTENANCE (Wet/lead acid batteries)

1. Check battery fluid level frequently to prevent

battery damage. The fluid should be at the level

shown (Figure 75). Add distilled water if low. DO

NOT OVERFILL, the fluid may expand and

overflow when charging.

Before Charging After Charging

CORRECT BATTERY FLUID LEVEL:

FIG. 75

WARNING: Fire Or Explosion Hazard.

Batteries Emit Hydrogen Gas. Keep Sparks And

Open Flame Away. Keep Battery Compartment

Open When Charging.

2. Clean the batteries to prevent battery corrosion.

Use a scrub brush with a mixture of baking soda

and water (Figure 76).

FOR SAFETY: When cleaning batteries, wear

protective gloves and eye protection. Avoid

contact with battery acid.

FIG. 76

SQUEEGEE BLADES

When the blades become worn, simply rotate the

blades end-for-end or top-to-bottom to a new wiping

edge. Replace blades when all edges are worn.

The front blades on the 28 in / 700 mm and 32 in /

800mm squeegee assemblies have 12/14 slots on one

edge and 6 slots on the opposite edge (Figure 77). If

making sharp turns with the cylindrical brush models

use the 12/14 slotted edge for maximum water pickup.

6Slotson

one edge

12/14 Slots on

opposite edge

FIG. 77

Replacing Squeegee Blades:

1. Loosen the band clamp and remove the band from

the squeegee assembly (Figure 78).

FIG. 78

Speed Scrub – Maintenance

(Page 11 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

2. Replace or rotate the rear blade to a new wiping

edge and replace band (Figure 79).

FIG. 79

3. To change the front blade, remove the band and

loosen the four knobs. Replace or rotate the front

blade to a new wiping edge (Figure 80)

FIG. 80

MOTOR MAINTENANCE

Contact an Authorized Tennant Service Center for

carbon brush replacement.

Carbon Brush Replacement Hours

Drive Transaxle Motor

750

Vacuum Motor

Disk Brush Motors

Cylindrical Brush Motors 1000

WARNING: Electrical Hazard. Disconnect

Battery Cables Before Servicing Machine.

FaST SYSTEM MAINTENANCE

Every 1000 hours replace the orifice plate and filter

screen located inside the detergent injector assembly.

1. To access the detergent injector assembly, lower

the scrub head and remove the front shroud

(Figure 81)

FIG. 81

2. Remove the injector assembly from clamps

(Figure 82).

FIG. 82

3 Unthread the black plastic filter housing and replace

the orifice plate and filter (Figure 83).

FIG. 83

Speed Scrub – Maintenance

(Page 12 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

JACKING UP MACHINE

Use the designated locations to jack up the machine for

service (Figure 84). Empty the recovery and solution

tank and position the machine on a level before jacking.

FOR SAFETY: When servicing machine, jack

machine up at designated locations only. Use jack

or hoist that will support machine weight.

FIG. 84

TRANSPORTING MACHINE

When transporting the machine by trailer or truck, be

certain to follow the transporting procedure below:

1. Drain machine tanks.

2. Load the machine using a ramp that can support

the machine weight and person loading it. The

maximum ramp incline should not exceed 11°at a

ramp length of 3.7m (12 ft).

3. Position the front of machine up against the front of

the trailer or truck. Lower the scrub head and

squeegee.

4. Set the parking brake, if equipped, and place a

block behind each wheel to prevent the machine

from rolling.

5. Secure with tie--down straps as shown (Figure 85).

It may be necessary to install tie-down brackets to

trailerortruck.

FOR SAFETY: When loading/unloading machine

onto/off truck or trailer, use a ramp that can

support the machine weight and person loading it,

do not exceed a 11°ramp incline at a ramp length

of 3.7m (12 ft), use tie--down straps to secure

machine and block machine wheels.

FIG. 85

STORING MACHINE

1. Charge the batteries before storing machine to

prolong the life of the batteries.

2. Drain and rinse the tanks thoroughly.

3. Store the machine in a dry area with the squeegee

and scrub head in the up position.

4. Open the recovery tank cover to promote air

circulation.

ATTENTION: Do not expose machine to rain, store

indoors.

5. If storing machine in freezing temperatures, make

sure to drain machine of all water.

For models equipped with the FaST System, follow

the FaST SYSTEM FREEZE PROTECTION

procedure below.

FaST SYSTEM FREEZE PROTECTION

Valve Coupling #1006205 and 6 in / 15 cm Hose

#63182 are required (Purchased separately).

1. Remove the FaST--PAK carton and connect the

valve coupling and 15 cm hose (purchased parts)

to the supply hose (Figure 86).

FIG. 86

Speed Scrub – Maintenance

(Page 13 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

2. Disconnect the opposite end of the supply hose

from the injector assembly and drain the supply

hose (Figure 87). To access the injector assembly

remove the front shroud.

FIG. 87

3. Reconnect the supply hose to injector assembly

and pour a recreational vehicle (RV) anti--freeze

into the supply hose until full (Figure 88).

FIG. 88

4. Operate the FaST system as normal until the

foaming stops. This step could take anywhere from

5--10 minutes.

5. Remove the valve coupling and connect the

storage plug (Figure 89).

FIG. 89

6. Drain the recovery and solution tanks and store

machine.

7. To drain the anti--freeze, repeat the draining

process above and reconnect the supply hose to

the FaST--PAK carton.

RECOMMENDED STOCK ITEMS

Refer to the Parts List Manual for recommended stock

items. Stock Items are clearly identified with a bullet

preceding the parts description. See example below:

Speed Scrub – Maintenance

(Page 14 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

TROUBLESHOOTING

PROBLEM CAUSE SOLUTION

Machine will not operate Discharged batteries Charge batteries

Emergency--stop button activated Turnbuttonclockwisetoreset

Faulty battery(s) Replace battery(s)

Loose battery cable Tighten loose cable

Tripped main circuit breaker Reset 10A main circuit breaker

Main fuse blown Replace 100A main fuse

Faulty key switch Contact Service Center

Machine fault detected. See Battery Meter LED Fault Codes

On--board battery charger

will not operate

Plug not connected to power supply Check plug connection

Faulty charger fuse Replace charger fuse

Faulty power supply cord Replace cord

Error detected. See On--board Battery Charger Error Codes

Brush motor(s) will not

operate

Scrub head is raised off floor Lower scrub head

Battery meter lockout activated Recharge batteries

Discharged batteries Charge batteries

Tripped brush motor circuit breaker Reset 25A circuit breaker button

Faulty scrub head (up/down) switch Contact Service Center

Faulty trigger switch(es) Contact Service Center

Faulty brush motor or wiring Contact Service Center

Worn carbon brushes Contact Service Center

Broken or loose belt

(cylindrical brush model)

Replace or tighten belt

Faulty relay switch Contact Service Center

Machine will not propel Parking brake is set Release parking brake lever

Machine fault detected See Battery Meter LED Fault Codes

Propel motor fuse blown Replace 30A fuse

Faulty transaxle motor or wiring Contact Service Center

Worn carbon brushes Contact Service Center

Exceeded maximum incline Avoid steep inclines and reset key

Vacuum motor will not

operate

Squeegee is raised off floor Lower squeegee

Discharged batteries Charge batteries

Tripped vacuum motor circuit breaker Reset 25A circuit breaker button

Faulty vacuum motor or wiring Contact Service Center

Worn carbon brushes Contact Service Center

Little or no solution flow Solution tank is empty Fill solution tank

Clogged solution tank filter Clean solution tank filter

Discharged batteries Charge batteries

Clogged solution valve Remove valve and clean

Solution flow control knob set too low Adjust solution control flow knob

Loose screw on control knob Calibrate knob and retighten screw.

Speed Scrub – Maintenance

(Page 15 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Nobles Speed Scrub (08--06)

TROUBLESHOOTING -- Continued

PROBLEM CAUSE SOLUTION

Poor water pickup Recovery tank is full or excessive foam

buildup

Drain recovery tank

Loose drain hose cap Tighten cap

Clogged float shut--off screen located in

recovery tank

Clean screen

Clogged squeegee assembly Clean squeegee assembly

Worn squeegee blades Replace or rotate squeegee blades

Incorrect Squeegee blade deflection Adjust Squeegee blade height

Loose vacuum hose connections Secure hose connections

Clogged vacuum hose Remove clogged debris

Damaged vacuum hose Replace vacuum hose

Recovery tank cover not in place Properly position cover

Damaged recovery tank cover seal Replace seal

Faulty vacuum motor Contact Service Center

Low battery charge Recharge batteries

Poor scrubbing

performance

Debris caught in brush Remove debris

Worn brushes/pads Replace brushes/pads

Incorrect brush pressure setting Adjust pressure setting

Wrong brush/pad type. Use correct brush/pad

Reduced run time Batteries not fully charged Fully recharge batteries

Defective batteries Replace battery

Batteries need maintenance See BATTERY MAINTENANCE

Faulty battery charger Repair or replace battery charger

FaST Model: FaST

System does not operate

or operate correctly

FaST system switch is not turned on Turn on FaST system switch

FaST--PAK supply hose not connected Connect supply hose

Clogged FaST--PAK supply hose or con-

nectors

Soak in warm water to unclog

Empty FaST--PAK carton Replace FaST--PAK carton

Kink in FaST--PAK supply hose Undo hose kink

Clogged FaST solution system Contact Service Center

Faulty FaST system on/off switch Contact Service Center

Faulty pump Contact Service Center

Clogged solution tank filter Drain solution tank. Remove solution tank

filter, clean and reinstall

Clogged detergent orifice/filter screen Replace orifice/filter screen

(See FaST SYSTEM MAINTENANCE)

Clogged FaST solution inlet filter Contact Service Center

FaST Pump fuse blown Replace 7.5A fuse

Speed Scrub – Maintenance

(Page 16 of 16)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub – Electrical Schematic

Nobles Speed Scrub 9002377 REV.00 (08-06)

CONTINUED

MAIN HARNESS

Speed Scrub – Wiring Harness Detail

(Page 1 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

MAIN HARNESS

Speed Scrub – Wiring Harness Detail

(Page 2 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

CONTINUED

MAIN HARNESS

Speed Scrub – Wiring Harness Detail

(Page 3 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

MAIN HARNESS

Speed Scrub – Wiring Harness Detail

(Page 4 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

CHASSIS HARNESS

Speed Scrub – Wiring Harness Detail

(Page 5 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

FaST HARNESS

Speed Scrub – Wiring Harness Detail

(Page 6 of 6)

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub –Control Board & BDI Details

1 2+ - 1

7 6 5 4 3 12

10 9 8

14 13 12 11

BATTERY

CONNECTIONS

PROPEL MOTOR

CONNECTIONS

SCRUB OUTPUT

CONNECTIONS

PROGRAMMING

CONNECTIONS

CONTROL

CONNECTIONS

BATTERY DISCHARGE INDICATOR

(VIEWED FROM REAR)

CONTROL BOARD

Nobles Speed Scrub 9002377 REV.00 (08-06)

Name Pin # Wire # Color Active

Voltage Inactive

Voltage Input/

Output

1 34 yellow battery (+) x input

2 9 white 10v to 24v x input

3 13J black 0v 0v input

4 13F black 0v 0v input

Function

Battery

Discharge

Indicator

Battery (+) supply voltage

Battery status signal

Battery (-) supply voltage

Static drain path

Speed Scrub –Control Board & BDI Pin Charts

CONTROL BOARD CONNECTIONS

BATTERY DISCHARGE INDICATOR CONNECTIONS

Name Pin # Wire # Color Active

Voltage Inactive

Voltage Input/

Output Notes

+ 22 brown battery (+) x input x Battery positive power supply

- 13A black battery (-) x input x Battery negative power supply

1 84 yellow 0v to 24v 0v output Forward=4v to 24v, Reverse=0v

2 19 white 0v to 24v 0v output Reverse=1.5v to 12v, Forward=0v

1 25 green battery (+) battery (+) output

2 27 purple battery (-) open output

1x x x x x x

2x x x x x x

3x x x x x x

4x x x x x x

1 3 orange input x Throttle signal input Reverse=0v to 2.25v; Fwd=2.75v to 5v;

Neutral=2.25v to 2.75v

2 32 brown 5v x output x Throttle 5v reference signal

3 29 white battery (-) open output CR2 Vacuum fan relay

4x x x x x x

5 74 yellow battery (+) open input x Key switch input Signal to turn control board ON

6 48 gray battery (-) 2.5v input x Low battery voltage lockout level

select

Normal mode: wire 48 NOT connected to

13H (20.7v lockout for WET batteries)

Special mode: wire 48 connected to 13H

(22.4v lockout for Europe)

7 54 yellow battery (+) battery (+) output x Battery (+) supply for input

switches

Output in series to charger safety,E-stop,&

key switches

85green 0v x output x Throttle 0v reference signal

9xx xxxx

10 9white output BDI Battery Discharge Indicator Communicates battery & control board

information (up to 10v)

11 xx xxxx

12 xx xxxx

13 13G black battery (-) x output see

notes

Battery (-) output for various

components

Output to vacuum switch, CR3 actuator

relay, Battery Discharge Indicator, & low

battery voltage lockout select

14 11 pink 0v 2.5v input x Vacuum switch

Function/Component Controlled

Battery

Connections

Propel Motor

Connections

Scrub Output

Connections

M4 Propel motor power supply

connections

see

notes Scrub functions power supply

Programming

Connections

Control

Connections

Controls CR1 (brush contactor), solution

valve, CR4 (FaST relay), & hour meter

Used only for programming the

control board

see notes

Speed Scrub – BDI Diagnostic Fault Indicators

Very Low Battery

Voltage

The batteries need immediate charging or there is a bad

connection to the batteries. Charge the batteries,or check the

connections to the battery.

Low Battery Voltage

(Slowly Flashing @

40Hz)

The batteries need charging or there is a bad connection to the

batteries. Charge the batteries,or check the connections to the

battery.

Propel Motor Open

(Quickly Flashing @

200 Hz)

The propel motor has an open connection. Check all the

connections and wires between the motor and the control

board. Test motor for open circuit.

Propel Motor Shorted

The propel motor has a short circuit. Check all the connections

and wires between the motor and the control board. Test motor

for short circuit.

Battery Lockout

The voltage level of the batteries has fallen below the Battery

Lockout Level and the control board is inhibiting certain

machine functions. Charge the batteries.

Not Used

Possible Control

Board Fault

A control board fault is indicated. Make sure that all

connections are secure.

Not Used

High Battery Voltage

An excessive voltage has been applied to the controller. This is

usually caused by a poor battery connection. Check all battery

connections.

Control Board in

Sleep Mode

(LED's flash

one at a time from left to

right)

The controller has entered sleep mode. Switch the control

system off and then on again.

Throttle Displaced

(LED's ripple back and forth)

A throttle fault is indicated. Make sure that the forward and

reverse switches are released before switching on the

machine, or check all connections and wires from the switches

to the control board.

LED Flashing Codes

BAR FLASHING

BARS FLASHING

Nobles Speed Scrub 9002377 REV.00 (08-06)

1 RED 13 BLK

CONTROL BOARD

Speed Scrub - Key OFF Power Distribution (With Standard Off-Board Battery Charger)

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

1 RED

100A

1 RED

CONDITIONS: Key OFF, off-board battery charger NOT CONNECTED to charger plug

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

30A

TO CIRCUIT

BREAKER CB3

TO FaST PUMP

MOTOR M6

TO CIRCUIT

BREAKER CB2

TO CIRCUIT

BREAKER CB1

22 22

CR1

CR4

CR3

CR2

TO CIRCUIT

BREAKER CB4

TO FUSE F4

18 28

7.5A

BATTERY

DISCHARGE

INDICATOR

1 2

13 BLK

CR3

EMERGENCY

STOP

SWITCH

CHARGER

SAFETY

SWITCH

KEY

SWITCH

414

13 BLK

13 BLK 13 BLK

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

ACTUATOR

RELAY

Nobles Speed Scrub 9002377 REV.00 (08-06)

CONDITIONS: Key OFF, off-board battery charger CONNECTED to charger plug

1 RED 13 BLK

CONTROL BOARD

Speed Scrub - Key OFF Power Distribution (With Standard Off-Board Battery Charger)

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

1 RED

100A

1 RED

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

30A

TO CIRCUIT

BREAKER CB3

TO FaST PUMP

MOTOR M6

TO CIRCUIT

BREAKER CB2

TO CIRCUIT

BREAKER CB1

22 22

CR1

CR4

CR3

CR2

TO CIRCUIT

BREAKER CB4

TO FUSE F4

18 28

7.5A

1 2

13 BLK

CR3

EMERGENCY

STOP

SWITCH

CHARGER

SAFETY

SWITCH

KEY

SWITCH

414

13 BLK

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

BATTERY

DISCHARGE

INDICATOR

34 9

13 BLK

ACTUATOR

RELAY

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub - Key OFF Power Distribution (With Optional On-Board Battery Charger)

CONDITIONS: Key OFF, On-Board battery charger NOT CONNECTED to AC power

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

iIf On-Board Charger is connected to AC

power, ALL machine functions will be

disabled when Key Switch is turned ON

iThe battery charger uses a normally closed relay to

send a signal to the control board – the relay opens

when the charger is plugged in to AC power

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

13 BLK

1 RED

100A

1 RED

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

30A

TO CIRCUIT

BREAKER CB3

TO FaST PUMP

MOTOR M6

TO CIRCUIT

BREAKER CB2

TO CIRCUIT

BREAKER CB1

22 22

CR1

CR4

CR3

CR2

TO CIRCUIT

BREAKER CB4

TO FUSE F4

18 28

7.5A

1 2

13 BLK

CR3

EMERGENCY

STOP

SWITCH

KEY

SWITCH

414

13 BLK

AC POWER

CORD

ON-BOARD

CHARGER

NOT CONNECTED TO AC

RED

BLACK

BATTERY

DISCHARGE

INDICATOR

34 9

13 BLK

ACTUATOR

RELAY

Nobles Speed Scrub 9002377 REV.00 (08-06)

Speed Scrub - Key OFF Power Distribution (With Optional On-Board Battery Charger)

CONDITIONS: Key OFF, On-Board battery charger CONNECTED to AC power

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

iIf On-Board Charger is connected to AC

power, ALL machine functions will be

disabled when Key Switch is turned ON

iThe battery charger uses a normally closed relay to

send a signal to the control board – the relay opens

when the charger is plugged in to AC power

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

13 BLK

1 RED

100A

1 RED

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

30A

TO CIRCUIT

BREAKER CB3

TO FaST PUMP

MOTOR M6

TO CIRCUIT

BREAKER CB2

TO CIRCUIT

BREAKER CB1

22 22

CR1

CR4

CR3

CR2

TO CIRCUIT

BREAKER CB4

TO FUSE F4

18 28

7.5A

1 2

13 BLK

CR3

EMERGENCY

STOP

SWITCH

KEY

SWITCH

414

13 BLK

AC POWER

CORD

ON-BOARD

CHARGER

CONNECTED TO AC

RED

BLACK

BATTERY

DISCHARGE

INDICATOR

13 BLK

ACTUATOR

RELAY

Nobles Speed Scrub 9002377 REV.00 (08-06)

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

1 RED

100A

1 RED

30A

TO CIRCUIT

BREAKER CB3

TO FaST PUMP

MOTOR M6

TO CIRCUIT

BREAKER CB2

TO CIRCUIT

BREAKER CB1

22 22

CR1

CR4

CR3

CR2

TO CIRCUIT

BREAKER CB4

TO FUSE F4

18 28

7.5A

1 2

13 BLK

CR3

74 13

13 BLK

EMERGENCY

STOP

SWITCH

41424

CHARGER

SAFETY

SWITCH

KEY

SWITCH

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

Speed Scrub - Key ON Power Distribution

CONDITIONS: Key ON

iThe troubleshooting information from this page forward applies to machines

with On-Board or Off-Board Chargers unless otherwise noted

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

BATTERY

DISCHARGE

INDICATOR

34 9

13 BLK

ACTUATOR

RELAY

Nobles Speed Scrub 9002377 REV.00 (08-06)

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

100A

30A 22 22

1 2

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

Speed Scrub – Propel Forward System

CONDITIONS: Key ON, forward propel engaged

PROPEL MOTOR

FORWARD

DIRECTION

SWITCH

REVERSE

FORWARD

8484

84 19

3232

39 39

RECOVERY TANK

PROPEL INTERLOCK

SWITCH

SPEED LIMITER

POTENTIOMETER

50KΩ

4131

LEFT

TRIGGER

SWITCH

RIGHT

TRIGGER

SWITCH

0V REFERENCE

5V REFERENCE

SIGNAL INPUT

iOnly one trigger switch needs to be

closed to propel machine forward

The Propel Motor (M4) is controlled by PWM; A

higher duty cycle will result in higher travel speed

Nobles Speed Scrub 9002377 REV.00 (08-06)

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

100A

30A 22 22

1 2

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

Speed Scrub – Propel Reverse System

CONDITIONS: Key ON, reverse propel engaged

PROPEL MOTOR

REVERSE

DIRECTION

SWITCH

REVERSE

FORWARD

8484

84 19

3232

39 39

RECOVERY TANK

PROPEL INTERLOCK

SWITCH

SPEED LIMITER

POTENTIOMETER

50KΩ

4131

RIGHT

TRIGGER

SWITCH

0V REFERENCE

5V REFERENCE

SIGNAL INPUT

LEFT

TRIGGER

SWITCH

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

The Propel Motor (M4) is controlled by PWM; A

higher duty cycle will result in higher travel speed

Nobles Speed Scrub 9002377 REV.00 (08-06)

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

100A

30A 22 22

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

Speed Scrub – Scrub Brushes

CONDITIONS: Key ON, Scrub Head lowered for cleaning, propel engaged

BRUSH

PRESSURE

GAUGE

CR1

25 26 7

CR1

CB2

25A

CB1

25A

13 BLK

RIGHT BRUSH

MOTOR

LEFT BRUSH

MOTOR

1 RED

SCRUB/TRANSPORT

SWITCH (INTERNAL TO

SCRUB HEAD ACTUATOR)

BRUSH

CONTACTOR

iThe Scrub/Transport Switch closes when the Scrub

Head Actuator extends (lowers) 2” (50mm) or more

iThe Brush Pressure Gauge monitors

current on the Right brush motor only

Nobles Speed Scrub 9002377 REV.00 (08-06)

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

100A

30A 22

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

Speed Scrub – Vacuum Fan System

CONDITIONS: Key ON, Squeegee lowered

CR2

CB3

25A

13 BLK13 BLK

VACUUM FAN

MOTOR

1 RED 20

EMERGENCY

STOP

SWITCH

414 24

CHARGER

SAFETY

SWITCH

KEY

SWITCH

54 5

VACUUM FAN

RELAY

CR2

4444

44 29 29

VACUUM FAN

SWITCH

Nobles Speed Scrub 9002377 REV.00 (08-06)

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

Speed Scrub – Conventional Solution Valve, Hour Meter

CONDITIONS: Key ON, scrub head lowered for cleaning, propel engaged, conventional scrub selected

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

100A

30A 22 22

CR4

13 BLK13 BLK

FaST PUMP

MOTOR

1 RED

SCRUB/TRANSPORT

SWITCH (INTERNAL TO

SCRUB HEAD ACTUATOR)

BRUSH

CONTACTOR

7.5A 18

1 2

CR1

CR4

CONVENTIONAL

SOLUTION

VALVE

FaST

RELAY

HOUR METER

FaST/

CONVENTIONAL

SWITCH

CONV

FaST

30 30

1616

iThe Scrub/Transport Switch closes when the Scrub

Head Actuator extends (lowers) 2” (50mm) or more

iThe Hour Meter is activated only when the Scrub

Head is lowered, and propel is engaged

Nobles Speed Scrub 9002377 REV.00 (08-06)

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

Speed Scrub – FaST Pump, Hour Meter

CONDITIONS: Key ON, scrub head lowered for cleaning, propel engaged, FaST scrub selected

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

100A

30A 22 22

CR4

13 BLK13 BLK

FaST PUMP

MOTOR

1 RED

SCRUB/TRANSPORT

SWITCH (INTERNAL TO

SCRUB HEAD ACTUATOR)

BRUSH

CONTACTOR

7.5A 18

1 2

CR1

CR4

CONVENTIONAL

SOLUTION

VALVE

FaST

RELAY

HOUR METER

FaST/

CONVENTIONAL

SWITCH

CONV

FaST

30 30

1616

iThe Scrub/Transport Switch closes when the Scrub

Head Actuator extends (lowers) 2” (50mm) or more

iThe Hour Meter is activated only when the Scrub

Head is lowered, and propel is engaged

Nobles Speed Scrub 9002377 REV.00 (08-06)

RAISE

SHOWN IN OPERATION DURING

LOWERING OF SCRUB HEAD

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

100A

1 RED

30A 22 22

CR3

78 38

1 2

13 BLK64

13 BLK

56 68

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

Speed Scrub – Scrub Head Actuator LOWER (Extend)

CONDITIONS: Key ON, scrub head lower switch activated

CR3

TO FUSE F4

CB4

10A

SCRUB/TRANSPORT

SWITCH (INTERNAL TO

SCRUB HEAD ACTUATOR)

BRUSH

CONTACTOR

CR1 25

SCRUB HEAD

ACTUATOR

EMERGENCY

STOP

SWITCH

414 24

CHARGER

SAFETY

SWITCH

KEY

SWITCH

ACTUATOR

RELAY

EXTERNAL

LOWER LIMIT

SWITCH

LOWER LIMIT

SWITCH

RAISE LIMIT

SWITCH

INTERNAL

SWITCHES

13 BLK 13 BLK

56 68

LOWER

13 BLK

External Switch

switch

condition

OPEN OPEN CLOSED CLOSED

CLOSED CLOSED OPEN OPEN

CLOSED CLOSED CLOSED

Scrub/Transport Switch closes when actuator is extended 2" (50mm) or more

Fully Retracted (UP)

Fully Extended (DOWN)

Retracting (RAISING)

Extending (LOWERING)

Scrub Head Actuator Logic Chart

Internal Switches

Scrub/

Transport

Raise

Limit

Lower

Limit

Lower

Limit

Nobles Speed Scrub 9002377 REV.00 (08-06)

RAISE

SHOWN IN OPERATION DURING

RAISING OF SCRUB HEAD

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

100A

1 RED

30A 22 22

CR3

78 38

1 2

13 BLK64

13 BLK

56 68

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

Speed Scrub – Scrub Head Actuator RAISE (Retract)

CONDITIONS: Key ON, scrub head raise switch activated

CR3

TO FUSE F4

CB4

10A

SCRUB/TRANSPORT

SWITCH (INTERNAL TO

SCRUB HEAD ACTUATOR)

BRUSH

CONTACTOR

CR1 25

SCRUB HEAD

ACTUATOR

EMERGENCY

STOP

SWITCH

414 24

CHARGER

SAFETY

SWITCH

KEY

SWITCH

ACTUATOR

RELAY

EXTERNAL

LOWER LIMIT

SWITCH

LOWER LIMIT

SWITCH

RAISE LIMIT

SWITCH

INTERNAL

SWITCHES

13 BLK 13 BLK

56 68

13 BLK

LOWER

External Switch

switch

condition

OPEN OPEN CLOSED CLOSED

CLOSED CLOSED OPEN OPEN

CLOSED CLOSED CLOSED

Scrub/Transport Switch closes when actuator is extended 2" (50mm) or more

Fully Retracted (UP)

Fully Extended (DOWN)

Retracting (RAISING)

Extending (LOWERING)

Scrub Head Actuator Logic Chart

Internal Switches

Scrub/

Transport

Raise

Limit

Lower

Limit

Lower

Limit

Nobles Speed Scrub 9002377 REV.00 (08-06)

1 RED 13 BLK

CONTROL BOARD

6 VDC +-

6 VDC

1 RED

CHARGER

PLUG

13 BLK

1 RED 13 BLK

100A

1 RED

30A 22 22

CR3

78 58

1 2

13 BLK64

Wiring Color Codes

(Unless otherwise marked)

Tan

Pink

Brown

Orange

Yellow

Green

Blue

Purple

Gray

White

Right Most Digit

of Wire Number Color of Wire

= Battery Negative

or Logic Ground

= Battery Positive

or Logic High

Speed Scrub – Wand Pump

CONDITIONS: Key ON, wand pump switch ON

CR3

EMERGENCY

STOP

SWITCH

414 24

CHARGER

SAFETY

SWITCH

KEY

SWITCH

ACTUATOR

RELAY

13 BLK

WAND PUMP

SWITCH

7.5A

WAND PUMP

MOTOR

TO CIRCUIT

BREAKER CB4

iIf Charger Plug is connected to battery charger, ALL machine

functions will be disabled when Key Switch is turned ON

!Be cautious when working near Control Board -

Battery voltage is always present, even with Key OFF

Speed Scrub 24 32 Service Manual Nobles Ss5 Walk Behind Floor Scrubber

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