NOBLES SS500 Walk Behind Floor Scrubber Instruction Manual

NOBLES SS500 Walk Behind Floor Scrubber

Product Information

Specifications

• Product Name: Insta-FitTM Adapter
• Feature: Smart-FillTM Automatic Battery Watering
• Type: Walk-Behind Floor Scrubber R
• Model: Nobles Speed Scrub 500
• Manufacturer: Tennant Company
• Website: www.nobles.com

Product Usage Instructions

Safety

• Important Safety Instructions: Always follow safety guidelines provided in the manual to ensure safe operation of the machine.
• Safety Labels: Pay attention to safety labels on the machine for important safety information.

Operation

• Machine Components: Familiarize yourself with the different components of the machine for efficient operation.
• Scrub Head Types: Understand the types of scrub heads available for different cleaning needs.
• Control Panel Components: Learn about the functions of each control panel component for proper operation.
• Installing Batteries: Follow the provided instructions to correctly install batteries for optimal performance.
• How the Machine Works: Understand the working mechanism of the machine to operate it effectively.
• Brush and Pad Information: Use the recommended brushes and pads as per the instructions for best results.
• Machine Setup: Set up the machine according to the guidelines provided in the manual before use.

Control Panel Operation

• 1-Step Button: Function of the 1-step button on the control panel.
• Brush Pressure Button: Adjust brush pressure using the control panel button.
• Solution Flow Button: Control solution flow with this button on the control panel.
• ec-H2O Button/Indicator: Description of the ec-H2O button and its indicator (if applicable).
• Service Indicator: Understand the service indicator on the control panel.
• Parking Brake Indicator: Information about the parking brake indicator (if applicable).
• Battery Discharge Indicator: Monitor battery status using this indicator.
• Automatic Battery Watering Indicator: Learn about the automatic battery watering indicator (if applicable).

FAQs

• Q: How do I dispose of packaging materials and used machine components?
  • A: Please dispose of packaging materials and used machine components such as batteries in an environmentally safe way according to your local waste disposal regulations. Remember to recycle whenever possible.

ENGLISH

®

TennantTrue® Parts IRIS® a Tennant Technology
Insta-FitTM Adapter
Smart-FillTM Automatic Battery Watering

SPEED SCRUB® 500
WALK-BEHIND FLOOR SCRUBBER R
OPERATOR MANUAL

For the latest Parts manuals and other language Operator manuals, visit:
www.nobles.com/manuals

9015513 Rev. 04 (11-2022)
9015513

INTRODUCTION

This manual is furnished with each new model. It provides necessary operation and maintenance instructions.
Read this manual completely and understand the machine before operating or servicing it.
This machine will provide excellent service. However, the best results will be obtained at minimum costs if:
S The machine is operated with reasonable care.
S The machine is maintained regularly – per the
maintenance instructions provided.
S The machine is maintained with manufacturer
supplied or equivalent parts.
To view, print or download manuals online visit www.tennantco.com/manuals
PROTECT THE ENVIRONMENT Please dispose of packaging materials and used machine components such as batteries in an environmentally safe way according to your local waste disposal regulations.
Always remember to recycle.

INTENDED USE
The Speed Scrub 500 walk-behind floor scrubber is intended for commercial use, for example in hotels, schools, hospitals, factories, shops, offices and rental businesses. It is designed to scrub hard floor surfaces (concrete, tile, stone, synthetic, etc.) in an indoor environment. This machine is not intended for cleaning carpets or sanding wood floors. Use only recommended pads/brushes and commercially available floor cleaning detergents. Do not use this machine other than described in this Operator Manual.
MACHINE DATA
Please fill out at time of installation for future reference. Model No. –
Serial No. –
Installation Date –
SERIAL NUMBER LABEL LOCATION

Tennant Company 10400 Clean Street Eden Prairie, MN 55344- 2650 Phone: (800) 553- 8033 www.nobles.com
1-STEP is a trademark of Tennant Company. Specifications and parts are subject to change without notice. Original Instructions. Copyright ©2017-2022 Tennant Company. All rights reserved.
2

UNCRATING MACHINE
Carefully check machine for signs of damage. Report damages at once to carrier. Contact distributor or Tennant for missing items. To uncrate the machine, remove straps, wheel blocks and shipping brackets. Using the supplied ramp carefully back the machine off the pallet. Make sure scrub head is in the raised position. ATTENTION: Do not remove machine from pallet without using ramp, machine damage may occur.
Nobles Speed Scrub 500 (11-2022)

Nobles Speed Scrub 500 (01-2017)

SAFETY

IMPORTANT SAFETY INSTRUCTIONS

– SAVE THESE INSTRUCTIONS

The following warning precautions are used throughout this manual as indicated in their description:
WARNING: To warn of hazards or unsafe
practices which could result in severe personal injury or death.
FOR SAFETY: To identify actions which must be followed for safe operation of equipment.
The following information signals potentially dangerous conditions to the operator. Know when these conditions can exist. Locate all safety devices on the machine. Report machine damage or faulty operation immediately.
WARNING: To Reduce the Risk of Fire,
Explosion, Electric Shock or Injury:
– Read manual before operating machine.
– Do not use or pick up flammable materials or reactive metals.
– Do not use near flammable liquids, vapors or combustible dusts. This machine is not equipped with an explosion proof motor. The electric motor will spark upon start up and during operation which could cause a flash fire or explosion if machine is used in an area where flammable vapors/liquids or combustible dusts are present.
– Batteries emit hydrogen gas. Explosion or fire can result. Keep sparks and open flame away when charging.
– Disconnect battery cables and charger cord before cleaning and servicing machine.
– Do not charge batteries with damaged cord. Do not modify plug.
If the charger supply cord is damaged or broken, it must be replaced by the manufacturer or its service agent or a similarly qualified person in order to avoid a hazard.
– Do not use outdoors. Store indoors.
– Spinning pad/brush, keep hands away.
IRIS Telemetry – This machine may be equipped with technology that automatically communicates over the cellular network. If the machine will be operated where cell phone use is restricted because of concerns related to equipment interference, please contact a Tennant representative for information on how to disable the cellular communication functionality.

FOR SAFETY:
1. Do not operate machine: – Unless trained and authorized. – Unless operator manual is read and understood. – Unless mentally and physically capable of following machine instructions. – Under the influence of alcohol or drugs. – While using a cell phone or other types of electronic devices. – If not in proper operating condition. – In outdoor areas. This machine is for indoor use only. – In areas where flammable vapors/liquids or combustible dusts are present. – With pads or accessories not supplied or approved by Tennant. The use of other pads may impair safety. – In areas with possible falling objects. – In areas that are too dark to safely see the controls or operate machine.
2. Before operating machine: – Check machine for fluid leaks. – Make sure all safety devices are in place and operate properly.
3. When operating machine: – Use only as described in this manual. – Report machine damage or faulty operation immediately. – Wear closed-toe, non-slip work shoes. – Reduce speed when turning. – Go slowly on inclines and slippery surfaces. – The machine may only be operated on gradients up to 2%. – Follow site safety guidelines concerning wet floors. – Follow mixing, handling and disposal instructions on chemical containers. – Do not carry passengers on machine. – Use care when reversing machine. – Keep children and unauthorized persons away from machine. – Do not allow machine to be used as a toy.
4. Before leaving or servicing machine: – Stop on level surface. – Set the parking brake, if equipped. – Turn off machine and remove key.

Nobles Speed Scrub 500 (11-2022)

5

5. When servicing machine: – Disconnect battery connection and charger cord before working on machine.
– All work must be done with sufficient lighting and visibility.
– All repairs must be performed by trained personnel.
– Use Tennant supplied or approved replacement parts.
– Do not modify the machine from its original design.
– Block machine tires before jacking machine up.
– Jack machine up at designed locations only. Support machine with jack stands.
– Use hoist or jack that will support the weight of the machine.
– Avoid moving parts. Do not wear loose clothing or jewelry and secure long hair.
– Do not disconnect the off-board 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 cycle, disconnect the AC power supply cord first.
– Do not use incompatible battery chargers as this may damage battery packs and potentially cause a fire hazard.
– Inspect charger cord regularly for damage.
– Keep work area well ventilated. – Avoid contact with battery acid.
– Keep all metal objects off batteries. – Do not power spray or hose off machine.
Electrical malfunction may occur. Use damp cloth.
– Use a hoist or adequate assistance when lifting batteries.
– Battery installation must be done by trained personnel.
– Only use distilled water when filling the automatic battery watering tank.
– Wear personal protection equipment as needed and where recommended in this manual.
For Safety: wear protective gloves.
For Safety: wear eye protection.

SAFETY
6. When loading/unloading machine onto/off truck or trailer: – Drain tanks before loading machine. – Use a ramp that can support the machine weight and operator. – The machine may only be operated on gradients up to 2%. – Lower the scrub head and squeegee before tying down machine. – Turn machine off and remove key. – Set parking brake (if equipped). – Block machine wheels. – Use tie-down straps to secure machine.

6

Nobles Speed Scrub 500 (01-2017)

SAFETY
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.

WARNING LABEL Spinning brush. Keep hands away. Located on scrub head.
WARNING LABEL Batteries emit hydrogen gas. Explosion or fire can result. Keep sparks and open flame away when charging. Located on bottom side of recovery tank.
Nobles Speed Scrub 500 (01-2017)

WARNING LABEL Electrical hazard. Disconnect battery cables before servicing machine. Located on circuit breaker panel.
7

OPERATION MACHINE COMPONENTS

23

24

2

3

1

5 6

9

10

13 14
15

26 25 27
4 8 34
7
230
11 12 16 17
18

29
28 31 32 33
35

21

19

20

36 22

8

Nobles Speed Scrub 500 (11-2022)

MACHINE COMPONENTS

1. Control handle 2. Control handle start bail 3. Control panel 4. Forward/Reverse lever 5. Speed control knob 6. USB port (Service only) 7. Key switch 8. Transport tie-down bracket 9. Emergency shut-off button 10. Hour meter 11. Solution tank rear hose fill-port 12. Solution tank level/drain hose 13. Recovery tank drain hose 14. Circuit breaker panel 15. On-board battery charger 16. On-board battery charger cord hooks 17. On-board battery charger cord 18. Off-board battery charger receptacle
SCRUB HEAD TYPES

OPERATION

19. Squeegee lower/lift foot pedal 20. Squeegee assembly 21. Squeegee vacuum hose 22. Squeegee debris/drip tray 23. Recovery tank 24. ec-H2O module (option) 25. ec-H2O water conditioning cartridge 26. Battery compartment 27. Automatic battery watering tank (option) 28. Solution tank 29. Solution tank front bucket fill-port 30. Scrub head 31. Scrub head skirt 32. Pad release plunger 33. Wall rollers 34. Parking brake (option) 35. Recovery tank lid 36. Recovery tank float shut-off screen

26 in / 650 mm Dual Disk 28 in / 700 mm Dual Disk 32 in / 800 mm Dual Disk

28 in / 700 mm Cylindrical Brush

28 in / 700 mm Orbital Pad

Nobles Speed Scrub 500 (11-2022)

9

OPERATION

CONTROL PANEL COMPONENTS

1 2

4

3

5

9

1. 1-Step button 2. Brush pressure button 3. Brush pressure indicator 4. Solution flow button 5. Solution flow indicator 6. Service Indicator 7. Battery discharge indicator (BDI) 8. ec-H2O button / indicator (option) 9. Automatic battery watering indicator (option) 10. Cloud Connectivity indicator (option) 11. Parking Brake indicator (option)

6

11

7

8

10

MACHINE SYMBOLS
Read Manual Fast speed (drive model) Slow speed (drive model) Forward / Reverse (drive model)

Key On Key Off ec-H2O scrubbing (option) Battery charge

Do not power spray

10

Parking brake (option) Automatic Battery Watering Tank (Option) No detergent (ec-H2O option) Water temperature (ec-H2O option) Circuit breaker Cloud Connectivity (Telemetry option)
Nobles Speed Scrub 500 (11-2022)

INSTALLING BATTERIES
WARNING: Batteries emit hydrogen gas. Explosion or fire can result. Keep sparks and open flame away when charging.
FOR SAFETY: When servicing machine, wear appropriate personal protection equipment as needed. Avoid contact with battery acid.
BATTERY SPECIFICATIONS Requires four 6 volt deep-cycle batteries, 260 Ah @ 20 hr or two 12V TPPL batteries. Contact distributor or Tennant for battery recommendations. FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped.
1. Lift the recovery tank to access the battery compartment (Figure 1).

FIG. 1
2. Carefully install the batteries into the battery compartment tray and arrange the battery posts as shown (Figures 2 & 3). Position foam spacer(s) as shown. Using the supplied battery post boots, connect the cables to battery posts, RED TO POSITIVE (+) & BLACK TO NEGATIVE (-).
FOR SAFETY: When servicing machine, use a hoist or adequate assistance when lifting batteries.
4x6V Standard Batteries

FOAM SPACER

RED

BLACK

FIG. 2 Nobles Speed Scrub 500 (09-2020)

FOAM SPACER

OPERATION
2x12V TPPL Batteries
BLACK
RED
FOAM SPACER
BLACK
RED
FIG. 3
IMPORTANT: Before charging batteries, make sure the battery charger and the machine’s battery discharge indicator are properly set for battery type. Failure to properly set will result in battery damage. See BATTERY CHARGER SETTINGS. ATTENTION: Do not disconnect battery cables while charger is plugged in, circuit board damage may result. IRIS® Battery Charging Metrics Notification: Machines equipped with capability to report battery charging data via IRIS are supplied with a charger and set of batteries from the factory. When a battery reaches its end of life and must be replaced, Tennant highly recommends that the same battery type be used to continue to maximize the machines performance. In the event a battery with a different amp hour (AH), type (Flooded, AGM, Gel, TPPL), or manufacturer is selected for replacement please contact Tennant technical service department for assistance in determining the feasibility of the replacement batteries and if so, selecting the correct charging profile. Availability of IRIS battery metric reporting is not guaranteed with third party supplied batteries.
HOW THE MACHINE WORKS
Conventional scrubbing: When using the conventional scrubbing mode, water and detergent mixture from the solution tank flows to the floor and the rotating brush(es)/pad(s) scrub the floor clean. As the machine moves forward, the squeegee with vacuum suction picks up the dirty solution from the floor into the recovery tank.
ec-H2O NanoClean Technology (option): When using the ec-H2O NanoClean technology, normal water passes through a module where it is electrically converted into a cleaning solution. The electrically converted water attacks the dirt, allowing the machine to easily scrub away the suspended soil. The converted water then returns to normal water in the recovery tank.
11

OPERATION

BRUSH AND PAD INFORMATION
For best cleaning results use the appropriate brush or pad for your cleaning application. Listed below are brushes and pads and the applications for which each is best suited.
NOTE: The amount and type of soilage play an important role in determining the type of brush or pad to use. Contact a Tennant representative for specific recommendations.
Soft nylon bristle scrub brush (White) Recommended for cleaning coated floors without removing finish. Cleans without scuffing.
Polypropylene bristle scrub brush (Black) This general purpose polypropylene bristle scrub brush is used for scrubbing lightly compacted soilage. This brush works well for maintaining concrete, wood and grouted tile floors.
Super abrasive bristle scrub brush (Gray) Nylon fiber impregnated with abrasive grit to remove stains and soilage. Strong action on any surface. Performs well on buildup, grease, or tire marks.
Polishing pad (White) Used to maintain highly polished or burnished floors.
Buffing pad (Red) – Used for light duty scrubbing without removing floor finish.
Scrubbing pad (Blue) – Used for medium to heavy-duty scrubbing. Removes dirt, spills, and scuffs and leaves surface clean ready for re-coating.
Stripping pad (Brown) – Used for stripping of floor finish to prepare the floor for recoating.
Heavy duty stripping pad (Black) – Used for aggressive stripping of heavy finishes/sealers, or very heavy duty scrubbing.
Surface preparation pad (Maroon) – Used for very aggressive chemical free removal of floor finish to prepare the floor for re-coating.
Turf scrubbing pad (Green) – Used to scrub uneven floor surfaces with crevices, cracks and deep grout lines.

MACHINE SETUP
ATTACHING SQUEEGEE ASSEMBLY FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped. 1. Lift the squeegee mount bracket to the raised
position. Place foot under pedal to lift (Figure 4).
FIG. 4
2. Mount the squeegee assembly to the squeegee mount bracket (Figure 5). Tighten knobs to secure squeegee assembly to bracket.
FIG. 5
3. Connect the vacuum hose to the squeegee assembly (Figure 6).

FIG. 6

12

Nobles Speed Scrub 500 (01-2017)

5. Check the squeegee blades for proper deflection. The blades should deflect as shown (Figure 7).

OPERATION
FOR SAFETY: Do not operate machine with pads or accessories not supplied or approved by Tennant. The use of other pads may impair safety.
3. Set the yellow spring clips to the open position to make brush installation easier. Press clips down and outward to set (Figure 10).

FIG. 7
6. To adjust the blade deflection, loosen the jam nut and turn the caster hex plate until there is a 1/16″ (2mm) space between caster and floor. Re-tighten jam nut and repeat step on other caster (Figure 8).
Jam Nut
1/16 in 2 mm

FIG. 10
4. Align the pad driver or brush under the motor hub and push it upward to engage hub (Figure 11). Replace pads or brushes when they no longer clean effectively or when the bristles on the brush disk are worn to the yellow indicator (Figure 11).

Caster hex plate

FIG. 8
INSTALLING DISK BRUSHES/PADS (Disk Scrub Head Model)
1. Raise scrub head off floor and remove key. FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped. 2. Attach the pad to the pad driver before installing
the driver. Secure pad with center-lock (Figure 9).

FIG. 11
5. To remove the pad drivers/brushes, raise the scrub head and press down on the yellow pad release plunger (Figure 12). Pad will drop to floor.

FIG. 9 Nobles Speed Scrub 500 (01-2017)

FIG. 12
13

OPERATION

INSTALLING ORBITAL PADS (Orbital Scrub Head Model) For best cleaning performance and to avoid damaging the pad driver plate or floor surface, always use backer pad with working pads (Figure 13).
Orbital scrub head
Pad driver plate
Backer pad
Working pad
FIG. 13
1. Raise scrub head off floor and remove key. FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped. FOR SAFETY: Do not operate machine with pads or accessories not supplied or approved by Tennant. The use of other pads may impair safety. 2. Attach backer pad, retaining strips facing
downward, to working pad (Figure 14).

INSTALLING CYLINDRICAL BRUSHES (Cylindrical Brush Scrub Head Model) 1. Raise scrub head off floor and remove key. FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped. 2. Unfasten yellow latch and remove the idler plate
from the scrub head (Figure 16).
FIG. 16
3. Attach idler plate to brush end with double row of bristles (Figure 17).
Double row of bristles

FIG. 14
3. Attach the two pads to the bottom of the scrub head (Figure 15). Make sure pad is centered on scrub head.

FIG. 17
4. Guide brush onto the drive hub and refasten latch (Figure 18).
Double row of bristles

FIG. 15
14

FIG. 18 Nobles Speed Scrub 500 (01-2017)

FILLING SOLUTION TANK
FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped.
The machine is equipped with two solution tank fill-port locations. A front bucket fill-port and a rear hose fill-port (Figure 19).

OPERATION2. Replace the front and rear fill-port cover after filling solution tank (Figure 21).

FIG. 19
1. Fill the solution tank with water until level reaches the “3/3” mark on the solution tank drain hose indicator (Figure 20).
ec-H2O Scrubbing (Option)- Fill solution tank with only cool clean water (less than 70°F/21°C). Do not add conventional floor cleaning detergents. An ec-H2O system fault will occur if cleaning detergents are added.
Conventional Scrubbing – Fill solution tank with water (not to exceed 60°C/140°F). Pour a recommended cleaning detergent into the solution tank according to mixing instructions on the container.
ATTENTION: For Conventional Scrubbing, only use commercially approved cleaning detergents. Machine damage due to improper detergent usage will void the
manufacturer’s warranty.
WARNING: Flammable materials can cause an explosion or fire. Do not use flammable materials
in tank(s).
NOTE: Do not use the ec-H2O system when there are conventional cleaning detergents in the solution tank. Drain, rinse, and refill the solution tank with clear cool water before operating the ec-H2O system. Conventional cleaning detergents will cause an ec-H2O system fault.

FIG. 21
FILLING AUTOMATIC BATTERY WATERING TANK (OPTION) FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped. 1. Lift the recovery tank to access the automatic
battery watering tank (Figure 22). Drain recovery tank before lifting tank.
FIG. 22
2. Remove the blue cap from the automatic battery watering tank (Figure 23).
3. Pour distilled water into tank (Figure 23). FOR SAFETY: When operating machine, only use distilled water when filling the automatic battery watering tank.

FIG. 20 Nobles Speed Scrub 500 (09-2020)

FIG. 23
15

OPERATION
4. When the tank needs refilling, the automatic battery watering indicator will alert user to add distilled water (Figure 24). See CONTROL PANEL OPERATION for further details.
FIG. 24
ec-H2O WATER CONDITIONING CARTRIDGE (ec-H2O MODEL) The ec-H2O system is equipped with a water conditioning cartridge (Figure 25). The cartridge is designed to protect the machine’s plumbing system from potential scaling. The cartridge is required to be replaced when it reaches its maximum water usage or expiration time on when the cartridge was activated, which ever comes first. Depending on machine usage a new cartridge can last anywhere from 12 to 24 months.

All cartridges are labeled with a manufacture date. The shelf-life of an un- installed cartridge is one year from manufacture date. For new cartridge replacement, the ec-H2O module timer must be reset. See ec-H2O WATER CONDITIONING CARTRIDGE REPLACEMENT.
ATTENTION: During first time use and after replacing the water conditioning cartridge, the ec-H2O system will automatically override the selected solution flow rate for up to 75 minutes.
CONTROL PANEL OPERATION
1-STEP BUTTON With key turned on, press the 1-STEP button to activate the scrub function (Figure 27). The scrub head will lower to floor. Press button again to stop the scrub function and to raise scrub head.

FIG. 25
The control panel will signal the following code when it’s time to replace the cartridge (Figure 26). The ec-H2O icon will begin to blink blue and red. See SERVICE INDICATOR CODES for further details.

FIG. 27
BRUSH PRESSURE BUTTON
Press the brush pressure button to increase or decrease the brush pressure (Figure 28). The brush pressure indicator will display the pressure setting. One LED = Low pressure, two LED’s = High pressure.

FIG. 26
16

FIG. 28
NOTE: Orbital scrub head model – If brush pressure is set too high for scrubbing conditions, the brush pressure setting will automatically reduce to a lower setting and begin flashing. The flashing LED alerts the operator to reduce the brush pressure setting to prevent brush motor overload.
Nobles Speed Scrub 500 (11-2022)

SOLUTION FLOW BUTTON
Press the solution flow button to increase or decrease the solution flow rate (Figure 29). The solution flow indicator will display flow setting. No LED = No flow, One LED = Low flow, two LED’s = Medium flow, three LED’s = High flow.

OPERATION
SERVICE INDICATOR When the machine or on-board battery charger detects a fault, the service indicator will light up and begin flashing (Figure 31). The battery discharge indicator lights will also flash a fault code. See SERVICE INDICATOR CODES to diagnose machine fault.

FIG. 29
ec-H2O BUTTON / INDICATOR (Option)
The ec-H2O system automatically turns on at each key start. A blue ec-H2O indicator appears when machine is equipped with the ec-H2O option. The green LED illuminates when ec-H2O is activated. To turn off the ec-H2O system, press the ec-H2O button. The green LED indicator will disappear (Figure 30).

FIG. 30

ec-H2O INDICATOR Solid blue Blinking blue/red
Solid or blinking red

CONDITION
Normal operation
Water conditioning cartridge expired. Replace cartridge.
A system fault has occurred. See Service Indicator Codes.

NOTE: If a fault occurs to the ec-H2O system, the machine will automatically turn off the ec-H2O system and convert over to conventional scrubbing. The service indicator icon will remain solid red or continue to blink red until the ec-H2O fault is serviced.

FIG. 31
PARKING BRAKE INDICATOR (Option) Lights up when parking brake lever is engaged. To turn off indicator, disengage parking brake lever near left rear wheel (Figure 32).
FIG. 32
BATTERY DISCHARGE INDICATOR The battery discharge indicator (BDI) displays the charge level of the batteries while the machine is operating. When the batteries are fully charged, all five indicators are lit (Figure 33). When the discharge level reaches the red light, stop scrubbing and recharge the batteries. When the red light begins to flash, the scrub function will be disabled to protect the batteries from total discharge. The machine will still propel when the red light is flashing. This will allow user to transport the machine to the charging station.
FIG. 33

Nobles Speed Scrub 500 (11-2022)

17

OPERATION
AUTOMATIC BATTERY WATERING INDICATOR (Option)
The automatic battery watering indicator will flash when the battery watering tank is empty and needs refilling (Figure 34).
To protect the batteries from damage, the machine’s scrub function will be disabled after 10 hours of continued use if tank is not refilled. When the indicator flashes rapidly, the scrub function will be disabled. Add distilled water and restart key to clear the flashing indicator. See FILLING AUTOMATIC BATTERY WATERING TANK.

ABW INDICATOR Flashing Solid
Flashing rapidly

FIG. 34
CONDITION
Empty ABW tank. Refill tank and restart key.
ABW system attempted to water batteries but batteries are already full or watering hose is kinked. Check for kink. Restart key.
Empty ABW tank has been empty too long and scrub function has been disabled. Refill tank and restart key.

MACHINE OPERATION
FOR SAFETY: Do not operate machine unless operator manual is read and understood.
PRE-OPERATION CHECK LIST
Sweep area and remove any obstructions. Check brushes/pads for wear and damage. Check squeegee blades for wear and damage. Confirm recovery tank is empty, debris tray is clean
and the float shut-off screen is installed and clean. Check scrub head skirt for wear and damage. Cylindrical brush model – confirm debris trough is
empty and clean. ec-H2O Scrubbing: Confirm solution tank is filled
with clear cool water only. ec-H2O Scrubbing: Confirm all conventional
cleaning agents/restorers are drained and rinsed from solution tank. Check machine for proper operation.
OPERATING MACHINE
For control panel operating instructions, see CONTROL PANEL OPERATION. 1. Release the parking brake lever, if equipped
(Figure 35)
2. Turn the key to the on ( I ) position (Figure 35).

FIG. 35

18

Nobles Speed Scrub 500 (11-2022)

3. ec-H2O models – The ec-H2O system automatically turns on at each key start. A blue ec-H2O indicator appears when machine is equipped with the ec- H2O option. The green LED illuminates when ec-H2O is activated. To turn off the ec-H2O system, press the ec-H2O button. The green LED indicator will disappear (Figure 36).
ATTENTION: When conventional scrubbing with cleaning detergents in solution tank, make sure to turn off the ec-H2O system by pressing the ec-H2O button (Figure 36). If cleaning detergent is accidentally cycled through ec-H2O system, a system fault will occur. To clear fault, drain solution tank, add clear water and operate the ec-H2O system to clear fault. If fault repeats, continue to recycle key until fault clears. See SERVICE INDICATOR CODES for further detail.

OPERATION
FIG. 38
6. Push the directional lever forward to go forward (Figure 39). Pull the lever back to maneuver machine in reverse. Lift squeegee assembly when backing machine.

FIG. 36
4. Lower the squeegee assembly to floor by stepping on foot pedal (Figure 37). To raise squeegee assembly, place foot under foot pedal and lift. The vacuum motor will automatically start when squeegee is lowered to floor.

FIG. 39
7. To begin scrubbing, pull the start bail (Figure 40).

FIG. 37
5. Press the 1-STEP button to activate the scrub function (Figure 38). The scrub head will lower to floor.

FIG. 40

Nobles Speed Scrub 500 (11-2022)

19

OPERATION
8. Adjust the scrubbing speed by turning the speed dial to the desired speed (Figure 41).
FIG. 41
9. To stop scrubbing, release the start bail, press the 1-STEP button and raise the squeegee assembly off floor. Turn key off and set parking brake, if equipped.
NOTE: To pick up any remaining water left on floor after scrub head is raised continue to drive machine forward with squeegee down.
EMERGENCY SHUT-OFF BUTTON Push the emergency shut-off button in the event of an emergency (Figure 42). This red button shuts off all power to machine. To regain power, turn the button clockwise and restart the key.

WHILE OPERATING MACHINE
WARNING: Flammable materials or reactive metals can cause an explosion or fire. Do not pick up.
1. Overlap each scrub path by 2 inches/5 cm.
2. Keep machine moving to prevent damage to floor finish.
3. Wipe squeegee blades with a cloth if blades leave streaks.
4. Avoid bumping the machine into posts and walls.
5. When draining and refilling machine, always top off the optional Severe Environment tank with detergent.
FOR SAFETY: When operating machine, the machine may only be operated on gradients up to 2%.
6. Pour a recommended foam control solution into the recovery tank if excessive foam appears.
ATTENTION: Foam buildup will not activate the float shut-off screen, vacuum motor damage will result.
7. Use the double scrubbing method for heavily soiled areas. First scrub the area with the squeegee up, let solution set for 3-5 minutes, then scrub the area a second time with squeegee down.
8. Orbital Scrub Head Model – Use caution when working near the tile cove (Figure 43) and floor mounted fixtures such as pedestal sinks and other breakable items. Keep the metal scrub head edge away to avoid possible damage.

FIG. 42
20

Tile Cove
FIG. 43
9. When leaving the machine unattended, park on level surface, turn machine off, remove key and set the parking brake, if equipped.
10. Do not operate machine in areas where the ambient temperature is above 110ºF/43ºC or below freezing 36ºF/2ºC.
Nobles Speed Scrub 500 (11-2022)

CIRCUIT BREAKER PANEL
The machine is equipped with resettable circuit breakers to protect the machine from a current overload (Figure 44). If a circuit breaker trips, disconnect the battery cable connection and reset the breaker by pressing the reset button after the breaker has cooled down. Reconnect the battery cable connection. If the circuit breaker does not reset or continues to trip contact service personnel.

OPERATION
HOUR METER The hour meter records the number of hours the machine has been operated. Use the hour meter to perform specific maintenance procedures and to record service history (Figure 45).

Circuit Breaker
CB1 CB2
CB3 CB4 CB5 CB6 CB7

FIG. 44

Rating 4A 10 A
10 A 20 A 25 A 25 A 60 A

Circuit protected
Key switch, circuit ec-H2O system, automatic battery watering system Scrub head lift actuator Vacuum motor Left brush motor Right brush motor Propel

FOR SAFETY: When servicing machine, all repairs must be performed by trained personnel.

FIG. 45
DRAINING TANKS
FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped.
DRAINING RECOVERY TANK Drain and clean the recovery tank after each use. 1. Transport the machine to drain area. 2. Remove the recovery tank drain hose from storage
hook and pinch hose as shown (Figure 46). Over a drain basin, remove cap and slowly release the pinched hose to drain.

Nobles Speed Scrub 500 (11-2022)

FIG. 46
NOTE: When using a bucket to drain the machine, do not use the same bucket to fill the solution tank.
21

OPERATION
3. Remove and clean the float shut-off screen (Figure 47).

3. Rinse solution tank with clean water (Figure 50).

FIG. 47
4. Rinse out the recovery tank with clean water and wipe clean of any soil residue (Figure 48).

FIG. 50
4. Remove the solution tank filter and clean screen after every 50 hours of use (Figure 51). Solution filter is located under machine at rear. Drain solution tank before removing filter.

FIG. 48
DRAINING SOLUTION TANK Drain the solution tank daily. 1. Transport the machine to drain area.
FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped.
2. To drain remaining water from solution tank, pull the solution tank level hose from the accessory rail (Figure 49). Firmly reconnect the hose to the accessory rail after draining tank.

FIG. 51

FIG. 49
22

Nobles Speed Scrub 500 (01-2017)

OPERATION
SERVICE INDICATOR CODES
When the machine or battery charger detects a fault, the service indicator will flash. A fault code will be provided to determine problem as described below.

Flashing service indicator

Flashing LED fault code

LED Fault Code
= Flashing S S S S S S S S SS S S S S S S S S S S S S S S S S S S S S S S S
S S

CAUSE Emergency shut-off button activated
Head lift actuator relay wiring problem
Solution valve wiring, connector or control board problem Solution valve over current.
Brush motor relay wiring, connector or control board problem Head lift actuator relay wiring, connector or control board problem Propel circuit breaker tripped
Propel motor wiring, connector or control board problem Propel faults
Battery watering pump wiring, connector or control board problem. Brush motor relay short fault
Start bail is pulled or obstructed before turning machine on. Battery watering pump board fault ec-H2O pump control board fault Battery watering system fault
Charger communication fault Scrub control board communication fault ec-H2O system communication fault Battery watering CAN fault

SOLUTION Release emergency shut-off button and restart machine Check connections. Contact service.
Check connections. Contact service
Contact service
Contact service
Contact service
Reset circuit breaker. If fault repeats, contact service. Contact service
Restart machine. If fault repeats, contact service. Contact service
Check pad for floor type. If fault repeats contact service. Release start bail or remove bail obstruction before turning machine on. Disconnect battery cable connection and contact service to replace control board. Contact service
Restart. If fault repeats, contact service.

Nobles Speed Scrub 500 (11-2022)

23

OPERATION

ON-BOARD BATTERY CHARGER SERVICE INDICATOR CODES

LED Fault Code
= Flashing S S S S S
SS S S

CAUSE Charger error condition. Charger timer exceeded maximum charging time. Interrupts charging cycle. Charger is not connected to battery pack
Charger overheated

S S Charger communication fault

SOLUTION Contact service Replace batteries
Check cable connections
Let charger cool. Move to well ventilated area. Charge batteries in areas with temperatures 80F/27C or less. If fault persists, contact service. Restart charger. If fault code persists, contact service.

ec-H2O SYSTEM SERVICE INDICATOR CODES – OPTION

Flashing service indicator

Flashing LED fault
code

Solid or blinking Red
ec-H2O indicator

LED Fault Code
= Flashing S S
S S S
S S S S S
SS S

CAUSE ec-H2O system communication fault.
ec-H2O pump wiring, connector or control board problem. ec-H2O pump over current
ec-H2O pump shorted fault
ec-H2O circuit breaker tripped

ecH2O indicator solid red
ecH2O indicator
blinking red*
ecH2O indicator blinking blue/red

ec-H2O electrical fault ec-H2O system water and plumbing fault Water system conditioning cartridge expired

SOLUTION Restart. If fault code persists, contact service. Contact service
Contact service Contact service Reset circuit breaker. If trip repeats, contact service. Contact service
Contact service
Replace water conditioning cartridge.

*Verify if cleaning detergent was added to solution tank. If ec-H2O system was operated with cleaning detergent,
drain solution tank, add clear water and operate the ec-H2O system until the fault code clears. If fault repeats, continue to recycle key until fault clears.

24

Nobles Speed Scrub 500 (11-2022)

MAINTENANCE CHART
3

MAINTENANCE

11

5

7

4

6

2 13

8 14

13
1 Interval Daily

13

10
12
1 9

Person
Resp. Key

Description

O

1 Pads

O

1 Brushes

O

2 Cylindrical brushes

O

3 Recovery tank

O

O

O

O

O

O

Weekly

O

O

50 Hours

O

O

O

O

100 Hours

O

200 Hours

O

750 Hours

T

1250 Hours T

T

T

4 Solution tank 5 Automatic battery watering tank (option) 6 Squeegee 7 Batteries 8 Debris trough 9 Scrub head skirt 7 Battery cells 6 Squeegee assembly drip trap reservoir 2 Cylindrical brushes. 2 Cylindrical scrub head 3 Recovery tank lid seal 10 Solution tank filter 7 Battery watering system (option) 7 Batteries, terminals and cables 11 Vacuum motor 12 Propel motor 13 Brush motor 14 Brush belt

O = Operator T = Trained Personnel

Procedure Check, flip or replace Check, clean Check, clean Drain, rinse, clean float shut-off screen and debris tray Drain, rinse Check, refill Clean, check for damage and wear Charge if necessary Clean Check for damage and wear Check electrolyte level Check, clean Rotate brushes. Check for wear Clean underside of scrub head Check for wear. Remove and clean Check hoses for damage and wear Check and clean Replace carbon brushes Replace carbon brushes Replace carbon brushes Replace belt

Nobles Speed Scrub 500 (01-2017)

25

MAINTENANCE
MACHINE MAINTENANCE
To keep the machine in good working condition, simply perform the following maintenance procedures. FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped. FOR SAFETY: When servicing machine wear personal protection equipment as needed. All repairs must be performed by trained personnel
AFTER DAILY USE 1. Drain and rinse out the recovery tank (Figure 52).
See DRAINING TANKS.

4. Disk scrub head – Turn pad over or replace when worn (Figure 55).
FIG. 55
5. Replace brushes when they no longer clean effectively or when the bristles are worn to the yellow indicator (Figure 56).

FIG. 52
2. Remove and clean the float shut-off screen (Figure 53).

FIG. 56
Orbital scrub head – Turn the working pad over or replace when worn (Figure 57).

FIG. 53
3. Drain and rinse out the solution tank (Figure 54).

FIG. 57

FIG. 54
26

Nobles Speed Scrub 500 (09-2020)

6. Wipe the squeegee blades clean. Inspect blades for wear and damage (Figure 58). Rotate blade if
worn. See SQUEEGEE BLADE REPLACEMENT.

MAINTENANCE
9. Cylindrical brush scrub head – Remove and clean debris trough (Figure 61).

FIG. 58
7. Clean scrub head skirt. Check for wear or damage (Figure 59). Replace if worn or damaged.

FIG. 61
10. Automatic battery watering option – Refill tank with distilled water (Figure 62). Replace cap.

FIG. 59
8. Clean the outside surface of the machine with an all purpose cleaner and damp cloth (Figure 60).
FOR SAFETY: When servicing machine, do not power spray or hose off machine. Electrical malfunction may occur. Use damp cloth.

FIG. 62
11. Charge batteries (Figure 63). See BATTERIES.

FIG. 60

FIG. 63
ATTENTION: Do not disconnect battery cables while charger is plugged in, circuit board damage may result.

Nobles Speed Scrub 500 (09-2020)

27

MAINTENANCE
AFTER WEEKLY USE 1. Check the electrolyte level in all batteries (Figure
64). See BATTERIES. NOTE: If machine is equipped with the automatic or manual battery watering system, See BATTERIES.

2. Cylindrical brushes – Rotate brushes from front to rear (Figure 67). Replace brushes when they no longer clean effectively.

FIG. 64
2. Remove the drip trap cover from the squeegee assembly and clean reservoir (Figure 65).

FIG. 67
3. Cylindrical scrub head – Remove debris buildup from underside of scrub head, including the idler plates and drive hubs (Figure 68).

FIG. 65
AFTER EVERY 50 HOURS OF USE
1. Drain solution tank. Remove the solution tank filter and clean screen (Figure 66). Turn the filter bowl counter-clockwise to remove.

FIG. 68
AFTER EVERY 100 HOURS OF USE If machine is equipped with the optional battery watering system, check hoses for leaks, loose hose connections and for damage or wear (Figure 69). Replace system if damaged.
FOR SAFETY: When servicing batteries, wear personal protection equipment as needed. Avoid contact with battery acid.

FIG. 66
28

FIG. 69 Nobles Speed Scrub 500 (09-2020)

ELECTRIC MOTORS
Replace motor carbon brushes as indicated. Contact trained personnel for carbon brush replacement.

Carbon Brush Replacement Vacuum motor Propel motor Disk brush motors Cylindrical brush motors Orbital brush motor

Hours 750 1250 1250 1250 1250

BELTS (Cylindrical Brush Model)
FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped.
Replace belts every 1250 hours. Contact trained personnel for belt replacement (Figure 70).

FIG. 70

MAINTENANCE

Nobles Speed Scrub 500 (01-2017)

29

MAINTENANCE

BATTERIES
FOR SAFETY: Before servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped.
The lifetime of the batteries depends on their proper maintenance. To get the most life from the batteries;
S Do not charge standard wet lead-acid batteries more
than once a day and only after running the machine for a minimum of 15 minutes. TPPL batteries can be opportunity charged during the day to extend run time.
S Do not leave the batteries partially discharged for
long period of time.
S Only charge the batteries in a well-ventilated area to
prevent gas build up.
S Charge batteries in areas with temperatures between
32ºF/0ºC and 80ºF/27ºC.
S Allow the charger to complete charging the batteries
before re-using the machine.
S Maintain the proper electrolyte levels of flooded (wet)
batteries by checking levels weekly.
Your machine is equipped with either flooded (wet) lead-acid or maintenance- free (Sealed AGM/TPPL) batteries supplied by Tennant.
FOR SAFETY: When servicing machine, keep all metal objects off batteries. Avoid contact with battery acid.
MAINTENANCE-FREE BATTERIES
Maintenance-free (Sealed AGM/TPPL) batteries do not require watering. Cleaning and other routine maintenance is still required.
FLOODED (WET) LEAD-ACID BATTERIES The flooded (wet) lead-acid batteries require routine watering as described below. Check the battery electrolyte level weekly.
NOTE: If machine is equipped with the automatic or manual battery watering system, proceed to the BATTERY WATERING SYSYEM instructions.
The electrolyte level should be slightly above the battery plates as shown before charging (Figure 71). Add distilled water if low. DO NOT OVERFILL. The electrolyte will expand and may overflow when charging. After charging, distilled water can be added up to about 3 mm (0.12 in) below the sight tubes.

Before Charging

After Charging

FIG. 71
NOTE: Make sure the battery caps are in place while charging. There may be a sulfur smell after charging batteries. This is normal.
CHECKING CONNECTIONS / CLEANING (ALL BATTERY TYPES)
After every 200 hours of use, check for loose battery connections and clean the surface of the batteries, including terminals and cable clamps to prevent battery corrosion. Use a scrub brush with a strong mixture of baking soda and water (Figure 72). Do not remove battery caps when cleaning batteries.

FIG. 72
CHARGING BATTERIES
The charging instructions in this manual are intended for the battery charger supplied with your machine. The use of other battery chargers that are not supplied and approved by Tennant are prohibited.
If your machine is equipped with an off-board battery charger refer to the charger’s owners manual for operating instructions. Contact distributor or Tennant for battery charger recommendations if machine is not equipped with charger.

30

Nobles Speed Scrub 500 (09-2020)

FOR SAFETY: The use of incompatible battery chargers may damage battery packs and potentially cause a fire hazard.
IMPORTANT NOTICE: The battery charger is set to charge the battery type supplied with your machine. If you choose to change to a different battery type or capacity (i.e. flooded (wet) lead-acid, maintenance-free, sealed, AGM batteries, etc.), the charger’s charging profile must be changed to prevent battery damage. See BATTERY CHARGER SETTINGS.
1. Transport the machine to a well-ventilated area.
WARNING: Batteries emit hydrogen gas. Explosion or fire can result. Keep sparks and open flame away when charging.
2. Park the machine on a flat, dry surface, turn off machine and remove key.
FOR SAFETY: When servicing batteries, stop on level surface, turn off machine, remove key and set parking brake if equipped.
3. If the machine is equipped with flooded (wet) leadacid batteries check the battery electrolyte level weekly before charging. For models equipped with the automatic battery watering system, check if the automatic battery water tank needs refilling. Add distilled water if low.
4. For models equipped with an on-board charger, remove the charger’s power cord from the storage hooks and plug power cord into a properly grounded wall outlet (Figure 73).

MAINTENANCE
FIG. 74
5. The charger will automatically begin charging and and shut off when fully charged. The maximum charging cycle may take up to 6-12 hours depending on battery type. On-board battery charger: The battery discharge indicator lights will ripple back and forth during the charging cycle. When all five lights repeatedly flash two times, the charging cycle is complete (Figure 75).
FIG. 75
ATTENTION: Do not disconnect battery cables while charger is plugged in, circuit board damage may result. 6. After charging batteries unplug the power supply
cord and wrap cord around the cord hooks (Figure 76). For models equipped with an off-board charger, always disconnect the AC power supply cord first before disconnecting charger from machine (Figure 76).

FIG. 73
For models equipped with off-board chargers, first connect the charger’s DC cord into the machine’s battery charge receptacle then plug the AC power supply cord into a properly grounded wall outlet (Figure 74). Refer to the off-board battery charger’s owner manual for operating instructions.
FOR SAFETY: Do not disconnect the off-board 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.
Nobles Speed Scrub 500 (11-2022)

FIG. 76
31

MAINTENANCE
BATTERY CHARGER SETTINGS
The battery charger is set to charge the battery type supplied with your machine. If you choose to change to a different battery type or capacity, the charger’s charging profile must be changed to prevent battery damage. The machine’s battery discharge indicator (BDI) must also be reprogrammed to match battery type to prevent battery damage and/or short run-time.
NOTE: For machines shipped without batteries, the battery discharge indicator and the on-board battery charger are set for GEL batteries as the default. If you choose to use a different battery type, the settings must be changed as described as below.
NOTE: For models shipped without batteries and an Off-Board Charger, the off- board battery charger is set for wet lead-acid batteries from the factory. The machine’s battery discharge indicator is set for GEL batteries as the default. The battery discharge indicator must be reprogrammed to match charger settings, contact service.
IRIS MODELS: For models equipped with capability to report battery charging data via IRIS, Tennant recommends using the same battery type. If a different amp hour or battery type is desired, contact Tennant Service Department.
OFF-BOARD BATTERY CHARGER: To change the off-board battery charger settings, refer to the off-board charger’s owner manual.
To reprogram the machine’s battery discharge indicator (BDI), service application software is required, contact service.
ON-BOARD BATTERY CHARGER: To change the on-board battery charger settings, service application software required, contact service.
As an alternative, the charger profile may be manually changed. See CHANGING ON-BOARD BATTERY CHARGER SETTINGS. The battery discharge indicator will automatically reprogram to match battery type when the battery charger profile is changed.
NOTE: TPPL batteries come with an unique battery charger that is only used with TPPL batteries. It’s not intended to be changed.
CHANGING ON-BOARD BATTERY CHARGER SETTINGS To manually change the on-board battery charger settings for a different battery type, carefully follow instructions as described below :
NOTE: The manual method is only an alternative if unable to change setting by use of the Service Application Software performed by Service.
1. Disconnect the battery cable connection at machine (Figure 77).
32

FOR SAFETY: When servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped.
FIG. 77
2. Carefully peel back the charger display label to access the dial settings (Figure 78).

FIG. 78
3. Using a small standard screwdriver, turn the dial to the appropriate battery type according to the following chart (Figure 79).

FIG. 79

Dial Position

Battery Description Settings with AH Ranges

0

CAN-BUS setting*

1

Wet, Trojan 180-260 AH

2

Wet, Trojan 270-360 AH

3

Wet, Enersys/Tab 200-350 AH

4

AGM, Tianneng 180-260 AH

5

AGM, Discover 200-350 AH

6

Gel, Sonnenschein 80-150 AH

• The CAN-BUS setting, dial position “0”, is the software setting that is programmed to match battery type supplied with machine. When the dial is manually changed to a different setting, it should not be reset back to “0” otherwise battery damage may result. Service Application Software is required to reset dial back to “0”. Contact Service.

4. Re-apply the display label.

5. To set the BDI for the new battery type, plug the on-board battery charger cord into an electrical outlet. The machine’s software will automatically reprogram the BDI to the new battery type.

Nobles Speed Scrub 500 (09-2020)

MANUAL BATTERY WATERING SYSTEM (Trojan Battery OPTION)
The following instructions are for models equipped with the manual battery watering system option.
The optional manual battery watering system provides a safe and easy way to maintain the proper electrolyte levels in your batteries. It is designed exclusively for Trojan flooded (wet) lead-acid batteries.
Kit p/n 9021123

MAINTENANCE
3. If the level indicator has a low white float add water as described in the following instructions. (Figure 81).

Low Float = Add Water

High Float = Full

FIG. 81

4. Locate the battery fill hose coupler inside the battery compartment. Remove the dust cap and connect the hand pump hose (Figure 82).

FOR SAFETY: When servicing machine, wear personal protection equipment as needed. Avoid contact with battery acid.
Before using the battery watering system check hoses and connections for damage or wear.
1. Fully charge batteries prior to using the battery watering system. Do not add water to batteries before charging, the electrolyte level will expand and may overflow when charging.
2. After charging batteries, check the electrolyte level indicator on each battery cap. If any of the indicator floats are low, add water as described in the next step (Figure 80).

FIG. 82
5. Submerge the other end of the hand pump hose into a bottle of distilled water (Figure 83).

Distilled Water

FIG. 83

Level Indicator Float
FIG. 80

Nobles Speed Scrub 500 (11-2022)

33

MAINTENANCE
6. Squeeze the bulb on the hand pump hose until firm. The indicator float will rise when full (Figure 84).

Check the water level in the automatic watering tank periodically. Add distilled water when low (Figure 86).
FOR SAFETY: When servicing machine, only use distilled water when filling the automatic battery watering tank.

High Float = Full
FIG. 84
7. After adding water, replace the dust cap on the battery watering distribution hose and store the hand pump hose inside the machine’s battery compartment for future use.
AUTOMATIC BATTERY WATERING SYSTEM (Trojan Battery OPTION)
FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped.
The automatic battery watering system is designed to automatically refill the batteries after the machine reaches a limited number of charge cycles. Do not remove battery caps and manually add water to the batteries.
Check the automatic battery watering system for leaks, loose hose connections and for damage or wear. (Figure 85). Replace if damaged.

FIG. 86
The automatic battery watering indicator will also alert user to add distilled water when tank is empty (Figure 87). See CONTROL PANEL OPERATION for further details.
FIG. 87
To store machine equipped with the automatic battery watering system in freezing temperatures, see STORING MACHINE/FREEZE PROTECTION.

FIG. 85

34

Nobles Speed Scrub 500 (11-2022)

SQUEEGEE BLADE REPLACEMENT
FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped.
Each squeegee blade has four wiping edges. When the blades become worn, simply rotate the blades end-for-end or top-to-bottom for a new wiping edge. Replace blade if all four edges are worn.
1. Remove the squeegee assembly from the machine.
2. Fully loosen the two outside knobs on squeegee assembly. This will separate the spring loaded blade retainer from squeegee frame (Figure 88). To loosen the knobs quickly, squeeze the blade retainer and squeegee frame together.

MAINTENANCE
4. Rotate the rear blade to a new wiping edge and reinstall blade (Figure 90). Make sure to align the slots in the blade with retainer tabs.
FIG. 90
5. Squeeze the squeegee frame and blade retainer together and re-tighten the two outside knobs (Figure 91).

FIG. 88
3. Remove worn blade(s) from the blade retainer (Figure 89).

FIG. 91

FIG. 89

Nobles Speed Scrub 500 (01-2017)

35

MAINTENANCE
ec-H2O WATER CONDITIONING CARTRIDGE REPLACEMENT
FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped. The water conditioning cartridge is required to be replaced when it reaches its maximum water usage or expiration time of when the cartridge was activated, which ever comes first. The control panel will signal a code when it’s time to replace cartridge. See CONTROL PANEL OPERATION for further details. Depending on machine usage, on average, a new cartridge can last anywhere from 12 months for heavy machine usage to 24 months for light machine usage. ATTENTION: During first time use and after replacing the water conditioning cartridge, the ec-H2O system will automatically override the selected solution flow rate for up to 75 minutes. 1. Park the machine on a level surface, remove the
key and set parking brake, if equipped. 2. Lift the recovery tank to access the ec-H2O water
conditioning cartridge (Figure 92). Drain recovery tank before lifting tank.
FIG. 92
3. Disconnect the two hose connectors from the top of the cartridge by pressing the gray collars inward and pulling the connectors outward (Figure 93). Lift cartridge to remove.
Gray Collar

4. Fill in the installation date on the new cartridge label (Figure 94).

FIG. 94
5. Install the new cartridge and reconnect the two hoses. Make sure the hose connectors are fully inserted into the cartridge.
6. Reset timer for new cartridge.
Carefully read and understand all steps first before performing procedure.
a. Turn key on. b. Press and hold the service switch, located on
the ec-H2O module, for 10 seconds. After releasing service switch, the three solution flow indicator lights will begin to (ripple) move back and forth (Figure 95). c. Within 5 seconds after releasing the service switch, while the three indicator lights are moving back and forth, quickly press and release the solution flow button located on ec-H2O module (Figure 95). The three indicator lights will then blink three times to indicate timer has been reset. Repeat process if the three indicator lights do not blink three times.

Service switch

3 indicator lights

Solution flow button

FIG. 95

FIG. 93
36

Nobles Speed Scrub 500 (01-2017)

MAINTENANCE

MACHINE JACKING
FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn off machine, remove key and set parking brake if equipped. Use the designated locations to jack up the machine for service (Figure 96). Empty the recovery and solution tanks and position the machine on a level surface before jacking. FOR SAFETY: When servicing machine, jack machine up at designated locations only. Support machine with jack stands. Use jack or hoist that will support the weight of the machine.
FIG. 96

TRANSPORTING MACHINE
When transporting the machine by use of trailer or truck, carefully follow loading and tie-down procedure:
1. Drain tanks, raise the scrub head and the remove squeegee assembly.
2. Carefully load machine in trailer or on truck.
FOR SAFETY: When loading/unloading, use a ramp that can support the machine weight and operator.
FOR SAFETY: When loading/unloading, the machine may only be operated on gradients up to 2%.
3. Once loaded, position the front of the machine up against the front of the trailer or truck. Lower the scrub head, turn key off and set parking brake, if equipped.
4. Place a block behind each wheel (Figure 97).
5. Using tie-down straps, secure the machine using the four tie-down brackets located on the machine frame (Figure 97). It may be necessary to install tie- down brackets to the floor of your trailer or truck.
NOTE: When transporting machine in an open truck or trailer, secure recovery tank lid.
ATTENTION: Do not use control console area or accessory storage rails for tie- down locations, damage may occur.

FIG. 97

Nobles Speed Scrub 500 (01-2017)

37

MAINTENANCE
STORING MACHINE
The following steps should be taken when storing the machine for extended periods of time. 1. Charge the batteries before storing machine to
prolong the life of the batteries. Recharge batteries once a month. 2. Disconnect batteries before storing. 3. Drain and rinse recovery tank and solution tank. 4. Store the machine in a dry area with squeegee and scrub head in the up position. ATTENTION: Do not expose machine to rain, store indoors. 5. Open the recovery tank lid to promote air circulation. 6. If storing machine machine in freezing temperatures, proceed to FREEZE PROTECTION. NOTE: To prevent potential machine damage store machine in a rodent and insect free environment.
FREEZE PROTECTION Storing machine in freezing temperatures. 1. Completely drain solution tank and recovery tank. 2. Empty the water from the solution tank filter located
under machine. Replace filter (Figure 98).

Models equipped with ec-H2O system – Turn machine and set the solution flow rate on and operate ec-H2O scrubbing to cycle antifreeze through system. Turn machine off when antifreeze is visible on the floor. This may take up to two minutes. 5. Models equipped with optional automatic battery watering tank – Lift tank from machine and empty the water from tank (Figure 99).
FIG. 99
Drain remaining water from system by removing the drain hose cap located below the tank (Figure 100). Leave cap off tank when draining system. After draining, replace cap on drain hose. IMPORTANT: DO NOT add antifreeze to the automatic battery watering tank.

FIG. 98
3. Pour 1 gallon / 4 liters of propylene glycol based recreational vehicle (RV) antifreeze into the solution tank.
4. Models not equipped with ec-H2O system – Turn machine on and operate the solution flow system. Turn the machine off when the antifreeze is visible on the floor.

FIG. 100
6. After storing machine in freezing temperatures, drain any remaining antifreeze from the solution tank. Add clean water to solution tank and to optional detergent tank and operate the machine to flush system.
7. Refill the automatic battery watering tank with distilled water, if equipped.

38

Nobles Speed Scrub 500 (09-2020)

MAINTENANCE

TROUBLESHOOTING

PROBLEM Service indicator icon is flashing ec-H2O icon is red or flashing red Machine will not operate
On-board battery charger will not operate
Machine will not propel
Brush motor will not operate
Vacuum motor will not operate
Poor scrubbing performance

CAUSE Machine or on-board battery charger fault has been detected ec-H2O system fault has been detected Emergency shut-off button activated Machine fault detected Batteries discharged Loose battery cable(s) Faulty battery(s) Faulty key switch Faulty start bail switch Circuit breaker tripped Faulty control board Plug not connected to power supply Batteries over discharged Battery charger fault detected Faulty charger Faulty power supply cord Propel fault has been detected Circuit breaker tripped Faulty propel motor or wiring Worn carbon brushes in motor Brush motor fault has been detected. Faulty pad motor or wiring Circuit breaker tripped Worn carbon brushes in motor Broken or loose belt (cylindrical brush model) Squeegee assembly is raised off floor Vacuum motor fault has been detected Faulty vacuum motor or wiring Circuit breaker tripped Debris caught in brush/pad Worn brush/pad Incorrect brush pressure Wrong brush/pad type Low battery charge Uneven brush pressure Broken or loose belt (cylindrical brush model)

SOLUTION See SERVICE INDICATOR CODES
See SERVICE INDICATOR CODES
Turn button to reset See SERVICE INDICATOR CODES Recharge batteries Tighten loose cables Replace battery(s) Contact service Contact service Reset circuit breaker Contact service Check plug connection Replace batteries See SERVICE INDICATOR CODES Replace charger Replace power supply cord See SERVICE INDICATOR CODES Reset circuit breaker Contact service Contact service See SERVICE INDICATOR CODES Contact service Reset circuit breaker Contact service Contact service
Lower squeegee assembly to floor See SERVICE INDICATOR CODES
Contact service Reset circuit breaker Remove debris Replace brush/pad Adjust brush pressure Use correct brush/pad for application Recharge batteries Scrub head/brushes not level. Contact service Contact service

Nobles Speed Scrub 500 (01-2017)

39

MAINTENANCE

TROUBLESHOOTING – Continued

PROBLEM

CAUSE

Trailing water – poor or no water pickup

Full recovery tank or excessive foam buildup

Loose drain hose cap

Worn squeegee blades

Clogged drip trap (Squeegee assembly)

Clogged squeegee assembly

Loose vacuum hose connection

Clogged vacuum hose

Damaged vacuum hose

Clogged float shut-off screen in recovery tank

Recovery tank lid not completely closed

Defective seals on recovery tank lid

Little or no solution flow Empty solution tank

Low solution flow rate set

Clogged solution tank filter

Plugged solution supply line

Automatic battery watering tank does not dispense water

Tank is empty Defective pump Faulty control board

Short run time

Low battery charge

Batteries need maintenance

Defective battery or end of battery life

Battery discharge indicator (BDI) programmed incorrectly

Faulty charger

Brush pressure set too high

Excessive scrub head noise (Orbital model)

Damaged scrub head isolators

SOLUTION Drain recovery tank
Replace cap on drain hose Rotate or replace squeegee blades Remove cover and clean
Clean squeegee assembly Secure vacuum hose connection Flush vacuum hose Replace vacuum hose Clean screen
Check lid for obstructions
Replaced seal Refill solution tank Increase solution flow rate Clean filter Flush solution supply line Refill tank Contact service Contact service Charge batteries See BATTERIES Replace batteries See CHARGING BATTERIES
Replace battery charger Lower brush pressure Replace isolators. Contact service

40

Nobles Speed Scrub 500 (09-2020)

SPECIFICATIONS

GENERAL MACHINE DIMENSIONS/CAPACITIES/PERFORMANCE

MODEL

26 in / 650 mm Dual Disk

28 in / 700 mm Dual Disk

32 in / 800 mm Dual Disk

Length

58.5 in / 1486 mm

59.1 in / 1501 mm

61.1 in / 1552 mm

Width

27.5 in / 700 mm

29.5 in / 750 mm

33.5 in / 850 mm

Height

43.3 in / 1100 mm

43.3 in / 1100 mm

43.3 in / 1100 mm

Weight

320 Ib / 145 kg

330 Ib / 150 kg

355 Ib / 161 kg

Weight (with batteries)

610 Ib / 277 kg

620 Ib / 281 kg

645 Ib / 293 kg

GVW

800 Ib / 363 kg

810 Ib / 367 kg

835 Ib / 379 kg

Squeegee width

38.3 in / 973 mm

41.3 in / 1049 mm

46.6 in / 1234 mm

Solution tank capacity

22.5 gal / 85 L

Recovery tank capacity

27 gal / 102 L

Automatic battery watering tank capacity

0.61 gal / 2.3 L

Scrubbing path width

26 in / 650 mm

28 in / 700 mm

32 in / 800 mm

Down pressure

Low: 65 lbs / 29.5 kg, High: 120 lbs / 54.5 kg

Low: 70 lbs / 32 kg, High: 120 lbs / 54.5 kg

Low: -75 lbs / 34 kg, High: 120 lbs / 54.5 kg

Scrubbing speed

2.5 mph / 4.0 km/h (220 fpm / 67 mpm)

Transport speed

2.7 mph / 4.4 km/h (240 fpm / 73 mpm)

Reverse speed Productivity rate – estimated actual ec-H2O productivity rate – est. actual

11.6 mph / 2.6 km/h (144 fpm / 44 mpm)

20,571 ft2/hr / 1911 m2/hr

22,286 ft2/hr / 2070 m2/hr

25,714 ft2/hr / 2389 m2/hr

23,124 ft2/hr / 2148 m2/hr

23,680 ft2/hr / 2200 m2/hr

27,323 ft2/hr / 2538 m2/hr

Aisle turnaround width

59 in / 1499 mm

59.6 in / 1514 mm

61.6 in / 1565 mm

Maximum operating gradient

2%

Solution flow rate

Low: .30 gpm / 1.1 L/min, Med: .40 gpm / 1.5 L/min, High: .50 gpm / 1.9 L/min

ec-H2O solution flow rate

Low: .15 gpm / 0.57 L/min, Med: .22 gpm / 0.84 L/min, High: .30 gpm / 1.14 L/min

Low: .22 gpm / 0.84 L/min, Med: .33 gpm / 1.25 L/min, High: .44 gpm / 1.67 L/min

Low: .22 gpm / 0.84 L/min, Med: .33 gpm / 1.25 L/min, High: .44 gpm / 1.67 L/min

Brush motor

2-24 VDC, 0.75 hp/0.55 kW, 29 A, 220 rpm

Propel motor

24 VDC, 0.63 hp / 0.48 kW, 20A

Vacuum motor

24 VDC, 0.46 hp / .34 kW, 14.3 A

Water lift

34 in / 864 mm

ec-H2O solution pump

24 VDC, 2 A, 1.0 gpm / 3.8 L/min, min open flow

Automatic battery watering pump

12 VDC, 4 A, 0.8 gpm / 3.0 L/min, min open flow

Machine voltage

24 VDC

Battery capacity

4-6V 225AH C/20 Wet, 4-6V 260AH C/20 Wet, 4-6V 220AH C/20 AGM, 2-12V 183AH C/20 TPPL

Total power consumption

66 A nominal / 1.6 kW

Battery Charger – on-board

115-240VAC, 50/60Hz, 24VDC, 25A

Battery Charger – smart off-board

85-265VAC, 50/60Hz, 24VDC, 25A

Protection grade

IPX3

Sound pressure level LpA Sound uncertainty KpA Sound power level uncertainty LpA uncertainty KpA Machine vibration at hand-arm Ambient operating temperature

67.4 dB(A) 0.8 dB(A)
83.1 dB(A)

67.4 dB(A) 0.8 dB(A)
83.1 dB(A) <2.5 m/s2 Min: 36F/2C, Max: 110F/43C

67.4 dB(A) 0.8 dB(A)
83.1 dB(A)

*Values per IEC 60335-2-72. Specifications are subject to change without notice.

Nobles Speed Scrub 500 (09-2020)

41

SPECIFICATIONS

GENERAL MACHINE DIMENSIONS/CAPACITIES/PERFORMANCE – Continued

MODEL

28 in / 700 mm Cylindrical Brush

28 in / 700 mm Orbital

Length

59.1 in / 1501 mm

58.5 in / 1486 mm

Width

30.7 in / 780 mm

28 in / 710 mm

Height

43.3 in / 1100 mm

43.3 in / 1100 mm

Weight

370 Ib / 168 kg

370 Ib / 168 kg

Weight (with batteries)

660 Ib / 299 kg

660 Ib / 299 kg

GVW

850 Ib / 386 kg

850 Ib / 386 kg

Squeegee width

46.6 in / 1234 mm

41.3 in / 1049 mm

Solution tank capacity

22.5 gal / 85 L

Recovery tank capacity

27 gal / 102 L

Automatic battery watering tank capacity

0.61 gal / 2.3 L

Scrubbing path width

28 in / 700 mm

Down pressure

Low: 85 lbs / 38.5 kg High: 120 lbs / 54.5 kg

Low: 110 lbs / 50 kg High: 170 lbs / 77 kg

Scrubbing speed

2.5 mph / 4.0 km/h (220 fpm / 67 mpm)

Transport speed

2.7 mph / 4.4 km/h (240 fpm / 73 mpm)

Reverse speed Productivity rate – estimated actual ec-H2O productivity rate – est. actual

1.6 mph / 2.6 km/h (144 fpm / 44 mpm)

22,286 ft2/hr / 2070 m2/hr

20,260 ft2/hr / 1882 m2/hr

23,680 ft2/hr / 2200 m2/hr

21,527 ft2/hr / 2000 m2/hr

Aisle turnaround width

59.6 in / 1514 mm

59 in / 1499 mm

Maximum operating gradient

2%

Solution flow rate

Low: .30 gpm / 1.1 L/min, Med: .40 gpm / 1.5 L/min, High: .50 gpm / 1.9 L/min

ec-H2O solution flow rate

Low: .22 gpm / 0.84 L/min, Med: .33 gpm / 1.25 L/min, High: .44 gpm / 1.67 L/min

Brush motor

2-24 VDC, 0.63 hp/0.47 kW, 23 A, 1500 rpm

24 VDC, 0.75 hp/0.55 kW, 28 A, 2200 rpm

Propel motor

24 VDC, 0.63 hp / 0.48 kW, 20A

Vacuum motor

24 VDC, 0.46hp / .34 kW, 14.3 A

Water lift

34 in / 864 mm

ec-H2O solution pump

24 VDC, 2 A, 1.0 gpm / 3.8 L/min, min open flow

Automatic battery watering pump

12 VDC, 4 A, 0.8 gpm / 3.0 L/min, min open flow

Machine voltage

24 VDC

Battery capacity

4-6V 225AH C/20 Wet, 4-6V 260AH C/20 Wet, 4-6V 220AH C/20 AGM, 2-12V 183AH C/20 TPPL

Total power consumption

66 A nominal / 1.6 kW

Battery Charger – on-board

115-240VAC, 50/60Hz, 24VDC, 25A

Battery Charger – smart off-board

85-265VAC, 50/60Hz, 24VDC, 25A

Protection grade

IPX3

Sound pressure level LpA Sound uncertainty KpA Sound power level uncertainty LpA uncertainty KpA Machine vibration at hand-arm Ambient operating temperature

68.3 dB(A) 0.8 dB(A)
84.3 dB(A)

<2.5 m/s2 Min: 36F/2C, Max: 110F/43C

66.9 dB(A) 0.8 dB(A)
83.4 dB(A)

*Values per IEC 60335- 2- 72. Specifications are subject to change without notice.

42

Nobles Speed Scrub 500 (09-2020)

MACHINE DIMENSIONS
DUAL DISK MODEL
27.5 in / 700 mm 26 in / 650 mm Model
29.5 in / 750 mm 26 in / 700 mm Model
33.5 in / 800 mm 26 in / 800 mm Model

SPECIFICATIONS

43.3 in 1100 mm

58.5 in / 1486 mm 26 in / 650 mm Model
59.1 in / 1501 mm 28 in / 700 mm Model
61.1 in / 1552 mm 32 in / 800 mm Model

38.3 in / 937 mm 26 in / 650 mm Model
41.3 in / 1049 mm 28 in / 700 mm Model
46.6 in / 1234 mm 32 in / 800 mm Model

Nobles Speed Scrub 500 (01-2017)

43

SPECIFICATIONS
CYLINDRICAL BRUSH MODEL
30.7 in / 780 mm

59.1 in / 1501 mm

43.3 in 1100 mm
46.6 in / 1234 mm

44

Nobles Speed Scrub 500 (01-2017)

ORBITAL PAD MODEL
28 in / 710 mm

SPECIFICATIONS

58.5 in / 1486 mm

43.3 in 1100 mm
41.3 in / 1049 mm

Nobles Speed Scrub 500 (01-2017)

45

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>