Nobles Speed Scrub 300 Service Manual

This manual is available for 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:

• The machine is operated with reasonable care.
• The machine is maintained regularly - per the machine maintenance instructions provided.
• The machine is maintained with manufacturer supplied or equivalent parts.

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.

Tennant Company
PO Box 1452
Minneapolis, MN 55440
Phone: (800) 553-8033 or (763) 513-2850
www.tennantco.com

Pro-Membrane, Membrane, Severe Environment, Zone Settings, Quite-Mode are US registered and unregistered trademarks of Tennant Company.

Trojan and HydroLINK are registered trademarks of Trojan Battery Company.

This product may contain portions of software that have various 3rd party licenses. More information can be found at: www.tennantco.com/opensource

Specifications and parts are subject to change without notice.

Original Instructions. Copyright © 2015-2017 Tennant Company. All rights reserved.

Intended use

The automatic 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. Do not use this machine on carpeted surfaces. 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 location

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.

• Intended use (page 2)
• Machine data (page 2)
• Serial number location (page 2)
• Uncrating machine (page 2)

• Component locator (page 9)
• Electrical schematic symbols (page 10)
• Electrical schematic (drive model) - 1 of 2 (page 12)
• Electrical schematic (push model) - 1 of 2 (page 14)
• Fastener torque (page 17)
• SAE (standard) (page 17)
• Metric (page 17)
• General machine dimensions/capacities/performance (page 18)
• General machine dimensions/capacities/performance (continued) (page 19)

• Maintenance chart (page 24)
• Machine maintenance (page 25)
• After daily use (page 25)
• After weekly use (page 27)
• After every 50 hours of use (page 28)
• After every 100 hours of use (page 28)
• Electric motors (page 29)
• Belts (page 29)
• Orbital scrub head isolators (lower) (page 29)
• Batteries (page 30)
• Maintenance-free batteries (page 30)
• Flooded (wet) lead-acid batteries (page 30)
• Checking connections / cleaning (page 30)
• Charging batteries (page 31)
• Squeegee blade replacement (page 32)
• ec-H2O NanoClean water conditioning cartridge replacement (page 33)
• Loading/unloading machine for transporting (page 34)
• Storing machine (page 35)
• Freeze protection (page 35)

• Faults (page 36)
• Faults - off board battery charger (page 49)
• Troubleshooting (page 50)
• Onboard battery charging on (option) (page 52)

• Batteries failed to charge / reduced run time (onboard charger) (page 53)
• Off board battery charging on (option) (page 54)
• Batteries failed to charge / reduced run time (off board charger) (page 55)
• Power-up on (page 56)
• Machine failed to power up (page 57)
• Propel subsystem (option) (page 58)
• Failed to propel (page 59)
• Scrub motor on (page 60)
• Scrub motor failed to turn on (page 61)
• Vacuum fan on (page 62)
• Vacuum fan failed to turn on (page 63)
• Solution control on (conventional) (page 64)
• Solution control failed to turn on (conventional) (page 65)
• Solution control on (ec-H2O) (page 66)
• Solution control failed to turn on (ec-H2O) (page 67)
• Sun-I/O circuit board testing (universal schematic) (page 68)
• Sun-I/O circuit board testing procedure (page 69)
• CAN open network issues (page 70)
• Connectors fully seated (page 70)
• Pin fully seated (page 70)
• Network resistance (page 70)
• Node (module) resistance (page 71)
• Wire continuity to node (page 71)
• Machine node table (page 72)

• Service diagnostics tool (page 73)
• Programming a new interface module (page 73)
• Re-configuring existing modules (page 75)
• Programming the I-Drive module (option) (page 77)
• Displaying fault codes (page 78)
• Battery charger settings (page 79)
• Off-board battery charger (page 79)
• Changing off-board battery charger settings (page 79)
• On-board battery charger (page 81)
• Changing on-board battery charger settings (Pro-Membrane model) (page 81)
• Changing on-board battery charger settings (Pro-Panel model) (page 82)
• Battery charger operation (page 83)

The following warning precautions are used throughout this manual as indicated in their description:‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​​​‌‌​​​‌​‍‍​‍​⁠⁠‌‍‌⁠‌‍‍‍‍‍‌‍‍‌⁠‌​⁠‌‌

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.

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.

To keep the machine in good working condition, simply perform the following maintenance procedures.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​​‌‍‌​​​‌​‍‍​‌‌‍⁠⁠​‍​⁠​‌‌‌⁠‍‌‍‌‌‌‌‍​‍

After daily use

1. Drain and rinse out the recovery tank (Fig. 86). See DRAINING TANKS.

2. Remove the debris tray and empty (Fig. 87).

3. Remove and clean the float shut-off screen (Fig. 88).

4. Drain and rinse out the solution tank (Fig. 89).

5. Disk scrub head - Turn pad over or replace when worn (Fig. 90).

Orbital scrub head - Turn the work pad over or replace when worn (Fig. 91).‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​​‌‍‍​​​‌​‍‍​‌‍‌⁠‍‌‌​‍‌⁠⁠‍​‌⁠⁠⁠​‍⁠⁠‌‌

6. Click-Quick pad driver/brushes - clean any debris buildup from hub connection area (Fig. 92).

7. Wipe the squeegee blades clean. Inspect blades for wear and damage (Fig. 93). Rotate blade if worn. See SQUEEGEE BLADE REPLACEMENT.

8. Check the scrub head skirt for wear or damage (Fig. 94). Replace if worn or damaged.

9. Clean the outside surface of the machine with an all purpose cleaner and damp cloth (Fig. 95).

10. Cylindrical scrub head - Remove and clean debris trough (Fig. 96).

11. Charge batteries (Fig. 97). See BATTERIES.

After weekly use

1. Check the electrolyte level in all batteries (Fig. 98). See BATTERIES.

2. Remove the drip tray cover from the squeegee assembly and clean reservoir (Fig. 99).

1. Remove the solution tank filter and clean screen (Fig. 100). Turn the filter bowl counter-clockwise to remove. Make sure to drain solution tank before removing filter.

2. Cylindrical brushes - Rotate brushes from front to rear (Fig. 101). Replace brushes when they no longer clean effectively.

3. Cylindrical scrub head - Remove debris buildup from underside of scrub head (Fig. 102).

4. Inspect and clean the seal on the recovery tank lid (Figure 104). Replace seal if damaged.

After every 100 hours of use

If machine is equipped with the optional battery watering system, check the watering hoses and connections for damage and wear (Figure 105). Replace system if damaged.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​​‌⁠​​​​‌​‍‍​⁠⁠‍‌⁠‍⁠‍‍​‌⁠​‍‍‍​‌‍⁠⁠​‌⁠

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

Belts

Replace belts every 1250 hours. Contact trained personnel for belt replacement (Fig. 105).

Cylindrical Brush Drive Belt

Orbital scrub head isolators (lower)

Replace the four lower vibration isolators every 500 hours. The lower isolators (hidden) are located between the deck plate the driver plate. See REPLACING ORBITAL HEAD, LOWER ISOLATORS in the SERVICE section of this manual (page 88).

The lifetime of the batteries depends on their proper maintenance. To get the most life from the batteries;‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​​‌⁠‍​​​‌​‍‍​‌‌‌​‌‌⁠​⁠​‍​‍⁠​‍‍⁠‌⁠‌‌⁠‌

• Do not charge the batteries more than once a day and only after running the machine for a minimum of 15 minutes.
• Do not leave the batteries partially discharged for long period of time.
• Only charge the batteries in a well-ventilated area to prevent gas build up. Charge batteries in areas with ambient temperatures 80°F (27°C) or less.
• Allow the charger to complete charging the batteries before re-using the machine.
• 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 batteries supplied by Tennant.

Maintenance-free batteries

Maintenance-free (Sealed AGM) 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.

The electrolyte level should be slightly above the battery plates as shown before charging (Fig. 107). 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 0.12 in (3 mm) below the sight tubes.

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

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 (Fig. 108). Do not remove battery caps when cleaning 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.

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) lead-acid batteries check the battery electrolyte level weekly before charging. See FLOODED (WET) LEAD-ACID BATTERIES.

4. For models equipped with on-board chargers, remove the charger's power cord from the storage hooks and plug power cord into a properly grounded wall outlet (Fig. 109).

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 (Fig. 110). Refer to the off-board battery charger's owner manual for operating instructions.

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. The text continues on page 32.

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 (Fig. 111).‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​​‍​​​​​‌​‍‍​⁠​‌​⁠‍⁠⁠​​‍‍‌⁠‌‌‍⁠‍‍‌‌‍​

6. After charging batteries unplug the power supply cord and wrap cord around the cord hooks (Fig. 112). For models equipped with an off-board charger, Always disconnect the AC power supply cord first before disconnecting charger from machine.

Squeegee blade replacement

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 (Fig. 113). To loosen the knobs quickly, squeeze the blade retainer and squeegee frame together.

3. Remove worn blade(s) from the blade retainer (Fig. 114)

4. Rotate the rear blade to a new wiping edge (Fig. 115). Make sure to align the slots in the blade with retainer tabs.

5. Squeeze the squeegee frame and blade retainer together and re-tighten the two outside knobs (Fig. 116).

ec-H2O NanoClean water conditioning cartridge replacement

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.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​​‍​‌​​​‌​‍‍​​‌‌‍​​⁠​​⁠‌‌‍‍‌‌‍​‍​​⁠​‍

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.

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 (Fig. 117). Drain recovery tank before lifting tank.

3. Disconnect the two hose connectors from the top of the cartridge by pressing the gray collars inward and pulling the connectors outward (Fig. 118). Lift cartridge to remove.

4. Fill in the installation date on the new cartridge label (Fig. 119).

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 129).

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 (Fig. 120). The three indicator lights will then blink three times to indicate timer has been reset. Repeat process if the three

Loading/unloading machine for transporting

When transporting the machine by use of trailer or truck, carefully follow the loading and tie-down procedure:

1. Raise the scrub head and remove squeegee assembly.
2. Use a ramp that can support the machine weight and operator and carefully load machine. Do not operate the machine on a ramp incline that exceeds a 21% grade level (Fig. 121). A winch must be used when ramp incline exceeds a 21% grade level.

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 (Figure 131).
4. Place a block behind each wheel (Figure 131).
5. Using tie-down straps, secure the machine using the four tie-down brackets located on the machine frame (Figure 131). It may be necessary to install tie-down brackets to the floor of your trailer or truck.

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 every 3 months.
2. Drain and rinse recovery tank and solution tank.
3. Store the machine in a dry area with squeegee and scrub head in the up position.

4. Open the recovery tank lid to promote air circulation.

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.
3. Pour 1 gallon (4 liters) of propylene glycol based recreational vehicle (RV) antifreeze into the solution tank.

Models equipped with optional Severe Environment detergent tank - Lift out the tank and empty the detergent from tank. Pour a 1/4 gallon (1 liter) of propylene glycol based recreational vehicle (RV) antifreeze into the detergent tank.

4. Turn machine on and operate the solution flow system. Turn the machine off when the antifreeze is visible on floor.

Models equipped with ec-H2O option - Operate ec-H2O scrubbing to cycle antifreeze through system.

Models equipped with Severe Environment mode option - Press the Severe Environment button to cycle antifreeze through system.

5. After storing machine in freezing temperatures, drain any remaining antifreeze from the solution tank and from the optional Severe Environment detergent tank. Add clean water to solution tank and to optional detergent tank and operate the machine to flush system.

CAN open network issues

The following items include procedures to help investigate a fault related to a CAN open network on the machine.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌​‌‍​​​‌​‍‍​​​‌​‍‌⁠​⁠​⁠‌⁠‌⁠‍‍​⁠‍‍​​‌

Connectors fully seated

Each node on the network has a connector for the CAN communication wires. A loose connection could cause a fault code error. Check each board individually to make sure the connectors are fully seated. There may also be other connectors within the harness that should be checked. If the connector is not fully seated, push in and power cycle the machine to see if the fault clears.

Pin fully seated

A pin within the harness side of the connector may not be fully seated or may come loose over time causing a fault. If the pin is not fully seated, push it back in and power cycle the machine to see if the fault clears.

Network resistance

The network resistance must be correct for the network to operate correctly. Depending on which node the measurement is taken at and the method of measurement, the resistance may be one of two values: 121 or 61 Ohms. Any value other than these two means something is wrong with the network.

Method 1

6. Turn off machine power.
7. Locate a CAN node location on the machine.
8. Disconnect the connector containing the CAN wires.
9. Measure the resistance between the green and yellow wires.
10. Depending which nodes are still connected, resistance should be 61 or 121 ohm.

Method 2

1. Turn off machine power.
2. Locate a CAN node location on the machine.
3. Carefully push probes into back of connector containing the CAN wires.
4. Since network remains connected in this mode, resistance should measure approximately 61 ohms.

Service diagnostics tool

Machine software configuration, which is stored in the interface module, must be programmed if the i-Drive or interface modules are replaced in the field or if optional features are installed in the field.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌​‍‌​​​‌​‍‍​​‌⁠‌‌‌​⁠​‍⁠​​‍‍​‍‌‍⁠‌‍‍‍

Authorized service providers can download the Service Diagnostics software from the My Tennant portal by visiting www.tennantco.com. Factory-Direct Tennant Service has this software installed on their ServiceLink devices.

A USB cable connects from the notebook to an external port on the control console. The SERVICE DIAGNOSTICS TOOL configures up to five control modules depending on optional trim packages. The interface module stores configuration data and communicates via RS232 serial communication with the i-Drive and through a CAN-Bus to all other modules.

• Interface Module: The interface module is located in the operator’s console.
• Machine Control Module: The machine control module is located at the rear of the battery compartment beneath a cover.
• I-Drive Propel Module (option): The I-Drive propel module is located above the rear squeegee assembly at the rear of the scrubber.
• Onboard Battery Charger Module (option): The onboard battery charger is located at the rear of the unit, beneath the plastic cover.
• ec-H2O NanoClean Module (option): The ec-H2O module is located in the front of the unit, beneath the recovery tank.

Programming a new interface module

SYSTEM REQUIREMENTS: Windows® 7 OS, Microsoft .NET 4.5 or later, USB to Mini-USB cable.

5. Connect a USB cable from a notebook computer to the machine and turn the key switch On.

6. Launch the software by double clicking the Service Diagnostics desktop shortcut or find the software in All Programs.

NOTE: Windows® may prompt a restart after installing the machine driver. Decline the restart, close Service Diagnostics and relaunch Service Diagnostics.

Re-configuring existing modules

SYSTEM REQUIREMENTS: Windows® 7 OS, Microsoft .NET 4.5 or later, USB to Mini-USB cable.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌​‍⁠​​​‌​‍‍​​​‌⁠⁠‌‍‍⁠⁠‌‍‌​‍‍‍‍‍‌​⁠‍‌

Machine software configuration, which is stored in the interface module, must be programmed if the i-Drive or interface modules are replaced in the field or if optional features are installed in the field.

Authorized service providers can download the Service Diagnostics software from the My Tennant portal by visiting www.tennantco.com. Factory-Direct Tennant Service has this software installed on their ServiceLink devices.

A USB cable connects from the notebook to an external port on the control console. The SERVICE DIAGNOSTICS TOOL configures up to five control modules depending on optional trim packages. The interface module stores configuration data and communicates via RS232 serial communication with the i-Drive and through a CAN-Bus to all other modules.

1. Connect a USB cable from a notebook computer to the machine and turn the key switch On.

2. Launch the software by double clicking the Service Diagnostics desktop shortcut or find the software in All Programs.

NOTE: Windows® may prompt a restart after installing the machine driver. Decline the restart, close Service Diagnostics and relaunch Service Diagnostics.

3. Check for machine software updates. A yellow highlight surrounding the Firmware button indicates that updates are available. Click on the Firmware button to install updates.

Programming the i-Drive module (option)

SYSTEM REQUIREMENTS: Windows® 7 OS, Microsoft .NET 4.5 or later, USB to Mini-USB cable.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌​⁠‌​​​‌​‍‍​​‍‌‌‌⁠‌​‍‌⁠⁠‌​​‍​‌⁠​​‍‌‌

Machine software configuration, which is stored in the interface module, must be programmed if the i-Drive or interface modules are replaced in the field or if optional features are installed in the field.

Authorized service providers can download the Service Diagnostics software from the My Tennant portal by visiting www.tennantco.com. Factory-Direct Tennant Service has this software installed on their ServiceLink devices.

A USB cable connects from the notebook to an external port on the control console. The SERVICE DIAGNOSTICS TOOL configures up to five control modules depending on optional trim packages. The interface module stores configuration data and communicates via RS232 serial communication with the i-Drive and through a CAN-Bus to all other modules.

1. Connect a USB cable from a notebook computer to the machine and turn the key switch On.

2. Launch the software by double clicking the Service Diagnostics desktop shortcut or find the software in All Programs.

NOTE: Windows® may prompt a restart after installing the machine driver. Decline the restart, close Service Diagnostics and relaunch Service Diagnostics.

3. Check for machine software updates. A yellow highlight surrounding the Firmware button indicates that updates are available. Click on the Firmware button to install updates.

4. Click on the I-Drive button.

5. Click on the Program Factory Defaults button to program the I-Drive module.

6. Cycle the key switch to save.

Displaying fault codes

SYSTEM REQUIREMENTS: Windows® 7 OS, Microsoft .NET 4.5 or later, USB to Mini-USB cable.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌​⁠‍​​​‌​‍‍​​⁠‌​‍‍‌⁠‌‌‍‍​⁠⁠​​​​‍‍‌⁠⁠

Authorized service providers can download the Service Diagnostics software from the My Tennant portal by visiting www.tennantco.com. Factory-Direct Tennant Service has this software installed on their ServiceLink devices.

A USB cable connects from the notebook to an external port on the control console. The SERVICE DIAGNOSTICS TOOL configures up to five control modules depending on optional trim packages. The interface module stores configuration data and communicates via RS232 serial communication with the i-Drive and through a CAN-Bus to all other modules.

1. Connect a USB cable from a notebook computer to the machine and turn the key switch On.

2. Launch the software by double clicking the Service Diagnostics desktop shortcut or find the software in All Programs.

NOTE: Windows® may prompt a restart after installing the machine driver. Decline the restart, close Service Diagnostics and relaunch Service Diagnostics.

3. Active faults scroll across the top of the home screen.

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 machines shipped without batteries and supplied with 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 machine’s battery discharge indicator must be reprogrammed to match charger settings (See OFF-BOARD BATTERY CHARGER below).

Off-board battery charger

To change the off-board battery charger settings, See CHANGING OFF-BOARD BATTERY CHARGER SETTINGS.

To reprogram the machine’s battery discharge indicator (BDI), service application software is required,

Changing off-board battery charger settings

1. Disconnect charger from the machine and plug charger into power supply.

The middle LED will blink upon startup and the screen display “No Battery”.

2. Press and hold the two outside arrows for 12 seconds or until the middle LED turns solid yellow.

3. Press the middle button to activate the battery type options (algorithms). The left LED will turn red.

4. Press the up arrow button to scroll through the battery types (algorithms) until the desired battery type is located.

5. Press the middle button to select the battery type. The red LED light will turn off.

6. Press the up arrow button until the “PROGRAMMING SAVE AND EXIT” screen is displayed.

7. Press the middle button to save the new settings. The screen will display “PROGRAMMING PARAMETERS SAVED”.

On-board battery charger

Pro/Membrane Models - Service application software required, contact service. As an alternative, the charger profile may be manually changed. See CHANGING ON-BOARD BATTERY CHARGER SETTINGS for Pro-Membrane model. The battery discharge indicator will automatically reprogram to match battery type when the battery charger profile is changed.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌‌​‌​​​‌​‍‍​‍‌⁠​‌⁠​⁠⁠​⁠⁠‌⁠‌‍​‌‌‌‌‍‌‌

Pro-Panel Model - See CHANGING ON-BOARD BATTERY CHARGER SETTINGS for Pro-Panel model. The battery discharge indicator will automatically reprogram to match battery selection.

Changing on-board battery charger settings (Pro-Membrane model)

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 battery cables (Fig. 114).

2. Unwrap the battery charger power cord from the cord hooks.
3. Using a T25 star screwdriver, remove the two screws located at the bottom of the control console to access battery charger (Fig. 115).

4. Disconnect the battery cable, power cord and wire harness from charger. Using a T25 star screwdriver, remove the four screws that mount charger to machine (Fig. 116). Remove charger from machine.

5. Remove the black cap from bottom side of charger to access the profile dial (Fig. 117).

6. Using a small standard screwdriver, turn the dial to the appropriate battery type according to the following chart (Fig. 118).

*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.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌‌​‍​​​‌​‍‍​​⁠‍‌⁠​⁠‌⁠⁠‌‌⁠⁠‌‌​‌‍​​​‌‌

7. Replace the black cap on charger, reinstall battery charger and replace control console.
8. Reconnect the battery cable connection.
9. 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.

Changing on-board battery charger settings (Pro-Panel model)

NOTE: To perform this procedure, machine must be in supervisor mode. See SUPERVISOR CONTROLS instructions at back of manual.

To change the on-board battery charger settings for a different battery type:

1. Turn the key to the on position.
2. Press the settings button located on the home screen (Fig. 119).

3. Press the Setup button to access the Setup screen (Fig. 120).

4. Press the Battery Type button to select the battery type installed in machine (Fig. 121).

Battery charger operation

Above is a graph representing the I-U-I (constant current-constant voltage-constant current) charging strategy used to charge batteries. For flooded (wet) lead-acid batteries, the finish voltage can rise up to approximately 34 Volts (24 Volt System). The finish phase of the charge cycle causes out gassing bubbles to mix up the electrolyte and prevent sulphation build-up in the battery.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌‌​⁠​​​‌​‍‍​‍‌⁠​⁠⁠‍⁠⁠‌⁠⁠‌​‌⁠⁠⁠‍​‍‍‌‍

NOTE: Flooded (wet) lead-acid batteries outgas during a normal charging cycle. Always charge batteries in a well-ventilated area.

The length of charge time for each phase and overall charge time varies based on the size of the battery, size of the charger, and other conditions of the battery such as discharge level, age of battery, temperature, etc.

Equalization Charge Cycle - The equalization charge cycle automatically occurs once every 30 complete charge cycles on (wet) lead-acid batteries only. Charge current increases to higher levels during the equalization charge to mix layers of electrolyte that form as a result of repeated charging/discharging cycles. Maintenance-free batteries can become damaged from an equalization charge, which is why it is important to make sure the Tennant-specified charger is programmed for the battery option used (see BATTERY CHARGER SETTINGS ON BOARD/OFF BOARD in the SERVICE section of this manual). Maintenance-free batteries, such as AGM and Gel, use slightly lower finish voltages (approximately 31 Volts) to keep the batteries from outgassing. Water can not be added to maintenance-free batteries, so these batteries must be replaced if they are repeatedly over charged or the cells are dry due to an incompatible charger or charger setting.

Removing scrub head assembly

1. Drain recovery tank, turn off key, and disconnect batteries.
2. Remove debris tray (cylindrical only).

3. Remove scrub brushes and set aside.

4. Lower scrub head to floor.

5. Remove front shroud mounting hardware (2).

6. Pull forward to remove shroud. Set shroud aside.

7. Disconnect motor from wire harness connection.

8. Remove lift mechanism mounting bolts (2).

Note the orientation of the spacers and nylon washers for reassembly. Also, note the hole selection for the configured scrub head type.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌‌‌‌​​​‌​‍‍​⁠‌⁠‌‍​⁠​⁠​‌⁠‌‌‍​‍‌​⁠‌​‌⁠

9. Remove scrub head assembly.

Installing scrub head assembly

1. Installation is the reverse of removal.
2. Cylindrical Head Option Only: There are required brush pattern adjustments on the cylindrical scrub head (See CHECKING AND ADJUSTING CYLINDRICAL SCRUB BRUSH PATTERN in the SERVICE section of this manual).

Checking and adjusting cylindrical scrub brush pattern

NOTE: This procedure must be completed using a new set of brushes. Following this procedure using worn brushes may result in uneven brush wear and shortened brush life.

1. Apply chalk to a flat, level surface.

2. Disconnect the transaxle motor electrical connection.

NOTE: This must be done to keep the machine stationary during the brush pattern test.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌‌‌‍​​​‌​‍‍​‍​⁠‌⁠‍‌​‌‍‌‌‍​‌​‍‍‍​‌⁠​​

3. Turn off ec-H2O (if equipped) and disconnect the conventional water valve from the wire harness.

NOTE: This must be done in order to keep water from washing away the chalk that has been applied to the floor. Purge any residual water, at another location, by running the brushes for 30 seconds before proceeding to Step 4.

4. Move the scrubber so that the brushes are positioned over the chalk.

5. Set parking brake.
6. Lower the scrub head to the floor and activate scrub brushes for 20 seconds and then release the handle.

7. Release parking brake (if equipped) and pull the machine away from the pattern test site and inspect the brush pattern. The pattern shown below has a severe taper and requires adjustment to achieve two parallel rectangles.

8. To adjust the brush pattern taper, lower the scrub head to the floor.

9. Loosen (do not remove) the RH side linkage bolt.

10. Turn the adjustment screw counter-clockwise to increase down pressure on the RH side or clockwise to decrease down pressure on the RH side of the scrub brushes.

11. Re-apply chalk and repeat steps 4-10 until the desired brush pattern is achieved and then retighten the linkage bolt with the HEAD IN THE LOWERED POSITION.

12. The taper adjustment is complete. If the pattern is uneven front-to-rear, the brush pattern can be further adjusted using the slotted top bolt. Loosen the top bolt just enough so the scrub head bracket moves freely and the scrub head settles in its natural position on the level floor.

13. Tighten the top bolt and perform a final pattern check. Adjustment is complete.

Removing lower orbital head isolators

1. Remove scrub head assembly. See REMOVING SCRUB HEAD ASSEMBLY in the SERVICE section of this manual.
2. Place the scrub head on a work bench and loosen the nyloc nuts for the (4) lower isolators.

3. Flip the head upside down and remove the pads.

4. Remove flat head screws securing the lower plate to the lower isolators.

5. Loosen the 0.16 in (4 mm) set screw securing the concentric motor weight to the motor shaft.

6. Remove the lower plate and the lower isolators (4).

Installing lower orbital head isolator

1. Installation is the reverse of removal.
2. During reassembly, place a 30 lb weight on the top of the motor while tightening the motor shaft set screw. This weight simulates the actual down force on the scrub head and sets the shaft pre-load. Torque the set screw to 15 ft-lbs (20 Nm).

Removing transaxle assembly (option)

1. Drain solution and recovery tanks.

2. Disconnect batteries.

3. Remove batteries and set aside.

4. Remove rear squeegee assembly and set aside.

5. Carefully lower machine onto the left side using a protective blanket.

6. Remove wheel nuts (2). It will be necessary to raise the machine up and lower it to the right side to access the left side wheel.

7. Remove transaxle mounting hardware

Installing transaxle assembly (option)

1. Installation is the reverse of removal.

PTC (push-to-connect) fittings

Making a connection

1. Cut the tube square. The outer diameter of the tubing must be free from score marks, burrs or sharp edges.

2. Insert tube. The fitting will grip the hose before it seals. Be sure the tube is completely inserted into the fitting.

3. Push into the tube stop. The collet has stainless steel teeth which hold the tube firmly in position while the o-ring provides a permanent leak-proof seal.

4. Pull on the fitting to check that the connection is secure. Test the system for leaks prior to leaving the site. (Fig. 4)

Disconnecting

1. Push in collet squarely against face of fitting to release the hose from the fitting. With the collet held in this position, the tube can be removed. The fitting can be re-used.

Removing vacuum fan

1. Key Off and disconnect batteries.

2. Remove rear squeegee hose from recovery tank.

3. Cut zip tie and disconnect vacuum fan from wire harness.

4. Remove vacuum fan mounting hardware (3).

5. Remove vacuum fan assembly.

Installing vacuum motor

1. Installation is the reverse of removal.

Removing carbon brushes

1. Remove torx screws (2) securing vacuum fan cover assembly.

2. Loosen carbon brush mounting torx screws (4).

3. Lift up to release and remove carbon brushes (2).

Installing carbon brushes

1. Inspect carbon brushes. Replace carbon brushes if they are stuck or are less than 0.375 in (10 mm).

2. Clean the commutator using a stone and then use compressed air to clean any dust from inside the motor.

Removing water solenoid

1. Drain solution and recovery tanks.

2. Disconnect batteries.

3. Remove batteries and set aside.

4. Remove rear squeegee assembly and set aside.

5. Carefully lower machine onto the left side using a protective blanket.

6. Proceed to the next step for standard models. Loosen knob set screws and remove knob. Set knob aside.

7. Disconnect electrical connections and remove T-25 Torx mounting screws (2). Set hardware aside.

8. Disconnect PTC (Push-To-Connect) connections (2) from solenoid. See PTC (PUSH-TO-CONNECT) FITTINGS in the SERVICE section of this manual.

Installing water solenoid

1. Installation is the reverse of removal.

Adjusting water solenoid

1. Loosen set screws (2) and remove knob from water solenoid. Set knob aside.

2. Disconnect scrub head side PTC (Push-To-Connect) fitting from water solenoid. See PTC (PUSH-TO-CONNECT) FITTINGS in the SERVICE section of this manual.

3. Disconnect transaxle motor (option) electrical connector.

NOTE: This is necessary to prevent movement while dispensing water during the adjustment process.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌‍​‌​​​‌​‍‍​⁠​​​⁠​⁠‌⁠‌​‍​‌‌‍⁠‍⁠​​‍⁠⁠

4. Add water to the solution tank.

5. Place a shallow catch basin below the water solenoid, turn on floor scrubber and activate conventional solution flow by squeezing the handle assembly.

NOTE: Attaching a zip tie will assist in holding the handle while making adjustments to the water solenoid.‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌‍​‍​​​‌​‍‍​‌‌​⁠⁠⁠​‌‍‍⁠‍‍​⁠‌​⁠​​​⁠‌‍

6. Turn the solenoid valve stem completely counter clockwise for maximum water flow.

7. Slowly turn the valve stem clockwise until water flow stops. Stop immediately when water flow stops. This is the no-flow or clockwise knob setting.

8. Reinstall the adjustment knob against the stop pin as shown below. Tighten set screws (2).

NOTE: Tighten one set screw and then rotate the knob to gain access to the other set screw.

9. Reconnect PTC (Push-To-Connect) fitting to water solenoid valve, cut zip tie securing bail handle, and reconnect transaxle motor connection. Adjustment is complete.

Control modules

Removing machine control module (option)

1. Drain solution and recovery tanks.

2. Disconnect batteries.

3. Remove batteries and set aside.

4. Cut zip ties securing hoses and wire harnesses to cover.

5. Remove the heat sink mounting bolts (2).

6. Carefully lower the heat sink and machine control module assembly and then disconnect all electrical connections.

7. Remove the heat sink and machine control module assembly from the scrubber.

Installing control module

1. Attach a static wrist strap to the battery (-) terminal to prevent ESD damage to the logic board.

2. Installation is reverse of removal.

NOTE: The torque specification for control module electrical cables is 52 in-lbs (6 Nm).‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌‍‌​​​​‌​‍‍​​‍​‌‌‍⁠‌⁠⁠‍‍‍⁠⁠‍⁠‌‍​‌‌⁠⁠

Removing i-Drive module (option)

1. Key Off and batteries disconnected.
2. Remove T-25 torx mounting screws (2).

3. Carefully lower access cover.

4. Remove four (4) hex screws to remove the control console plate.

5. Disconnect electrical connections and remove I-Drive mounting screws (2).

Installing i-Drive module (option)

1. Installation is reverse of removal.
2. The new I-Drive module must be programmed to operate in the scrubber. See SERVICE DIAGNOSTICS TOOL in the SERVICE section of this manual.

Removing onboard battery charger (option)

1. Key Off and batteries disconnected.
2. Remove T-25 torx mounting screws (2).

3. Carefully lower access cover.

4. Disconnect charger electrical connections.

5. Remove battery charger mounting torx hardware (4).

6. Remove battery charger.

Installing onboard battery charger

1. Installation is reverse of removal.

NOTE: This battery charger can be programmed for multiple battery configurations. This configuration data is stored in the interface module and will automatically configure a replacement battery charger once installed and following a power-up cycle. Reprogramming is required if the interface module has been replaced, or if a different type of battery is used in the equipment (i.e. other than factory-installed equipment). (See SERVICE DIAGNOSTICS TOOL in the SERVICE section of this manual)‌‌​⁠‌‍‌‍⁠​‌⁠‍​‍‍⁠‍‍‌​​​​‌‍‌‍​​​‌​‍‍​‍‌‍​‍‍⁠​‍⁠⁠‌‍⁠‌​⁠⁠‌‍‌‍‍‍

Models equipped with the PRO-Panel LCD Touch Panel can be configured through the touch panel. All other models must be configured using separate configuration software via a mini-USB programming port on the back of the operator’s console. (See SERVICE DIAGNOSTICS TOOL in the SERVICE section of this manual.)

Removing interface module

1. Key Off and batteries disconnected.
2. Attach a static wrist strap to the battery (-) terminal to prevent ESD damage to the logic board.

3. Remove T-25 torx mounting screws (2).

4. Carefully lower access cover.

5. Remove T-25 torx mounting screws (2).

6. Lift up on the bottom of the panel and slide downward to remove.

7. Disconnect electrical connections and remove interface module.

Installing interface module

1. Installation is reverse of removal.
2. The new interface module must be programmed to operate in the Scrubber. See SERVICE DIAGNOSTICS TOOL in the SERVICE section of this manual.

Removing bail switch, speed potentiometer, or directional switch

1. Key Off and batteries disconnected.
2. Remove rear access cover mounting screws (2).

3. Carefully lower access cover.

4. Remove T-25 torx mounting screws (2).

5. Carefully separate the touch panel from the console and disconnect all electrical connections. Set instrument panel aside.

6. Remove T-25 torx mounting screw (1).

7. Remove cover and set aside.

8. Remove operator console mounting bolts (2).

9. Lift up and forward to remove the operator console and place console on a work bench.

10. Remove plastic knobs and set aside. If replacing the potentiometer or directional switch, use a socket to remove the nut securing the potentiometer or the directional switch.

11. Remove bail screws (2) and set bail aside.

12. Remove screws (4) from front of operator’s console.

13. Remove screws (9) from rear of operator’s console and separate console assembly.

14. Release spring, rotate mechanism towards bottom of operator console, and slide assembly to the side to remove.

15. Remove bail switch.

Installing bail switch, speed potentiometer, or directional switch

1. Installation is reverse of removal.