Clarke Clean Track L24 56317170 User manual

Clean Track®L24
5/12 Form No. 56043161
Service Manual
Clarke Clean Track®L24, Model 56317170

ii - Form No. 56043161 - Clean Track®L24
Contents
Introduction............................................................................................................6
Parts and Service...............................................................................................6
Nameplate..........................................................................................................6
Part Number.......................................................................................................6
Serial Number ....................................................................................................6
Transporting the Machine...................................................................................6
Towing................................................................................................................6
Other Manuals and Information Sources for Your Machine................................7
Cautions and Warning Symbols.........................................................................7
Read all instructions before using......................................................................7
General Safety Instructions................................................................................7
Technical Specications .....................................................................................9
General Maintenance..........................................................................................10
Maintenance Schedule.....................................................................................10
Batteries and Chargers ....................................................................................11
Lubricating the Machine...................................................................................11
Know Your Machine.............................................................................................13
Major Components...........................................................................................13
Major Components (continued)........................................................................14
Control Panel ...................................................................................................15
Control Panel Switch Functions .......................................................................16
Control Panel Indicators...................................................................................19
General Guidelines for Control Panel Indicators..............................................20
Solution System...................................................................................................21
Functional Overview.........................................................................................21
Circuit Overview - Solution Auto Mode (Solenoid Valve Circuit).......................22
Circuit Overview - Solution Auto Mode (Solution Pump Circuit).......................22
Solution System Maintenance..........................................................................24
Solution Tank.................................................................................................24
Solution Filter................................................................................................24
Troubleshooting Guide.....................................................................................24
Solution System - Electrical Troubleshooting Guide ........................................24
Possible Symptoms.......................................................................................24
Symptom One - No Solution Flow While in the Scrub Auto Solution Mode ..25
Symptom Two - Solution Pump Will Not Operate .........................................26
Solenoid Valve Removal...................................................................................27
Solenoid Valve Disassembly and Cleaning......................................................27
Solution Filter and Shutoff Valve Removal.......................................................27
Solution Pump Removal...................................................................................27

Form No. 56043161 - Clean Track®L24 - iii
Scrub System ......................................................................................................28
Functional Overview.........................................................................................28
Circuit Overview - Scrub Brush Motor M4 and M5 Run Function.....................28
M3 - Scrub Brush Actuator Lift Motor Function ................................................30
Scrub System Low-voltage Cut-out Function...................................................30
Scrub Brush Deck Removal.............................................................................31
Scrub Brush Motor Removal............................................................................33
Scrub Brush Belt Replacement........................................................................33
Scrub Brush System Maintenance...................................................................34
Scrub Brush Lift Actuator Removal ..................................................................34
Recovery System.................................................................................................37
Functional Overview.........................................................................................37
Vacuum Motor Control Circuit Overview (Auto Mode) .....................................38
Vacuum / Recovery System Service Maintenance Checklist...........................40
Troubleshooting Guide.....................................................................................40
Vacuum Leaks...............................................................................................40
Restrictions ...................................................................................................40
Maintenance of Recovery Tank Float Switch....................................................41
Maintenance of the Vacuum Motor Inlet Screens.............................................42
Spray Nozzle Maintenance ..............................................................................42
Vacuum Shoe Maintenance..............................................................................43
Vacuum Motor Removal...................................................................................44
Recovery Tank Removal...................................................................................44
Caster Wheel Removal ....................................................................................46
Wheel Drive System............................................................................................47
General Functional Overview...........................................................................47
Drive Motor System Function...........................................................................48
Electrical Diagram.........................................................................................48
A1 Speed Control Pin Connections..................................................................49
Low Current A1 Speed Control Pin Key Detail..............................................49
Wheel Drive Troubleshooting Guide.................................................................50
Drive Motor Transaxle Removal.......................................................................51
Drive Motor Transaxle Removal (continued)....................................................52
Drive Wheel Removal.......................................................................................53
5K Directional/Throttle Potentiometer (R1) ......................................................54
Testing the 5K Directional/Throttle Potentiometer R1...................................54
Removing the R1 5K Potentiometer..............................................................55
Installing and Adjusting the R1 5K Potentiometer.........................................55
100K Potentiometer (R2)..................................................................................56
Test Procedure..............................................................................................56
R2 Potentiometer Removal...........................................................................56

iv - Form No. 56043161 - Clean Track®L24
Electrical System.................................................................................................57
Batteries...........................................................................................................57
If your machine shipped with batteries installed, do the following:................57
If your machine shipped without batteries installed do the following:............57
When Servicing Batteries..............................................................................57
Specic Wet Cell Battery Information...............................................................58
Wet Cell Battery Specications .....................................................................58
Wet Cell Battery Charger Specications .......................................................58
Description of the Low-voltage Cutout Feature................................................59
Description of the Battery Condition Indicators................................................59
Explanation of Battery Indicator Lights and Voltage Ranges ...........................59
Charging Wet Batteries....................................................................................60
When Servicing Wet Batteries..........................................................................60
If your machine shipped with an onboard battery charger,
do the following:.........................................................................................60
If your machine shipped without an onboard battery charger,
do the following:.........................................................................................60
Checking the Battery Water Level....................................................................60
Charging Gel (VRLA) Batteries........................................................................61
When Servicing Gel (VRLA) Batteries..............................................................61
If your machine shipped with an onboard battery charger,
do the following:.........................................................................................61
If your machine shipped without an onboard battery charger,
do the following:.........................................................................................62
Wet Cell Battery Maintenance..........................................................................62
Battery Testing..................................................................................................62
Actuator Drive Nut Adjustment.........................................................................63
General Instructions......................................................................................63
Adjusting the Drive Nut on the Scrub Brush Lift Actuator..............................64
Curtis Controller Diagnostics............................................................................66
Diagnostics Method A - LED Panel and Speed Control
Fault Code Indicator...................................................................................66
Diagnostics Method B - Curtis Programmer..................................................66
Diagnostic History.........................................................................................67
Speed Control Programming Options ..............................................................69
Installation Checkout for the Curtis Speed Controller ......................................69
Programming Vehicle Speed Changes ............................................................70
Maintenance.....................................................................................................70
Functional Overview of the Main Control Board...............................................70
Troubleshooting Guide.....................................................................................71
Main Controller Error Codes.............................................................................71

Form No. 56043161 - Clean Track®L24 - v
Service Test Mode............................................................................................73
To Enter the Service Test Mode....................................................................73
Panel Indicators – Service Test Mode...........................................................73
To Run the Wheel Drive Motor......................................................................74
To Switch the Solution System On and Off ...................................................74
To Lower and Raise the Scrub Deck.............................................................74
To Switch the Vacuum Motors On and Off ....................................................75
To Extend and Retract the Vacuum Shoe Pin...............................................75
To Switch the Scrub Brush Motors On and Off .............................................75
To Switch the On-board Chemical Mixing System On and Off......................76
Main Control Programming Options.................................................................76
Selecting the Low Voltage Cutout Threshold................................................76
Selecting the Scrub Pressure Current Limits................................................76
Restoring the Scrub Pressure Limits to the Factory Default Settings...........78
Recall Of Stored Error Codes .......................................................................78
Turning Fault Detection On or Off.................................................................78
Displaying the Control Unit Revision Level...................................................79
Enabling/Disabling the Chemical Mixing System..........................................79
Detergent Dilution Ratio Selection................................................................80
Factory Reset................................................................................................80
Electrical Wiring Diagram/Schematic...................................................................82
Electrical Ladder Diagram ...................................................................................83
Detergent (Chemical Mixing) System Plumbing Schematic ................................84
Detergent (Chemical Mixing) System Preparation and Use................................85
Note: All references to right, left, front, or rear in this manual are as seen from the
operator’s standpoint.

6- Form No. 56043161 - Clean Track®L24
Introduction
This manual will help you get the most from your Clarke machine. Read it thoroughly before servicing the machine.
Note: Bold numbers and letters in parentheses indicate items illustrated in the Know Your Machine section.
Parts and Service
Repairs should be performed by your Authorized Clarke Center, that employs factory trained service personnel and
maintains an inventory of original replacement parts and accessories.
Call the Clarke Dealer named below for repair parts or service. Please specify the Model Number (same as the Part
Number) and Serial Number when discussing your machine.
(Dealer, afx service sticker here.)
Nameplate
The Part (Model) Number and Serial Number of your machine are
shown on the Nameplate located in the battery compartment. This
information is needed when ordering repair parts for the machine.
Use the space below to note the Part (Model) Number and Serial
Number of your machine for future reference.
Part Number
Serial Number
Transporting the Machine
Caution!
Before transporting the machine on an open truck or trailer, make sure that:
• The machine is tied down securely.
• All access doors and covers are secured (tape and strap as needed).
Towing
Caution!
If the machine must be towed or pushed, make sure the Master On/Off Key Switch (A) is in the Off position and do not
move the machine faster than a normal walking pace (2-3 mph, 3-5 kph) and for short distances only.
Note: Disconnecting the wheel drive motor wiring connector will make a disabled machine easier to push.

Form No. 56043161 - Clean Track®L24 - 7
Other Manuals and Information Sources for Your Machine
• Instructions for Use (English, Spanish and French) – Form Number 56091061
• Parts List – Form Number 56042598
These manuals can be found on the following Clarke electronic supported databases:
• Clarke website: www.clarkeus.com
• Clarke CustomerZone™
• EzParts service / parts CD-ROM
Cautions and Warning Symbols
Clarke uses the symbols below to signal potentially dangerous conditions. Read this information carefully and take the
necessary steps to protect personnel and property.
Danger!
Is used to warn of immediate hazards that will cause severe personal injury or death.
Warning!
Is used to call attention to a situation that could cause severe personal injury.
Caution!
Is used to call attention to a situation that could cause minor personal injury or damage to the machine or other property.
Read all instructions before using.
General Safety Instructions
Specic Cautions and Warnings are included to warn you of potential danger of machine damage or bodily harm.
Warning!
• This machine should only be used by properly trained and authorized persons.
• While on ramps or inclines, avoid sudden stops when loaded. Avoid abrupt sharp turns. Use low speed down hills.
Clean only while ascending (driving up) the ramp.
• Keep sparks, ame and smoking materials away from batteries. Explosive gases are vented during normal
operation.
• Charging the batteries produces highly explosive hydrogen gas. Charge batteries only in well-ventilated areas away
from open ame. Do not smoke while charging the batteries.
• Remove all jewelry when working near electrical components.
• Turn the Key Switch off (O) and disconnect the batteries before servicing electrical components.
• Never work under a machine without safety blocks or stands to support the machine.

8- Form No. 56043161 - Clean Track®L24
• Do not dispense ammable cleaning agents, operate the machine on or near these agents, or operate in areas where
ammable liquids exist.
• Do not clean this machine with a pressure washer.
• Do not operate this machine on ramps or inclines of more than a two-percent gradient.
• Only use the brushes provided with the appliance or those specied in the instruction manual. The use of other
brushes may impair safety.
Caution!
• This machine is not approved for use on public paths or roads.
• This machine is not suitable for picking up hazardous dust.
• Use care when using scarier discs and grinding stones. Clarke will not be held responsible for any damage to oor
surfaces caused by scariers or grinding stones.
• When operating this machine, ensure that third parties, particularly children, are not endangered.
• Before performing any service function, carefully read all instructions pertaining to that function.
• Do not leave the machine unattended without rst turning the Key Switch off (O), removing the key and securing the
machine.
• Turn the Key Switch off (O) and remove the key before changing the brushes, and before opening any access
panels.
• Take precautions to prevent hair, jewelry or loose clothing from becoming caught in moving parts.
• Use caution when moving this machine in below freezing temperature conditions. Any water in the solution or
recovery tanks, or in the hose lines could freeze, causing damage to valves and ttings. Flush with windshield
washer uid.
• The batteries must be removed from the machine before the machine is scrapped. The disposal of the batteries
should be safely done in accordance with your local environmental regulations.
• Do not use on surfaces having a gradient exceeding that marked on the machine.
• All doors and covers are to be positioned as indicated in the instruction manual before using the machine.
• Refer to the Electrical System section at back of this manual for additional specic battery charger warnings.
Save These Instructions

Form No. 56043161 - Clean Track®L24 - 9
Technical Specifications
Voltage 24 Volt
Power Source (4) 6 volt batteries (wet acid and gel cell available)
Onboard Battery Charger 24 volt, 25 amp Wet/Gel Compatible
Solution Control Precision-flow electric pump/solenoid valves
Solution Tank 20 gal. [76 L]
Recovery Tank 20 gal. [76 L]
Solution Capacity 20 gal [76 L]
Solution Pump 100 psi diaphragm demand
Restoration Mode Maintenance Mode Pre-spray Mode
Solution
System Flow Rates 0.81 gpm [3,1 L/min] 0.26 gpm [1 L/min] 0.93 gpm [3,5 L/min]
Type Cylindrical, 24” [61 cm] scrub path
Brush Motors (2) ½ hp (375 watt), permanent magnet, 960 RPM
Brushes Dual 24” [61 cm] dual counter-rotating cylindrical, with debris hopper
Scrub System
Brush Speed 960 RPM
Vacuum Motor (2) 24 VDC, three-stage bypass
Airflow 93 cfm [44 L/sec]
Water Lift 70 in H2O [17,4 km/hr]
Vacuum
System
Vacuum Shoes Dual 13.5” [34 cm] dual pivoting laminar flow, 45 lb down-pressure
Drive Motor 0.4 hp (300 watt) variable forward and reverse, max speed - 3 mph [4.83 km/hr]
Drive Wheels (2) 7 in. [18 cm] dia. foam-filled, gray non-marking
Drive System
Gradeability Transport – 15.4% (8.3°) Cleaning – 12.5% (7.1°)
Transport Maintenance
Mode Restoration Mode Fast Pre-spray Mode Heavy Pre-spray Mode
Machine Speed 220 ft/min
[4 km/hr] 90 ft/min [1,6 km/hr] 50 ft/min [0,9 km/hr] 150 ft/min [2,7 km/hr] 100 ft/min [1,8 km/hr]
Coverage Rate Maintenance Mode - 10,800 ft2/hr Restoration Mode - 6,000 ft2/hr
Sound Pressure Level IEC 60335-2-72: 2002 Amend. 1:2005,
ISO 11201 – 69 dB (A) IEC 60335-2-72: 2002 Amend. 1:2005, ISO 3744 – 86.9 Lwa
Machine Dimensions Length – 56” [142 cm] Width – 27” [69 cm] Height – 43.5” [110 cm]
Gross Weight 810 lbs [367 kg]
On-board Chemical Mixing System
Refillable Cartridge Capacity 1.25 gal [4,75 L]
Available Dilution Rates 32:1, 50:1, 64:1, 100:1, 128:1, 150:1, 200:1, 256:1, 300:1
Low Detergent Warning Standard

10 - Form No. 56043161 - Clean Track®L24
General Maintenance
Maintenance Schedule
Maintenance intervals given are for average operating conditions. Machines used in severe operational environments
may require service more often.
Maintenance Item Daily Weekly Monthly Yearly
Charge Batteries X
Check/Clean Tanks and Hoses X
Check/Clean the Brushes X
Clean Vacuum Inlet Screens X
Empty and Clean Debris Hopper X
Clean Vacuum Shoes X
Check the Water Level on each Battery Cell X
(does not apply to gel cell batteries)
Inspect and Clean Solution Filter X
Clean Solution Spray Nozzles X
Purge Chemical Mixing System X
Lubricate the Machine X
* Check the Carbon Brushes X
Note: See the individual machine system sections for maintenance information.
* Have Clarke check the vacuum motor carbon brushes once a year or after 300 operating hours. Check the brush
motor and drive motor carbon brushes every 500 hours or once a year.
Warning!
Turn the Key Switch off and disconnect the batteries before servicing the machine.
• Check the vacuum motor carbon brushes once a year or after 300 operating hours.
• Check brush and wheel drive motor(s) carbon brushes (four per motor) once a year or after 500 operating hours.
• The original (new) length of each carbon brush is 1” (25,4mm) on all 24-volt machine models brush and wheel drive
motors.
• Replace the carbon brushes on all motors when the brushes are shorter than 3/8” (9.5mm) to obtain the same motor
efciency as new brushes.
Important!
Motor damage resulting from failure to service the carbon brushes is not covered under warranty. See the Limited
Warranty Statement.

Form No. 56043161 - Clean Track®L24 - 11
Batteries and Chargers
Attention: See the Electrical System section for battery installation, battery maintenance and charger
system requirements.
Lubricating the Machine
Lubricate the following components:
Refer to Figure 1.
• Once a month lubricate the General
Pivot Points for the Brush Linkage
(A). For best results, use a silicone
spray.
• Once per quarter, grease the Rear
Caster Wheel Swivel (B). Wipe off
any excess grease to avoid staining
carpet.
Figure 1
Front

12 - Form No. 56043161 - Clean Track®L24
Clarke®Clean Track®L24
PM Checklist
Defect Codes
Customer A needs adjustment
B binding
Address C dirty or contaminated
D damaged, bent or torn
City St Zip L leaks
M missing
Model Serial Hours W worn out
Ref
Operational Inspection Items
OK
Defect Codes
(circle)
Does
Not
Work
1 Drive Paddle Operation (check for fwd/rev drive and any neutral creep) A B D
2 Drive System Performance (speed changes min/max) noisy sluggish
3 Scrub System (raise/lower, brush motor on/off) A B D
4 Vacuum Performance (sealed water lift and 1” open-hole adapter) C L W
5 Solution control (on/off and flow volume settings; three flow settings) A B L
6 Battery Charger (auto turn on and off) D
7 Main Controller Special Program Options (see the Electrical System/
Main Control Programming Options section in this manual) A
Ref
Visual Inspection Items
Comments
OK
Defect Codes
(circle)
Does
Not
Work
8 Scrub Brushes, check for wear and tear D M W
9 Scrub Brush Motor(s), check carbon brushes for wear 500 hours B C W
10 Scrub Brush Motor(s), check gearboxes B D L
11 Brush Drive Plate Retainer Clips & flex couplers C D M
12 Scrub Deck Lift Motor, Skirt & Side Wheel D M W
13 Solution Solenoid Valve C L W
14 Solution Pump and Hoses C L W
15 Solution Tank, Delivery Hoses and Filter clean filter
screen C L
16 Vacuum Motor Carbon Brushes (wear limit 3/8”) 300 hours B C W
17 Vacuum motor inlet filter (located in recovery tank clean screen C D M
18 Recovery Tank Cover Gasket L M W
19 Recovery Tank Drain Hose & Cap C D L
20 Battery Condition (load test, clean & water) C W
21 Drive Wheel Transaxle Motor - Check Carbon Brushes 500 Hours B C D W
22 Transaxle Drive Tires tread wear W
23 Rear Chassis Caster Wheel (lubricate) tread wear W

Form No. 56043161 - Clean Track®L24 - 13
Know Your Machine
Major Components
As you read this manual, you will occasionally run across a bold number or letter in parentheses - example: (2). These
numbers refer to an item shown on this page unless otherwise noted. Refer back to this page whenever necessary to
pinpoint the location of an item mentioned in the text. Note: Detailed explanations of each item illustrated on the next
three pages are provided later in this section.
1 Solution Fill Cap
2 Bottle Holders
3 Recovery Tank Dome Lid
4 Recovery Tank
5 Detergent Cartridge Access Cover
6 Detergent Cartridge (Chemical Mixing System)
7 Scrub Deck Rollers
8 Scrub Deck
9 Idler Assembly
10 Extraction/Vacuum Shoes
11 Drive Wheel
12 Vacuum Motor Inlet Screens
13 Solution Tank
14 Onboard Battery Charger
15 Maintenance Spray Nozzle
16 Restoration Spray Nozzle
17 Battery Pack Connector
Figure 2

14 - Form No. 56043161 - Clean Track®L24
Major Components (continued)
18 Control Panel
19 Operator Control Handle
20 Drive Paddle
21 Speed Control Knob
22 Solution Drain Hose / Level Indicator
23 10-amp Control Circuit Circuit Breaker
24 30-amp Drive Motor Circuit Breaker
25 Recovery Tank Drain Hose
26 Rear Caster
27 Accessory Port
28 Solution Filter
29 Debris Hopper
30 Vacuum Recovery Hose
31 Solution Shutoff Valve
32 Recovery Drain Hose Cap
Figure 3

Form No. 56043161 - Clean Track®L24 - 15
Control Panel
A Key Switch (Main Power)
B Detergent System Switch
C Solution/Pre-spray Switch
D Display Panel
D1 Detergent (Chemical Mixing) System Indicator
D2 Hour Meter/Battery Indicator
D3 Fault Indicator
D4 Chemical Mixing System Ratio Indicator
D5 Maintenance Extract Mode Indicator
D6 Restoration Extract Mode Indicator
D7 Fast Pre-spray Mode
D8 Heavy Pre-spray Mode
D9 Battery Low Indicator
E Vacuum Switch
F Speed Control Fault Code Indicator
G Wand Switch
H Scrub OFF Switch (red)
J Scrub ON Switch (green)
!
A
B
C
E
HJ
D
D1
D3 D5 D6
D8
D9
D
G
D2
D4
D7
F

16 - Form No. 56043161 - Clean Track®L24
Control Panel Switch Functions
Key Switch (A)
Main power switch
Detergent System Switch (B)
This switch controls the on-board chemical mixing (detergent) system.
• Pressing and releasing this switch while the solution system is active will toggle the detergent system on and off.
• The Chemical Mixing System Indicator (D1) informs the operator when the detergent bottle is low. Pressing and
holding the Detergent System Switch (B) for two seconds after the detergent bottle has been relled will reset the
Chemical Mixing System Indicator (D1) on the display to show full.
• Holding the Detergent System Switch (B) and the Solution/Pre-spray Switch (C) at the same time for two seconds will
switch the machine into the purge mode.
Solution/Pre-spray Switch (C)
If the scrub system is off, pressing this switch will cause the machine to enter fast pre-spray mode. The following will
occur:
• The scrub system will be enabled with the system congured for fast pre-spray mode, and the scrub deck will be
lowered while the extraction/vacuum shoes stay up in the locked position.
• The solution system will be enabled for fast pre-spray mode.
• The detergent system will be enabled for pre-spray mode.
• The travel speed will be limited to a fast pre-spray mode speed setting.
• As soon as the throttle is moved from the neutral position the scrub brushes will start turning. If the direction is
forward, the solution and detergent ow will start. If the direction is reverse, the solution and detergent ow will be
stopped.
• The Fast Pre-spray Mode indicator (D7) will indicate the scrub system is activated in fast pre-spray mode.
• The Scrub ON Switch (J), Solution Pre-spray Switch (C) and Detergent System Switch (B) will be green if the scrub
system is on and the fast pre-spray mode has been selected. The indicators will be off if the scrub system is off. The
indicators will be yellow if the pre-spray mode has been selected but the throttle is in neutral.
• Pressing the Scrub ON Switch (J) in the fast pre-spray mode switches the machine to the heavy pre-spray mode.
In this mode the machine moves slower and more solution is sprayed on the carpet. The Heavy Pre-spray Mode
indicator (D8) will indicate that the scrub system is in heavy pre-spray mode.
If the pre-spray mode is active, pressing this switch will cause the following to occur:
• The scrub brushes will turn off and the scrub deck will rise to the up position.
• The solution ow will be stopped.
• The detergent ow will be stopped.
• The travel speed limit will return to the transport speed setting.
• The display will indicate the nozzles are turned off and the deck is in the raised position.
• The scrub off indicator will be green if the scrub system is off and ready to be activated. The indicator will be off if
the scrub system has been activated. If the scrub system has been turned off and the scrub deck is not up yet, the
indicator will be red. If there is a fault in the scrub system, this indicator will ash red.

Form No. 56043161 - Clean Track®L24 - 17
If the scrub system is activated in the maintenance or restoration extraction mode, pressing this switch will cause the
following to occur:
• The solution system will toggle between disabled and enabled. The solution ow will only turn on when the throttle is
moved from the neutral position in the forward direction. The solution ow will turn off if the throttle returns to neutral
or is moved to reverse.
• The solution indicator will be green if the solution is on. If the solution is off, this indicator will be off. The indicator
will be yellow if the solution has been enabled but the throttle is in neutral. If there is a solution system fault, the
indicator will ash yellow.
Display Panel (D)
Refer to the Control Panel Indicators subsection for a description of the display functions.
Vacuum Switch (E)
This switch toggles the vacuum system on or off.
• The vacuum will only turn on when the throttle is moved from the neutral position. It will remain on for 10 seconds
after the throttle returns to neutral.
• The vacuum indicator will be green if the vacuum is on. It will ash green if the vacuum is in the 10-second delayed-
off condition. If the vacuum is off, this indicator will be off. The indicator will be yellow if the vacuum has been
enabled but the throttle is in neutral. If there is a vacuum system fault, the indicator will ash yellow.
Speed Control Fault Code Indicator (F)
If a speed control fault occurs (error code 3), the Speed Control Fault Code Indicator in the Wand Switch (G) will ash
the fault code produced by the Curtis speed control. Refer to the Electrical/Curtis Controller Diagnostics section for
details.
Wand Switch (G)
This switch is used when an external scrub wand is used. Pressing this switch will turn the vacuum on continuously
without regard to the throttle position. It will also enable the solution pump. If the scrub system was on, it will be turned
off. This includes turning off the scrub brushes, raising the scrub deck and turning the solution ow to the scrub deck
off. The indicator in the Wand Switch will be green when the wand function is on. Otherwise it will be off.
Scrub OFF Switch (H)
Pressing this switch when the scrub system is active will cause the following to occur:
• The scrub brushes will turn off and the scrub deck will rise to the up position.
• The solution ow will be stopped.
• The vacuum will shut off after a 10-second delay
• The travel speed limit will return to the transport speed setting.
• The display will indicate the nozzles are turned off and the deck is in the raised position.
• The scrub off indicator will be green if the scrub system is off and ready to be activated. The indicator will be off if
the scrub system has been activated. If the scrub system has been turned off and the scrub deck is not up yet, the
indicator will be red. If there is a fault in the scrub system, this indicator will ash red.

18 - Form No. 56043161 - Clean Track®L24
Scrub ON Switch (J)
If the scrub system is off or in the restoration extract mode, pressing this switch will cause the machine to enter
maintenance extract mode. The following will occur:
• The scrub system will be enabled with the system congured for the maintenance mode, and the scrub deck will be
lowered.
• The vacuum system will be enabled.
• The solution system will be enabled for the maintenance extract mode.
• The travel speed will be limited to the maintenance extract mode speed setting.
• As soon as the throttle is moved from the neutral position, the scrub brushes will start turning and the vacuum will
turn on. If the direction is forward, the solution ow will start. If the direction is reverse, the solution ow will be
stopped.
• The Maintenance Extract Mode Indicator (D5) will indicate that the scrub system is activated in the maintenance
extract mode.
If the scrub system is in the maintenance extract mode, pressing this switch will cause the machine to enter the
restoration extract mode. The following will occur:
• The scrub system will be enabled with the system congured for the restoration extract mode.
• The vacuum system will be enabled.
• The solution system will be enabled for restoration extract mode.
• The travel speed will be limited to the restoration extract mode speed setting.
• As soon as the throttle is moved from the neutral position, the scrub brushes will start turning and the vacuum will
turn on. If the direction is forward, the solution ow will start. If the direction is reverse, the solution ow will be
stopped.
• The Restoration Extract Mode Indicator (D6) will indicate that the scrub system is activated in the restoration extract
mode.

Form No. 56043161 - Clean Track®L24 - 19
Control Panel Indicators
Chemical Mixing System Indicator (D1)
The machine has a Chemical Mixing System Indicator in the lower left corner of the display. When the detergent
(chemical) system is enabled, the indicator will show a detergent bottle icon. When the detergent system is disabled,
the detergent bottle icon will have a cross through it. If the operator chooses a specic mix ratio on the detergent bottle,
it will be displayed in the Chemical Mixing System Ratio Indicator (D4) to the right of the Chemical Mixing System
Indicator.
Hour Meter (D2)
The Hour Meter is shown in the upper left corner of the display for ve seconds after the machine is turned on. The
Hour Meter displays the total time spent scrubbing for the life of the machine.
Battery Indicator (D2)
After ve seconds of operation, the battery condition indicator replaces the hour meter in the upper left corner of the
display. It gives a relative indication of the state of charge of the battery pack. A fully-charged battery pack will measure
above 25.1 volts with no load applied (2.09 volts per cell). The Clean Track®L24 is equipped with a low-voltage
cutout feature that will turn the scrub system off when the batteries are discharged to their minimum level. There are
two different cutout levels to accommodate different battery types. See the Electrical/Main Control Programming
Options section for details. The voltage levels for the various indications are as follows (the voltages shown represent
the voltage under load):
Indicator Voltage Levels For Standard Cutout Level:
• 5 Bars = full charge down to 23.8 volts
• 4 Bars = 23.7 volts down to 23.6 volts
• 3 Bars = 23.5 volts down to 23.2 volts
• 2 Bars = 23.1 volts down to 22.5 volts
• 1 Bar = 22.4 volts down to 21.7 volts
• 0 Bars = 21.6 volts down to 20.6 volts
• Low Voltage Warning Screen = less than 20.5 volts. The scrub system will shut down.
Indicator voltage levels for alternate cutout level:
• 5 Bars = full charge down to 23.8 volts
• 4 Bars = 23.7 volts down to 23.6 volts
• 3 Bars = 23.5 volts down to 23.3 volts
• 2 Bars = 23.2 volts down to 22.9 volts
• 1 Bar = 22.8 volts down to 22.3 volts
• 0 Bars = 22.2 volts down to 21.8 volts
• Low Voltage Warning Screen = less than 21.7 volts. The scrub system will shut down.
Note:Oncethelow-voltagecutoutlevelhasbeenreachedandtheBatteryLowIndicator(D9)isdisplayed)
thebatteriesmustbeFULLYrechargedtoresetthebatteryconditionindicator.Thescrubsystemwill
notfunctionuntiltheindicatorhasbeenreset.

20 - Form No. 56043161 - Clean Track®L24
Fault Indicator (D3)
If an electrical fault occurs, the Fault Indicator will display the associated error code immediately. The error code
number will be displayed with a wrench icon right of the battery condition indicator. Refer to the Error Code section for
descriptions.
Note:Ifaspeedcontrolfaultoccurs(errorcode3),thewandindicatorwillflashthefaultcodeproducedbythe
Curtisspeedcontrol.RefertotheElectrical/Curtis Controller Diagnosticssectionfordetails.
Chemical Mixing System Ratio Indicator (D4)
Displays the specic mix ratio on the detergent bottle as selected by the operator.
Maintenance Extract Mode Indicator (D5)
Indicates that the machine is in the maintenance extraction mode.
Restoration Extract Mode Indicator (D6)
Indicates that the machine is in the restoration extraction mode.
Fast Pre-spray Mode indicator (D7)
Indicates that the machine is in the fast pre-spray mode.
Heavy Pre-spray Mode indicator (D8)
Indicates that the machine is in the heavy pre-spray mode.
Battery Low Indicator (D9)
Displays the “attention” symbol when the batteries require recharging. Note that the vacuum motors will shut off 30
seconds after the Battery Low indicator is displayed.
General Guidelines for Control Panel Indicators
In general, the following guidelines apply to the control panel indicators:
• A ashing green or yellow indicator means that a fault has occurred in the particular system. An example of this
would be an over-current fault.
• A yellow indicator means that the particular function has been enabled but is not currently on. For example, if a scrub
mode is selected and the throttle is in neutral, the scrub system, vacuum and solution indicators will all be yellow.
This indicated that the systems are enabled and ready to turn on when the throttle is moved to forward or reverse.
• A green indicator means that the particular system is on.
• A ashing green indicator means that the particular system is in a delayed-off condition. An example of this is when
a scrub mode is selected and the throttle goes from forward or reverse to neutral. When this happens, the vacuum
indicator will ash green indicating that the vacuum is still on, but that it will be turning off after the delay period.