Nilfisk-Advance Advenger 2800ST User manual

9/09 FORM NO. 56043121
QUICKSTART SERVICE MANUAL
Advance MODELS: 56601000, 56601001, 56601002, 56601003, 56601004
56601005, 56601006, 56601007, 56601008, 56601009, 56601010, 56601011
56601012, 56601013, 56601019, 56601020
Nilfisk MODELS: 56601014, 56601015, 56601016
Advenger™
2800ST, 3400ST
BR 755, BR 855

2- FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
TABLE OF CONTENTS
INTRODUCTION .......................................................................................................................................................................................... 2
QUICK START SERVICE MANUAL PURPOSE........................................................................................................................................... 2
GENERAL MACHINE DESCRIPTION.......................................................................................................................................................... 2
PARTS AND SERVICE ................................................................................................................................................................................. 2
NAMEPLATE ................................................................................................................................................................................................ 2
CAUTION AND WARNING SYMBOLS......................................................................................................................................................... 3
GENERAL SAFETY INSTRUCTIONS.......................................................................................................................................................... 3
RELATED REFERENCE SOURCES............................................................................................................................................................ 4
DIAGNOSTIC AND SERVICE TOOLS ......................................................................................................................................................... 4
TECHNICAL SPECIFICATIONS................................................................................................................................................................... 5
TRANSPORTING THE MACHINE................................................................................................................................................................ 8
TIE-DOWN POINTS ..................................................................................................................................................................................... 8
TOWING THE MACHINE ............................................................................................................................................................................. 8
JACKING POINTS........................................................................................................................................................................................ 9
EMERGENCY STOP KNOB......................................................................................................................................................................... 9
KNOW YOUR MACHINE ........................................................................................................................................................................... 10
MACHINE FRONT RH VIEW...................................................................................................................................................................... 10
MACHINE REAR LH VIEW .........................................................................................................................................................................11
CONTROL PANEL – ADVENGER / BR 755, 855....................................................................................................................................... 12
CONTROL PANEL – ST ............................................................................................................................................................................. 13
BASIC MACHINE OPERATION.................................................................................................................................................................. 14
MAIN CONTROLLER ERROR CODES - ADVENGER / BR 755, 855 AND ST ......................................................................................... 15
SPEED CONTROL ERROR FLASH CODES............................................................................................................................................. 16
ERROR CODE SYSTEM DIAGNOSTICS - ADVENGER / BR 755, 855 AND ST...................................................................................... 17
UNDERSTANDING CONTROL OF SQUEEGEE, SCRUB, AND RECOVERY SYSTEMS VIA MODES................................................... 19
SQUEEGEE SYSTEM................................................................................................................................................................................ 20
SQUEEGEE LIFT ACTUATOR CIRCUIT ERROR CODES AND MEASUREMENTS – ADVENGER / BR 755, 855................................. 21
TROUBLESHOOTING SQUEEGEE ISSUES ............................................................................................................................................ 21
SQUEEGEE ADJUSTMENTS .................................................................................................................................................................... 22
SQUEEGEE LIFT ACTUATOR REPLACEMENT – ADVENGER / BR 755, 855 ........................................................................................ 23
SQUEEGEE LIFT ACTUATOR DRIVE NUT ADJUSTMENT – ADVENGER / BR 755, 855....................................................................... 24
SQUEEGEE LIFT CABLE REPLACEMENT – ADVENGER / BR 755, 855................................................................................................ 25
SQUEEGEE LIFT CABLE REPLACEMENT – ST...................................................................................................................................... 26
SQUEEGEE LIFT CABLE ADJUSTMENT – ST......................................................................................................................................... 27
STEERING COLUMN ASSEMBLY SHROUD REMOVAL .......................................................................................................................... 28
SCRUB SYSTEM ....................................................................................................................................................................................... 29
BRUSH MOTOR CONTROL AND LOAD CIRCUIT ERROR CODES AND MEASUREMENTS ................................................................ 31
SCRUB DECK LIFT ACTUATOR ERROR CODES AND MEASUREMENTS – ADVENGER / BR 755, 855 ............................................. 32
TROUBLESHOOTING SCRUB SYSTEM ISSUES ................................................................................................................................... 32
SCRUB DECK LIFT ACTUATOR REPLACEMENT – ADVENGER / BR 755, 855..................................................................................... 33
SCRUB DECK LIFT ACTUATOR DRIVE NUT ADJUSTMENT – ADVENGER / BR 755, 855 ................................................................... 34
SCRUB DECK REMOVAL-DISC ................................................................................................................................................................ 35
SCRUB BRUSH MOTOR REMOVAL-DISC ............................................................................................................................................... 36
SCRUB DECK REMOVAL-CYLINDRICAL................................................................................................................................................. 38
SCRUB BRUSH MOTOR REMOVAL-CYLINDRICAL ................................................................................................................................ 39
RECOVERY SYSTEM................................................................................................................................................................................ 40
RECOVERY SYSTEM ERROR CODES AND MEASUREMENTS ............................................................................................................ 42
TROUBLESHOOTING RECOVERY SYSTEM ISSUES............................................................................................................................. 43
REPLACING A VACUUM MOTOR ............................................................................................................................................................. 44

FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855 - 1
TABLE OF CONTENTS
SOLUTION SYSTEM ................................................................................................................................................................................. 46
SOLUTION & AXP/EDS SYSTEM ERROR CODES AND MEASUREMENTS - ADVENGER / BR 755, 855 AND ST .............................. 47
TROUBLESHOOTING SOLUTION & AXP/EDS SYSTEM ISSUES........................................................................................................... 47
SOLUTION SYSTEM DIAGRAM................................................................................................................................................................ 48
SOLUTION SYSTEM CONTROL ............................................................................................................................................................... 49
REPLACING THE SOLUTION SOLENOID VALVE.................................................................................................................................... 50
WHEEL DRIVE SYSTEM ........................................................................................................................................................................... 51
WHEEL DRIVE CIRCUIT ERROR CODES AND MEASUREMENTS ........................................................................................................ 52
TROUBLESHOOTING DRIVE WHEEL ISSUES........................................................................................................................................ 52
REPLACING THE DRIVE WHEEL ASSEMBLY ......................................................................................................................................... 53
REPLACING THE DRIVE TIRE.................................................................................................................................................................. 54
INSPECTING/REPLACING THE DRIVE WHEEL ASSEMBLY CARBON BRUSHES................................................................................ 55
REPLACING THE REAR WHEELS............................................................................................................................................................ 56
ELECTRICAL SYSTEM ............................................................................................................................................................................. 57
ACCESS TO PANEL: CHEMICAL PUMP, CHARGER INTERLOCK, FUSES, CONTACTORS, SPEED CONTROL ............................... 57
THROTTLE POTENTIOMETER WIPER MEASUREMENT (NEUTRAL POSITION)................................................................................. 57
CONTROL BOARD J1, J2, AND J3 PIN OUTS AND TEST POINTS......................................................................................................... 58
CURTIS SPEED CONTROL INSTALLATION CHECKOUT PROCEDURE................................................................................................ 60
REPLACING THE OPERATOR CONTROL PANEL ................................................................................................................................... 61
PROGRAMMING FUNCTIONS.................................................................................................................................................................. 63
SERVICE TEST MODE .............................................................................................................................................................................. 63
CHANGING CONTROL BOARD PROGRAM SETTINGS.......................................................................................................................... 65
CHANGING PROGRAM SETTINGS – ADVENGER / BR 755, 855........................................................................................................... 66
CHANGING PROGRAM SETTINGS – ST ................................................................................................................................................. 67
MAINTENANCE SCHEDULES .................................................................................................................................................................. 68
OPERATOR PREVENTIVE MAINTENANCE - MACHINE IN USE ............................................................................................................ 68
OPERATOR PREVENTIVE MAINTENANCE - MACHINE IN STORAGE.................................................................................................. 69
SERVICE TECHNICIAN SUGGESTED MAINTENANCE .......................................................................................................................... 69
RECOMMENDED SERVICE MATERIALS ................................................................................................................................................. 69
PM CHECKLIST ......................................................................................................................................................................................... 70
EXPANDED ELECTRICAL SYSTEM.................................................................................................................................................. 73 - 78
COMPONENT LOCATION - ADVENGER / BR 755, 855 ........................................................................................................................... 73
WIRING DIAGRAM – ADVENGER / BR 755, 855...................................................................................................................................... 74
ELECTRICAL SCHEMATIC – ADVENGER / BR 755, 855......................................................................................................................... 75
COMPONENT LOCATION - ST.................................................................................................................................................................. 76
WIRING DIAGRAM – ST............................................................................................................................................................................ 77
ELECTRICAL SCHEMATIC – ST ............................................................................................................................................................... 78

2- FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
INTRODUCTION - QUICK START SERVICE MANUAL PURPOSE
This manual is a technical resource that Nilfisk-Advance expects to be utilized while an Advenger / BR 755, 855 or ST is being serviced. It
contains information deemed necessary to provide basic troubleshooting, maintenance, and repairs within a timeframe of 2-3 hours maximum. If
your repair involves multiple visits to repair the same problem or the repair cannot be completed within 3 hours, a call to Nilfisk-Advance Technical
Support is needed, whether to alert the factory to potential issues or to provide the customer with an acceptable level of service. Refer to the
website www.advance-us.com for additional information not contained here-in, as well as updates or expanded instructions to procedures noted
here.
Note: Bold numbers in parentheses in the text indicate an illustrated item.
Note: All references to right, left, front and rear in this manual are as seen from the operator's position.
GENERAL MACHINE DESCRIPTION
The Advenger / BR 755, 855 and ST machines are commercial automatic floor scrubbers available with multiple deck sizes, multiple
corresponding squeegee blade sizes and materials, and variable scrub pressure and solution flow rates. Models equipped with AXP™ / EDS™
detergent systems default into the EverGreen™ cleaning mode (1:400 detergent ratio), a patented new Green cleaning technology designed to
reduce chemical use, environmental impact, and the cost of cleaning.
PARTS AND SERVICE
Repairs should be performed by an Authorized Nilfisk-Advance Service Center that employs factory-trained service personnel and maintains an
inventory of Nilfisk-Advance original replacement parts and accessories.
NAMEPLATE
The Model Number and Serial Number of the machine are shown on the Nameplate located on the chassis under the left rear corner as shown.
This information is required when ordering repair parts for the machine or contacting Nilfisk-Advance Technical Support.

FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855 - 3
CAUTIONS AND WARNINGS
SYMBOLS
Advance uses the symbols below to signal potentially dangerous conditions. Always 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
Specific Cautions and Warnings are included to warn you of potential danger of machine damage or bodily harm.
WARNING!
*This machine shall be used only 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, flame 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
flame. 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.
*Do not dispense flammable cleaning agents, operate the machine on or near these agents, or operate in areas where flammable
liquids exist.
*Do not clean this machine with a pressure washer.
*Only use the brushes provided with the appliance or those specified 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.
*Do not use scarifier discs and grinding stones. Advance will not be held responsible for any damage to floor surfaces caused by
scarifiers or grinding stones (can also cause damage to the brush drive system).
*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 first turning the key switch off (O), removing the key and applying the parking
brake.
*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, recovery or
detergent tanks or in the hose lines could freeze, causing damage to valves and fittings. Flush with windshield washer fluid.
*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.
SAVE THESE INSTRUCTIONS

4- FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
RELATED REFERENCE SOURCES
Nilfisk-Advance provides Operator Manuals, Sales literature, Parts Lists, Technical Service Bulletins, and Instruction Sheets on our website www.
advance-us.com for 24/7 availability of information to order parts, operate, troubleshoot, or repair all current production and most pruned machine
models.
For the Advenger and ST please refer to the following documents for additional information:
Parts List - Form Number 56042495
Operation Manual - Form Number 56041735 (English, Spanish)
For the BR 755, 855 please refer to the following documents for additional information:
Parts List - Form Number 56042496
Operation Manual - Form Number 56041738 (Danish, Norwegian, Swedish, Finnish)
Operation Manual - Form Number 56041739 (German, French, Nederlands, Russian)
Operation Manual - Form Number 56041740 (Spanish, Portuguese, Italian, Greek)
Operation Manual - Form Number 56041741 (Estonian, Latvian, Lithuanian, Slovenian)
Operation Manual - Form Number 56041742 (Slovakian, Czech, Polish, Hungarian)
Operation Manual - Form Number 56041743 (English, Turkish)
Curtis Programmer Manual 56043101
TSB US2008-984 Batteries and Chargers
TSB US2008-979 QuiQ Delta-Q Battery Charger Reprogramming Kit 56315732 Instructions
DIAGNOSTIC AND SERVICE TOOLS
In addition to a full set of metric and standard tools, the following items are required in order to successfully and quickly perform troubleshooting
and repair of Nilfisk-Advance commercial floor cleaning equipment.
1 Laptop computer loaded with current version of EZParts, Adobe Reader, and (preferably cellular) internet access
2 Digital voltmeter (DVM) with DC current clamp
3 Hydrometer
4 Battery load tester for checking 6V batteries
5 Bearing puller
6 Static control wrist strap
7 Set of torque wrenches
8 Hard (printed) copies of service manuals for all regularly serviced machines (available at www.advance-us.com and other Nilfisk-Advance
websites)
9 6” section of 1 1/2” PVC pipe with a 1” hole drilled into one side to check vacuum system against 1” lift spec
10 1 1/2” and 2 3/8” drill bit or hole cutter if a Dual Vac Kit is to be installed
Also these tools available from Nilfisk-Advance, Inc.:
56407502 Actuator Power Cord Adapter
56205281 Water Lift Gauge
56206921 Timer Bypass Kit (used to bypass timing function when troubleshooting shelf chargers)
56409441 Curtis Handheld Programmer
56409823 Curtis Adapter Cable (Quad Plug)
56315732 Delta-Q QuiQ Onboard Charger Interface Module
56422174 Tire Puller Kit for Drive Wheel Assembly

FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855 - 5
TECHNICAL SPECIFICATIONS
GENERAL
Machine Voltage 24 VDC
Dimensions (without Squeegee and
Scrub Deck)
Length (W/squeegee): 60 in (152.4 cm)
Width (body): 27.5 in (70 cm)
Height (Recovery tank): 51.7 in (131.3cm)
Scrub Deck and
Squeegee Widths
Scrub Deck Width: Squeegee Width:
30.3 in (77 cm) 28 disc 32.6 in (82.8 cm)
36.3 in (92.2 cm) 34 disc 41.4 in (105.2 cm)
31.6 in (80.3 cm) 28 cyl 32.6 in (82.8 cm)
Tank Capacities Solution Tank: 28 gal (106 l)
Recovery Tank: dynamic: 25 gal (95 l); static: 28 gal (106 l)
Gross Weight (standard machine w/o options; w/full solution tank, empty recovery tank and
heaviest batteries installed) 1451 lbs (658 kg)
Net Weight (standard machine w/o options, batteries or removable brushes; w/empty solution and
recovery tanks) 536 lbs (244 kg)
Static Wheel Loading Front: 615 lbs (279 kg) Rear: 836 lbs (379 kg)
Static Wheel Pressure Front: 174.7 psi (12.3 kg/cm2) Rear: 124.7 psi (8.8 kg/cm2)
Ingress Protection Code IPX3
Sound Pressure Level
(IEC 60704-1) 63.7 dB(A)
Vibrations at the Hand Controls (ISO 5349-1) .26 m/s2
Vibrations at the Seat (EN 1032) .05 m/s2
Gradeability Transport: 16 % / 9 degrees
Cleaning: 9 % / 5 degrees
Battery Compartment Dimensions
Maximum Battery Compartment
25" L X 15.5" W X 21" H
Without the Box:
26.25" X 16" X 21"
FIGURE 1
Advance Models Nilfisk Models

6- FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
TECHNICAL SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
Batteries
Number of Batteries 4 / Battery Voltage 6V 310 Ah wet
Number of Batteries 4 / Battery Voltage 6V 420 Ah wet
Number of Batteries 4 / Battery Voltage 6V 312 Ah AGM
Standard Battery Capacity: 305 amp-hours @ 20-hour rate
Onboard Battery Charger 24-volt Manufacturer: Delta Q Model: 912-2400-N1
Output 25A Gel Compatible: Yes
DRIVE SYSTEM
Drive Wheel Diameter: 9.84 in (25 cm) / Width: 3.15 in (80 cm)
Type/Material: Blue Urethane
Drive Motor 1.05 HP (780 watts)
Max. Transport Speed Fwd: 3.91 mph (6.30 km/h)
Rev: 2.61 mph (4.20 km/h)
SOLUTION SYSTEM
Solution Control Pulse-control Solenoid Valve
Advenger
BR 755, 855
Solution
Flow Rates
(1) Regular Scrub .38 gal/min (1.44 L/min) or 70 minutes per solution tank
(2) Heavy Scrub .62 gal/min (2.35 L/min) or 40 minutes per solution tank
(3) Extreme Scrub .92 gal/min (3.48 L/min) or 23 minutes per solution tank
ST Solution
Flow Rates
(Average)
(1) Regular Scrub .30 gal/min (1.13 L/min) or 60 minutes per solution tank
(2) Heavy Scrub .48 gal/min (1.82 L/min) or 45 minutes per solution tank
(3) Extreme Scrub .88 gal/min (3.33 L/min) or 30 minutes per solution tank
AXP™ / EDS™ System Available Advenger / BR 755, 855 only
Detergent Ratios Available
400:1 = .25% 200:1 = .5% 100:1 = 1% 32:1 = 3%
300:1 = .3% 150:1 = .66% 64:1 = 1.5%
256:1 = .4% 128:1 = .8% 50:1 = 2%
Recycle System Available No
RECOVERY SYSTEM
Vacuum Motor(s) .75 HP (560-watt) 3-stage
Vacuum Water
Lift (measured at
recovery hose)
One Motor Sealed: 63.0 in of Water (15.7 kPa)
1” Open-hole Aperture: 10.3 in of Water (2.6 kPa)
Two Motors Sealed: 65.0 in of Water (16.2 kPa)
1” Open-hole Aperture: 18.5 in of Water (4.6 kPa)

FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855 - 7
TECHNICAL SPECIFICATIONS
SCRUB SYSTEM
Scrub Deck Types Disc and Cylindrical
Scrub Brush/Pad Sizes
and Types
Disc: (2) 14 in (35.6 cm) Scrub Path: 28 in (71.1 cm)
Disc: (2) 17 in (43.2 cm) Scrub Path: 34 in (86.4 cm)
Cylindrical: (2) 27 in (68.6 cm) Scrub Path: 28 in (71.1 cm)
Scrub Motors - Disc
Number of Motors 2
Right-hand/Single Motor: .64 HP (480 watts)
Left-hand Motor: .64 HP (480 watts)
Scrub Head Speeds - Disc Right-hand/Single Motor: 215-260 RPM
Left-hand Motor: 215-260 RPM
Scrub Motors – Cylindrical Right-hand Motor: .5 HP (373 watts)
Left-hand Motor: .5 HP (373 watts)
Scrub Head Speeds – Cylindrical Right-hand Motor: 900 RPM / Left-hand Motor: 900 RPM
Scrub Force 28” ST
(1) Regular Scrub: 75-85 lbs (32.7-37.0 kg)
(2) Extreme Scrub (factory setting): 170-180 lbs (77.1-81.6 kg)
Scrub Force 34” ST
(1) Regular Scrub: 95-105 lbs (41.4-45.7 kg)
(2) Extreme Scrub (factory setting): 195-205 lbs (88.5-93.0kg)
Scrub Force Advenger / BR 755, 855 - Disc
(1) Regular Scrub: 70-90 lbs ( 31.8-39.2kg)
(2) Heavy Scrub: 120-150 lbs (52.3-65.3kg)
(3) Extreme Scrub: 180-220 lbs (78.4-95.8 kg)
Scrub Force Advenger / BR 755, 855 -
Cylindrical
(1) Regular Scrub: 45-60 lbs (20.4-27.2 kg)
(2) Heavy Scrub: 70-80 lbs (31.8–36.3 kg)
(3) Extreme Scrub: 90-100 lbs (40.8-45.4 kg)
MINIMUM AISLE TURN AROUND RADIUS (TURNING LEFT)
28” deck Advenger / BR 755, 855
and ST 63 inches (1.63 m)
34” deck Advenger / BR 755, 855
and ST 67.5 inches (1.71 m)
Cylindrical Advenger / BR 755, 855 63 inches (1.63 m)
MINIMUM DOOR PASS-THRU WIDTH (SIDE SKIRTS ON, SQUEEGEE OFF)
28” deck Advenger / BR 755, 855
and ST 31 inches (.79 m)
34” deck Advenger / BR 755, 855
and ST 36.5 inches (.93 m)
Cylindrical Advenger / BR 755, 855 32 inches (.81 m)

8- FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
TRANSPORTING THE MACHINE
CAUTION!
Before transporting the machine on an open truck or trailer:
1 Remove the Squeegee Assembly (11) and secure.
2 Tie the machine down securely at the Locations (A) shown in FIGURE 2.
3 Tape and strap all access doors and covers as necessary.
4 In temperatures below freezing, remove all water from the machine and flush with windshield washer fluid to prevent damage to valves and
fittings.
5 Do not drive machine onto a ramp grade exceeding 16% (9 degrees) or damage to the machine may occur.
TIE-DOWN POINTS
TOWING THE MACHINE
CAUTION!
The Drive Wheel (4) has a built in electromagnetic brake that is engaged whenever the Key Switch is Off or the Drive Pedal (3) is in the Neutral
position, i.e. there is no power to the Speed Control. This brake can be manually over ridden if necessary by inserting a medium to large
screwdriver behind the Yoke (A) as shown in FIGURE 3. (A rubber door stop can also be used). This should only be done in the event you need
to push or pull the machine.
Tow the machine for short distances only.
FIGURE 2
FIGURE 3

FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855 - 9
JACKING POINTS
Front - When facing the front of the machine and underneath looking
up, place the jack to the left of the chain on the frame member (A) as
shown in FIGURE 4.
FIGURE 4
EMERGENCY STOP KNOB
WARNING!
The Emergency Stop Knob (7) disconnects power from the Speed Control and Drive Wheel.
It does not disconnect the batteries, but will continue to power the control board . Do not use the Emergency
Stop Knob as a substitute for disconnecting the red Anderson battery connector inside the battery compartment.
FIGURE 5
Rear – Remove Squeegee Assembly (11) to access these locations. Use a
bottle jack at these points (B) as shown in FIGURE 5.
FIGURE 6

10 - FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
KNOW YOUR MACHINE
MACHINE FRONT RH VIEW
1 Operator’s Seat
2 Solution Tank Drain Hose
3 Drive Pedal, Directional/Speed
4 Drive Wheel
5 Drive Wheel Circuit Breaker (70 Amp)
6 Control Circuit Circuit Breaker (10 Amp)
7 Emergency Stop
8 Scrub Deck
9 Rear Wheel
10 Battery Compartment (under seat)
11 Squeegee Assembly
12 Detergent Cartridge Access Cover (AXP/EDS models only)
13 Detergent Cartridge (AXP/EDS models only)
14 Scrub Deck Raise/Lower Lever (ST models only)
15 Deck Skirt Removal Knobs
16 Battery Charger Access Door
17 Battery Charger (optional)
18 Seat Adjustment Knob (optional on ST models)
19 Deck Skirt Height Adjustment Knob
20 Front Roller Bumper

FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855 - 11
KNOW YOUR MACHINE
MACHINE REAR LH VIEW
21 Solution Shutoff Valve
22 Squeegee Raise/Lower Lever (ST models only)
23 Steering Wheel Tilt Adjust Knob
24 Control Panel
25 Solution Tank Fill Cover
26 Recovery Tank Cover
27 Vacuum Motor Filter Housing
28 Strainer Basket (optional on ST models)
29 Recovery Tank Shutoff Float
30 Squeegee Storage Hook
31 Recovery Tank Drain Hose
32 Squeegee Tilt Adjustment Knob
33 Seat Prop-Rod
34 Machine Battery Connector
35 Rear Squeegee Blade Removal Latch
36 Hopper (Cylindrical models only)
37 Recovery Hose
38 Solution Solenoid Valve
39 Front Squeegee Blade Removal Thumb Nut
40 Solution Filter

12 - FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
!
!
F
F7
F8
A
C
B
C1
D
J
E
G
H
H1
I
K
L
FF1 F2 F3
F4 F5 F6
KNOW YOUR MACHINE
CONTROL PANEL (ADVENGER / BR 755, 855 MODELS)
A Key Switch
B Solution Increase Switch
C Solution ON/OFF Switch
C1 Solution Flow Indicators (Normal, Heavy & Extreme)
D Solution Decrease Switch
E AXP/EDS ON/OFF Switch
F Display
F1 Hour Meter
F2 Solution Tank Level Indicator
F3 Fault Codes
F4 AXP/EDS Indicator (if so equipped)
F5 Detergent Ratio Indicator
F6 Battery Indicator
F7 Recovery Tank FULL Indicator
F8 Battery Low Indicator
G Scrub Pressure Increase Switch
H Scrub ON/OFF Switch
H1 Scrub Pressure Indicators (Normal, Heavy and Extreme)
I Scrub Pressure Decrease Switch
J EverGreen Switch
K Horn Switch
L Vacuum/Wand Switch
NOTE 1: The display will go into Sleep Mode to save power if the
machine is turned on, in Neutral pedal, and idle for more than 10
minutes. Closing the seat switch, moving the drive pedal, or pressing
a control panel button will refresh the LCD display and LEDs.
NOTE 2: Recovery Tank FULL (F7) status allows machine
transport but disables all active systems and disables the control
panel switches except for the Horn Switch (K). To reset, empty the
tank and cycle the key switch.
NOTE 3: Battery Low (Low Voltage Cutout) Indicator (F8) triggers
at 20.55V on the wet setting and at 21.75V on the gel setting.
Refer to “Changing Program Settings - Advenger / BR 755, 855” to
change battery type programming.

FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855 - 13
N
B
C
C1
D
A
K
M
KNOW YOUR MACHINE
CONTROL PANEL (ST MODELS)
A Key Switch
B Solution Increase Switch
C Solution ON/OFF Switch
C1 Solution Flow Indicators (Normal, Heavy & Extreme)
D Solution Decrease Switch
K Horn
M Battery Indicator
N Fault Indicator
NOTE 1: Recovery Tank FULL status is indicated by the Solution Flow
Indicator LED (C1) turning Off. This status allows machine transport but
disables all active systems and disables the control panel switches except
for the Horn Switch (K). To reset, empty the tank and cycle the key switch.
NOTE 2: Battery Low (Low Voltage Cutout) status is indicated by the
red battery LED (M) flashing. It triggers at 20.55V on the wet setting and
21.75V on the gel setting. Refer to “Changing Program Settings - ST” to
change battery type programming.

14 - FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
KNOW YOUR MACHINE
As you read this manual, you will occasionally run across a bold number in parentheses – example: (2). A bold number refers to an item shown
on the Know Your Machine pages unless otherwise noted (bold letters refer to items on the same page). Refer back to the Know Your Machine
pages whenever necessary to pinpoint the location of an item mentioned in the text.
BASIC MACHINE OPERATION
(refer to Operator Manuals such as 56041735 / 56041743 (English) for detailed information regarding how to operate the machine):
1 Turn on the key to turn on the graphical display showing battery condition, hour meter, solution tank level and AXP/EDS dilution ratio if so
equipped.
ADVENGER / BR 755, 855: Pressing the red SCRUB ON / OFF button once will enable regular scrub mode. The deck and rear squeegee
will be lowered to the floor.
ST: Manually lower the scrub deck and squeegee using levers (14) and (22).
2 Depress the foot pedal forward to begin scrubbing. The brushes, water and vacuum will turn on.
3 When the machine stops the brushes and water will stop. The vacuum will continue to run for 10 seconds and then stop.
4 At any time the scrub mode can be changed to regular, heavy or extreme scrub by using the SCRUB + or SCRUB - button.
5 At any time the solution flow rate can be changed by using the SOLUTION + or SOLUTION - button.
6 If the scrub mode and solution flow rate are at different positions they can be reset or aligned using two methods.
A Use the SOLUTION + or SOLUTION - buttons to change the solution flow rate to match the scrub mode setting.
B Change the scrub mode using the SCRUB + or SCRUB - buttons. The scrub pressure and solution flow will automatically be aligned for
optimized results.
7 To stop all scrubbing functions and transport the machine, (ADVENGER / BR 755, 855) press the red SCRUB ON / OFF button or [(ST)
return the scrub deck and squeegee control levers to the up position]. The solution and brushes will stop, [(ADVENGER / BR 755, 855) the
deck and squeegee will raise], and the vacuum will shut off after a 10 second delay.

FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855 - 15
MAIN CONTROLLER ERROR CODES – ADVENGER / BR 755, 855 AND ST
Advenger /
BR 755, 855
Display Error
Code
ST Service
LED Blink
Code *
Fault Description System
Affected Refer to page:
3 1,1 Speed control fault Wheel Drive 52
4 NA Scrub deck lift actuator overload Scrub 32
5 1, 2 Brush motor overload Scrub 31
6 NA Squeegee lift actuator overload Squeegee 21
7 1, 3 Vacuum motor overload Recovery 42
8 1, 4 Solution solenoid overload Solution 47
9 2, 1 Vacuum contactor coil overload Recovery 42
10 2, 2 Brush motor contactor coil overload Scrub 31
11 NA Chemical pump overload AXP/EDS 47
30 2, 3* Solution solenoid open Solution 47
31 2, 4 Brush motor circuit open Scrub 31
32 NA Scrub deck lift actuator open Scrub 32
33 3, 1 Vacuum motor circuit open Recovery 42
34 NA Squeegee lift actuator open Squeegee 21
35 3, 2 Brush motor contactor coil open Scrub 31
36 3, 3 Vacuum motor contactor coil open Recovery 42
37 NA Chemical pump open AXP/EDS 47
60 3, 4 Brush motor circuit contacts stuck closed Scrub 31
61 4, 1 Vacuum motor circuit contacts stuck closed Recovery 42
62 4, 2 Solution solenoid control fault Probable board failure
63 4, 3 Brush contactor coil control fault Probable board failure
64 4, 4 Vacuum contactor coil control fault Probable board failure
* ST open circuit errors are only visible in Fault Recall Mode, accessible via the Hidden Menu. Refer to “Changing Program Settings - ST” section.
Then verify fault by entering Service Test Mode.

16 - FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
SPEED CONTROL ERROR FLASH CODES
STATUS LED FAULT CODES (TABLE 1)
LED STATUS LIGHT EXPLANATION POSSIBLE CAUSE
CODE DISPLAY
1,1 O O over-/under-temperature cutback 1. Temperature >97°C (206°F) or < -25°C (-13°F).
2. Excessive load on vehicle.
3. Operation in extreme environments.
4. Electromagnetic, foot or parking brake not
releasing properly.
1,2 O OO throttle fault 1. Throttle input wire open or shorted.
2. Throttle pot defective.
3. Wrong throttle type selected.
1,3 O OOO speed limit pot fault 1. Speed limit pot wire(s) broken or shorted.
2. Broken speed limit pot.
1,4 O OOOO battery voltage too low 1. Battery voltage <17 volts.
2. Bad connection at battery or controller.
1,5 O OOOOO battery voltage too high 1. Battery voltage >36 volts.
2. Vehicle operating with charger attached.
3. Intermittent battery connection.
2,1 OO O main contactor driver Off fault 1. Main contactor driver failed open.
2,3 OO OOO main contactor fault 1. Main contactor welded or stuck open.
2. Main contactor driver fault.
3. Brake coil resistance too high.
2,4 OO OOOO main contactor driver On fault 1. Main contactor driver failed closed.
3,1 OOO O HPD fault present for >10 sec. 1. Misadjusted throttle.
2. Broken throttle pot or throttle mechanism.
3,2 OOO OO brake On fault 1. Electromagnetic brake driver shorted.
2. Electromagnetic brake coil open.
3,3 OOO OOO precharge fault 1. Controller failure.
2. Low battery voltage.
3,4 OOO OOOO brake Off fault 1. Electromagnetic brake driver open.
2. Electromagnetic brake coil shorted.
3,5 OOO OOOOO HPD (High Pedal Disable) fault 1. Improper sequence of throttle and KSI*,
push, or inhibit inputs.
2. Misadjusted throttle pot
4,1 OOOO O current sense fault 1. Short in motor or in motor wiring.
2. Controller failure.
4,2 OOOO OO motor voltage fault (hardware 1. Motor voltage does not correspond to
failsafe) throttle request.
2. Short in motor or in motor wiring.
3. Controller failure.
4,3 OOOO OOO EEPROM fault 1. EEPROM failure or fault.
4,4 OOOO OOOO power section fault 1. EEPROM failure or fault.
2. Short in motor or in motor wiring.
3. Controller failure.
*NOTE: A KSI (key switch input) system problem is a specific HPD (high pedal disable) type operational fault, caused by the operator activating
the Fwd/Rev drive pedal before turning on the main key switch or activating the throttle before sitting on the seat. This can be cleared by returning
the operator’s drive pedal to neutral and cycling the key switch OFF and ON.

FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855 - 17
ERROR CODE SYSTEM DIAGNOSTICS – ADVENGER / BR 755, 855 AND ST
The following table describes the systems that are disabled for each error code to assist you in understanding machine response to error code
status.
Disable System Flash Indicator
Display Code Fault Description Disable Chemical Disable Solution Disable Brush Motors Disable Recovery Brush Deck Lift Disable Chemical Indicator Solution Indicator Brush Motor Indicator Vacuum Indicator
3 Speed control fault x x x
4 Brush deck lift actuator overload x
5 Brush motor overload x x x X x
6 Squeegee lift actuator overload x x
7 Vacuum motor overload x x x x
8 Solution solenoid overload x x x
9 Vacuum contactor coil overload x x x x
10 Brush contactor coil overload x x x X x
11 Chemical Pump overload x x
30 Solution solenoid open x x x
31 Brush motor open x x x x
32 Brush deck lift actuator open x
33 Vacuum motor open x x x x
34 Squeegee lift actuator open x x
35 Brush contactor coil open x x x x
36 Vacuum contactor coil open x x x x
37 Chemical pump open x x
60 Brush motor circuit contacts stuck closed
61 Vacuum motor circuit contacts stuck closed
62 Solution solenoid coil control fault
63 Brush contactor coil control fault
64 Vacuum contactor coil control fault

18 - FORM NO. 56043121 - Advenger / 2800ST, 3400ST / BR 755, BR 855
UNDERSTANDING CONTROL OF SQUEEGEE, SCRUB, AND RECOVERY SYSTEMS VIA MODES
Due to the unique One-Touch functions of the new Advenger / BR 755, 855 and ST, multiple systems are engaged via one action defined by the Mode that is chosen - Scrub Mode,
Vacuum Mode, or Wand Mode. The following tables outline the various components of the systems that are controlled in tandem by pressing a particular button or engaging the Drive
Pedal in Forward, Neutral, or Reverse under normal machine operation. To bypass these systems, refer to the “Service Test Mode” section.
Advenger / BR 755, 855
Mode Operator
Position
Seat Switch
Status Action Result
Scrub Mode Seated Closed Press Scrub On
Squeegee lowers (24V to M3 for 4 seconds - adjustable.)
Scrub deck lowers (24V to M4 for 3 sec., then pulsed signal)
Press Foot Pedal
Forward
Vacuum motor circuit On
Scrub motor circuit On
Solution Solenoid On
Chemical Pump On if equipped
Press Foot Pedal
Reverse
Solution Solenoid Off
Chemical Pump Off if equipped
Squeegee raises (reverse 24V to M3 for 4 seconds)
Pulsed voltage to M4 deck actuator maintaining down position
Brush motor circuit On
Vacuum motor circuit off after 10 seconds continuous in reverse
Foot Pedal in Neutral
Brush motor circuit Off but Enabled
Vacuum motor circuit Off after 10 sec. but Enabled
Pulsed voltage to M4 deck actuator maintaining down position
Squeegee in down position
Press Scrub Off
Brush motor circuit Off
Scrub deck raises (reverse 24V to M4 for 3 sec.)
Squeegee raises after 10 sec. (reverse 24V to M3 for 4 seconds)
Vacuum motor circuit On for 20 seconds total
Solution Solenoid Off
Chemical Pump Off if equipped
Press Scrub Off Foot Pedal in
Neutral >10 sec.
Brush motor circuit Off
Scrub deck raises (reverse 24V to M4 for 3 sec.)
Squeegee raises (reverse 24V to M3 for 4 seconds)
Vacuum motor circuit Off
Solution Solenoid Off
Chemical Pump Off if equipped
Vac Mode Seated Closed Press Vac/Wand On Squeegee lowers (24V to M3 for 4 seconds)
Press Foot Pedal
Forward Vacuum motor circuit On
Press Foot Pedal
Reverse
Squeegee raises until Foot Pedal in Neutral or Forward again (reverse
24V to M3 for 4 sec.)
Vacuum motor circuit On for 10 seconds
Press Vac/Wand Off
Squeegee raises after 10 sec (reverse 24V to M3 for 4 seconds) *
Vacuum motor circuit On for 20 seconds total *
* If drive pedal in Neutral >10 sec, squeegee will raise and vac motor
circuit will be Off immediately with no delay.
Press Vac/Wand Off Twice Squeegee raises immediately (reverse 24V to M3 for 4 seconds)
Vacuum motor circuit Off immediately
Wand Mode* Standing Open Press Vac/Wand On Squeegee lowers (24V to M3 for 4 seconds)
Vacuum motor circuit On
* Recovery Tank Full is disabled in Wand Mode Press Vac/Wand Off Squeegee raises (reverse 24V to M3 for 4 sec.)
Vacuum motor circuit Off