Nilfisk-Advance Liberty SC50 X20D User manual

WARNING:
The operation of this machine is strictly reserved to trained and qualied operators.
Nilfisk Liberty SC50
Instructions for Use Instructions for Use
Original Instructions
Instrucciones de uso
2/2019 revised 6/2020 REV D
Form no. 56091204
A-English
B-Español
ADVERTENCIA:
El funcionamiento de esta máquina está estrictamente reservado a los operadores capacitados y calicados.
Model No:
56104502 (X20D), 56104506 (X20D), 56104508 (X20D)
56104503 (X20R), 56104507 (X20R), 56104509 (X20R)
MMC Firmware 4.1 or above

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INTRODUCTION
This manual will help you get the most from your Nilsk Scrubber. Read it thoroughly before operating the machine.
Note: Bold numbers in parentheses indicate an item illustrated on pages A-10 – A-14.
This machine is only suitable for commercial use, for example in hotels, schools, hospitals, factories, shops, ofces and rental businesses. The
Nilsk Liberty SC50 is a battery powered oor cleaning machine.
WARNING:
The operation of this machine is strictly reserved to trained and qualied operators.
TABLE OF CONTENTS
Introduction................................................................................. 2
Parts and Service ......................................................................3
Modications ............................................................................. 3
Name Plate ................................................................................3
Uncrate the Machine ................................................................. 3
Transporting the Machine ..........................................................3
Cautions and Warnings.............................................................. 4
Regulatory................................................................................... 9
Know Your Machine..................................................................10
Control Panel ...........................................................................12
Information Menu Display ........................................................ 15
Autonomous Help Screen ....................................................... 19
Understanding Autonomy ........................................................20
Prepare the Machine for Use...................................................21
Batteries .................................................................................. 21
Install the Batteries .................................................................. 21
Location Tag ............................................................................22
Location Tag Position .............................................................. 23
Magnetic Smartkey™ .............................................................. 25
Install the Brush (Disc System) ............................................... 26
Install the Pad (REV System) .................................................. 27
Install the Squeegee ................................................................28
Fill the Solution Tank ............................................................... 29
Solution Tank Indicator ............................................................29
Detergent System Preparation (Ecoex) ................................. 30
Detergent System Purge .........................................................31
Detergent System Use (Ecoex) ............................................. 32
Operating the Machine.............................................................34
Starting the Machine ............................................................... 34
Stopping the Machine ..............................................................36
Recording Plans for Autonomous Mode ..................................37
Recording CopyCat™ Plans ................................................ 38
Recording Fill-In Plans ......................................................... 40
Playback of Recorded Plan, Autonomous Mode ..................... 45
LED Status Bar Operation ....................................................... 48
Speaker Operation .................................................................. 49
Operating the Machine Manual Mode ..................................... 50
After Use ................................................................................. 52
Maintenance.............................................................................. 53
Maintenance Schedule ............................................................ 53
Cleaning Recovery Tank ......................................................... 53
Cleaning Solution Filter ........................................................... 54
Clean Sensor Lenses ..............................................................54
Lubricating the Machine .......................................................... 55
Electromagnetic Brake ............................................................ 55
Charging GEL/AGM (VRLA) Batteries ....................................56
Squeegee Maintenance .......................................................... 58
Squeegee Adjustment ............................................................. 58
Troubleshooting ....................................................................... 59
General Machine Troubleshooting ..........................................59
Autonomous Mode Troubleshooting ........................................ 60
Fault Code Display ..................................................................61
Fault Code History ................................................................... 62
Specications ...........................................................................63
Accessories / Options .............................................................. 63
Material Composition and Recyclability ................................... 63
Solution Flow Rates ................................................................ 63
Technical Specications .......................................................... 64
Glossary....................................................................................65

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PARTS AND SERVICE
Repairs, when required, should be performed by Nilsk A/S, who employs factory trained service personnel, and maintains an inventory of Nilsk
original replacement parts and accessories.
Call NILFISK A/S for repair parts or service. Please specify the Model and Serial Number when discussing your machine.
MODIFICATIONS
Modications and additions to the cleaning machine which affect capacity and safe operation shall not be performed by the customer or user
without prior written approval from Nilsk A/S. Unapproved modications will void the machine warranty and make the customer liable for any
resulting accidents.
NAME PLATE
The Model Number (also known as Part Number) and Serial Number of your machine are shown on the Nameplate, located on the inside of the
battery compartment.
Date of Manufacture “Date Code” is marked on the nameplate. Date Code: A18, means January 2018.
This information is needed when ordering repair parts for the machine. Use the space below to note the Model Number and Serial Number of your
machine for future reference.
MODEL NO. ___________________________________________________________
SERIAL NO. ___________________________________________________________
UNCRATE THE MACHINE
When the machine is delivered, carefully inspect the shipping packaging and the machine for damage. If damage is evident, save the shipping
carton (if applicable) so that it can be inspected. Contact the Nilsk Customer Service Department immediately to le a freight damage claim.
Refer to the unpacking instruction sheet included with the machine to remove the machine from the pallet.
TRANSPORTING THE MACHINE
CAUTION!
Before transporting the machine on an open truck or trailer, make sure that . . .
• All tanks are empty.
• Recovery tank cover is latched securely.
• The machine is tied down securely - see Tie Down Locations (6) in Know Your Machine. Only use locations designated as “Tie Down
Locations” to secure the machine during transport. Using any other location of the machine to tie down the machine may cause damage or
injury.
• The machine’s electromagnetic brake is engaged (not manually overridden), see Electromagnetic Brake section if necessary.

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CAUTIONS AND WARNINGS
SYMBOLS
Nilsk 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
Specic Cautions and Warnings are included to warn you of potential danger of machine damage or bodily harm.
This machine is for commercial use, for example in hotels, schools, hospitals, factories, shops and ofces other than
normal residential housekeeping purposes.
WARNING!
• This machine shall be used only by properly trained and authorized persons.
• The operation of this machine is strictly reserved to trained and qualied operators.
• This machine is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge.
• While on ramps or inclines, avoid sudden stops. Avoid abrupt sharp turns. Use low speed down ramps.
• Observe the Gross Vehicle Weight, GVW, of the machine when loading, driving, lifting or supporting the machine.
• 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 machine power OFF 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 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.
• Only use the brushes or pads provided with the appliance or those specied in the instruction manual. The use of
other brushes or pads may impair safety.
• Do not look at the laser beams used by the machine. Permanent eye damage could result. Lasers are eye-safe if
viewed briey, such as to determine that they are functioning. Do not look directly into lasers or stare at them without
wearing protective laser safety glasses.
• The vehicle protection zone is no more than 200mm from the oor
• Do not operate the machine close to overhanging objects such as racking, ladders, wall hung re extinguishers, tables
and similar objects.

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CAUTIONS AND WARNINGS - CONTINUED
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 scarier discs and grinding stones. Use only pads or brushes intended for oor cleaning. Nilsk will not
be held responsible for any damage to oor surfaces caused by using the wrong or improper pads or brushes.
• 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 service task.
• After use power the machine off at the power switch, do not leave the machine unattended where it can be accessed
by others.
• Power the machine OFF at the power switch and remove the magnetic SmartKey, 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.
• When working on the Liberty SC50 and a battery disconnect is needed, ensure that the Autonomy Module is
completely powered off before the power is pulled from the system. To verify that the Autonomy module is completely
powered down simply wait for both the safety LiDAR’s and Dropoff lasers to power off, plus an additional 15 seconds
after that. If this procedure is not followed when disconnecting the battery there is a chance that the Autonomy Module
could be permanently damaged, and would need replacement.
• 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, pumps and ttings. Flush with low-
temperature 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.
• This machine should only be used and stored indoors.
• Do not spray this machine with pressurized water.
• The machine’s magnetic SmartKey has a built-in magnet. Do not place objects having magnetic bands (such as
credit cards, electronic keys, phone cards) near the key. The built-in magnet can damage or erase the data stored on
the magnetic bands.
• Only use locations designated as “Tie Down Locations” to secure the machine during transport. Using any other
location of the machine to tie down the machine may cause damage or injury.
• Do not operate the machine in an environment exceeding 104°F (40°C).
• Do not operate the machine without the Bumper (18) in place.
• Avoid driving the machine onto stairways or escalators, into open elevator shafts, or into any area where there is a
signicant drop in elevation. Serious machine damage may result if it falls down stairs, escalators, or open shafts.
The machine cannot climb stairs. Machine is designed for use only on at surfaces (less than 2 degree incline). Place
garbage can or similar object in front of escalators while recording plan to prevent machine entry.
• Do not operate the machine on a grade outside that which is written on the nameplate.
• While driving the machine manually, to develop navigational maps as part of recording the autonomous plans, it is
the Operator’s responsibility to avoid contact with obstacles and individuals. The machine will not avoid them in the
manual operating mode. There are no autonomous safety functions operating in the manual mode.
• Do not operate the machine on wet oors.
• Do not operate the machine near other autonomous vehicles.
• Ensure daily and periodic safety checks are completed.

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CAUTIONS AND WARNINGS - CONTINUED
CAUTIONS AND WARNINGS SPECIFIC TO DROP-OFF SENSOR (16)
This product uses a semiconductor laser as its light source.
DANGER!
• This product is only intended to detect object(s). Do not use this product for the purpose to protect a human body or
part of a human body.
• This product is not intended for use as an explosion-proof product. Do not use this product in a hazardous location
and/or potentially explosive atmosphere.
WARNING!
• This product uses DC power. The product may explode or burn if an AC voltage is applied.
• Use of controls or adjustments or performance of procedures other than those specied herein may result in
hazardous radiation exposure.
• Follow the instructions mentioned in this manual. Otherwise, injury to the human body (eyes and skin) may result.
• Laser emission from this product is not automatically stopped when it is disassembled. Do not disassemble this
product.
• Precautions on Class 1 Laser Product
- Do not stare into the direct or specularly reected beam.
CAUTION!
• Do not wire the cable along with power lines or high-tension lines, as the sensor may malfunction or be damaged due
to noise.
• When using a commercially available switching regulator, ground the frame ground terminal and ground terminal.
• Do not use this product outdoors or in a location in which its light-receiving surface will come in direct contact with
stray ambient light.

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CAUTIONS AND WARNINGS - CONTINUED
CAUTIONS AND WARNINGS SPECIFIC TO 2D MAPPING SENSOR (14)
WARNING!
Risk Of Potential Equalization Currents
The 2D mapping sensor is designed to be operated in a system with professional grounding of all connected devices and
mounting surfaces to the same ground potential. If this condition is not met, potential equalization currents may through
along the cable shields, causing the following hazards:
• Dangerous contact voltage on the metal housing
• Malfunction or destruction of the TiM
• Heating of the cables with possible spontaneous combustion.
CAUTION!
CLASS 1 LASER PRODUCT
The 2D Mapping Sensor corresponds to laser class 1 (eye-safe).
The laser beam is not visible to the human eye.
• The use of controls, or adjustments or performance of procedures other than those specied herein may result in
hazardous radiation exposure.
• Do not open the housing (opening the housing will not switch off the laser).
• Pay attention to the laser safety regulations as per IEC 60825‑1 (latest version).

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CAUTIONS AND WARNINGS - CONTINUED
CAUTION!
CAUTIONS SPECIFIC TO SAFETY SENSOR (17)
Read the following guidelines for correct use of the Safety Sensor (17). Proper handling and usage will ensure the safety
sensor to operate accordingly.
GENERAL PRECAUTIONS
• Safety sensor is designed to protect human begins or systems by monitoring the hazardous area. It is not designed
for the protection from high speed objects or the electromagnetic radiation.
• Perform pre operation tests in order to verify the performance of safety sensor.
• Do not modify or disassemble safety sensor. Such modications will affect the detection capability leading to injuries
or death.
• Do not modify or disassemble safety sensor to maintain its housing rating. Such modications will void the warranty.
• The person in charge should be qualied to operate safety sensor. The person must be trained, on safety
requirements with necessary cautions for handling the device.
• The person in charge should train the user with correct installation, operation, inspection and maintenance
procedures.
• The person in charge is responsible to ensure the proper working environment for safety sensor.
• The person in charge is responsible for the compliance with the local safety requirements, standards, rules and
regulations, laws of respective nations, states or districts when safety sensor is used in a safety related system.
• Safety sensor has been manufactured and shipped under the strict quality control. If you nd any defect in the product
contact the nearest distributor or sales representative.
• Manufacturer cannot be held responsible for the damages or failure due to misuse of the product.
• User should prepare test pieces for detection capability verication. The test piece should emulate the smallest object
that is intended to be detected during the operation.
• Maximum level of homogeneous pollution for safety sensor to operate normally is under 30%. Safety sensor will
report error if the pollution exceeds the stated limit. Always keep the optical window in clean condition to avoid the
error.
• Before resetting the interlock of safety sensor, user must ensure the surrounding is safe especially the protected area.
• Apply sufcient measures to ensure safety of the protected area when decommissioning safety sensor. Protective
materials such as guards or light curtain should be used to prevent the passage to the hazardous area.
• Safety sensor including its accessories are subject to change without prior notice for the improvement.
• Safety sensor should be disposed as industrial waste or in accordance with the local disposal directives.
SAVE THESE INSTRUCTIONS

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REGULATORY
This product contains radio equipment operating in the frequency bands and with max TX power as indicated below:
Frequency range [MHz] Max TX pwr [dBm]
880-915
1710-1785
33
30
1920-1980
880-915 24
1920-1980
1710-1785
2500-2570
880-915
832-862
2570-2620
2300-2400
23
2400-2483,5 20
5150-5350
5470-5725
23
30
This product contains the chemical DOTE (2-ethyihexyl 10-ethyl-4,4-dioctyl-7-oxo-8-oxa-3,5-dithia-4-stannatetradecanoate; CAS
number: 15571-58-1) which is listed on the candidate list of the EU REACH Regulation (1907/2006/EC).

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KNOW YOUR MACHINE
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 these pages unless otherwise noted. Refer back to these pages whenever necessary to pinpoint the location of an item mentioned in the
text. NOTE: Refer to the service manual for detailed explanations of each item illustrated on the next 4 pages.
1 Control Panel
2 Steering Wheel
3 Detergent Cartridge
4 LED Status Bar
5 Solution Tank
6 Tie Down Locations (3)
7 Drive Wheel
8 Solution Drain Valve
9 Scrub Deck
1
2
3
4
5
6
7
9
10
11
6
12
8
17
14
16
16
15
17
18
10 Squeegee Roller Wheels (2)
11 Squeegee Assembly
12 Squeegee Cover Knobs (4)
14 2D Mapping Sensor
15 3-D Vision Sensor Lenses
16 Drop-Off Sensor (4)
17 Safety Sensor (2)
18 Bumper (NOT a lifting or tie down point)

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KNOW YOUR MACHINE
20 Control Panel Housing / Recovery Tank Cover
21 Recovery Tank Full Float
22 Recovery Tank
23 Debris Catch Tray
24 Go Pedal
25 Operator Presence Pedal
26 Platform
27 Recovery Tank Lift Handles (2)
28 Vacuum Motor Fan Inlet Screen
29 Rear Wheel (2)
30 Rear Squeegee Blade Removal Latch
31 Battery Charger
32 Solution Solenoid Valve
33 Solution Filter
34 Solution Shutoff Valve
35 Solution Pump
36 Latch
37 Recovery Tank Drain Hose
38 Solution Tank Level Sight Tube
39 Prop Rod
40 On-Board Charger Power Cord
41 Solution Tank Fill Port
42 Fuse Holder Boot (Main Fuse 100 Amp)
43 Machine Battery Connector
44 Location Tag
47 Recovery Tank Gasket
20
22
23
24
25
26
29
30 31
32
33
34
36
38
39
35
41
37
40
28
27
43
42
44
21 47

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CONTROL PANEL
A SmartKey™ Reader
B Power Switch
C Horn Switch
D Emergency Stop
E Control Circuit Breaker (5 Amp)
F Circuit Breaker (K1) (5 Amp)
G Steering Motor Circuit Breaker (15 Amp)
H Manual Operation Indicator
J Solution Flow Adjustment Switch
K Detergent Switch
L Vacuum Switch
M One-Touch™Scrub ON/OFF Switch
N Extra Pressure Switch
O Burst of Power Switch
P Speed Adjustment Knob
Q Forward Drive Switch
R Reverse Drive Switch
S Autonomous Help Screen Switch
S1 Autonomous Mode Indicator
T Stop Switch
U Record Switch
V Play/Pause Switch
W CopyCat™/Fill-In Switch
X Display (see Control Panel-Continued)
Y Information Switch & Navigation Switches
Z Magnetic SmartKey™
-Blue = User
-Yellow = Supervisor
CB2
5A
CB3
15A
CB1
5A K1
E
K
H
M
A
D
S T U V W
R
X
Q
P
J
G
L
Y
F
B
C
O
N
Z
S1

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CONTROL PANEL - CONTINUED
X1 Display Header (information will vary)
X2 Display Footer (information will vary)
X3 Battery Charge Indicator [see page 56]
X4 Vacuum Indicator
X5 Vacuum Indicator Bar Graph
FIRST = Quiet Mode
SECOND = Regular Mode
NONE = Off
X6 Detergent Indicator
X7 Detergent Ratio/Percentage Indicator
X8 Detergent Indicator Bar Graph
FIRST = Detergent Low Mode
SECOND = Detergent High Mode
NONE = Off
X9 Solution Flow Indicator
X10 Solution Flow Rate Bar Graph
FIRST = Low
SECOND = Medium
THIRD = High
NONE = Off
X11 Scrub Pressure Indicator
X12 Scrub Brush Pressure Bar Graph
FIRST = Regular
SECOND = Heavy
NONE = Off
X15 Time Display (Local)
scrub off
ON ON ON 100:1
MANUAL CLEANING
X5
X4
X8
X6
X10X12
X11 X9
X3
X15
X1
X2
X7

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CONTROL PANEL - CONTINUED
X14 Fault Indicator
X16 Recovery Tank Full Indicator
X17 Purge Indicator
X19 No Key Indicator
X20 Key Read Error Indicator [see Troubleshooting]
X21 Restricted User Key Indicator [see Troubleshooting]
X22 Burst of Power Indicator
X23 Solution Tank Empty Indicator
X24 Impact Lockout Indicator
X28 Advancing Lines (Playing back)
X30 Spinning Arrows / Computer Processing
X22
X19
X20
X21
X23
X17
X16
X24 X30 X28
X14

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INFORMATION MENU DISPLAY
Menu Display
Pressing the Information Switch (Y) will bring up the menu shown
below which allows the operator to change machine settings and
gather machine information. Use the two Navigation Arrows (Y1) (up
& down) to move through the menu. Use the left Navigation Arrow
(Y2) to exit or go back up a menu level. The information switch is
used to select or save a setting within the menu.
Menu visible with either blue (User) or yellow (Supervisor) SmartKey.
Menu Level Notes
1 2
Language
English* Menu display language
Autonomous cleaning
Delete this plan** Deletes the plan the machine is currently on
Add new Location tag** Adds a new location tag
Delete current tag #NNN** Deletes the current tag NNN (deletes all plans associated with the current tag)
Scan Location tag Forget the current tag and scan for a known tag
Online help GUIDES.NILFISK.COM/SC50
¢ back
QR code displayed. User can scan to
navigate to additional resources online.
GUIDES.NILFISK.COM/SC50
System
MMC F/W Display current rmware revision
Charger F/W Display current charger rmware revision
Charger P/N This is the custom SW part number of Nilsk charger. Only available in new chargers. Old
chargers will show “Legacy” New charger will show “NDS10002”
Serial Num Display PCB serial number from factory
CRL Compute Display current autonomy Compute controller rmware
CRL Platform Display current autonomy Platform controller rmware
CRL Safety Display current autonomy Safety controller rmware
CRL Camera Display current 3-D Vision Sensor rmware
CRL Laser Display current 2D Mapping Sensor rmware
Impact Log Display list of impact events with max value, timestamp and user id (only if enabled)
- single item view will show max values for each axis (x,y,z)
Log a Problem It puts a tag in autonomy log to help nd the root cause of the autonomy problem the user
experiences
CRL Wireless Update Go to menu for wireless update of autonomy rmware
Network Status Is network up, or down (down includes an error number)
IP Address IP Address of machine, shown as 123.456.789.555
QR String QR string scanned in from “Scan QR Code” menu command
MAC Address MAC address of the autonomy Kit
Autonomy ID Autonomy Kit Unique ID
F/W Checksum*** The CRC32 of the running rmware in the MMC
Update F/W*** Option to update autonomy and MMC (Main Machine Controller) rmware
*Default setting
**Only visible to blue User key if permission is granted by Supervisor.
***Supervisor and Technician Only
Y
MAIN MENU
Autonomous Cleaning
Online help
System
exit, select Y1
Y2
Language
Y1

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INFORMATION MENU DISPLAY – CONTINUED
Menu visible with either blue (User) or yellow (Supervisor) SmartKey.
Menu Level Notes
1 2
Hours Displays various system hours
On Time Displays Power ON hours
Drive Time Displays drive (non-neutral) hours
Scrub Time Displays scrub/brush ON hours
CopyCat Record Displays hours spent recording CopyCat plans
Fill-In Record Displays hours spent recording Fill-In plans
CopyCat Replay Displays hours spent playing back CopyCat plans
Fill-In Replay Displays hours spent playing back Fill-In plans
Recovery Time Displays recovery/vacuum ON hours
Log a Problem
It puts a tag in autonomy log to help nd the root cause of the autonomy problem the user
experiences
Software Update
Scan QR Code Used to scan QR Code
Download Update Used to download updated software
Install Update Used to install updated software after it has been downloaded
Faults**
Active Faults Displays list of active faults w/ timestamp and description
Fault History Displays list of fault history w/ timestamp and description
Clear History Clear history of all faults
Clear Active Faults Clear current active faults
**See Fault Code Display
Menu visible only with yellow (Supervisor) SmartKey.
Menu Level Notes
1 2 3
Options Supervisor selectable options
Language English* Menu display language
Scrub Max Light
Heavy* Maximum scrub level allowed
Solution SmartFlow* (proportional to speed)
Fixed Adjust solution ow to speed, or xed ow
Solution In Rev No*
Yes Leave solution on in reverse?
Warning Beep
Backup Beep*
Beep On
Beep Off
Beep when backing up, beep always on when
moving, beep off
Autonomy Beep
Beep Off*
Beep Low
Beep Medium
Beep High
Beep when scrubbing autonomously – off, low,
medium, high volume
Other Sounds
Normal*
Quiet
Off
Volume of sounds (apart from horn, starting
autonomy beep, and backup beep)
Manual Light
On to Scan*
Always On
Always Off
“On to Scan” means the LED strip will be white
with blue corners when the 3-D vision sensor is
attempting to read a Location Tag
*Default setting

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INFORMATION MENU DISPLAY – CONTINUED
Menu visible only with yellow (Supervisor) SmartKey.
Menu Level Notes
1 2 3
Options Supervisor selectable options
Obstacle Color Orange*
Red
Color of “Obstacle” chasing lights displayed on
LED status bar when an obstacle is encountered
Detergent Low
(300,256,200,150,128,100,64,50,32,26):1
– ratio cannot be > Detergent High
(0.3, 0.4, 0.5, 0.7, 0.8, 1.0, 1.5, 2.0, 3.0, 3.8)%
– percentage cannot be > Detergent High
Set detergent ratio for detergent low level
Detergent High
(300,256,200,150,128,100,64,50,32,26):1
– ratio cannot be < Detergent Low
(0.3, 0.4, 0.5, 0.7, 0.8, 1.0, 1.5, 2.0, 3.0, 3.8)%
– percentage cannot be < Detergent Low
Set detergent ratio for detergent high level
Detergent shown as xxx:1
x.x% Ratio or percentage
Neutral Delay (s)
min = 0.5*
max = 5.0
step = 0.5
Time to keep brushes on when in neutral
(seconds)
Vac Off Delay (s)
min = 15*
max = 25
step = 1
Time to keep vacuum on after turning off scrub
system (seconds)
Burst Of Power (s)
min = 60*
max = 300
step = 60
Burst-of-power (BOP) time span (seconds)
Fwd Speed Max (%)
min = 50%
max = 100%*
step = 10
Maximum forward speed as percentage of
maximum available speed in manual mode
Record Speed Max (%)
min = 50%
max = 100%*
step = 10
Maximum forward speed allowed while recording
(as percentage of maximum available speed in
manual mode)
Inactive Time (min)
min = 5
max = 60
step = 5
default = 15
Inactivity time before putting machine in sleep
mode (minutes)
User
Replay Only*
Replay/Record
Replay/Record/Delete
User key plan permissions -- only replay; replay
and record; replay, record, and delete plans
No Add/Delete Tags*
Add Tags
Add/Delete Tags
User key location tag permissions -- no
permissions, can add tags, can add and delete
tags
Delete ALL PLANS? No*
Yes Deletes all plans
Delete ALL TAGS? No*
Yes Delete all tags (and plans)
Ignore water meter? No*
Yes
Ignore water meter and do constant ow with no
feedback loop. Allows operator to keep cleaning in
autonomous or manual mode with a broken ow
meter.
*Default setting

A - 18 Nilsk Liberty SC50 - 56091204 12/2017
INSTRUCTIONS FOR USEA - ENGLISH 6/2020
INFORMATION MENU DISPLAY – CONTINUED
Menu visible only with yellow (Supervisor) SmartKey.
Menu Level Notes
1 2 3
Options Supervisor selectable options
OvrCurProt. Enabled? No
Yes*
Over Current Protection can be disabled for using the machine on certain
rubber ooring where current draw is higher than expected
Impact Level High*
Low
Impact detection sensitivity level. If nuisance tripping occurs (i.e. driving
over a oor transition), adjust setting to low.
Impact Action Log Only*
Log & Lock
Impact detection status
Log Only – Impact is recorded
Log & Lock – Impact is recorded and User is locked out of scrub functions
(Display shows (X24)) until machine is reset with a Supervisor key.
Impact Log User ID? No*
Yes Whether to record the User ID in the impact log
Show Charging Lights? Yes*
No
LED status bar will display a visual indication of the batteries level of
charge while batteries are being charged (see page 51)
Date/Time/Timezone
Set the date, time and timezone
Timezone Choose timezone that matches machine’s location
Hour Set current time, hours in 24-hour format
Minute Set current time minutes
Second Set current time seconds
Year Set current year
Month Set current month
Day Set current day
*Default setting

12/2017 A - 19 56091204 - Nilsk Liberty SC50
ENGLISH - AINSTRUCTIONS FOR USE
6/2020
AUTONOMOUS HELP SCREEN
Pressing the Autonomous Help Screen Switch (S) will bring up a help screen of information and/or
actions the operator can take at that particular point in time (screen will vary depending upon what the
machine is currently doing, where it’s located and what is allowed). Use the four Navigation Arrows (Y1)
to move through the screen. Use the information switch to make a selection and the left arrow key to exit
the screen. The table below shows actions that can be taken directly from the screen, the table on the
previous page shows informational messages.
S
Machine State Appears on Display Autonomous Help Screen
At machine start up,
autonomy system is booting
up 35
menu, ff scrub on
MACHINE READY
Forautonomous
cleaning, drive to
location tag
¢ exit
Manual mode available
AUTONOMY BOOTING UP . . . 48
Tag: ...
No location tag scanned nor
stored, machine CANNOT
see a location tag
MACHINE READY
menu, ff scrub on
For autonomous
cleaning, drive to
location tag
¢ exit, $ select
Set new location tag
NO LOCATION TAG
Location tag scanned.
Machine not located on a
recorded plan
MACHINE READY
$ menu, £ record
To play back or
record plan, drive to
start point
¢ exit, $ select
Record new plan (¨)
Scan location tag
NOT ON PLAN
Delete tag #227
Tag: 227
Location tag scanned.
Machine is located within the
start area of a recorded plan.
menu, >= start
AUTONOMOUS CLEANING
Start point found
Press >= to start plan
¢ exit, $ select
Start plan (>=)
Scan location tag
AUTONOMY
Delete this plan
Tag: 227
Delete tag #227
Location tag scanned.
Machine is located on a
recorded plan but not within
the start area of the plan.
MACHINE READY
$ menu, £ record
To play back or
record plan, drive to
start point
¢ exit, $ select
Record new plan (£)
Scan location tag
ON PLAN
Delete tag #227
Tag: 227
Autonomy module is not
responding
menu, ff scrub on
MACHINE READY
Autonomy not
responding. Manual
cleaning only.
¢ exit
Manual mode only
Autonomy not responding
AUTONOMY UNAVAILABLE
*Tag: 0 . . moving “0” indicates that machine is actively scanning for a location tag.
**Tag: Example “Tag: 227” where “227” is the location tag ID number.

A - 20 Nilsk Liberty SC50 - 56091204 12/2017
INSTRUCTIONS FOR USEA - ENGLISH 6/2020
UNDERSTANDING AUTONOMY
The Nilsk Liberty SC50 can function autonomously meaning that it functions (operates) on its own, on a plan determined by an operator without
further operator involvement. The machine can record an area to clean independently and actively maneuver around certain obstacles.
Components that make up the Autonomy system, and their basic function, include the following (shown in Figure 1-1):
• 3-D Vision Sensor (45) - provides a three-dimensional image of the area in front of the machine.
• 2D Mapping Sensor (14) - provides detection of obstacles in front of and to the left of the machine.
• Drop-Off Sensor (16) - detect drop-offs, or major changes in oor elevation.
• Safety Sensor (17) - located at front corners of machine – aides in collision prevention and presence detection in the area of an
operating machine.
• Autonomous Controller (46). This is the primary computer for safety during operation.*
• Computer software Interface, (not shown). Denes how the autonomous control system interfaces with machine control software and
control system.
FIGURE 1-1
16
17
14
46
17
45