SS300 Service Manual Nobles Walk Behind Floor Scrubber

2018-06-12

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ENGLISH

SPEED SCRUB® 300
R

Automatic Floor Scrubber
Service Information Manual

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

9014516
Rev. 01 (3-2017)

*9014516*

INTRODUCTION

INTENDED USE

This manual is available for each new model. It provides
necessary operation and maintenance instructions.

The automatic floor scrubber is intended for commercial
use, for example in hotels, schools, hospitals, factories,
shops, offices and rental businesses. It is designed to
scrub hard floor surfaces (concrete, tile, stone, synthetic,
etc.) in an indoor environment. Do not use this machine on
carpeted surfaces. Use only recommended pads/brushes
and commercially available floor cleaning detergents. Do
not use this machine other than described in this Operator
Manual.

Read this manual completely and understand the machine before operating
or servicing it.
This machine will provide excellent service. However, the
best results will be obtained at minimum costs if:
• The machine is operated with reasonable care.
• The machine is maintained regularly - per the machine
maintenance instructions provided.
• The machine is maintained with manufacturer supplied
or equivalent parts.

PROTECT THE ENVIRONMENT
Please dispose of packaging materials and
used machine components such as batteries in
an environmentally safe way according to your
local waste disposal regulations.

MACHINE DATA
Please fill out at time of installation for future reference.
Model No. - ___________________________________________

Serial No. - ___________________________________________
Installation Date - ______________________________________

SERIAL NUMBER LOCATION

Always remember to recycle.

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

Carefully check machine for signs of damage. Report
damages at once to carrier. Contact distributor or Tennant
for missing items.

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

To uncrate the machine, remove straps, wheel blocks and
shipping brackets. Using the supplied ramp carefully back
the machine off the pallet. Make sure scrub head is in the
raised position.

Trojan and HydroLINK are registered trademarks of Trojan Battery
Company.
This product may contain portions of software that have various 3rd
party licenses. More information can be found at: www.tennantco.com/
opensource
Specifications and parts are subject to change without notice.
Original Instructions. Copyright © 2015- 2017 Tennant Company. All rights
reserved.

ATTENTION: Do not remove machine from pallet
without using ramp, machine damage may occur.

CONTENTS
CONTENTS
Introduction......................................................2
Intended Use....................................................2
Machine Data...................................................2
Serial Number Location...............................2
Uncrating Machine...........................................2
Contents.................................................................3
Safety Precautions.................................................5
General Information................................................9
Component Locator.....................................9
Electrical Schematic Symbols...................10
Electrical Schematic
(Drive Model) - 1 Of 2...........................12
Electrical Schematic
(Push Model) - 1 Of 2...........................14
Fastener Torque........................................17
Sae (Standard)..........................................17
Metric........................................................17
General Machine Dimensions/
Capacities/Performance.......................18
General Machine Dimensions/
Capacities/Performance.......................19
Maintenance.........................................................24
Maintenance Chart....................................24
Machine Maintenance...............................25
After Daily Use..........................................25
After Weekly Use......................................27
After Every 50 Hours Of Use.....................28
After Every 100 Hours Of Use...................28
Electric Motors..........................................29
Belts..........................................................29
Orbital Scrub Head Isolators (Lower)........29
Batteries....................................................30
Maintenance-Free Batteries......................30
Flooded (Wet) Lead-Acid Batteries...........30
Checking Connections / Cleaning.............30
Charging Batteries....................................31
Squeegee Blade Replacement.................32
Ec-H2o Nanoclean Water Conditioning
Cartridge Replacement........................33
Loading/Unloading Machine For
Transporting.........................................34
Storing Machine........................................35
Freeze Protection......................................35
Troubleshooting....................................................36
Faults........................................................36
Faults - Off Board Battery Charger...........49
Troubleshooting .......................................50
Onboard Battery Charging On (Option)....52

SS300 Service Information (3-2017)

Batteries Failed To Charge/ Reduced
Run Time (Onboard Charger)..............53
Off Board Battery Charging On
(Option)................................................54
Batteries Failed To Charge/ Reduced
Run Time (Off Board Charger).............55
Power-Up On............................................56
Machine Failed To Power Up....................57
Propel Subsystem (Option).......................58
Failed To Propel........................................59
Scrub Motor On ........................................60
Scrub Motor Failed To Turn On ...............61
Vacuum Fan On .......................................62
Vacuum Fan Failed To Turn On ..............63
Solution Control On (Conventional)..........64
Solution Control Failed To Turn On
(Conventional)......................................65
Solution Control On (Ec-H2o)...................66
Solution Control Failed To Turn On
(Ec-H2o)...............................................67
Sun-I/O Circuit Board Testing
(Universal Schematic)..........................68
Sun-I/O Circuit Board Testing
Procedure.............................................69
Can Open Network Issues........................70
Connectors Fully Seated...........................70
Pin Fully Seated........................................70
Network Resistance..................................70
Node (Module) Resistance........................71
Wire Continuity To Node...........................71
Machine Node Table.................................72
Service.................................................................73
Service Diagnostics Tool...........................73
Programing A New Interface Module.........73
Re-Configuring Existing Modules..............75
Programming The I-Drive Module
(Option)................................................77
Displaying Fault Codes.............................78
Battery Charger Settings...........................79
Off-Board Battery Charger:.......................79
Changing Off-Board Battry Charger
Settings................................................79
On-Board Battery Charger........................81
Changing On-Board Battery Charger
Settings (Pro-Membrane Model)..........81
Changing On-Board Battery Charger
Settings (Pro-Panel Model)..................82
Battery Charger Operation........................83

CONTENTS
Removing Scrub Head Assembly..............84
Installing Scrub Head Assembly................85
Checking And Adjusting Cylindrical
Scrub Brush Pattern.............................85
Removing Lower Orbital Head Isolators...88
Installing Lower Orbital Head Isolator.......89
Removing Transaxle Assembly (Option)...89
Installing Transaxle Assembly (Option).....90
Ptc (Push-To-Conect) Fittings...................91
Making A Connection................................91
Disconnecting............................................92
Removing Vacuum Fan.............................92
Installing Vacuum Motor............................93
Removing Carbon Brushes.......................94
Installing Carbon Brushes.........................94
Removing Water Solenoid........................95
Installing Water Solenoid..........................96
Adjusting Water Solenoid..........................97
Controll Modules............................................99
Removing Machine Control Module
(Option)................................................99
Installing Control Module.........................100
Removing I-Drive Module (Option)..........100
Installing I-Drive Module (Option)............101
Removing Onboard Battery Charger
(Optiion)..............................................101
Installing Onboard Battery Charger.........102
Removing Interface Module....................103
Installing Interface Module......................103
Removing Bail Switch, Speed
Potentionmeter, Or
Directional Switch...............................104
Installing Bail Switch, Speed
Potentiometer, Or Directional
Switch.................................................106

SS300 Service Information (3-2017)

SAFETY PRECAUTIONS
SAFETY PRECAUTIONS

IMPORTANT SAFETY INSTRUCTIONS - SAVE THESE INSTRUCTIONS
The following warning precautions are used throughout
this manual as indicated in their description:

WARNING: To warn of hazards or unsafe
practices which could result in severe personal
injury or death.
FOR SAFETY: To identify actions which must be
followed for safe operation of equipment.
The following information signals potentially
dangerous conditions to the operator. Know when
these conditions can exist. Locate all safety devices on
the machine. Report machine damage or faulty
operation immediately.

WARNING: To Reduce the Risk of Fire,
Explosion, Electric Shock or Injury:
-

Read manual before operating machine.

Do not use or pick up flammable materials.

Do not use near flammable liquids, vapors or
combustible dusts.
This machine is not equipped with an
explosion proof motor. The electric motor will
spark upon start up and during operation
which could cause a flash fire or explosion if
machine is used in an area where flammable
vapors/liquids or combustible dusts are
present.

Batteries emit hydrogen gas. Explosion or fire
can result. Keep sparks and open flame away
when charging.

Disconnect battery cables and charger cord
before cleaning and servicing machine.

Do not charge batteries with damaged cord. Do
not modify plug.
If the charger supply cord is damaged or
broken, it must be replaced by the
manufacturer or its service agent or a similarly
qualified person in order to avoid a hazard.

Do not use outdoors. Store indoors.

Spinning pad/brush, keep hands away.

WARNING: Magnetic Field Hazard. Magnetic
pad driver/brush can be harmful to pacemaker
wearers or medical implants.
This machine may be equipped with technology
that automatically communicates over the cellular
network. If the machine will be operated where cell
phone use is restricted because of concerns
related to equipment interference, please contact a
Tennant representative for information on how to
disable the cellular communication functionality.

SS300 Service Information (3-2017)

FOR SAFETY:
1. Do not operate machine:
- Unless trained and authorized.
- Unless operator manual is read and
understood.
- Unless mentally and physically capable of
following machine instructions.
- Under the influence of alcohol or drugs.
- While using a cell phone or other types of
electronic devices.
- If not in proper operating condition.
- In outdoor areas. This machine is for
indoor use only.
- In areas where flammable vapors/liquids or
combustible dusts are present.
- With pads or accessories not supplied or
approved by Tennant. The use of other
pads may impair safety.
- In areas with possible falling objects.
- In areas that are too dark to safely see the
controls or operate machine.
2. Before operating machine:
- Check machine for fluid leaks.
- Make sure all safety devices are in place
and operate properly.
3. When operating machine:
- Use only as described in this manual.
- Report machine damage or faulty operation
immediately.
- Wear closed- toe, non- slip work shoes.
- Reduce speed when turning.
- Go slowly on inclines and slippery
surfaces.
- Do not scrub on inclines that exceed 9%
grade or transport on inclines that exceed
21% grade.
- Follow site safety guidelines concerning
wet floors.
- Follow mixing, handling and disposal
instructions on chemical containers.
- Do not carry passengers on machine.
- Use care when reversing machine.
- Keep children and unauthorized persons
away from machine.
- Do not allow machine to be used as a toy.

SAFETY PRECAUTIONS

4. Before leaving or servicing machine:
- Stop on level surface.
- Set the parking brake, if equipped.
- Turn off machine and remove key.
5. When servicing machine:
- Disconnect battery connection and charger
cord before working on machine.
- All work must be done with sufficient
lighting and visibility.
- All repairs must be performed by trained
personnel.
- Use Tennant supplied or approved
replacement parts.
- Do not modify the machine from its original
design.
- Do not jack up machine.
- Avoid moving parts. Do not wear loose
clothing or jewelry and secure long hair.
- Do not disconnect the off- board charger’s
DC cord from the machine’s receptacle
when the charger is operating. Arcing may
result. If the charger must be interrupted
during charging cycle, disconnect the AC
power supply cord first.
- Do not use incompatible battery chargers
as this may damage battery packs and
potentially cause a fire hazard.
- Inspect charger cord regularly for damage.
- Keep work area well ventilated.
- Avoid contact with battery acid.
- Keep all metal objects off batteries.
- Do not power spray or hose off machine.
- Use a hoist or adequate assistance when
lifting batteries.
- Battery installation must be done by trained
personnel.
- Wear personal protection equipment as
needed and where recommended in this
manual.

6. When loading/unloading machine onto/off
truck or trailer:
- Drain tanks before loading machine.
- Use a ramp, truck or trailer that can support
the machine weight and operator.
- Do not operate the machine on a ramp
incline that exceeds a 21% grade level.
- Use a winch if ramp incline exceeds a 21%
grade level.
- Lower the scrub head and squeegee before
tying down machine.
- Turn machine off and remove key.
- Set parking brake (if equipped).
- Block machine wheels.
- Use tie- down straps to secure machine.

For Safety: wear protective gloves.
For Safety: wear eye protection.

SS300 Service Information (3-2017)

SAFETY PRECAUTIONS
SAFETY LABELS
The safety labels appear on the machine in the locations indicated. Replace labels if they are missing or become
damaged or illegible.
WARNING LABEL - Located on recovery tank cover.

FOR SAFETY LABEL Do not power spray or
hose off machine.
Electrical malfunction
may occur.
Located on control console
WARNING LABEL Spinning pad. Keep hands away.
Located on disk scrub head model.

WARNING LABEL Spinning brush. Keep hands away.
Located on cylindrical scrub head
model.

WARNING LABEL Magnetic Field Hazard. Magnetic
pad driver/brush can be harmful
to pacemaker wearers or medical
implants.
Located on Insta-Click magnetic
pad driver/brush.
SS300 Service Information (3-2017)

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

WARNING LABEL Batteries emit
hydrogen gas.
Explosion or fire can
result. Keep sparks
and open flame away
when charging.
Located on bottom side
of recovery tank.

SAFETY PRECAUTIONS

SAFETY LABELS
The safety labels appear on the machine in the locations indicated. Replace labels if they are missing or become
damaged or illegible.
WARNING LABEL Flammable
materials or
reactive metals can
cause an explosion
or fire. Do not pick
up.
Located near control
console.

FOR SAFETY
LABEL - Read
manual before
operating
machine.
Located near
control console.

WARNING LABEL Batteries emit
hydrogen gas.
Explosion or fire
can result. Keep
sparks and open
flame away when
charging.
Located on control
console and bottom
side of recovery tank.

WARNING LABEL Flammable
materials can cause
explosion or fire. Do
not use flammable
materials in tank(s).
Located on backside
of solution tank cover.

WARNING LABEL Do not charge
batteries with
damaged cord.
Electric shock can
result. Disconnect
charger cord before
servicing.
Located on control
console.

WARNING LABEL Spinning pad. Keep
hands away.
Located on disk scrub
head model.

WARNING LABEL Spinning brush. Keep
hands away.
Located on cylindrical
scrub head model.

FOR SAFETY LABEL Do not power spray or
hose off machine.
Electrical malfunction
may occur.
Located on control console

WARNING LABEL Magnetic field hazard. Magnetic
pad driver/brush can be harmful
to pacemaker wearers or medical
implants.
Located on Insta-Click magnetic pad
driver/brush.

WARNING LABEL - Electrical
Hazard. Disconnect battery
cables before servicing
machine.
Located on circuit board panel.

SS300 Service Information (3-2017)

GENERAL INFORMATION
GENERAL INFORMATION
Component Locator

Components
A

Batteries

Circuit Breakers and Optional
Machine Control Module

ec-H2O System Components

Scrub Head Lift Contact
Switch

Parking Brake Switch

Scrub Head Drive Belt

A
I
B
H

G Scrub Motor (Disk Shown)
H

SE (Severe Environment)
System
G

Components
I

Solution Tank Fill Port

Onboard Battery Charger*

Interface Module w/ mini-USB
Programming Port

Internal Bail Switch

M Forward/ Reverse Propel
Switch*
N

Scrub Head Linkage
(Configurable)

O Transaxle Assembly*
P

Rear Squeegee Lift Contact
Switch

Q I-Drive Propel Control Module*
* Optional Equipment

Q
P

SS300 Service Information (3-2017)

GENERAL INFORMATION

Note:
ecH2O Side Brush
J7-12 Low=SV3 H20 Valve ON
ecH2O Pump ON 100%

Note:
ecH2O Enable:
ELECTRICAL SCHEMATIC SYMBOLS
J7-10 Low=Turn ON ecH2O

IGN ST

Pr
Sw
Sw
Va

CB16 (

Battery

Circuit Breaker

DPDT Switch

Key Switch
Fuse

Pressure Switch
Connected

Diode

Motor
Not Connected

Single Continuation Tab

Connector

Energized

3 Phase AC
Induction Motor

67/PUR

Double Continuation Tab

FaST/ES Pump

Relay Coil
Adaptor Harness

Motor Encoder

N.C. Relay Contacts

Sensor
(Variable Resistor)

N.O. Relay Contacts

Momenary Switch N.O.

Horn or Alarm

Contact Switch N.C.

Notes

Sweep OFF/Down = 2-1
Sweep ON/Center = 2-3
Vac & Sweep ON/Up =

Assembly

AC Plug

Capacitor

Light

Solenoid Valve

Operational Matrix:
Enabled (Ap

SS300 Service Information (3-2017)

ElectroMagnetic
Brake

• Key Off
• Neutral - Re
• Brake Comm
• Seat Switch
• Curtis 1234
(See Trouble

GENERAL INFORMATION

SS300 Service Information (3-2017)

GENERAL INFORMATION
ELECTRICAL SCHEMATIC (DRIVE MODEL) - 1 of 2
B+/GND CABLE ASSY

1/RED

12 VDC

B+/GND CABLE ASSY

-12 VDC

CB-1
4A
4/YEL

1/RED

13/BLK

CHARGER: ON BOARD

OFF BOARD CHARGER CABLE ASSY

AC PLUG

P2-11

P2-14

P2-13

P2-12

P2-3

P2-5

CABLE, CHARGER

GND

P1-B-

13/BLK

RETURN

CAN_GND

RESERVED2

CAN-

CAN+

B+

N.O.

RESERVED3 RESERVED1

SENSE-

LED-

LED+

COM

SENSE+

COM

SW-2

BATTERY /
CHARGER
SYSTEMS

J2-1

4/YEL

INTERFACE MODULE

P2-7

P2-8

P2-9

P2-6

P2-1

P2-10

P2-4

P2-2

1/RED

P1-B+

N.C.
CHARGER INTERLOCK SWITCH (N.C.)
OFF-BOARD CHARGER ONLY: SW.
OPEN = CHARGING

J2-2

5/GRN

113/BLK/WHT

J3-3

CAN+ /YEL

J3-1

CAN- /GRN

J3-2

J2-3

J3-4

GND

SHLD_GND

CAN-

13/BLK

J2-12

J7-3

2/BRN

J2-6

13/BLK

INPUT_1

27/PUR

CAN-

INPUT_0
7/PUR

J7-9

6/BLU J7-10
6/BLU

J7-4

27/PUR

J2-10

SW-6
27/PUR
SCRUB HEAD POSITION (N.C.H.O.)
(SW. RELEASED = CLOSED = HEAD DOWN)
(SW. HELD = OPEN = FULL UP POSITION)

13/BLK

J7-2

18/GRY

J2-11

SW-5
18/GRY
PARK BRAKE SW. (N.C.H.O.)
(SW. RELEASED = CLOSED = BRAKE ON)
(SW. HELD = OPEN = BRAKE OFF)

13/BLK

CHARGER INPUT

M1A

HM-1
20/TAN
HOURMETER

J7-7

E-STOP

KSI

J7-1

J2-9

38/GRY

J2-14

20/TAN J7-6
LSD_OUT_1
J2-8

20/TAN

E-STOP
( 0VDC = STOP)

LSD_FLYBACK

NOT USED

J2-15

NOT USED

BASE CONTROL
MODULE

6/BLU

13/BLK

EC-H2O SWITCH
( MOM. SWITCH. TOGGLES
EC-H2O ON/OFF )

J2-5

6/BLU

SW-3

2/BRN

N/C

INPUT_2

6/BLU

J7-8

CAN+

SW-1: KEY SWITCH

CAN COMMUNICATION

J2-4
CAN+/YEL

CAN-/GRN

7/PUR

5/GRN

1/RED

CABLE, CHARGER

(2) 12VDC BATTERIES

85
20/TAN
AUX. SCRUB BRUSH RELAY

SV-1

J6-5

GND_SHIELD
54/YEL J7-5
LSD_OUT_0
J6-4
J2-13
ID

54/YEL
SOLUTION (CONV.)

USB PORT

6/BLU

J6-3

6/BLU

D+
J6-2
DJ6-1
V_BUS

6
E-STOP SWITCH (N.C.)
(OPEN = STOP)

J9: 20 PINS

OPERATOR'S
SWITCH/LED
TOUCHPANEL

6/BLU

NOT USED
SENSOR_IN
+5V OUT
SENSE_GND

J4-2

NO CONNECTION
SW-7

J4-4

31/PNK

J4-1

30/TAN

BAIL SWITCH INPUT @ J4-4: 0V OR 5V
0V = NEUTRAL / SCRUB MTR OFF.
5V = MAX. PROPEL / SCRUB MTR ON.

BAIL SWITCH (N.O.)

J4-3

NO CONNECTION
BAIL SW. HARNESS

38/GRY

TX_2
RX_2
38

J1-1

JTAG PORT

J5-4
RX

KSI

OPEN_B

13/BLK

P1-5

38/GRY

P1-4

27/PUR

OPEN_C

PROPEL SPEED
(LOW = PROPEL SPEED)

P1-6
P1-14
P1-13

37/PUR

J1-5

37/PUR

P1-12

36/BLU

J1-4

36/BLU

WHT
J11-2

AUX2_OUT

REVERSE

SW-9
WHT

J11-1

P1-11

AUX3_OUT

POT LOW

P1-8

35/GRN

J1-3

35/GRN

P1-9

34/YEL

J1-2

34/YEL

GRN
GRN

GRN

1
POT.-1
100K PROPEL SPEED LIMIT

J10-2

PROG_B+
POT HIGH

P1-2

J1-1

33/ORA

REVERSE SWITCH
(GND. = REV.)

J10-3

SPD LIMIT

P3-2

PROPEL ON/OFF FROM E-STOP
( B+ = ENABLE PROPEL)

FUSED, B+_OUT
GND_REF

P1-3

13/BLK

PROPEL SYSTEM

P1-7

STATUS

P2-B-

P3-4
B-

LOW SPEED

P1-10

13/BLK

J1-6

J1-7

10/TAN P2-M2

13/BLK
BLK

MTR1
10/TAN

BAIL ON/OFF

B+

P2-B+

9/WHT P2-M1
M1
PROPEL MOTOR

P3-3

DIGITAL_GND

8/GRY

P1-1

P3-1

8/GRY

30A

RED

J1-8

J1-9

CB-4

J2-2

13/BLK
VAC FAN RELAY

D-2

NAT.

1/RED

J2-1

SHIELD

1/RED

J2-3

M3A

J5-3

3/ORA

SQUEEGEE POSITION (N.C.H.O.)
(SW. RELEASED = CLOSED = DOWN)
(SW. HELD = OPEN = FULL UP POSITION)

J5-2

J5-1

SW-8
38/GRY

JTAG
TX

BAIL OUT

38/GRY

COMM_GND

38/GRY

RS232 DEBUG
PORT

COM_GND2

J10-1

I-DRIVE
6

6/BLU

M1B

42/BRN
AUX. SCRUB BRUSH RELAY

M4A

13/BLK

SCRUB BRUSH RELAY
D-1
42/BRN

CB-5

M4B

1/RED

CB-6

15/GRN

26/BLU
SCRUB BRUSH RELAY

37A

20A

M3B

30
VAC FAN RELAY

29/WHT

13/BLK
MTR2

13/BLK

SCRUB BRUSH MOTOR

MTR3

13/BLK
VAC FAN MOTOR
13

12/BRN

BATTERY+

1/RED

SS300 Service Information (3-2017)

GENERAL INFORMATION
ELECTRICAL SCHEMATIC (DRIVE MODEL) - 2 of 2
13
GROUND

CAN+
CAN+/YEL

1/RED

CAN-/GRN

CAN COMMUNICATION

CAN-

1
BATTERY+

R-1
120 OHM

87
CB-2
43/ORA

46/BLU

J12-11

46/BLU

J12-12

66/BLU

J12-13

VCC_1

CAN-

VCC_2

CAN+

CAN+/YEL

CAN-/GRN

M2B

EC-H2O RELAY

(LOCATED IN HARNESS)

J12-3
J12-2

VALVE_SUPPLY

MTR-5

67/PUR J12-14
VALVE_OUTPUT
EC-H2O WCM PUMP

GND_2

J12-5

13/BLK

J12-6
NO

MTR-6

CB-3
43/ORA

50/TAN
(A)

J12-8

52/BRN
(B)

PUMP

PRESS_IN

J12-9

60/TAN

EC-H2O/FAST PUMP

50/TAN

52/BRN

OPEN_1

COM

NC 13/BLK

SW-10
PRESS NC, OPENS @ 6PSI +/-2PSI = FAULT

J12-1

C-1 CAPACITOR, 0.01UF, 200V

OPEN_2

4EA/YEL

J11-4

4EB/YEL

J11-5

OPEN_3

J12-4

EC-H2O MODULE

GND_1

J12-7

CELL_A1
CELL_A2

EC-H2O
CELL

OPEN_4

J12-10
SW-11

3EA/ORA J11-3

6
SWITCHED/FUSED/B+

3EB/ORA J11-6

CELL_B1

FLUSH_GND

CELL_B2

FLUSH_SW

OPT. EC-H2O MODULE HARNESS

J11-1
J11-2

EC-H20 FLUSH SW.
13EA/BLK-WHT
9EA/WHT

EC-H20 MODULE

EC-H2O RELAY

6/BLU

M2A

13/BLK

D-3
6/BLU
105/GRN
REAR FRAME

105/GRN
OP.STATION BASE

105/GRN
EC-H2O

105/GRN
TRANSAXLE

105/GRN

VAC FAN1

STATIC GROUND
@ THE SCRUB HEAD

J2-7
105/GRN
USER INTERFACE
STATIC GROUNDING
(PART OF MAIN HARNESS
AND OP.STATION HARNESS)
KEY SWITCH1

SS300 Service Information (3-2017)

GENERAL INFORMATION
ELECTRICAL SCHEMATIC (PUSH MODEL) - 1 of 2
+

1/RED

12 VDC
CB-1
4A

(2) 12VDC BATTERIES

4/YEL

1/RED

13/BLK

CHARGER: ON BOARD

AC PLUG

P2-11

P2-14

P2-13

P2-12

P2-3

P2-5

SENSE-

CABLE, CHARGER

13/BLK

RETURN

RESERVED2

CAN_GND

CAN-

CAN+

B+

N.O.

RESERVED3 RESERVED1

LED-

LED+

COM

SENSE+

COM

SW-2

P1-B-

GND

OFF BOARD CHARGER CABLE ASSY #1077634

BATTERY /
CHARGER
SYSTEMS

J2-1

4/YEL

INTERFACE MODULE

P2-7

P2-8

P2-9

P2-6

P2-1

P2-10

P2-4

P2-2

1/RED

P1-B+

N.C.
CHARGER INTERLOCK SWITCH (N.C.)
OFF-BOARD CHARGER ONLY: SW
OPEN = CHARGING

113/BLK/WHT

J3-3

CAN+ /YEL

J3-1

CAN- /GRN

J3-2

GND

SHLD_GND
CAN+

INPUT_1

J2-2

5/GRN

J2-3

J3-4

N/C

INPUT_2

CAN-

+5VDC_OUT

J7-9

6/BLU J7-10

6/BLU

J7-3

13/BLK

( MOM. SWITCH. TOGGLES
EC-H2O ON/OFF )
SW-3
2/BRN

2/BRN

13/BLK

EC-H2O SWITCH

INPUT_0

7/PUR

J2-12

J7-8

CAN-

CAN+

SW-1: KEY SWITCH

CAN COMMUNICATION

J2-4
CAN+/YEL

CAN-/GRN

7/PUR

1/RED

5/GRN

CABLE, CHARGER

B+/GND CABLE ASSY

-12 VDC

J7-4

27/PUR

J2-10

SW-4
SCRUB HEAD POSITION (N.C.H.O.)
(SW. RELEASED = CLOSED = HEAD DOWN)
(SW. HELD = OPEN = FULL UP POSITION)

J7-2

18/GRY

J2-11

SW-5
18/GRY
PARK BRAKE SW. (N.C.H.O.)
(SW. RELEASED = CLOSED = BRAKE ON)
(SW. HELD = OPEN = BRAKE OFF)

J7-1

38/GRY

J2-9

CHARGER INPUT

13/BLK

105/GRN
NOT USED

KSI

REAR FRAME

J2-14

J2-5
6/BLU

HM-1

6/BLU

- HOURMETER

J7-6

20/TAN

105/GRN

LSD_FLYBACK

NOT USED

J2-15

OP.STATION BASE

105/GRN

LSD_OUT_1

EC-H2O

J2-8

85
20/TAN
AUX. SCRUB BRUSH RELAY

BASE CONTROL
MODULE

6/BLU

M1A

J7-7

105/GRN
TRANSAXLE

#1062385
54/YEL
SOLUTION (CONV.)

6/BLU

J7-5
J2-13

GND_SHIELD
LSD_OUT_0
ID
D+
DV_BUS

J6-5
J6-4
J6-3
J6-2
J6-1

USB PORT

SV-1

105/GRN

VAC FAN1

STATIC GROUND
@ THE SCRUB HEAD

J2-7
105/GRN
USER INTERFACE
STATIC GROUNDING
(PART OF MAIN HARNESS
AND OP.STATION HARNESS)
KEY SWITCH1

J9: 20 PINS

OPERATOR'S
SWITCH/LED
TOUCHPANEL

NOT USED
SENSOR_IN
+5V OUT
SENSE_GND

J4-2

NO CONNECTION
SW-7

J4-4

31/PNK

J4-1

30/TAN

BAIL SWITCH (N.O.)

J4-3

BAIL SWITCH INPUT @ J4-4: 0V OR 5V
0V = NEUTRAL / SCRUB MTR OFF.
5V = MAX. PROPEL / BURNISH MTR ON.

NO CONNECTION
OPT: BAIL SW. HARNESS

TX_2
RX_2
BAIL OUT

J5-2

J5-3

J5-4

SHIELD

NAT.

RED

BLK

J2-1
J2-2
J1-1

JTAG PORT

J1-6

J1-7

13/BLK
VAC FAN RELAY

13/BLK

D-2

M1B

AUX. SCRUB BRUSH RELAY

M4A

13/BLK

PROPEL SYSTEM

6/BLU

M3A

J1-8

J1-9

J5-1

3/ORA

SQUEEGEE POSITION (N.C.H.O.)
(SW. RELEASED = CLOSED = DOWN)
(SW. HELD = OPEN = FULL UP POSITION)

J2-3

COMM_GND

6
SWITCHED/FUSED/B+
SW-8
6/BLU

1/RED

JTAG

RS232 DEBUG
PORT

COM_GND2

SCRUB BRUSH RELAY

D-1
42/BRN

1/RED

CB-5

12/BRN

M4B

1/RED

CB-6
20A

15/GRN

MTR2

26/BLU
SCRUB BRUSH RELAY

37A
M3B

13/BLK

SCRUB BRUSH MOTOR
MTR3

30
VAC FAN RELAY

29/WHT

13/BLK
VAC FAN MOTOR

BATTERY+

SS300 Service Information (3-2017)

GENERAL INFORMATION
ELECTRICAL SCHEMATIC (PUSH MODEL) - 2 of 2

13
GROUND

CAN+
CAN+/YEL

1/RED

CAN-/GRN

CAN COMMUNICATION

CAN-

1
BATTERY+

R-1
120 OHM
(LOCATED IN HARNESS)

87
46/BLU

J12-11

46/BLU

J12-12

66/BLU

J12-13

VCC_1

CAN-

VCC_2

CAN+

CAN+/YEL

CAN-/GRN

M2B

EC-H2O RELAY

30
CB-2
43/ORA

J12-3
J12-2

VALVE_SUPPLY

MTR-5

67/PUR J12-14
EC-H2O WCM PUMP

VALVE_OUTPUT

GND_2

J12-5

13/BLK

J12-6
NO

MTR-6

CB-3
43/ORA

50/TAN
(A)

J12-8

52/BRN
(B)

PUMP

PRESS_IN

J12-9

60/TAN

EC-H2O/FAST PUMP
50/TAN

52/BRN

OPEN_1

COM

13/BLK

SW-10
PRESS NC, OPENS @ 6PSI +/-2PSI = FAULT

J12-1

+ C-1 CAPACITOR, 0.01UF, 200V

OPEN_2

4EA/YEL

J11-4

4EB/YEL

J11-5

OPEN_3

J12-4

EC-H2O MODULE

GND_1

J12-7

CELL_A1
CELL_A2

EC-H2O
CELL

OPEN_4

J12-10
SW-11

6
SWITCHED/FUSED/B+

3EA/ORA J11-3
3EB/ORA J11-6

CELL_B1

FLUSH_GND

CELL_B2

FLUSH_SW

OPT. EC-H2O MODULE HARNESS

J11-1
J11-2

EC-H20 FLUSH SW.
13EA/BLK-WHT
9EA/WHT

EC-H20 MODULE

EC-H2O RELAY

6/BLU

M2A

13/BLK

6/BLU
D-3

SS300 Service Information (3-2017)

GENERAL INFORMATION
OPERATIONAL MATRIX
FUNCTION

ENABLED

DISABLED

Vacuum Fan

• Squeegee Lowered

• Squeegee Raised
• Low Battery Voltage (Wet < 21.9 V, AGM < 22.7 V)
• Fault
• Battery Charger ON Interlock

Main Scrub Motor

• Head Lowered - Foot Pedal
• Fwd/Rev Throttle Command or Bail
activated on non-propel models.

• Head Raised - Foot Pedal
• Neutral - Ready State or bail released on
non-propel models.
• Low Battery Voltage (Wet < 21.9 V, AGM < 22.7 V)
• Fault
• Battery Charger ON Interlock

Propel (drive option)

• Fwd/Rev Throttle Command
• Fwd/Rev Switch Input

• Neutral - Ready State
• Propel Motor Controller Fault
• Battery Charger ON Interlock

Solution Control
(Conventional)

• Head Lowered - Foot Pedal
• Solution Control ON
• Fwd/Rev Throttle Command or Bail
activated on non-propel models.

Solution Control
(ec-H2O NanoClean - option)

• Head Lowered - Foot Pedal
• Solution Control ON
• ecH2O Switch ON
• Fwd/Rev Throttle Command or Bail
activated on non-propel models.

• Head Raised - Foot Pedal
• Solution Control OFF
• Neutral - Ready State or bail released on
non-propel models.
• Low Battery Voltage (Wet < 21.9 V, AGM < 22.7 V)
• Fault
• Battery Charger ON Interlock
• Head Raised - Foot Pedal
• Solution Control OFF
• ecH2O Switch OFF
• Neutral - Ready State or bail released on
non-propel models.
• Low Battery Voltage (Wet < 21.9 V, AGM < 22.7 V)
• ecH2O System Fault
• Battery Charger ON Interlock

MOM001_1

SS300 Service Information (3-2017)

GENERAL INFORMATION
FASTENER TORQUE

SAE (STANDARD)
Thread
Size

SAE
Grade 1

SAE
Grade 2
Carriage
Bolts

Thread
Cutting
Thread
Rolling

SAE
Grade 5
Socket &
Stainless
Steel

SAE
Grade 8

Headless
Square
Socket Set Head Set
Screws
Screws

(5) - (6.5)

(4) - (6)

5 (.125)

(6) - (8)

(9) - (11)

6 (.138)

(7) - (9)

(20) - (24)

(9) - (11)

8 (.164)

(12) - (16)

(40) - (47)

(17) - (23)

10 (.190)

(20) - (26)

(50) - (60)

(31) - (41)

1/4 (.250)

4-5

5-6

7 - 10

10 - 13

6-8

17 - 19

5/16 (.312)

7-9

9 - 12

15 - 20

20 - 26

13 - 15

32 - 38

3/8 (.375)

13 - 17

16 - 21

27 - 35

36 - 47

22 - 26

65 - 75

7/16 (.438)

20 - 26

26 - 34

43 - 56

53 - 76

33 - 39

106 - 124

1/2 (.500)

27 - 35

39 - 51

65 - 85

89 - 116

48 - 56

162 - 188

5/8 (.625)

80 - 104

130 - 170

171 - 265

228 - 383

3/4 (.750)

129 - 168

215 - 280

313 - 407

592 - 688

1 (1.000)

258 - 335

500 - 650

757 - 984

1281 - 1489

Inch Pounds

4 (.112)

Foot Pounds

METRIC
Thread
Size

4.8/5.6

8.8
Stainless Steel

10.9

12.9

Set
Screws

43 - 56 Ncm

99 - 128 Ncm

139 - 180 Ncm

166 - 215 Ncm

61 - 79 Ncm

99 - 128 Ncm

223 - 290 Ncm

316 - 410 Ncm

381 - 495 Ncm

219 - 285 Ncm

193 - 250 Ncm

443 - 575 Ncm

624 - 810 Ncm

747 - 970 Ncm

427 - 554 Ncm

3.3 - 4.3 Nm

7.6 - 9.9 Nm

10.8 - 14 Nm

12.7 - 16.5 Nm

7.5 - 9.8 Nm

8.1 - 10.5 Nm

18.5 - 24 Nm

26.2 - 34 Nm

31 - 40 Nm

18.3 - 23.7 Nm

M10

16 - 21 Nm

37 - 48 Nm

52 - 67 Nm

63 - 81 Nm

M12

28 - 36 Nm

64 - 83 Nm

90 - 117 Nm

108 - 140 Nm

M14

45 - 58 Nm

102 - 132 Nm

142 - 185 Nm

169 - 220 Nm

M16

68 - 88 Nm

154 - 200 Nm

219 - 285 Nm

262 - 340 Nm

M20

132 - 171 Nm

300 - 390 Nm

424 - 550 Nm

508 - 660 Nm

M22

177 - 230 Nm

409 - 530 Nm

574 - 745 Nm

686 - 890 Nm

M24

227 - 295 Nm

520 - 675 Nm

732 - 950 Nm

879 - 1140 Nm

SS300 Service Information (3-2017)

GENERAL INFORMATION
GENERAL MACHINE DIMENSIONS/CAPACITIES/PERFORMANCE
MODEL

17 in / 43 cm Disk
(Push)

20 in / 50 cm Disk
(Push)

17 in / 43 cm Disk
(Drive)

20 in / 50 cm Disk
(Drive)

Length

51.25 in / 1302 mm

54 in / 1372 mm

51.25 in / 1302 mm

54 in / 1372 mm

Width

21 in / 508 mm

22 in / 559 mm

21 in / 508 mm

22 in / 559 mm

Height

43.1 in / 1095 mm

Weight

220 lb / 98 kg

230 lb / 104 kg

240 lb / 109 kg

Weight (with batteries)

366 lb / 166 kg

376 lb / 171 kg

390 lb / 177 kg

400 lb / 181 kg

GVW

457 lb / 207 kg

467 lb / 212 kg

482 lb / 219 kg

492 lb / 223 kg

Squeegee width

30.4 in / 772 mm

Recovery tank capacity

14 gal / 53 L

Solution tank capacity

11 gal / 42 L

Scrubbing path width

16.9 in / 430 mm

19.9 in/ 505 mm

16.9 in / 430 mm

19.9 in / 505 mm

Down pressure

47 lbs / 21.3 kg

52 lbs / 23.5 kg

47 lbs / 21.3 kg

51 lbs / 23 kg

Dual down pressure

88 lbs / 40 kg

92 lbs / 41.7 kg

86 lbs / 39 kg

90 lbs / 41 kg

Scrubbing speed

Pad assist

200 fpm / 61 mpm

Transport speed

n/a

240 fpm / 73 mpm

Reverse speed

n/a

144 fpm / 44 mpm

Productivity rate - estimated actual

9,340ft2/hr / 868m2/hr

11,208ft2/hr / 1041m2/hr

12,453ft2/hr / 1157m2/hr

14,943ft2/hr / 1,388m2/hr

ec-H2O productivity rate - est. actual

9,668ft2/hr / 898m2/hr

11,602ft2/hr / 1078m2/hr

12,891ft2/hr / 1198m2/hr

15,469ft2/hr / 1,437m2/hr

Aisle turnaround width

52 in / 1321 mm

54.5 in / 1384 mm

52 in / 1321 mm

54.5 in / 1384 mm

Ramp incline for scrubbing

9% maximum

Ramp incline for transporting

21% maximum

Ramp incline for loading - empty tanks

21% maximum

Solution flow rate

Low: 0.15 gpm / 0.57 L/min, Med: 0.35 gpm / 1.3 L/min, High: 0.5 gpm / 1.9 L/min

ec-H2O solution flow rate

Low: 0.12 gpm / 0.45 L/min, Med: 0.25 gpm / 0.94 L/min, High: 0.35 gpm / 1.3 L/min

Brush motor
Propel motor

24 VDC, 1hp / 0.75kW
n/a

n/a

24 VDC, 0.23 hp / 0.175 kW

Vacuum motor

24 VDC, 0.6 hp / 0.47 kW

Water lift

42 in / 1067 mm

ec-H2O solution pump

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

Machine voltage

24 VDC

Battery capacity

2 - 12 V 105AH C/20 Wet, 2-12V 130AH C/20 Wet,
2 - 12V 155AH C/20 Wet, 2 - 12V 140AH C/20 Sealed/AGM

Total power consumption

31.5A nominal

36.5A nominal

34.5A nominal

Battery Charger - on-board

100-240VAC, 50/60Hz, 24 VDC, 13A

Battery Charger - smart off-board

100-240VAC, 50/60Hz, 24 VDC, 13A

Protection grade

39.5A nominal

IPX3

Sound pressure level LpA*

67 dB(A)

Sound uncertainty KpA*

0.8 dB(A)

Sound power level uncertainty LwA uncertainty KwA*

84.3 dB(A)

Machine vibration at hand-arm*

<2.5 m/s2

Ambient operating temperature

Min: 32°F/0°C, Max: 110°F/43°C

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

SS300 Service Information (3-2017)

GENERAL INFORMATION
GENERAL MACHINE DIMENSIONS/CAPACITIES/PERFORMANCE
MODEL

24 in / 60 cm
Dual Disk

20 in / 50 cm
Cylindrical Brush

20 in / 50 cm
Orbital

Length

51.75 in / 1314 mm

50.5 in / 1283 mm

49 in / 1245 mm

Width

26 in / 660 mm

25 in / 635 mm

20.5 in / 521 mm

Height

43.1 in / 1095 mm

Weight

250 lb / 113 kg

255 lb / 216 kg

Weight (with batteries)

410 lb / 186 kg

415 lb / 188 kg

GVW

502 lb / 228 kg

507 lb / 230 kg

Squeegee width

30.4 in / 772 mm

Recovery tank capacity

14 gal / 53 L

Solution tank capacity

11 gal / 42 L

Severe environment tank capacity

0.4 gal / 1.5 L

Scrubbing path width

23.6 in / 600 mm

19.7 in/ 500 mm

19.7 in / 500 mm

Down pressure

57 lbs / 26 kg

53 lbs / 24 kg

63 lbs / 28.5 kg

Dual down pressure

97 lbs / 44 kg

64 lbs / 29 kg

109 lbs / 49.5 kg

Scrubbing speed

200 fpm / 61 mpm

Transport speed

240 fpm / 73 mpm

Reverse speed
Productivity rate - estimated actual

144 fpm / 44 mpm
18,264ft2/hr / 1697m2/hr

14,943ft2/hr / 1388m2/hr

ec-H2O productivity rate - est. actual

18,906ft2/hr / 1756m2/hr

15,469ft2/hr / 1437m2/hr

Aisle turnaround width

53.5 in / 1346 mm

52 in / 1321 mm

49 in / 1245 mm

Ramp incline for scrubbing

9% maximum

Ramp incline for transporting

21% maximum

Ramp incline for loading - empty tanks

21% maximum

Solution flow rate

Low: 0.15 gpm / 0.57 L/min, Med: 0.35 gpm / 1.3 L/min, High: 0.5 gpm / 1.9 L/min

ec-H2O solution flow rate

Low: 0.12 gpm / 0.45 L/min, Med: 0.25 gpm / 0.94 L/min, High: 0.35 gpm / 1.3 L/min

Brush motor

24 VDC, 1hp / 0.75kW

Propel motor

24 VDC, 0.23 hp / 0.175 kW

Vacuum motor

24 VDC, 0.6 hp / 0.47 kW

Water lift

42 in / 1067 mm

Water lift - Quiet Mode

28 in / 711 mm

ec-H2O solution pump

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

Machine voltage

24 VDC

Battery capacity

2 - 12 V 105AH C/20 Wet, 2-12V 130AH C/20 Wet,
2 - 12V 155AH C/20 Wet, 2 - 12V 140AH C/20 Sealed/AGM

Total power consumption

36A nominal

40A nominal

30A nominal

Battery Charger - on-board

100-240VAC, 50/60Hz, 24 VDC, 13A

Battery Charger - smart off-board

100-240VAC, 50/60Hz, 24 VDC, 13A

Protection grade
Sound pressure level LpA*

IPX3
67.7 dB(A)

67 dB(A)

67.5 dB(A)

Sound uncertainty KpA*

0.8 dB(A)

Sound power level uncertainty LwA uncertainty KwA*

83.8 dB(A)

85 dB(A)

83.5 dB(A)

Machine vibration at hand-arm*

<2.5 m/s2

Ambient operating temperature

Min: 32°F/0°C, Max: 110°F/43°C

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

SS300 Service Information (3-2017)

GENERAL INFORMATION

MACHINE DIMENSIONS
SINGLE DISK MODEL

30.4 in
772 mm

43.1 in
1095 mm

51.25 in
1302 mm
17 in / 43 cm
Model
54 in
1372 mm
20 in / 50 cm
Model

20 in
508 mm
17 in / 43 cm
Model
22 in
559 mm
20 in / 50 cm
Model

SS300 Service Information (3-2017)

GENERAL INFORMATION

DUAL DISK MODEL

30.4 in
772 mm

43.1 in
1095 mm

51.25 in
1314 mm

SS300 Service Information (3-2017)

26 in
660 mm

GENERAL INFORMATION

CYLINDRICAL BRUSH MODEL

30.4 in
772 mm

43.1 in
1095 mm

50.5 in
1283 mm

25 in
635 mm

SS300 Service Information (3-2017)

GENERAL INFORMATION

ORBITAL PAD MODEL

30.4 in
772 mm

43.1 in
1095 mm

49 in
1245 mm

SS300 Service Information (3-2017)

20.5 in
521 mm

MAINTENANCE
MAINTENANCE
MAINTENANCE CHART

3
12
1

7
4

9
Person
Resp.

Key

Pad(s)

Check, flip or replace

Brush(es)

Check, clean

Cylindrical Brushes

Check, clean

Recovery tank

Drain, rinse, clean float shut-off screen
and debris tray if equipped

Solution tank

Drain, rinse

Severe environment tank (option)

Check, refill

Squeegee

Clean, check for damage and wear

Batteries

Charge if necessary

Debris trough

Clean

Scrub head skirt

Check for damage and wear

Weekly

Battery cells

Check electrolyte level

Squeegee assembly drip trap reservoir

Check, clean

50 Hours

Cylindrical brushes.

Rotate brushes. Check for wear

Cylindrical scrub head

Clean underside of scrub head

Recovery tank lid seal

Check for wear

Interval
Dailey

Description

Prodecure

Solution tank filter

Clean

100 Hours

Battery watering system (option)

Check hoses for damage and wear

200 Hours

Batteries, terminals and cables

Check and clean

500 Hours

Lower orbital isolators

Replace (4 qty)

750 Hours

Vacuum motor

Replace carbon brushes

1250
Hours

Propel motor

Replace carbon brushes

Brush motor

Replace carbon brushes

Brush belt

Replace belt

SS300 Service Information (3-2017)

MAINTENANCE
MACHINE MAINTENANCE

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

To keep the machine in good working condition, simply
perform the following maintenance procedures.
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and set parking brake if equipped.
FOR SAFETY: When servicing machine wear
personal protection equipment as needed. All
repairs must be performed by trained personnel.
AFTER DAILY USE
1. Drain and rinse out the recovery tank (Fig. 86).
See DRAINING TANKS.

Fig. 86
2. Remove the debris tray and empty (Fig. 87).

Fig. 88
4. Drain and rinse out the solution tank (Fig. 89).

Fig. 89
5. 5. Disk scrub head - Turn pad over or replace
when worn (Fig. 90).

Fig. 87
Fig. 90

SS300 Service Information (3-2017)

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

Fig. 91
6. Click-Quick pad driver/brushes - clean any debris
buildup from hub connection area (Fig. 92).

Fig. 92
7. Wipe the squeegee blades clean. Inspect blades
for wear and damage (Fig. 93). Rotate blade if
worn. See SQUEEGEE BLADE REPLACEMENT.

Fig. 93

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

Fig. 94
9. Clean the outside surface of the machine with an
all purpose cleaner and damp cloth (Fig. 95).

Fig. 95
10. Cylindrical scrub head - Remove and clean debris
trough (Fig. 96).

Fig. 96

SS300 Service Information (3-2017)

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

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

Fig. 97
Fig. 98
2. Remove the drip tray cover from the squeegee
assembly and clean reservoir (Fig. 99).

Fig. 99

SS300 Service Information (3-2017)

MAINTENANCE
AFTER EVERY 50 HOURS OF USE
1. Remove the solution tank filter and clean screen
(Fig. 100). Turn the filter bowl counter-clockwise
to remove. Make sure to drain solution tank before
removing filter.

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

Fig. 103
AFTER EVERY 100 HOURS OF USE
Fig. 100
2. Cylindrical brushes - Rotate brushes from front
to rear (Fig. 101). Replace brushes when they no
longer clean effectively.

If machine is equipped with the optional battery watering system, check the watering hoses and connections for damage and wear (Figure 105). Replace
system if damaged.
FOR SAFETY: When servicing batteries, wear
personal protection equipment as needed. Avoid
contact with battery acid.

Fig. 101
3. Cylindrical scrub head - Remove debris buildup
from underside of scrub head (Fig. 102).
Fig. 104

Fig. 102

SS300 Service Information (3-2017)

MAINTENANCE
ELECTRIC MOTORS

ORBITAL SCRUB HEAD ISOLATORS (LOWER)

Replace motor carbon brushes as indicated. Contacttrained personnel for carbon brush replacement.

FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and set parking brake if equipped.

Carbon Brush Replacement

Hours

Vacuum motor

750

Propel motor (drive model)

1250

Disk brush motor

1250

Cylindrical brush motor

1250

Orbital brsuh motor

1250

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

BELTS
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and set parking brake if equipped.
Replace belts every 1250 hours. Contact trained personnel for belt replacement (Fig. 105).
Cylindrical Brush Drive Belt
Fig. 106

Fig. 105

SS300 Service Information (3-2017)

MAINTENANCE
BATTERIES
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and set parking brake if equipped.

The electrolyte level should be slightly above the
battery plates as shown before charging (Fig. 107).
Add distilled water if low. DO NOT OVERFILL. The
electrolyte will expand and may overflow when charging. After charging, distilled water can be added up to
about 3 mm (0.12 in) below the sight tubes.

The lifetime of the batteries depends on their propermaintenance. To get the most life from the batteries;
• Do not charge the batteries more than once a day
and only after running the machine for a minimum
of 15 minutes.
• Do not leave the batteries partially discharged for
long period of time.
• Only charge the batteries in a well-ventilated area
to prevent gas build up. Charge batteries in areas
with ambient temperatures 80_F / 27_C or less.
• Allow the charger to complete charging the
batteries before re-using the machine.
• Maintain the proper electrolyte levels of flooded
(wet) batteries by checking levels weekly.
Your machine is equipped with either flooded (wet)
lead-acid or maintenance-free batteries supplied by
Tennant.
FOR SAFETY: When servicing machine, keep all
metal objects off batteries. Avoid contact with
battery acid.

Before Charging

After Charging

Fig. 107
NOTE: Make sure the battery caps are in place while
charging. There may be a sulfur smell after charging
batteries. This is normal.

MAINTENANCE-FREE BATTERIES

CHECKING CONNECTIONS / CLEANING

Maintenance-free (Sealed AGM) batteries do not
require watering. Cleaning and other routine maintenance is still required.

After every 200 hours of use, check for loose battery
connections and clean the surface of the batteries, including terminals and cable clamps to prevent battery
corrosion. Use a scrub brush with a strong mixture of
baking soda and water (Fig. 108). Do not remove battery caps when cleaning batteries.

FLOODED (WET) LEAD-ACID BATTERIES
The flooded (wet) lead-acid batteries require routine
watering as described below. Check the battery electrolyte level weekly.

Fig. 108

SS300 Service Information (3-2017)

MAINTENANCE
CHARGING BATTERIES
The charging instructions in this manual are intended
for the battery charger supplied with your machine.
The use of other battery chargers that are not supplied
and approved by Tennant are prohibited.

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

If your machine is equipped with an off-board battery charger refer to the charger’s owners manual for
operating instructions. Contact distributor or Tennant
for battery charger recommendations if machine is not
equipped with charger.
FOR SAFETY: The use of incompatible battery
chargers may damage battery packs and potentially
cause a fire hazard.
IMPORTANT NOTICE: The battery charger is set to
charge the battery type supplied with your machine. If
you choose to change to a different battery type or capacity (i.e. flooded (wet) lead-acid, maintenance-free,
sealed, AGM batteries, etc.), the charger’s charging
profile must be changed to prevent battery damage.
See BATTERY CHARGER SETTINGS.
1. Transport the machine to a well-ventilated area.
WARNING: Batteries emit hydrogen gas.
Explosion or fire can result. Keep sparks and
open flame away when charging.

Fig. 109
For models equipped with off-board chargers, first
connect the charger’s DC cord into the machine’s battery charge receptacle then plug the AC power supply
cord into a properly grounded wall outlet (Fig. 110).
Refer to the off-board battery charger’s owner manual
for operating instructions.
FOR SAFETY: Do not disconnect the off-board
charger’s DC cord from the machine’s receptacle
when the charger is operating. Arcing may result.
If the charger must be interrupted during charging,
Disconnect the AC power supply cord first.

2. Park the machine on a flat, dry surface, turn off
machine and remove key.
FOR SAFETY: When servicing batteries, stop on
level surface, turn off machine, remove key and set
parking brake if equipped.
3. If the machine is equipped with flooded (wet)
leadacid batteries check the battery electrolyte
level weekly before charging. See FLOODED
(WET) LEAD-ACID BATTERIES.
Fig. 110
5. The charger will automatically begin charging and
and shut off when fully charged. The maximum
charging cycle may take up to 6- 12 hours
depending on battery type.

SS300 Service Information (3-2017)

MAINTENANCE
On-board battery charger: The battery discharge
indicator lights will ripple back and forth during the
charging cycle. When all five lights repeatedly flash
two times, the charging cycle is complete (Fig. 111).

SQUEEGEE BLADE REPLACEMENT
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and set parking brake if equipped.
Each squeegee blade has four wiping edges. When
the blades become worn, simply rotate the blades
end-for-end or top-to-bottom for a new wiping edge.
Replace blade if all four edges are worn.

T300e/T300
Fig. 111

1. Remove the squeegee assembly from the
machine.

T300 LCD

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

2. Fully loosen the two outside knobs on squeegee
assembly. This will separate the spring loaded
blade retainer from squeegee frame (Fig. 113).
To loosen the knobs quickly, squeeze the blade
retainer and squeegee frame together.

Fig. 113
Fig. 112

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

Fig. 114

SS300 Service Information (3-2017)

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

ec-H2O NanoClean WATER CONDITIONING
CARTRIDGE REPLACEMENT
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and set parking brake if equipped.
The water conditioning cartridge is required to be
replaced when it reaches its maximum water usage or
expiration time of when the cartridge was activated,
which ever comes first. The control panel will signal a
code when it’s time to replace cartridge.

Fig. 115
5. 5. Squeeze the squeegee frame and blade
retainer together and re-tighten the two outside
knobs (Fig. 116).

Depending on machine usage, on average, a new
cartridge can last anywhere from 12 months for heavy
machine usage to 24 months for light machine usage.
ATTENTION: During first time use and after
replacing the water conditioning cartridge, the
ec-H2O system will automatically override the
selected solution flow rate for up to 75 minutes.
1. Park the machine on a level surface, remove the
key and set parking brake, if equipped.
2. Lift the recovery tank to access the ec-H2O water
conditioning cartridge (Fig. 117). Drain recovery
tank before lifting tank.

Fig. 116

Fig. 117

SS300 Service Information (3-2017)

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

Gray
Collar

Carefully read and understand all steps first before
performing procedure.
A. Turn key on.
B. Press and hold the service switch, located on the
ec-H2O module, for 10 seconds. After releasing
service switch, the three solution flow indicator
lights will begin to (ripple) move back and forth
(Figure 129).
C. Within 5 seconds after releasing the service
switch, while the three indicator lights are moving
back and forth, quickly press and release the
solution flow button located on ec-H2O module
(Fig. 120). The three indicator lights will then
blink three times to indicate timer has been reset.
Repeat process if the three

Fig. 118
Service switch

3 indicator lights

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

Solution flow button

Fig. 120
LOADING/UNLOADING MACHINE FOR
TRANSPORTING
Fig. 119
5. Install the new cartridge and reconnect the two
hoses. Make sure the hose connectors are fully
inserted into the cartridge.

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

6. Reset timer for new cartridge.

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

SS300 Service Information (3-2017)

MAINTENANCE
FOR SAFETY: When loading/unloading machine
onto/off truck or trailer, use a ramp that can
support the machine weight and operator.
FOR SAFETY: Do not operate the machine on a
ramp incline that exceeds a 21% grade level.

STORING MACHINE
The following steps should be taken when storing the
machine for extended periods of time.
1. Charge the batteries before storing machine to
prolong the life of the batteries. Recharge batteries
every 3 months.
2. Drain and rinse recovery tank and solution tank.
3. Store the machine in a dry area with squeegee
and scrub head in the up position.
ATTENTION: Do not expose machine to rain, store
indoors.
4. 4. Open the recovery tank lid to promote
aircirculation.

Fig. 121
3. Once loaded, position the front of the machine up
against the front of the trailer or truck. Lower the
scrub head, turn key off and set parking brake, if
equipped (Figure 131).
4. Place a block behind each wheel (Figure 131).
5. Using tie-down straps, secure the machine using
the four tie-down brackets located on the machine
frame (Figure 131). It may be necessary to install
tie-down brackets to the floor of your trailer or
truck.
ATTENTION: Do not use control console area or
accessory storage rails for tie-down locations,
damage may occur.

NOTE: To prevent potential machine damage
storemachine in a rodent and insect free environment.
FREEZE PROTECTION
Storing machine in freezing temperatures.
1. Completely drain solution tank and recovery tank.
2. Empty the water from the solution tank filter
located under machine. Replace filter.
3. Pour 1 gallon / 4 liters of propylene glycol based
recreational vehicle (RV) antifreeze into the
solution tank.
Models equipped with optional Severe Environment
detergent tank - Lift out the tank and empty the
detergent from tank. Pour a 1/4 gallon / 1 liter of
propylene glycol based recreational vehicle (RV)
antifreeze into the detergent tank.
4. Turn machine on and operate the solution flow
system. Turn the machine off when the antifreeze
is visible on floor.
Models equipped with ec-H2O option - Operate ecH2O scrubbing to cycle antifreeze through system.

Fig. 122

Models equipped with Severe Environment mode option - Press the Severe Environment button to cycle
antifreeze through system.
5.

SS300 Service Information (3-2017)

After storing machine in freezing temperatures,
drain any remaining antifreeze from the solution
tank and from the optional Severe Environment
detergent tank. Add clean water to solution tank
and to optional detergent tank and operate the
machine to flush system.
35

TROUBLESHOOTING
TROUBLESHOOTING
FAULTS
Machine faults are displayed three different ways
depending on the machine configuration:
Machines equipped with a membrane panel display
faults using the BDI (Battery Discharge Indicator). If
a fault is present, the BDI displays a combination of
flashing and steady LEDs, which can be interpreted
using the tables below.
Machines equipped with the optional LCD panel offer
additional fault detail. Note that in the table below
some BDI faults correlate to several LCD fault codes
that are more specfic as to the circuit causing the fault.
A Service Diagnostics tool is available to provide additional fault detail. See “SERVICE DIAGNOSTICS
TOOL in the SERVICE section of this manual.
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

0x0010

Parking Brake

Flashing indicator alerts that manual
parking brake is engaged on wheel.

Release parking brake.

☼☼☼☼☼

E-Stop activate
fault

1. E-Stop pressed.
2. Large white iDrive connector
unplugged.
3. Large white iDrive connector pin 7
disconnected.
4. IDrive power wire unplugged.
5. Scrub controller board connector J9
pin 2 disconnected.
6. Scrub controller board connector J8
unplugged.
7. Scrub controller board connector J8
pin 7 disconnected.

1. Key off machine.
2. Press and reset E-Stop
button.
3. Key on machine.
4. If fault persists, check
harness connections between
E-Stop and control module.
5. Replace or repair harness.
6. Replace E-Stop.

●●●☼●

0x0201

Actuator Open
Warning

Wiring, connector, or control board
issue on actuator.

Check connectors and
connector pins.

●●●☼☼

0x0101

Scrub Motor
Open
Warning

1. Wiring, connector or control board
issue on scrub motor.
2. J10 connector on scrub
controller board unplugged.
3. Scrub controller board power
disconnected.
4. Scrub controller inline power fuse
defective/blown.
5. Scrub controller board problem.

Check connections. Board gets
power from key switch and
battery. If connections are good,
replace control board.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

☼☼☼☼●

0x0102

Voltage/Power
Loss

1. Scrub controller board not
detecting power.
2. Intermittent control board power
loss.

Check wiring. Inline fuse may
be blown or bad. Replace inline
fuse.

●☼●●☼

0x0301

Valve Open
Warning

1. Wiring, connector or control board
issue with the valve.
2. Scrub Controller board connector
J8 pin 2 disconnected

Check connections/wiring.

●☼●☼☼

0x0303

Valve Over
Current Fault

1. Valve connections shorted.
2. Faulty valve.
3. Scrub Controller board damaged.

Check connections and wiring.
Check valve. Replace controller
board.

☼●☼☼●

0x0307

Valve FET Fault

1. Control board problem.
2. Power/battery issue on startup.

Replace control board.

●●☼●●

0x0501

Vacuum Motor
Open Warning

1. Wiring, connector or control board
issue on the vacuum.
2. J10 connector on Scrub
Controller board unplugged.
3. Scrub Controller board power
disconnected.
4. Scrub Controller inline power fuse
defective/blown.

Check connections and wiring.
Board gets power from key
switch and battery. Replace
defective/blown inline power
fuse.

●●☼●☼

0x0601

Detergent Pump
Open Warning

1. Wiring, connector or control board
Check connections/wiring.
issue on the detergent pump.
2. Detergent pot connector unplugged.
3. Detergent pot connector Pin 5 or 6
disconnected.
4. Scrub Controller board J8 pin 1 or 6
disconnected.

●●☼☼●

0x0910

Propel Breaker
Tripped Fault

1. Issue with propel motor, wiring or
the I-Drive module.
2. Large white iDrive connector
unplugged.
3. Large white iDrive connector pin 7
disconnected.
4. iDrive power wire unplugged.
5. Scrub Controller board connector
J9 unplugged and bail activated.
6. Scrub Controller board connector
J9 pin 7 disconnected.

Disconnect battery and reset
the circuit breaker. Check
connections/wiring.

●●☼☼☼

0x0901

Propel Motor
Open
Warning

1. Controller detects motor has
become disconnected at start-up or in
standby.

Check motor, connectors, and
relevant wiring to controller. If
trip is still present after motor,
connectors, and wiring have
been checked, controller may
be defective. Replace controller.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

☼●●●☼

0x0900

Propel Generic
Fault

1. Generic iDrive fault.
2. Large white iDrive connector pin 2,
8, or 9 disconnected.
3. User Interface speed pot connector
unplugged.

Power cycle machine. Check
connections/wiring.

0x0903

Propel
Communication
Lost Warning

1. Large white iDrive connector pin 5
disconnected.
2. Small white iDrive connector
unplugged.
3. Small white iDrive connector pin 3
or 4 disconnected.
4. Scrub controller board connector J2
or J8 unplugged.
5. Scrub controller board J9 pin 1 or 2
disconnected.
6. Scrub controller board J8 pin 7
disconnected.
7. Smaller of two console connectors
unplugged.
8. User Interface board connector J4
or J9 unplugged.

Power cycle machine. Check
connections/wiring.

0x0904

Propel Power
Cycle Needed

1. iDrive just programmed by service
tech with new parameters.
2. iDrive unit is faulty.

Power cycle machine. Replace
iDrive.

0x0905

Propel Current
Limit Fault

1. Controller detects motor is drawing
excessive current.

Check motor, connectors, and
relevant wiring to controller. If
trip is still present after motor,
connectors, and wiring have
been checked, the controller
may be defective. Replace
controller.

0x0908

Propel RAM
Check Error

iDrive unit is faulty.

Replace iDrive.

0x0909

Propel Data
Check Error

iDrive unit is faulty.

Replace iDrive.

0x090A

Propel Tiller Low
Reference

Controller detects Throttle Low
Reference is outside of normal range.
Throttle Low Reference is located on
pin 8 of 14-way Tiller Connector.

Check throttle potentiometer,
connectors, and relevant wiring
to controller. If trip is still present
after potentiometer, connectors,
and wiring have been checked,
controller may be defective.
Replace controller.

0x090B

Propel Gone to
Sleep

Controller enters Sleep Mode.

Turn controller off and then
on to wake system. To
disable Sleep Mode, program
parameter Sleep Timer to 0
minutes.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

☼●●●☼

0x090C

Propel EEPROM
Write Error

iDrive unit is faulty.

Replace iDrive.

0x090D

Propel EEPROM
Write Timeout

iDrive unit is faulty.

Replace iDrive.

0x090E

Propel EEPROM
Busy at Startup

iDrive unit is faulty.

Replace iDrive.

0x090F

Propel EEPROM
Address Range

iDrive unit is faulty.

Replace iDrive.

0x0911

Propel Forward
ISO Test Fail

Controller detects Series Speed Limit
Potentiometer Wiper is shorted to one
of throttle references, either high or
low. Series Speed Limit Potentiometer
Wiper input is located on pin 1 of 14way Tiller Connector.

Trip is only applicable if an
ISO-test resistor is fitted
and programmed correctly.
Check throttle potentiometer,
programming, connectors, and
relevant wiring to controller.
If trip is still present after
potentiometer, programming,
connectors, and wiring have
been checked, controller may
be defective. Replace controller.

0x0912

Propel Forward
Input Range

Controller detects an error with
Throttle Wiper. Throttle Wiper input
is located on pin 1 of 14-way Tiller
Connector.

Check throttle potentiometer,
programming, connectors, and
relevant wiring to controller.
If trip is still present after
potentiometer, programming,
connectors, and wiring have
been checked, controller may
be defective. Replace controller.

0x0913

Propel Joystick
Error Right 2

iDrive unit is faulty.

Replace iDrive.

0x0914

Propel Solenoid
Brake

Controller detects a short circuit in
solenoid brake.

Check solenoid brake,
connectors and relevant wiring
to controller. If trip is still present
after brake, connectors, and
wiring have been checked,
controller may be defective.
Replace controller.

0x0915

Propel Brake
Status Low

iDrive unit is faulty.

Replace iDrive.

0x0916

Propel Brake Not Controller detects an open circuit
Connected
in solenoid brake at start-up or in
standby.

SS300 Service Information (3-2017)

Check solenoid brake,
connectors, and relevant wiring
to controller. If trip is still present
after brake, connectors, and
wiring have been checked,
controller may be defective.
Replace controller.

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

☼●●●☼

0x0917

Propel Brake
Interlock Fault

iDrive unit is faulty.

Replace iDrive.

0x0918

Propel Relay
Interlock Fault

iDrive unit is faulty.

Replace iDrive.

0x0919

Propel Relay
Stuck Closed

iDrive unit is faulty.

Replace iDrive.

0x091A

Propel Relay Coil iDrive unit is faulty.
Voltage

Replace iDrive.

0x091B

Propel Watchdog iDrive unit is faulty.
Tripped

Replace iDrive.

0x091C

Propel Positive
Current
Feedback Null

iDrive unit is faulty.

Replace iDrive.

0x091D

Propel Positive
Current
Feedback Out of
Range

iDrive unit is faulty.

Replace iDrive.

0x091E

Propel Negative
Current
Feedback Null

iDrive unit is faulty.

Replace iDrive.

0x091F

Propel Negative
Current
Feedback Out of
Range

iDrive unit is faulty.

Replace iDrive.

0x0920

Propel Speed
Control Wiper
Warning

Controller detects Parallel Speed Limit
Potentiometer Wiper is open circuit or
has been shorted to one of the throttle
references. Parallel Speed Limit
Potentiometer Wiper input is located
on pin 9 of 14-way Tiller Connector.

1. Check wiring to speed control
potentiometer.
2. Power cycle machine.
3. If warning persists, replace
speed control potentiometer.
4. Test high and low speed
functions.

0x0921

Propel Speed
Control
Reference

1. Propel speed control reference
incorrect.

Check wiring to speed control
potentiometer. Power cycle
machine.

0x0922

Propel Throttle
Trip Reference
Warning

1. Propel throttle trip reference
incorrect.

Check wiring to the bail sensor.
Power cycle machine.

0x0923

Propel High
Battery Voltage
Warning

Controller detects battery voltage has
exceeded approximately 35V on 24V
controllers and approximately 45V on
36V controllers.

Check condition of batteries,
connectors, and relevant wiring
to controller. If trip is still present
after batteries, connectors, and
wiring have been checked,
controller may be defective.
Replace controller.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

☼●●●☼

0x0924

Propel High
Controller detects battery voltage has
Battery Voltage 2 exceeded approximately 45V on 24V
Warning
controllers and approximately 49.5V
on 36V controllers.

Check condition of batteries,
connectors, and relevant wiring
to controller. If trip is still present
after the batteries, connectors,
and wiring have been checked,
controller may be defective.
Replace controller.

0x0925

Propel Inhibit 1
Warning

Controller detects Inhibit 1 input is
active, Inhibit 1 Speed has been set
to ‘0’ and Inhibit 1 Operation has been
set to ‘Latched’.

Check state of input, Inhibit 1
programming, connectors, and
relevant wiring to controller. If
trip is still present after state of
input, programming, connectors,
and wiring have been checked,
controller may be defective.
Replace controller.

0x0926

Propel Inhibit 2
Warning

Controller detects Inhibit 2 input is
active, Inhibit 2 Speed has been set
to ‘0’ and Inhibit 2 Operation has been
set to ‘Latched’.

Check state of input, Inhibit 2
programming, connectors, and
relevant wiring to controller. If
trip is still present after state
of the input, programming,
connectors, and wiring have
been checked, controller may
be defective. Replace controller.

0x0927

Propel Inhibit 3
Warning

Controller detects Inhibit 3 input is
active, Inhibit 3 Speed has been set
to ‘0’ and Inhibit 3 Operation has been
set to ‘Latched’.

Check state of input, Inhibit 3
programming, connectors, and
relevant wiring to controller. If
trip is still present after state
of the input, programming,
connectors, and wiring have
been checked, controller may
be defective. Replace controller.

0x0928

Propel Watchdog 1. Propel controller watchdog tripped.
Warning

Power cycle machine.

0x0929

Propel Bad
Setting Warning

1. Bad setting programmed to iDrive.

Reprogram iDrive.

0x092A

Propel Direction
Inputs Disagree

iDrive unit is faulty.

Replace iDrive.

0x092B

Propel Positive
Feedback
Voltage Null

iDrive unit is faulty.

Replace iDrive.

0x092C

Propel Positive
Feedback
Voltage Out of
Range

iDrive unit is faulty.

Replace iDrive.

SS300 Service Information (3-2017)

Reason

Correction

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

☼●●●☼

0x092D

Propel Output
Voltage Tracking

iDrive unit is faulty.

Replace iDrive.

0x092E

Propel Negative
Feedback
Voltage Null

iDrive unit is faulty.

Replace iDrive.

0x092F

Propel Negative
Feedback
Voltage Out of
Range

iDrive unit is faulty.

Replace iDrive.

0x0930

Propel ROM
Check Warning

1. The iDrive memory is corrupted.
iDrive damaged.

Replace iDrive.

0x0931

Propel EEPROM
Check Warning

1. The iDrive settings are corrupted.
iDrive damaged.

Replace iDrive.

0x0932

Propel Internal
12V Error

1. The iDrive hardware is damaged.

Replace iDrive.

0x0933

Propel Low
Battery

Controller detects battery voltage has
fallen below approximately 13.5V.

0x0934

Propel Very Low
Battery

Controller detects a sudden drop in
battery voltage.

0x0935

Propel Out of
Time

iDrive unit is faulty.

Replace iDrive.

0x0936

Propel Low
Bridge Voltage

Power surge on propel module inputs
causing damage to iDrive circuitry.

Replace iDrive.

0x0937

Propel Bridge
Voltage Greater
Then Battery

iDrive unit is faulty.

Replace iDrive.

0x0938

Propel Stack
Overflow

iDrive unit is faulty.

Replace iDrive.

0x0939

Propel Illegal
State

iDrive unit is faulty.

Replace iDrive.

0x093A

Propel Trip
Sense Active

iDrive unit is faulty.

Replace iDrive.

0x093B

Propel Trip
iDrive unit is faulty.
Sense Not Active

Replace iDrive.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

☼●●●☼

0x093C

Propel Trip Latch
Not Armed

iDrive unit is faulty.

Replace iDrive.

0x093D

Propel Failed To
Arm Trip Latch

iDrive unit is faulty.

Replace iDrive.

0x093E

Propel Trip
Latch Became
Unarmed

iDrive unit is faulty.

Replace iDrive.

0x093F

Propel Left Motor iDrive unit is faulty.
Shorted Low

Replace iDrive.

0x0940

Propel Controller
Fault

Each time controller trips with a
suspected controller error, it records
one instance of code ‘4401’ in
controller System Log. Actual
controller trip code is also recorded
in controller Control Log. Number
of ‘4401’ trips shown in System Log
should equal cumulative number of
trip occurrences shown in Control Log.

If controller continues to trip
after batteries, connectors, and
wiring have been checked,
controller may be defective.
Replace controller.

0x0941

Propel Soft Belly
Button Active

Controller detects Belly Button Switch
has been operated at power-up.

Check Belly Button Switch,
connectors, and relevant wiring
to controller. If trip is still present
after switch, connectors, and
wiring have been checked,
controller may be defective.
Replace controller.

0x0942

Propel Internal
Temperature
Sensor

iDrive unit is faulty.

Replace iDrive.

0x0906

Propel Motor
Short Low Fault

Controller detects motor wiring has
been shorted to Battery Negative.

Check motor, connectors, and
relevant wiring to controller. If
trip is still present after motor,
connectors, and wiring have
been checked, controller may
be defective. Replace controller.

0x0907

Propel Motor
Short High Fault

Controller detects motor wiring has
been shorted to Battery Positive.

Check motor, connectors, and
relevant wiring to controller. If
trip is still present after motor,
connectors, and wiring have
been checked, controller may
be defective. Replace controller.

☼●●☼●

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

☼●●☼☼

0x0103

Scrub Motor
Over Current
Fault

1. Current draw higher than expected.
2. Higher current draw than hardware
design limit.

Verify floor, pad, and down
pressure combination are
appropriate for machine.
Check actuator.

0x0104

Scrub Motor
Over Current 1
Fault

1. Current draw higher than expected.

Verify floor, pad, and down
pressure combination are
appropriate for machine.
Check actuator.

0x0105

Scrub Motor
Over Current 2
Fault

1. Current draw higher than expected.

Verify floor, pad, and down
pressure combination are
appropriate for machine.
Check actuator.

☼●☼●☼

0x0902

Propel High
Throttle Fault

1. Bail is activated before turning on
machine.
2. Bail did not release to full rest
position due to obstruction.
Controller detects Throttle
Potentiometer has been displaced
at start-up and parameter Throttle
Operated At Power-Up has been set
to ‘Trip’.

1. Release bail.
2. Key off and on.
3. If error persists, check for
obstruction or damaged bail
switch.
4. Replace switch or bail handle
if damaged.

☼●☼☼●

0x0107

Scrub Motor FET 1. Power/battery issue on startup.
Fault
2. Control board problem.

1. Check harness/module
power and ground connections.
2. Replace Control board.

0x0207

Actuator FET
Fault

1. Control board problem.
2. Power/battery issue on startup.

Replace control board. FET
detection includes motor,
actuator, detergent pump,
vacuum, and battery watering
pump.

0x0507

Vacuum FET
Fault

1. Control board problem.
2. Power/battery issue on startup.

Replace control board. FET
detection includes motor,
actuator, detergent pump,
vacuum, and battery watering
pump.

0x0607

Detergent Pump
FET Fault

1. Control board problem.
2. Power/battery issue on startup.

Replace control board. FET
detection includes motor,
actuator, detergent pump,
vacuum, and battery watering
pump.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

☼●☼☼☼

0x0503

Vacuum Over
Current Fault

1. Current draw higher than expected.

Check harness and vacuum.

0x0504

Vacuum Over
Current 1 Fault

1. Current draw higher than expected.

Verify vacuum load, damage,
and/or usage conditions

0x0505

Vacuum Over
Current 2 Fault

1. Current draw higher than expected.

Verify vacuum load, damage,
and/or usage conditions.

☼☼●●●

0x0506

Vacuum Shorted
Load Fault

1. Shorted load condition.
2. Some higher current draw than
hardware design limit.

1. Check harness for damage
or short between motor and
control module.
2. Repair or replace harness if
damaged.
3. Check for obstruction in
vacuum fan assembly.
4. If not spinning freely, replace
vacuum fan.

☼☼●●☼

0x0603

Detergent Pump
Over Current
Fault

1. Current draw higher than expected.

Check harness and pump.

0x0604

Detergent Pump
Over Current 2
Fault

1. Current draw higher than expected.

Verify detergent pump load,
damage, and/or usage
conditions

0x0605

Detergent Pump
Over Current 1
Fault

1. Current draw higher than expected.

Verify detergent pump load,
damage, and/or usage
conditions.

☼☼●☼●

0x0606

Detergent Pump
Shorted Load
Fault

1. Shorted load condition.
2. Higher current draw than hardware
design limit.

Check harness, pump, and
control boards.

☼☼☼●☼

0x0106

Scrub Motor
Short Fault

1. Shorted load condition.
2. Higher current draw than hardware
design limit.

Check wire harness. Repair as
necessary.

●☼☼☼●

0xF103

Charger CAN
Communication
Fault

1. Control boards are not
communicating properly.
2. Board lost power (wiring issue).
3. Control board may be damaged.

1. Power cycle machine.
2. No communication with a
network module. Use CANopen
troubleshooting techniques.

0xFF20

Scrub
Controller CAN
Communication
Fault

1. Control boards are not
communicating properly.
2. Board lost power (wiring issue).
3. Control board may be damaged.

1. Power cycle machine.
2. No communication with a
network module. Use CANopen
troubleshooting techniques.

0x0704

EC-H2O CAN
Communication
Fault

1. Control boards are not
communicating properly.
2. Board lost power (wiring issue).
3. Control board may be damaged.
4. ecH2O connector unplugged (never
plugged in).
5. ecH2O connector pin 2 or 3
disconnected.
6. ecH2O connector power pin
disconnected.

1. Power cycle machine.
2. No communication with a
network module.
3. Check connections.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
BDI (Battery
Discharge
Indicator)
☼ = Flashing

Pro-Panel
LCD
Faults
(Option)

Fault Condition

Reason

Correction

☼☼☼●●

0xF100

Charger Generic
Warning

1. Error condition has occurred with
charger unit.

Replace charger.

●☼☼●●

0xF101

Charger No Load 1. Battery pack may not be plugged
Warning
into charger.
2. Charger is bad.

1. Verify batteries are connected
properly.
2. Verify wire harness continuity.
3. Replace charger.

●☼●●●

0xF102

Charger
Overheat
Warning

1. Charger environment is not cool
enough and cannot complete charge.
2. Charger is faulty.

1. Move machine to wellventilated area.
2. Replace charger

●☼☼●☼

0xF104

Charger Timer
Phase I Warning

1. Batteries not charging correctly.

Check for low battery voltage.

☼●☼●●

0x0703

EC-H2O Breaker
Tripped Warning

1. Detected module circuit breaker
trip.
2. Scrub Controller board J4
connector unplugged.
3. Scrub Controller board J4
connector pin 2 disconnected.

Power cycle machine. Check
connections.

0x0712

EC-H2O Pump
Breaker Tripped
Warning

1. Detected module circuit breaker
trip.
2. Scrub Controller board J4
connector unplugged.
3. Scrub Controller board J4
connector pin 1 disconnected.

Power cycle machine. Check
connections.

●☼●☼●

0x0711

EC-H2O Pump
Open Warning

1. Wiring, connector, or control board
issue on ec-H2O pump.

Control board is not detecting
pump current. Check
connections for voltage and
verify pump is operating.

●☼☼☼☼

0x0713

EC-H2O Pump
Over Current
Warning

1. Current draw higher than expected.

Check pump operating current.

0x0717

EC-H2O Control
board failure /
damage

1. EC Module control board is
damaged.

Replace the NanoClean
Controller kit.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
Icon

Code

Fault Condition

Reason

Correction

0x0702

EC-H2O
Pressure Switch
Active

The system pressure switch is
detecting a trip or unconnected.

1. System pressure too high;
needs repair.
2. Check connections. Verify
functionality of scrub head
switch and parking brake switch.
Connectors possibly wired to
incorrect switches.

0x0704

EC-H2O CAN
Communication
Fault

1. Board lost power or CAN
connection (wiring issue).
2. ec-H2O board may be damaged.
3. ec-H2O connector unplugged.
4. ec-H2O connector pin 2 or 3
disconnected.

1. Power cycle machine.
2. No communication with a
network module.
3. Check connections/wiring.

0x0708

EC-H2O System
Over Regulation
Warning

Cell has operated over target
current condition for last 50 treated
gallons.

Check water condition in solution
tank for presence of detergents.

0x0711

EC-H2O Pump
Open Fault

Wiring, connector, or control board
issue on ec-H2O pump.

Control board is not detecting
pump current. Check connections
for voltage and verify pump is
operating.

0x0713

EC-H2O Pump
Over Current
Fault

Current draw higher than expected.

Check pump operating current.

0x0716

EC-H2O Pump
Short Fault

1. Shorted load condition.
2. Some higher current draw than
hardware design limit.

Check EC-H2o pump and
harness

0x717

EC-H2O FET
Faults

1. Power/battery issue on startup.
2. Control board problem/damage.

1. Check harness power and
ground connections.
2. Replace EC water NanoClean
Controller kit.

0x0721

EC-H2O Cell
Open Warning

Wiring, connector, or control board
issue on the EC-H2O cell.

Refer to EC-H2O NanoClean
troubleshooting guide or contact
Tennant Technical Support

0x0723

EC-H2O Cell
Over Current
Warning

Current draw higher than expected.

Refer to EC-H2O NanoClean
troubleshooting guide or contact
Tennant Technical Support

0x0726

EC-H2O Cell
Short Warning

1. Shorted load condition.
2. Some higher current draw than
hardware design limit.

Refer to EC-H2O NanoClean
troubleshooting guide or contact
Tennant Technical Support

0x0727

EC-H2O Cell
FET Faults

1. Control board problem.
2. Power/battery issue on startup.

Replace control board. FET
detection includes motor,
actuator, detergent pump,
vacuum, and battery watering
pump.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS (Cont’d)
Icon

Code

Fault Condition

Reason

Correction

0x072A

EC-H2O Cell
Electrode Fault

Cell current is operating below
allowed operating condition.

See the NanoClean
troubleshooting guide. Replace
plumbing half of ec-H2O module.

0x0726

EC-H2O E-Cell
Short load Fault

1. Module damage.
2. Metal debris inside e-call
3. Electronic event

Repair harness if possible.
Replace EC-H2O NanoClean
Module plumbing kit.
Replace EC-H2O NanoClean
controller kit.

0x0741

EC-H2O WCM
Pump Open
Warning

Wiring, connector or control board
issue on ec-H2O pump.

Check if Water Conditioning
Module micro pump is connected
to machine harness and verify
pump is operable.

0x0746

EC-H2O WCM
Pump Short
Warning

1. Shorted load condition.
2. Some higher current draw than
hardware design limit.

Check harness and verify Water
Conditioning Module micro pump
is operable.

0x0747

EC-H2O WCM
Pump FET Fault

1. Control board problem.
2. Power/battery issue on startup.

Replace control board. FET
detection includes motor,
actuator, detergent pump,
vacuum, and battery watering
pump.

0x0781

Detergent Tank
Empty

1. Flashing icon indicates detergent
tank level is too low to operate
correctly.
2. Detergent tank switch connector
unplugged.
3. Scrub Controller connector J4
unplugged.
4. Scrub Controller connector J4
pin 4 disconnected.

Refill detergent tank to clear
indicator. If fault persists, check
connections/wiring.

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAULTS - OFF BOARD BATTERY CHARGER
ERROR CODE

REASON

Srt:IB
IBmax

Output current has exceeded nominal cur- Ensure there are no short circuits on battery or battery cables or there is an active
rent value by more than 10%.
load on battery that draws more currant
than charger can provide.

E01:Open
Circuit

Current suddenly went to zero unexpectedly.

Check connection of clamps to battery
and check voltage of battery elements to
ensure there are no elements in an open
circuit condition. Charger starts again
after 5 seconds.

E02:
Temperature

Internal thermic sensor has detected high
temperature.

Operate charger in a well ventilated area.

E03: Timer

Safety timer of one of the phases has
been activated.

Ensure charging current is set suitably for
battery capacity and that selected voltage corresponds to battery voltage. Also,
ensure that there are no elements in short
circuit and that battery is not sulphated.

SS300 Service Information (3-2017)

CORRECTION

TROUBLESHOOTING
TROUBLESHOOTING
FAULT CONDITION

REASON

CORRECTION

Hour Meter Not Powered

1. Hour meter wires disconnected.
2. Scrub Controller board connector J8 pin 9
disconnected.

Check connections/wiring.

Bail Not Responding

1. Bail sensor is unplugged.
2. User Interface board defective.

Check connections. Replace user
interface board.

Parking Brake Always
Reporting Disengaged

1. Parking brake switch disconnected.
2. Faulty wiring.
3. Scrub Controller board connector J4 pin 6
disconnected.

Check connections/wiring. Verify
functionality of parking brake switch and
ecH2O pressure switch. Connectors
possibly wired to incorrect switches.

Scrub Head Switch Not
Functioning

1. Scrub Head switch disconnected.
2. Faulty wiring.
3. Scrub Controller board connector J4 pin 5
disconnected.
4. Scrub Controller board connector J9 pin 3
disconnected.

Check connections/wiring. Verify
functionality of scrub head switch and
ecH2O pressure switch. Connectors
possibly wired to incorrect switches.

Vacuum Squeegee Switch
Not Functioning

1. Vacuum squeegee switch disconnected.
2. Faulty wiring.
3. Scrub Controller board connector J4 pin 7
disconnected.

Check connections. Verify functionality
of vacuum squeegee switch and ecH2O
pressure switch. Connectors possibly
wired to incorrect switches.

Reverse Switch Not Working

1. Reverse switch connector unplugged.
2. Large white iDrive connector pin 12 or 13
disconnected.

Check connections/wiring.

No Propel Response (no
faults reporting)

1. Propel Motor lead unplugged.
2. Large white iDrive connector pin 1
disconnected.
3. Bail sensor is unplugged.

Check connections/wiring.

Scrub Head Not Spinning

This fault is looked up most often on a nonpropel machine and no fault is reported by
machine.

Verify bail switch is properly connected.

No Charge Mode LEDs

User Interface board is not receiving power from
charger at J7-9.

Ensure pin connections between UI and
charger connectors are not broken or
unseated.

SS300 Service Information (3-2017)

TROUBLESHOOTING

SS300 Service Information (3-2017)

TROUBLESHOOTING
ONBOARD BATTERY CHARGING ON (Option)

(2) 12VDC Batteries
+

12 Volt

1/RED
Onboard Battery Charger
CB1
4A

BLACK Cable

B-

7/PUR
4/YEL

P2-3 COM

N.O. P2-4

6/BLU
5/GRN

N.C. P2-2
1/RED

Key
Switch

B+

J7-9 Interface
Module
J7-10, J7-7
Interface
Module

M1A
ec-H2O Relay
(option)

AC Power Cord
J8-7
Machine Control
Module (option)

Battery Positive +
Battery Negative -

CAN +

AC Volts
CAN CAN GROUND

P2-6

YEL

P2-10

GRN

P2-1

113/BLK/WHT

CAN-bus +
CAN-bus J3-3 Interface
Module

PMC021

SS300 Service Information (3-2017)

TROUBLESHOOTING
BATTERIES FAILED TO CHARGE/ REDUCED RUN TIME (ONBOARD CHARGER)
STEP

ACTION

•
•

YES

Key On
Is there a flashing BDI fault or LCD Pro-Panel
(option) fault code present?

See “Faults” in
the TROUBLESHOOTING
section of this
manual

Go to Step #2

•
•
•

Key Off
Check AC power supply
Is the rated AC supply voltage present?

Go to Step #3

Check AC
Supply Circuit
Protection

•

See BATTERY CHARGER SETTINGS in the
SERVICE section of this manual and confirm
proper charger settings
Is the onboard charger set properly?

Go to Step #4

Reprogram
battery charger

Repair or Replace Battery
and/or Charger
Cables

Go to Step #5

•

Key Off
Inspect battery and charger cables for damage,
corrosion, contamination or terminal problems
Do any of the above conditions exist?

•
•
•
•
•

Skip this step for sealed or AGM batteries
Key Off
Disconnect batteries
Check water level of all battery cells
Are the lead plates submerged?

Go to Step #6

Add Distilled
Water Until
Lead Plates
are Covered.

•
•
•
•

Key Off
Load test all batteries (AGM or Lead-Acid)
-orTest specific gravity of each cell using a hydrometer or refractometer (Lead-Acid)
Do the batteries pass a load test or are all battery cells within 0.050 (50 points) specific gravity of each other?

Replace Battery Replace BatCharger
tery or Batteries

•
4

•
•

•

VALUE(S)

Terms:
AC = Alternating Current
AGM = Absorbed Glass Mat
Specific Gravity = Relative density of a substance compared to water (1.000 specific gravity)

SS300 Service Information (3-2017)

TROUBLESHOOTING
OFF BOARD BATTERY CHARGING ON (OPTION)

(2) 12 VDC Batteries
+

12 Volt

1/RED
Battery Charger Connector

CB1
4A

N.O.
4/YEL

COM

N.C.

Battery Charger
Interlock Switch

Not Used
5/GRN

6/BLU
Key
Switch

J7-10, J7-7
Interface
Module

M1A
ec-H2O Relay
(option)

J8-7
Machine Control
Module (option)

Battery Positive +
Battery Negative -

PMC021

SS300 Service Information (3-2017)

TROUBLESHOOTING
BATTERIES FAILED TO CHARGE/ REDUCED RUN TIME (OFF BOARD CHARGER)
STEP

ACTION

•
•

Key On
Is there an LCD fault present on the Off Board
Charger?

See “Off Board Go to Step #2
Battery Charger Faults” in
the TROUBLESHOOTING
section of this
manual

•
•
•

Key Off
Check AC power supply
Is the rated AC supply voltage present?

Go to Step #3

•
•
•

Key Off
Inspect battery and charger cables for damage,
corrosion, contamination or terminal problems
Do any of the above conditions exist?

Repair or ReGo to Step #4
place Battery
and/or Charger
Cables

•
•
•
•
•

Skip this step for sealed or AGM batteries
Key Off
Disconnect batteries
Check water level of all battery cells
Are the lead plates submerged?

Go to Step #4

Add Distilled
Water Until
Lead Plates
are Covered.

•
•
•
•

Key Off
Load test all batteries (AGM or Lead-Acid)
-orTest specific gravity of each cell using a hydrometer or refractometer ((Lead-Acid)
Do the batteries pass a load test or are all battery cells within 0.050 (50 points) specific gravity
of each other?

Replace Battery Charger

Replace
Battery or
Batteries

•

VALUE(S)

YES

Check AC
Supply Circuit
Protection

Terms:
AC = Alternating Current
AGM = Absorbed Glass Mat
Specific Gravity = Relative density of a substance compared to water (water = 1.000 specific gravity)

SS300 Service Information (3-2017)

TROUBLESHOOTING
Power-Up ON

POWER-UP ON

(2) 12 VDC Batteries
12 Volt
+
-

12 Volt
+
-

N.O.

5/GRN

N.C.

4/YEL

1/RED

COM

Not Used

CB1
4A

BLACK Cable

B4/YEL

P2-3 COM

N.O. P2-4
5/GRN

RED Cable

N.C. P2-2

Key
Switch

B+

13/BLK

Onboard Battery Charger (Opt)

7/PUR

6/BLU

AC Power Cord

6/BLU
13/BLK
J7-8 GND

J7-9 CHARGER INPUT

J7-10

J7-7 FLYBACK

6/BLU

Interface Module

M2A ec-H2O
Relay Coil

Battery Positive +

Touch Panel

Battery Negative PMC021

AC Volts

SS300 Service Information (3-2017)

TROUBLESHOOTING
MACHINE FAILED TO POWER UP
STEP

ACTION

•
•
•

YES

Key On
Test the total battery voltage using a voltmeter
Is the total battery voltage greater than 20
VDC?

Go to Step #2

Recharge
Batteries and
Test PowerUp Circuit
Operation

•
•
•

Key Off
Firmly press circuit breaker #1 to reset
Is circuit breaker #1 tripped?

Reset and Test
Power-Up Circuit
Operation

Go to Step #3

•
•

Key On
Test voltage applied to the power-up subsystem as shown on the electrical schematic
Are the electrical circuits operating as shown
on the electrical schematic?

Go Back to Step
#1

Identify Voltage Drop
Location
and Repair
or Replace
Necessary
Components

•

VALUE(S)

Terms:
VDC = DC Voltage

SS300 Service Information (3-2017)

TROUBLESHOOTING
PROPEL SUBSYSTEM (Option)
(2) 12 VDC Batteries
+

12 Volt

12 Volt
+
-

1/RED
CB4
30A

E-Stop Switch

I-Drive Propel Module
8/GRY

38/GRY

B+

P1-5 ON/OFF

Propel Enable
(B+ from J9-1 = ON)

Scrub Head
Pos. Switch

27/PUR
Enable Scrub Speed
(Ground = Low Speed)

P1-4 LOW SPEED

GND_REF P1-13
REVERSE P1-12

BLACK
RED
NATURAL
SHIELD/GRN

13/BLK

B-

P3-4 RX

POT_LOW P1-8

P3-3 TX

SPD_LIMIT P1-9

P1-1 BAIL ON/OFF POT HIGH P1-2

9/WHT

Propel
Motor

MTR

10/TAN

37/PUR

Directional Switch
(closed = reverse)

36/BLU
35/GRN

100K Ω Propel
Speed Limit Pot

34/YEL
33/ORA

P3-1 DIGITAL_GND

COMMUNICATION CABLE
TO INTERFACE MODULE
(SHIELDED)

Operational Matrix:

Propel
(Option)
Battery Positive +
PMC021

Enabled
Disabled
• Fwd/Rev Throttle • Battery Charger ON Interlock
• Neutral - Ready State
Command
• Fwd/Rev Switch • PMC (Propel Motor
Controller) Fault
Input

Battery Negative -

SS300 Service Information (3-2017)

TROUBLESHOOTING
FAILED TO PROPEL
STEP

ACTION

•
•
•

•

•
3

•
•
•
•
•
•

VALUE(S)

YES

Key On
Enable propel
Is there a flashing BDI fault fault code present?

See “Faults” in the
TROUBLESHOOTING section of this manual

Go to Step #2

See SERVICE DIAGNOSTICS TOOL in the
SERVICE section of this manual and confirm
the software is properly configured to enable
the propel feature
Is the software configured properly?

Go to Step #3

Reprogram
software

Key Off
Place machine on blocks so drive wheels are
lifted off the floor
Key On
Enable forward propel
Test voltage applied to the propel subsystem
as shown on the electrical schematic
Are the electrical circuits operating as shown
on the electrical schematic?

Go Back to Step
#1

Identify Voltage Drop
Location
and Repair
or Replace
Necessary
Components

Terms:
BDI = Battery Discharge Indicator

SS300 Service Information (3-2017)

TROUBLESHOOTING
SCRUB MOTOR ON
(2) 12 VDC Batteries
12 Volt
+
-

12 Volt
+
-

13/BLK

From Key
Switch B+

1/RED

6/BLU

NOTE: The scrub motor system
uses two relays (stepped) because
the M4A coil exceeds the max.
current rating of the J7-6 output
circuit.

Auxiliary Scrub
Brush Relay
6/BLU

M1A

J7-6 Interface
Module

Scrub
Brush Relay

M1B
6/BLU

20/TAN

Auxiliary Scrub
Brush Relay

42/BRN

M4A

13/BLK

1/RED

D-1

13/BLK

Scrub
Motor

Scrub Brush Relay

CB5 (37A)

M4B
12/BRN

26/BLU

MTR

13/BLK

Operational Matrix:
Enabled

Battery Positive +
Battery Negative -

Scrub
Motor

• Head Lowered Foot Pedal
• Fwd/Rev Throttle
Command or Bail
Activated on nonPropel models.

Disabled
• Head Raised - Foot Pedal
• Neutral - Ready State or Bail
released on non-propel
models.
• Low Battery Voltage
• Fault
• Battery Charger ON Interlock

PMC021

SS300 Service Information (3-2017)

TROUBLESHOOTING
SCRUB MOTOR FAILED TO TURN ON
STEP

ACTION

•
•
•

Key On
Enable scrub motor
Is there a flashing BDI fault fault code present?

See “Faults” in the Go to Step #2
TROUBLESHOOTING section of this manual

•
•
•

Key On
Enable scrub motor
Test voltage applied to the scrub motor subsystem as shown on the electrical schematic
Are the electrical circuits operating as shown
on the electrical schematic?

Go Back to Step
#1

•

VALUE(S)

YES

Identify Voltage Drop
Location
and Repair
or Replace
Necessary
Components

Terms:
BDI = Battery Discharge Indicator

SS300 Service Information (3-2017)

TROUBLESHOOTING
VACUUM FAN ON
(2) 12 VDC Batteries
12 Volt
+
-

12 Volt
+
-

13/BLK

From E-Stop
Switch B+

1/RED

Vacuum Fan
Relay

SW-8 Squeegee
Position Switch
(Closed= Down)
38/GRY

3/ORA

M3A

D-2
13/BLK

1/RED

CB6 (20A)

Vacuum Fan
Motor

M3B
15/GRN

29/WHT

MTR

13/BLK

Operational Matrix:
Enabled
Vacuum Fan

• Squeegee Lowered

Disabled
• Squeegee Raised
• Battery Charger ON Interlock

Battery Positive +
Battery Negative PMC021

SS300 Service Information (3-2017)

TROUBLESHOOTING
VACUUM FAN FAILED TO TURN ON
STEP

ACTION

•
•
•

Key On
Enable vacuum fan
Is there a flashing BDI fault fault code present?

See “Faults” in
Go to Step #2
the TROUBLESHOOTING section of this manual

•
•
•

Key On
Enable vacuum fan
Test voltage applied to the vacuum fan
subsystem as shown on the electrical
schematic
Are the electrical circuits operating as
shown on the electrical schematic?

Go Back to Step
#1

•

VALUE(S)

YES

Identify Voltage
Drop Location
and Repair or
Replace Necessary Components

Terms:
BDI = Battery Discharge Indicator

SS300 Service Information (3-2017)

TROUBLESHOOTING
SOLUTION CONTROL ON (CONVENTIONAL)

(2) 12 VDC Batteries
12 Volt
+
-

Circuit Breaker 1

12 Volt
+
-

P2-2 Onboard
Charger or Interlock Switch N.C.

1/RED

13/BLK

5/GRN

GND J7-8
J7-10 KSI (KEY SWITCH
INTERLOCK)

6/BLU

Key
Switch

13/BLK

J7-7 FLYBACK

6/BLU

SV1 Solution
Valve
54/YEL

J7-5 SOLUTION VALVE OUT

Bail Switch (N.O)
SENSOR_IN J4-4

31/PNK

+5V OUT J4-1

30/TAN

Bail Switch Harness
Interface Module

Operator’s Switch/LED
Touch Panel

Operational Matrix:
Enabled

Battery Positive +
Battery Negative -

• Head Lowered Solution
Foot Pedal
• Solution Control ON
Control
(Conventional) • Fwd/Rev Throttle
Command or Bail
activated on nonpropel models.

Disabled
• Head Raised - Foot Pedal
• Solution Control OFF
• Neutral - Ready State or bail
released on non-propel models.
• Low Battery Voltage
• Fault
• Battery Charger ON Interlock

PMC021

SS300 Service Information (3-2017)

TROUBLESHOOTING
SOLUTION CONTROL FAILED TO TURN ON (CONVENTIONAL)
STEP

ACTION

•
•
•

•

VALUE(S)

YES

Key On
Enable solution control (conventional)
Is there a flashing BDI fault fault code present?

See “Faults” in
the TROUBLESHOOTING
section of this
manual

Go to Step #2

Key On
Enable solution control (conventional)
Test voltage applied to the solution control
(conventional) subsystem as shown on the
electrical schematic
Are the electrical circuits operating as
shown on the electrical schematic?

Go Back to Step
#1

Identify Voltage
Drop Location
and Repair or
Replace Necessary Components

Terms:
BDI = Battery Discharge Indicator

SS300 Service Information (3-2017)

TROUBLESHOOTING
SOLUTION CONTROL ON (ec-H2O)
2/BRN

ec-H2O Mode Switch

Battery (-)

Battery (+)

Key Switch

J7-3 Interface
Module

13/BLK

ec-H2O
Relay

1/RED

6/BLU
86

13/BLK

M2A

D-3
M2B

43/ORA

MTR
Water Conditioning
Module Pump

CB2
4A

67/PUR

13/BLK

GND J12-5

J12-13 WCM
PUMP

GND J12-6

J12-14 WCM
PUMP

13/BLK

66/BLU

J12-11 VCC_1
46/BLU
43/ORA

50/TAN

MTR

N.C. Opens @
6 PSI +/- 2 PSI = Fault

ec-H2O NanoClean
Module

ec-H2O
Pump

CB3
4A

J12-12 VCC_2

52/BRN

PRESSURE IN J12-9

C1 Capacitor (0.01µf )

4EA/YEL
4EB/YEL
E-CELL

3EA/ORA
3EB/ORA

Com

J2-8 PUMP
Low-6 Volts
Med-10 Volts
Hi-13 Volts

CAN (-) J12-3
CAN (+) J12-2

N.O.

60/TAN

CAN-/GRN

N.C.

R-1 120 Ω
(Located in Harness)

Twisted Pair
CAN+/YEL

J11-4 (CELL_A1)
J11-5 (CELL_A2)
(FLUSH GND)
J11-1
(FLUSH SW)
J11-2
J11-3 (CELL_B1)

13EA/BLK-WHT

Flush Switch

9EA/WHT

J11-6 (CELL_B2)

Operational Matrix:
Enabled

Battery Positive +
Battery Negative ECC001

Solution
Control
(ec-H2O)

Disabled
• Head Lowered - Foot Pedal • Head Raised - Foot Pedal
• Solution Control OFF
• Solution Control ON
• ecH2O Switch OFF
• ecH2O Switch ON
• Neutral - Ready State or
• Fwd/Rev Throttle
Command or Bail activated bail released on
non-propel models.
on non-propel models.
• Low Battery Voltage
• ecH2O System Fault
• Battery Charger ON
Interlock

SS300 Service Information (3-2017)

TROUBLESHOOTING
SOLUTION CONTROL FAILED TO TURN ON (ec-H2O)
STEP

ACTION

•
•
•

•

VALUE(S)

YES

Key On
Enable solution control (ec-H2O)
Is there a flashing BDI or ec-H2O fault present?

See “Faults” in
the TROUBLESHOOTING
section of this
manual

Go to Step #2

Key On
Enable solution control (ec-H2O)
Test voltage applied to the solution control
(ec-H2O) subsystem as shown on the electrical schematic
Are the electrical circuits operating as shown
on the electrical schematic?

Go Back to Step Identify Volt#1
age Drop
Location and
Repair or Replace Necessary Components

Terms:
BDI = Battery Discharge Indicator

SS300 Service Information (3-2017)

TROUBLESHOOTING
SUN-I/O CIRCUIT BOARD TESTING (UNIVERSAL SCHEMATIC)
(2) 12 VDC Batteries
+

12 Volt

12 Volt
+
-

[fill in the blank] Module
Circuit Breaker

Unswitched B+

B-

Key Switch

MTR

O
O

Light

O
O

Input P1-X
P2-X Output
P2-X Output

P2-X Output

PMC021

Battery Negative -

I
I
I

Directional Switch
(closed = reverse)

5K Ω Throttle
Potentiometer

WIPER P3-X
5 V P3-X

P2-X Output

NOTE: The “P1-X” or sometimes “J1-X” format
refers to the plug or connector number followed
by the pin number within that connector. For
example, P1-4 means plug number 1, pin number 4.
Use this information to locate and identify proper
wires per the actual electrical schematic.

Battery Positive +

0 V P3-X
Input

S
Motor

Input P1-X

P1-X Switched B+

S = Switched (+)
U = Unswitched (+)
N = Negative (-)
I = Inputs
O = Outputs
SS300 Service Information (3-2017)

TROUBLESHOOTING
SUN-I/O CIRCUIT BOARD TESTING PROCEDURE
STEP

ACTION

VALUE(S)

1 Switched (+)*

•
•

Key On, circuits loaded (preferred)
All electrical components remain connected to wire harness
Use an electrical schematic to identify
all switched (+) power supply wires
Is there switched battery voltage (+)
applied to the circuit board?

Applied Volt- Go to Step
age Must
#2
Be Within 1
Volt of Actual
Battery Voltage

Identify Voltage Drop
Location
and Repair
or Replace
Necessary
Components1

Key On, circuits loaded (preferred)
All electrical components remain connected to wire harness
Use an electrical schematic to identify
all unswitched (+) power supply wires
Is there unswitched battery voltage
(+) applied to the circuit board?

Applied Volt- Go to Step
age Must
#3
Be Within 1
Volt of Actual
Battery Voltage

Identify Voltage Drop
Location
and Repair
or Replace
Necessary
Components1

Key On, circuits loaded (preferred)
All electrical components remain connected to wire harness
Use an electrical schematic to identify
all negative(-)/ground supply wires
Is there battery negative (-) applied to
the circuit board?

Applied Volt- Go to Step
#4
age Must
Be Within 1
Volt of Actual
Battery Voltage

Identify Voltage Drop
Location
and Repair
or Replace
Necessary
Components1

•
•

2 Unswitched
(+)*

•
•
•
•

3 Negative (-)*

•
•
•
•

4 Inputs

•
•

•
•
5 Outputs

•
•

YES

Key On
Manually exercise all input devices
and observe status change using a
multimeter
Use an electrical schematic to identify
all input circuits
Do all inputs function correctly?

Go to Step
#5

Repair or
Replace
Necessary
Input Components1

Key On
Disconnect battery and circuit board
from wire harness and test output circuits for open or shorted circuits using
an Ohmmeter.
Use an electrical schematic to identify
all output circuits
Is there an open or shorted 2 output
circuit causing the trouble symptom?

Repair or
Replace
Necessary
Output Circuit Components1

Replace Circuit Board.

1 Wire harnesses are components.
2 An open circuit has infinite resistance “O.L.”. A shorted circuit has “0” resistance. Always test through the
entire circuit.
* Switched (+) and Unswitched (+) indicate positive battery voltage applied to the circuit board. Negative (-)
indicates battery negative (ground) as part of the power supply to the circuit board.

SS300 Service Information (3-2017)

TROUBLESHOOTING
CAN OPEN NETWORK ISSUES

NETWORK RESISTANCE

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

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

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

Method 1

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

Method 2

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

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

SS300 Service Information (3-2017)

TROUBLESHOOTING
NODE (MODULE) RESISTANCE
Each node on the network has a connector for the
CAN communication wires. Check each board individually to make sure the CANH and CANL resistance
measurements are > 1M Ω for non-terminating nodes
and 122 Ω for terminating nodes. The CAN connections may be on their own connector (pictured below)
or combined into another connector. See specific
machine schematic for more details.

WIRE CONTINUITY TO NODE
A check can be made between two points on the harness verifying continuity of the wire harness. Check
the yellow to yellow connections and the green to
green.

SS300 Service Information (3-2017)

TROUBLESHOOTING
MACHINE NODE TABLE
The following table outlines the CAN nodes by machine model. A standard node is one that is always
present. Optional nodes are dependent on the
customer order. Gray box = Terminating Resistor
Locations. If only one box marked on a machine, the
second termination is made in the harness.
Machine model
Master/Slave

Nodes
Master

Slave

Optional Nodes

Standard

Optional

SS300

User
Interface

Charger

EC H2O

SS300 Service Information (3-2017)

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

PROGRAMING A NEW INTERFACE MODULE
SYSTEM REQUIREMENTS: Windows® 7 OS,
Microsoft .NET 4.5 or later, USB to Mini-USB cable.
5. Connect a USB cable from a notebook computer
to the machine and turn the key switch On.

Authorized service providers can download
the Service Diagnostics software from the My
Tennant portal by visiting www.tennantco.com.
Factory-Direct Tennant Service has this software
installed on their ServiceLink devices.
A USB cable connects from the notebook to an
external port on the control console. The SERVICE
DIAGNOSTICS TOOL configures up to five control
modules depending on optional trim packages.
The interface module stores configuration data and
communicates via RS232 serial communication
with the i-Drive and through a CAN-Bus to all other
modules.
• Interface Module: The interface module is
located in the operator’s console.
• Machine Control Module: The machine control
module is located at the rear of the battery
compartment beneath a cover.
• I-Drive Propel Module (option): The I-Drive
propel module is located above the rear
squeegee assembly at the rear of the scrubber..
• Onboard Battery Charger Module (option): The
onboard battery charger is located at the rear of
the unit, beneath the plastic cover.
• ec-H2O NanoClean Module (option): The ecH2O module is located in the front of the unit,
beneath the recovery tank.

SS300 Service Information (3-2017)

6. Launch the software by double clicking the
Service Diagnostics desktop shortcut or find the
software in All Programs.
NOTE: Windows® may prompt a restart after
installing the machine driver. Decline the restart,
close Service Diagnostics and relaunch Service
Diagnostics.

SERVICE
7. The Service Diagnostics tool now connects to the
control module network.

10. The programming process begins and all of the
control modules are updated (if applicable).

8. The Service Diagnostics tool will automatically
detects a new interface module installation. Enter
the model and serial number and then click on
the arrow button.

11. The Service Diagnostic tool may prompt to
cycle the key switch off/on during the process.
If prompted, click on the OK button and then
cycle the key switch to allow the programming to
continue.

12. Cycle the key switch to save selections.

9. Inspect the actual machine configuration and
match applicable configurations from the dropdown menus and then click on the arrow button.

SS300 Service Information (3-2017)

SERVICE
RE-CONFIGURING EXISTING MODULES
SYSTEM REQUIREMENTS: Windows® 7 OS,
Microsoft .NET 4.5 or later, USB to Mini-USB cable.
Machine software configuration, which is stored in
the interface module, must be programmed if the
i-Drive or interface modules are replaced in the field
or if optional features are installed in the field.

2. Launch the software by double clicking the
Service Diagnostics desktop shortcut or find the
software in All Programs.
NOTE: Windows® may prompt a restart after
installing the machine driver. Decline the restart,
close Service Diagnostics and relaunch Service
Diagnostics.

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

Updates
Available
(Yellow Highlight)

SS300 Service Information (3-2017)

SERVICE
4. Click on the Configuration button to display a list
of configurable options.

5. Select all of the desired re-configurations that
apply from the drop-down menus and then click
individual arrow buttons to launch individual
module re-programming (this is faster) or the
header arrow button to launch all module reprogramming (this is slower). Click on the refresh
button to display the new configuration following
reprogramming.

6. Cycle the key switch to save changes.

SS300 Service Information (3-2017)

SERVICE
PROGRAMMING THE I-DRIVE MODULE (OPTION)
SYSTEM REQUIREMENTS: Windows® 7 OS,
Microsoft .NET 4.5 or later, USB to Mini-USB cable.
Machine software configuration, which is stored in
the interface module, must be programmed if the
i-Drive or interface modules are replaced in the field
or if optional features are installed in the field.

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

Updates
Available
(Yellow Highlight)

SS300 Service Information (3-2017)

SERVICE
4. Click on the I-Drive button.

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

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

6. Cycle the key switch to save.
DISPLAYING FAULT CODES
SYSTEM REQUIREMENTS: Windows® 7 OS,
Microsoft .NET 4.5 or later, USB to Mini-USB cable.
Authorized service providers can download
the Service Diagnostics software from the My
Tennant portal by visiting www.tennantco.com.
Factory-Direct Tennant Service has this software
installed on their ServiceLink devices.

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

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

SS300 Service Information (3-2017)

SERVICE
BATTERY CHARGER SETTINGS
The battery charger is set to charge the battery type
supplied with your machine. If you choose to change
to a different battery type or capacity, the charger’s
charging profile must be changed to prevent battery
damage.

CHANGING OFF-BOARD BATTRY CHARGER
SETTINGS
1. Disconnect charger from the machine and plug
charger into power supply.

The machine’s battery discharge indicator (BDI) must
also be reprogrammed to match battery type to prevent battery damage and/or short run- time.
NOTE: For machines shipped without batteries, the
battery discharge indicator and the on- board battery
charger are set for GEL batteries as the default.
If you choose to use a different battery type, the
settings must be changed as described as below.
NOTE: For machines shipped without batteries and
supplied with an Off- Board Charger, the off- board
battery charger is set for wet lead- acid batteries from
the factory. The machine’s battery discharge indicator
is set for GEL batteries as the default. The machine’s
battery discharge indicator must be reprogrammed to
match charger settings (See OFF-BOARD BATTERY
CHARGER below).

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

BLINKING
YELLOW

OFF-BOARD BATTERY CHARGER:
To change the off-board battery charger settings, See
CHANGING OFF-BOARD BATTERY CHARGER
SETTINGS.
To reprogram the machine’s battery discharge indicator (BDI), service application software is required,

SS300 Service Information (3-2017)

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

SERVICE

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

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

TURNS
RED

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

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

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

RED
TURNS
OFF

SS300 Service Information (3-2017)

SERVICE
ON-BOARD BATTERY CHARGER
Pro/Membrane Models - Service application software
required, contact service. As an alternative, the charger profile may be manually changed. See CHANGING ON- BOARD BATTERY CHARGER SETTINGS
for Pro-Membrane model. The battery discharge indicator will automatically reprogram to match battery
type when the battery charger profile is changed.
Pro-Panel Model - See CHANGING ON-BOARD
BATTERY CHARGER SETTINGS for Pro- Panel
model. The battery discharge indicator will automatically reprogram to match battery selection.
CHANGING ON-BOARD BATTERY CHARGER
SETTINGS (Pro-Membrane model)
To manually change the on-board battery charger
settings for a different battery type, carefully follow
instructions as described below :

Fig. 115
4. Disconnect the battery cable, power cord and
wire harness from charger. Using a T25 star
screwdriver, remove the four screws that mount
charger to machine (Fig. 116). Remove charger
from machine.

NOTE: The manual method is only an alternative
if unable to change setting by use of the Service
Application Software performed by Service.
1. Disconnect battery cables (Fig. 114).

Fig. 116
5. Remove the black cap from bottom side of
charger to access the profile dial (Fig. 117)

Fig. 114
2. Unwrap the battery charger power cord from the
cord hooks.
3. 3. Using a T25 star screwdriver, remove the
two screws located at the bottom of the control
console to access battery charger (Fig. 115).
Fig. 117
6. Using a small standard screwdriver, turn the dial
to the appropriate battery type according to the
following chart (Fig. 118).

SS300 Service Information (3-2017)

SERVICE
CHANGING ON-BOARD BATTERY CHARGER
SETTINGS (Pro-Panel model)
NOTE: To perform this procedure, machine must be
in supervisor mode. See SUPERVISOR CONTROLS
instructions at back of manual.
To change the on-board battery charger settings for a
different battery type :
1. Turn the key to the on position.
Fig. 118
Dial
Position

Battery Description Settings with AH
Ranges

Factory setting* Programmed via CANBus

Wet, Trojan 105- 155 AH

Wet, Enersys/Tab 105- 155 AH

AGM, Discover 80- 150 AH

AGM, Fullriver 80- 150 AH

AGM, TPPL, Enersys 20- 40 AH

Gel, Sonnenschein 80- 150 AH

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

2. Press the settings button located on the home
screen (Fig. 119).

Fig. 119
3. Press the Setup button to access the Setup
screen (Fig. 120).

7. Replace the black cap on charger, reinstall
battery charger and replace control console.
8. Reconnect the battery cable connection.
9. To set the BDI for the new battery type, plug the
on- board battery charger cord into an electrical
outlet. The machine’s software will automatically
reprogram the BDI to the new battery type.

Fig. 120

SS300 Service Information (3-2017)

SERVICE

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

Fig. 121

BATTERY CHARGER OPERATION

Above is a graph representing the I-U-I (constant
current-constant voltage-contant current) charging
strategy used to charge batteries. For flooded (wet)
lead-acid batteries, the finish voltage can rise up to
approximately 34 Volts (24 Volt System). The finish phase of the charge cycle causes out gassing
bubbles to mix up the electrolyte and prevent sulphation build-up in the battery.
NOTE: Flooded (wet) lead-acid batteries outgas during a normal charging cycle. Always charge batteries
in a well-ventilated area.
The length of charge time for each phase and overall
charge time varies based on the size of the battery,
size of the charger, and other conditions of the battery such as discharge level, age of battery, temperature, etc.
Equalization Charge Cycle - The equalization
charge cycle automatically occurs once every 30
complete charge cycles on (wet) lead-acid batteries
only. Charge current increases to higher levels during
the equalization charge to mix layers of electrolyte
that form as a result of repeated charging/discharging cycles. Maintenance-free batteries can become
damaged from an equalization charge, which is why
it is important to make sure the Tennant-specified
charger is programmed for the battery option used
(see BATTERY CHARGER SETTINGS ON BOARD/
OFF BOARD in the SERVICE section of this manualMaintenance-free batteries, such as AGM and Gel,
use slightly lower finish voltages (approximately 31
Volts) to keep the batteries from outgassing. Water
can not be added to maintenance-free batteries, so
these batteries must be replaced if they are repeatedly over charged or the cells are dry due to an
incompatible charger or charger setting.

SS300 Service Information (3-2017)

SERVICE

REMOVING SCRUB HEAD ASSEMBLY

5. Remove front shroud mounting hardware (2).

FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.
1. Drain recovery tank, turn off key, and disconnect
batteries.
2. Remove debris tray (cylindrical only).

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

3. Remove scrub brushes and set aside.

7. Disconnect motor from wire harness connection.

4. Lower scrub head to floor.

SS300 Service Information (3-2017)

SERVICE
8. Remove lift mechanism mounting bolts (2).

9. Remove scrub head assembly.

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

INSTALLING SCRUB HEAD ASSEMBLY
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.
1. Installation is the reverse of removal.
2. Cylindrical Head Option Only: There are required
brush pattern adustments on the cylindrical
scrub head (See CHECKING AND ADJUSTING
CYLINDRICAL SCRUB BRUSH PATTERN in the
SERVICE section of this manual).
CHECKING AND ADJUSTING CYLINDRICAL
SCRUB BRUSH PATTERN
NOTE: This procedure must be completed using a
new set of brushes. Following this procedure using
worn brushes may result in uneven brush wear and
shortened brush life.
1. Apply chalk to a flat, level surface.

SS300 Service Information (3-2017)

SERVICE
2. Disconnect the transaxle motor electrical
connection.

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

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

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

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

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

SS300 Service Information (3-2017)

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

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

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

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

9. Loosen (do not remove) the RH side linkage bolt.
12. The taper adjustment is complete. If the pattern
is uneven front-to-rear, the brush pattern can be
further adjusted using the slotted top bolt. Loosen
the top bolt just enough so the scrub head
bracket moves freely and the scrub head settles
in it’s natural position on the level floor.

SS300 Service Information (3-2017)

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

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

REMOVING LOWER ORBITAL HEAD ISOLATORS
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.
1. Remove scrub head assembly. See REMOVING
SCRUB HEAD ASSEMBLY in the SERVICE
section of this manual.

2. Place the scrub head on a work bench and
loosen the nyloc nuts for the (4) lower isolators.

5. Loosen the 4 mm set screw securing the
concentric motor weight to the motor shaft.

3. Flip the head upside down and remove the pads.
6. Remove the lower plate and the lower isolators
(4).

SS300 Service Information (3-2017)

SERVICE
INSTALLING LOWER ORBITAL HEAD ISOLATOR

REMOVING TRANSAXLE ASSEMBLY (OPTION)

FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.

1. Installation is the reverse of removal.

1. Drain solution and recovery tanks.

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

Set Screw

2. Disconnect batteries.

3. Remove batteries and set aside.

SS300 Service Information (3-2017)

SERVICE
4. Remove rear squeegee assembly and set aside.

7. Remove transaxle mounting hardware

5. Carefully lower machine onto the left side using a
protective blanket.
INSTALLING TRANSAXLE ASSEMBLY (OPTION)
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.
1. Installation is the reverse of removal.

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

SS300 Service Information (3-2017)

SERVICE
PTC (PUSH-TO-CONECT) FITTINGS

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

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

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

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

SS300 Service Information (3-2017)

SERVICE
DISCONNECTING
CAUTION: Contents may be under
pressure. Relieve system pressure before
disconnecting fittings.
1. Push in collet squarely against face of fitting to
release the hose from the fitting. With the collet
held in this position, the tube can be removed.
The fitting can be re-used.

REMOVING VACUUM FAN
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.
1. Key Off and disconnect batteries.

2. Remove rear squeegee hose from recovery tank.

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

SS300 Service Information (3-2017)

SERVICE
4. Remove vacuum fan mounting hardware (3).

INSTALLING VACUUM MOTOR
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.
1. Installation is the reverse of removal.

5. Remove vacuum fan assembly.

SS300 Service Information (3-2017)

SERVICE
REMOVING CARBON BRUSHES

INSTALLING CARBON BRUSHES

FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.

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

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

2. Loosen carbon brush mounting torx screws (4).
2. Clean the commutator using a stone and then
use compressed air to clean any dust from inside
the motor.

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

SS300 Service Information (3-2017)

SERVICE
REMOVING WATER SOLENOID

4. Remove rear squeegee assembly and set aside.

FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.
1. Drain solution and recovery tanks.

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

2. Disconnect batteries.

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

SS300 Service Information (3-2017)

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

INSTALLING WATER SOLENOID
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off machine,
remove key and disconnect batteries.
1. Installation is the reverse of removal.

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

SS300 Service Information (3-2017)

SERVICE
ADJUSTING WATER SOLENOID

3. Disconnect transaxle motor (option) electrical
connector.

FOR SAFETY: Before leaving or servicing machine, stop on level surface, turn
off machine, and remove key.

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

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

4. Add water to the solution tank.

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

SS300 Service Information (3-2017)

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

8. Reinstall the adjustment knob against the stop
pin as shown below. Tighten set screws (2).
NOTE: Tighten one set screw and then rotate the
knob to gain access to the other set screw.

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

9. Reconnect PTC (Push-To-Connect) fitting
to water solenoid valve, cut zip tie securing
bail handle, and reconnect transaxle motor
connection. Adjustment is complete.
6. Turn the solenoid valve stem completely counter
clockwise for maximum water flow.

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

SS300 Service Information (3-2017)

SERVICE
CONTROLL MODULES

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

REMOVING MACHINE CONTROL MODULE
(OPTION)
1. Drain solution and recovery tanks.

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

2. Disconnect batteries.

3. Remove batteries and set aside.

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

SS300 Service Information (3-2017)

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

REMOVING i-DRIVE MODULE (OPTION)
FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.
1. Key Off and batteries disconnected.
2. Remove T-25 torx mounting screws (2).

INSTALLING CONTROL MODULE
FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.

3. Carefully lower access cover.

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

4. Remove four (4) hex screws to remove the
control consol plate.
2. Installation is reverse of removal.
NOTE: The torque specification for control module
electrical cables is 52 in-lbs (6 Nm).

100

SS300 Service Information (3-2017)

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

REMOVING ONBOARD BATTERY CHARGER
(OPTIION)
FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.
1. Key Off and batteries disconnected.
2. Remove T-25 torx mounting screws (2).

INSTALLING I-DRIVE MODULE (OPTION)
FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.
1. Installation is reverse of removal.
3. Carefully lower access cover.
2. The new I-Drive module must be programmed
to operate in the scrubber. See SERVICE
DIAGNOSTICS TOOL in the SERVICE section of
this manual.

4. Disconnect charger electrical connections.

SS300 Service Information (3-2017)

101

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

INSTALLING ONBOARD BATTERY CHARGER
FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.
1. Installation is reverse of removal.

6. Remove battery charger.

NOTE: This battery charger can be programmed for
multiple battery configurations. This configuration
data is stored in the interface module and will
automatically configure a replacement battery
charger once installed and following a power-up
cycle. Reprogramming is required if the interface
module has been replaced, or if a different type
of battery is used in the equipment (i.e. other
than factory-installed equipment). (See SERVICE
DIAGNOSTICS TOOL in the SERVICE section of this
manual)
Models equipped with the PRO-Panel LCD Touch
Panel can be configured through the touch panel.
All other models must be configured using separate
configuration software via a mini-USB programming
port on the back of the operator’s console. (See
SERVICE DIAGNOSTICS TOOL in the SERVICE
section of this manual.)

102

SS300 Service Information (3-2017)

SERVICE
REMOVING INTERFACE MODULE

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

FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.
1. Key Off and batteries disconnected.
2. Attach a static wrist strap to the battery (-)
terminal to prevent ESD damage to the logic
board.

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

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

7. Disconnect electrical connections and remove
interface module.
INSTALLING INTERFACE MODULE
FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.
4. Carefully lower access cover.
1. Installation is reverse of removal.
2. The new interface module must be programmed
to operate in the Scrubber. See SERVICE
DIAGNOSTICS TOOL in the SERVICE section of
this manual.

SS300 Service Information (3-2017)

103

SERVICE
REMOVING BAIL SWITCH, SPEED
POTENTIONMETER, OR DIRECTIONAL SWITCH

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

FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.
1. Key Off and batteries disconnected.
2. Remove rear access cover mounting screws (2).

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

3. Carefully lower access cover.

7. Remove cover and set aside.

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

104

SS300 Service Information (3-2017)

SERVICE
8. Remove operator console mounting bolts (2).

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

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

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

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

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

SS300 Service Information (3-2017)

105

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

INSTALLING BAIL SWITCH, SPEED
POTENTIOMETER, OR DIRECTIONAL SWITCH
FOR SAFETY: When servicing machine,
disconnect battery connections before working
on machine.
1. Installation is reverse of removal.

15. Remove bail switch.

106

SS300 Service Information (3-2017)

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SS300 Service Manual Nobles Walk Behind Floor Scrubber

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