Onyx DX20 User manual

081320 Rev. 1
AUTOMATIC FLOOR SCRUBBER
OPERATOR MANUAL

1
081320 Rev. 1
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INTRODUCTION
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This safety manual is furnished with each new
model. It provides necessary operation and
maintenance instructions.
Read this manual completely and understand the
machine before operating or servicing it.
This machine will provide excellent service.
However, the best results will be obtained at
minimum costs if:
• The machine is operated with reasonable
care.
• The machine is maintained regularly - per the
maintenance instructions provided.
• The machine is maintained with manufacturer
supplied or equivalent parts.
To view, print or download manuals online visit
www.onyxsolutions.com/manuals.
ONYX Systems LLC
12703 Commerce Station Drive
Suite 200
Huntersville, NC 28078
Phone: [phone]
www.onyxsolutions.com
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INTENDED USE
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The automatic floor scrubber is intended for
commercial use, for example factories, shops,
offices and rental in hotels, schools, hospitals,
businesses. It is designed to scrub hard floor
surfaces (concrete, tile, stone, synthetic, etc.) in
an indoor environment. This machine is not
intended for cleaning carpets or sanding wood
floors. Use only recommended pads/brushes and
commercially available floor cleaning detergents.
Do not use this machine other than described in
this Operator Manual.
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MACHINE DATA
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Please fill out at time of installation for
future reference.
MODEL NO.- _________________________
SERIAL NO. - _________________________
INSTALL DATE - _______________________
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UNCRATING MACHINE
Carefully check machine for signs of damage.
Report damages at once to carrier.
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.
ATTENTION: Do not remove machine from pallet
without using ramp, machine damage may occur.

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081320 Rev. 1
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SAFETY 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.
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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.

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081320 Rev. 1
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FOR SAFETY (cont.):
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 5% grade level.
• Use a winch if ramp incline exceeds a 5%
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.

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081320 Rev. 1
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SAFETY SYMBOLS
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These following safety symbols appear on the machine and in this manual to alert the operator of potential
safety hazards. Read them carefully and understand their meaning. Replace labels if they are missing or
become damaged or illegible.
DANGER
The signal word DANGER indicates a hazardous situation which, if not avoided according to the instruction
found in this Operator Manual or on your machine, will result in death or serious bodily injury.
WARNING
The signal word WARNING indicates a hazardous situation which, if not avoided according to the
instruction found in this Operator Manual or on your machine, could result in death or serious bodily
injury.
CAUTION
The signal word CAUTION indicates a hazardous situation which, if not avoided according to the instruction
found in this Operator Manual or on your machine, could result in minor or moderate injury or damage to
your engine or property.

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081320 Rev. 1
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MACHINE SPECIFICATIONS
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SPECIFICATION
DX20
DX26
DX34
Voltage
24 Volt
24 Volt
24 Volt
Battery Capacity
100 Ah
200 Ah
200 Ah
Cleaning Width
20”
26”
34”
Squeegee Width
30”
42”
44”
Cleaning Efficiency
24,000 sqft/hr
28,000 sqft/hr
34,000 sqft/hr
Brush Motor
650W
2 x 650W
2 x 650W
Vacuum Motor
500W
500W
500W
Solution Capacity
18.5 gallons
25 gallons
25 gallons
Recovery Capacity
20 gallons
28 gallons
28 gallons
Weight
460lbs.
650lbs.
665lbs.
Dimensions (LxWxH)
49”x 20”x 47”
53”x26”x47”
53”x34”x47”
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COMPONENTS & CONTROLS
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1. KEYSWITCH
2. BATTERY INDICATOR
3. VACUUM SWITCH
4. BRUSH SWITCH
5. WATER CONTROL
6. SPEED CONTROL
7. SQUEEGEE PEDAL
8. FORWARD/REVERSE
9. SQUEEGEE
10. SOLUTION FILL
11. RECOVERY TANK
1.
1.
2.
1.
3.
1.
4.
1.
8.
1.
5.
1.
6.
1.
7.
1.
10.
1.
11.
1.
9.
1.
7.
1.

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081320 Rev. 1
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MACHINE OPERATION
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Machine Operation
For safety: Please do not operate this machine before reading and understanding the operator manual.
Warning: Fire or explosion hazard. Do not operate the machine close to or in the place where there is
flammable liquid, air or dust.
Pre-operational checklist:
□ Clean the dust on the ground.
□ Check the battery indicator to be sure the battery is charged.
□ Check the abrasion conditions of the pad or brush.
□ Check the condition of the squeegee and adjust and/or replace if necessary.
□ Confirm that the recovery tank is empty and is equipped with a clean floating filter screen.
□ Check the conditions of the skirt section of the brush head.
To operate machine:
1. Switch the key of the main power supply to the position of ON(I).
2. Pull down the squeegee lifting rod to lower the squeegee to the ground.
3. Step on the brush head lifting pedal or press the Brush Switch to lower the brush head.
5. Press the vacuum motor switch (20” Model only).
6. Motor drive models: adjust the speed control knob to the desired cleaning speed.
7. Each cleaning path should overlap by 2in.
8. Keep the machine moving to avoid damage to the floor.
9. If there is a drag mark on the ground after the squeegee, lift and clean the squeegee.
10. Do not operate the machine on the slope with a slope over 5% (3°).
12. Use the “double scrub” method to clean extremely dirty areas. Lift up the squeegee and scrub the
floor back and forth, the re-lower the squeegee for waste recovery.
13. Replace or rotate the pad or brush as required.
14. Observe the power consumption of the battery indicator.
15. Observe the amount of solution in the solution tank. In traditional scrubbing, the typical
consumption is about 2.5 gallons every 10 minutes.
16. When the solution in the solution tank is empty, empty the recovery tank first, then refill the
solution tank.
17. When finished cleaning, stop and place the machine on the level ground, turn off and take key.
18. After cleaning, preform the daily maintenance procedures.

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081320 Rev. 1
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MACHINE MAINTENANCE
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Follow the daily, weekly and monthly maintenance procedures to keep the machine in good condition.
Warning: Electric shock hazard. Please firstly disconnect the battery wring before maintaining the machine.
DAILY MAINTENANCE:
1. Drain and clean the wastewater tank.
2. Dismantle and flush the floating filter screen in the wastewater tank.
3. Drain the clean water tank and flush the water tank with hot water of no higher than 140F as required.
4. Dismantle the scouring pad/brush for cleaning. If there is any abrasion, overturn or replace the scouring
pad.
5. Wipe the squeegee adhesive tape. Place the squeegee component in the rising position to avoid
damage to adhesive tape.
6. Check the abrasion conditions of the scraper edge of the squeegee adhesive tape. If there is any wear
and tear, exchange two sides of the adhesive tape.
7. Use multi-purpose detergent and wet cloth to wipe the machine. For safety: please do not spray this
machine with high pressure or flush this machine with water pipe when cleaning the machine to avoid
failure of electronic component.
8. Check the abrasion conditions of the skirt side of the brush head and replace it if there is any wear and
tear or damage.
9. Charge the battery. To prolong the life of the battery and ensure the optimum efficiency of the
machine, the battery must be charged after the use time of the machine exceeds 30min.
MONTHLY MAINTENANCE:
1. Dismantle the filter of the clean water tank from the bottom of the machine and clean the filter screen.
Ensure the clean water tank is emptied before dismantling the filter.
2. Clean the top of the battery to prevent electrode corrosion (refer to [Battery Maintenance]).
3. Check whether the battery wiring is loose.
4. Check and clean the cover seal of the wastewater tank and replace it if there is any damage.
5. Spray the silica gel dry lubricant on all pivots and wheels and cover a layer of water-proof lubricating oil
to ensure smooth operation of wheels and pivots.
6. Check whether the nuts and bolts on the machine are loose.
7. Check whether the machine leaks.
QUARTERLY MAINTENANCE:
Please contact your local service center every 250 hours for a machine inspection of brush and drive motors.
Warning: Electric shock hazard. Please firstly disconnect the battery wring before maintaining the machine.

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081320 Rev. 1
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TROUBLESHOOTING
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PROBLEM
REASON
SOLUTION
The machine cannot be operated
The battery has no power
Charge the battery
The battery fails
Replace the battery
The battery wiring is loose
Fasten the battery wiring
The main fuse blows out
Replace the fuse
The brush motor doesn’t work
The brush head is off ground
Lower the brush head
The battery meter is locked
Charge the battery
The brush switch fails
Contact service center
The brush motor fails
Contact service center
The vacuum motor doesn’t work
The squeegee is off the ground
Lower the squeegee
The vacuum motor fuse is blown
Replace the fuse
The vacuum motor wiring has failed
Contact service center
The vacuum motor fails
Contact service center
Little or no water flows out
The filter or solution hose is clogged
Clean out the solution filter
The speed of the flow knob is off
Adjust the water control knob
The screw of the water knob is loose
Lubricate and fasten screw
The recovery rate is low
The recovery tank is full
Drain the recovery tank
The recovery suction pipe is blocked
Clean the suction pipe
The recovery tank seal is damaged
Replace the seal
The vacuum motor has failed
Contact service center
The operating time is short
The battery is damaged
Replaced the battery
The battery cannot be charged
Replace the charger