Unoclean Stinger 20 User manual

OPERATOR MANUAL
Operator & Parts Manual
Battery Automatic Floor Scrubber
8130054
REV.02(06-2021)
Model: UNO-20FSB / i20NBV

UNO-20FSB 2
OPERATOR MANUAL
HOW TO ORDER PARTS
Please contact your local distributor. Having the following information available will be helpful:
• Machine model name
• Serial number from serial plate
• Part # and quantity (do not order by page number)
READ OPERATOR MANUAL CAREFULLY!
Specications and parts are subject to change without notice.
PROTECT THE ENVIRONMENT
Please dispose of packaging materials, old machine components
such as batteries, hazardous uids, including antifreeze and oil, in an
environmentally safe way according to local waste disposal regulations.
Always remember to recycle.

3
OPERATOR MANUAL
UNO-20FSB
SAFETY PRECAUTIONS......................................................................................................4
MACHINE COMPONENTS...................................................................................................5
PANEL COMPONENTS........................................................................................................6
MACHINE SETUP & INSTALLATION....................................................................................7
MACHINE OPERATION.................................................................................................8
WHILE OPERATING MACHINE..........................................................................................8
TANK DRAINING..................................................................................................................9
BATTERY CHARGING.........................................................................................................9
PREVENTATIVE MAINTENANCE...................................................................................9-10
ADJUSTMENT OF SQUEEGEE ASSEMBLY ....................................................................11
BASIC TROUBLESHOOTING.............................................................................................12
TECHNICAL SPECIFICATIONS.................................................................................13
PARTS LIST..........................................................................................................14-33
WEAR AND TEAR PARTS...............................................................................................34
WIRING DIAGRAM .......................................................................................................35
TABLE OF CONTENTS

UNO-20FSB 4
OPERATOR MANUAL
SAFETY PRECAUTIONS
This machine is intended for commercial use. It
is designed exclusively to scrub hard oors in an
indoor environment and is not constructed for any
other use. Only use recommended accessories.
All operators shall read, understand and
exercise the following safety precautions:
1. Do not operate machine:
-Unless trained and authorized.
-Unless you have read and understand the
operators manual.
-In ammable or explosive areas.
-If not in proper operating condition.
-In outdoors areas.
2. Before starting machine:
-Make sure all safety devices are in place
and operate properly.
3. When using machine:
-Go slow on inclines and slippery
surfaces.
-Follow all safety guidelines.
-Be very careful when using the machine in
reverse.
-Reduce speed when turning.
-Report and x any damage to machine prior
to operating it.
-Never allow children to play on or
around.
-Do not operate on inclines that exceed 5%
(3°).
4. Before leaving or servicing machine:
-Stop on level surface.
-Turn o󰀨 machine.
5. When servicing machine:
-Read operators manual thoroughly prior to
operating or servicing this machine.
-Use manufacturer supplied or approved
replacement parts.
-Secure machine with wheel blocks prior to
jacking the machine up.
-Use approved jack or hoist to safely elevate
the machine.
-Disconnect batteries prior to working on
machine.
-Wear gloves when handling batteries or
battery cables.
-Avoid any contact with battery acid.
-Avoid moving parts. Do not wear loose tting
clothing while servicing machine.
WARNING: Batteries emit hydrogen
gas. Explosion or re can result from
hydrogen gas. Keep sparks and open
ames away! Keep battery compartment
open when charging.
WARNING: Flammable materials can
cause an explosion or re. Do not use
ammable materials in tanks.
WARNING: Flammable materials or
reactive metals can cause explosion or re.
Do not pick up.

5
OPERATOR MANUAL
UNO-20FSB
MACHINE COMPONENTS
1. Control Handle
2. Control Handle Start Bail
3. Recovery Tank Support Stand
4. Vacuum Motor, 24VDC
5. Batteries
6. Bucket Fill Port/ Clean-Out Port
7. Solution Tank
8. Motor Hub Lock Pin (Disk Models)
9. Scrub Head Assembly
10. Scrub Head Skirt
11. Wheels, 8 Inch
12. Caster, 3.15 Inch
13. Caster, 2 Inch, Squeegee Blade Adjustment
14. Hose Fill-Port
15. Squeegee Storage Bracket
16. Control panel (see Panel components)
17. Overload protector
18. On-board battery charger / Window
19. Solution Tank Level / Drain Hose
20. Scrub Head Lift Pedal
21. Bumper Rollers
22. Squeegee Assembly
23. Squeegee Vacuum Hose
24. Filter Assembly
25. Ball Valve
26. Squeegee Lift Lever
27. Power cord, on-board Battery charger
28. Recovery Tank Drain Hose
29. Recovery Tank
30. Cover
1 2 3 4
5
6
7
8
9
10
13
14
15
12
11
17
18
19
20
21
22
25
26
27
28
23
24
29
30
16

UNO-20FSB 6
OPERATOR MANUAL
PANEL COMPONENTS
1. Battery capacity indicator
2. Bush motor switch
3. Vacuum motor switch
1
2
3

7
OPERATOR MANUAL
UNO-20FSB
UNCRATING MACHINE
Be sure and check packing carton for any damage.
Immediately report any damage to carrier. Check
the contents of package to ensure that the
following items are included:
• Machine
• Requires 2-12V Batteries
• Squeegee assembly
• Battery Charger
• Pad Driver
INSTALLING BATTERIES
The batteries are already in the machine upon
delivery; However you will need to connect the
cables to the battery posts.
WARNING: Batteries emit hydrogen gas.
Explosion or re can result from hydrogen
gas. Keep sparks and open ames away! Keep
battery compartment open when charging.
1. Make sure vacuum motor and brush switch are
in the OFF position
2. Open recovery tank to gain access to battery
compartment.
3. Carefully place the two batteries into the
compartment as shown in gure below. Place
the battery brace at the rear of the two batteries.
DO NOT DROP BATTERIES INTO
COMPARTMENT!
4. Connect battery cables to posts in numbered
order as shown in drawing below.
RED to POSITIVE and BLACK to NEGATIVE.
MACHINE SET UP
PRE-OPERATION CHECKS
1. Sweep or dust mop the surface to be cleaned.
2. Check battery meter to make sure batteries are
fully charged. (See BATTERY CHARGING).
3. Check that squeegee is properly installed.
4. Check that brush / pad is properly installed.
INSTALLING PAD DRIVER OR BRUSH
1. Ensure that the machine is turned o󰀨.
2. Step down on the scrub head lift pedal (see
machine components, item #20) to raise the
scrub head o󰀨 the oor.
3. If using a Pad Driver, rst attach the appropriate
pad to the pad driver surface.
4. Turn the brush motor hub until the slot with the
spring clip is visible through the scrub head
window.
5. Mount the pad driver or brush to the brush
motor hub by lining up the three studs with the
three holes in the brush motor hub. Once in the
holes, rotate the driver toward the spring clip to
lock the pad driver into place.
If necessary, press down on the motor hub lock
pin (see machine componts, item # 8) to lock
motor hub in place.
MOUNTING THE SQUEEGEE ASSEMBLY
1. Lift the squeegee lift lever (see machine
components, item #26) to the upward position.
2. Mount the squeegee assembly to the squeegee
pivot bracket. Make sure the knobs are
completely seated into the slots before securing
knobs.
3. Connect the vacuum hose to the squeegee
assembly. Loop the hose by using the hose clip
provided.
4. Check the squeegee blades for proper
adjustment.
MACHINE SET UP & INSTALLATION

UNO-20FSB 8
OPERATOR MANUAL
FILLING THE SOLUTION TANK
The machine is equipped with a hose ll-port (see
machine components, item #14) at the rear of the
machine,and a bucket ll-port at the front of the
solution tank.(see machine components, item #6)
Fill the solution tank to the "16Gal" level on the
solution tank sight gauge. When using the bucket
ll-port, stop lling when the level reaches the
bottom edge of the ll-port.
NOTE: When lling the solution tank with a bucket,
make sure that the bucket is clean. Do not use the
same bucket for lling and draining the machine.
WARNING: Do not put any ammable
materials into solution tank. This can cause
an explosion or a re. Only use recommended
cleaning chemicals. Contact Dealer for
recommendations on proper chemicals.
WARNING: Do not operate machine
unless you have read and understand this
manual.
1. Lower squeegee assembly to the oor by
lowering the squeegee lift lever (see machine
components, item #26).
2. Lower the scrub head to the oor by stepping
on the scrub head lift pedal (see machine
components, item #20).
3. Turn the power button switch (see machine
components, item #20) to the on (I) position.
4. Check the battery meter (see Panel
components, item #1), if the battery is very
low, Please DO NOT continue to operate the
machine and recharge the batteries immediately.
5. To change solution ow use the ball valve to
increase or decrease ow rate .When ball valve
is in horizontal position,the solution ow is OFF
turn to vertical position for maximum ow rate.
NOTE: Solution will not begin to ow until
the control handle bail is pulled.
6. Turn on the vacuum motor switch (see Panel
components, item #3).
7. i20NBV: Pull the control handle bail (see
machine components, item #2) backwards to
start scrubbing by moving the machine forward.
NOTE: 45-60 meters (150-200 ft) per minute is
the recommended scrubbing speed.
8. To stop scrubbing, release the control handle
bail, raise the scrub head and the squeegee
assembly.
WARNING: Fire or Explosion Hazard. Do
Not Pick Up Flammable Materials or Reactive
Metals.
1. Go slow on inclines and slippery surfaces. Do
not operate the machine on inclines that exceed
5% (3°).
2. Do not keep the machine in the same position
with pad / brush spinning, keep the machine
moving to prevent damage to oor nish.
3. If the squeegee assembly leaves streaks on the
oor, raise the squeegee o󰀨 the oor and wipe
the blades down with a damp cloth. Pre-sweep
the area to prevent leaving streaks on the oor.
4. Pour a recommended defoamer into the
recovery tank if excessive foam appears.
WARNING: Do not allow foam to enter
the oat shut-o󰀨 screen, vacuum motor
damage will result. Foam will not activate the
oat shut-o󰀨 screen.
5. Occasionally check the battery meter (see
Panel components, item #1). When the battery
is very low, stop scrubbing and recharge the
batteries.
WARNING: When battery is very low, do
not continue to operate the machine. Battery
damage may result.
6. When the solution tank runs empty, raise the
brush head o󰀨 the oor. Keep the squeegee
down and continue to vacuum until all the dirty
water is picked up.
NOTE: See TANK DRAINING section to learn how
to drain recovery and solution tanks.
MACHINE OPERATION
WHILE OPERATING MACHINE

9
OPERATOR MANUAL
UNO-20FSB
CIRCUIT BREAKER
The machine is equipped with a resettable circuit
breaker (see machine components, item #21)
to protect electronic components. If the circuit
breaker should trip, it can't be reset immediately.
You must rst determine what caused the breaker
to trip, and allow electronic components to cool
down and then you can manually reset the circuit
breakers.
NOTE: Contact Dealer for machine repairs.
TANK DRAINING
1. Turn the machine o󰀨 on.
2. With the squeegee and scrub head in their "up"
position, transport machine to approved area for
draining tank(s).
DRAINING THE RECOVERY TANK
Any time scrubbing is completed, or when relling
solution tank, the recovery tank should be drained
and cleaned.
WARNING: If the recovery tank is not
drained when the solution tank has been
relled, foam or water may enter the oat shut-
o󰀨 screen and cause damage to the vacuum
motor.
1. While holding the drain hose (see machine
components, item #28) upward, remove the cap
and lower hose to drain.
2. Open the recovery tank cover and rinse out the
tank. Use a rag to remove any excess dirt.
3. Clean the oat shut-o󰀨 screen and debris tray
located in the recovery tank .
DRAINING THE SOLUTION TANK
Any time scrubbing operation is completed, the
solution tank should be drained and cleaned.
1. Pull the solution tank level hose (see machine
components, item #19) o󰀨 the hose tting, this
will allow the solution to ow freely into a bucket
or oor drain.
2. Remove the cover of the lter assembly (see
machine components, item #24) to drain the
solution tank, check the lter screen and clean
up it if necessary.
3. Rinse the solution tank with clean water after
every use. This will help prevent chemical
buildup and clogging of the solution lines.
4. After rinsing out the tank, securely reconnect
the tank level hose to the hose tting, replace
the lter assembly cover and be sure the lter
screen and the "O" ring is in the correct position.
WARNING: Fire or Explosion Hazard.
Batteries Emit Hydrogen Gas. Keep Sparks and
Open Flame Away. Keep Battery Compartment
Propped Open When Charging.
NOTE: Use only approved chargers with the
following specications:
• Automatic shut-o󰀨 circuit
• Deep cycle charging
• Output current of 10-20 Amps
• Output voltage of 24 volts
1. Place machine in a well ventilated area.
2. Turn the machine o󰀨.
3. If charging wet (lead acid) batteries check the
uid level before charging.
4. Connect the charger's AC power supply cord
(see machine components, item #33) to a
properly grounded receptable.
5. Prop up the recovery tank by the support
stand (see machine components, item #3) for
ventilation when charging.
6. The charger will automatically begin to charge
and will automatically shut-o󰀨 once the batteries
are fully charged.
7. Upon completion of charging, disconnect the
AC power supply cord.
WARNING: Before performing any
maintenance on the machine, be sure that
the power is turned o󰀨, or the batteries are
disconnected!
WARNING: Repairs are to be completed
by Dealer only. Any repairs completed by
unauthorized persons will avoid the warrenty.
BATTERY CHARGING
PREVENTATIVE MAINTENANCE

UNO-20FSB 10
OPERATOR MANUAL
DAILY MAINTENANCE
1. Remove pad driver/ brush and clean with
approved cleaner.
2. Drain recovery and solution tanks completely
and rinse out with clean water. Visually check
the recovery tank for debris and clean out as
necessary.
3. Raise the squeegee assembly o󰀨 oor and wipe
it down with a damp towel. Be sure to store the
squeegee in the up position.
4. Remove the oat shut-o󰀨 assembly and rinse it
out with clean water.
5. Clean machine with an approved cleaner and a
damp towel.
6. Recharge the batteries.
7. Check the condition of the squeegee blade
wiping edge, rotate blade if worn.
MONTHLY MAINTENANCE
1. Clean the battery tops to prevent corrosion.
2. Check for loose battery cable connections.
3. Inspect and clean the recovery tank cover seal.
Replace it if damaged.
4. Lubricate all grease points and pivot points with
silicon spray and approved grease.
5. Check the machine for loose nuts and bolts.
6. Check the machine for leaks.
MOTOR MAINTENANCE
1. Contact Dealer for any motor maintenance.
2. Motor should have the brushes checked every
250 hours. Brushes should be replaced when
they are worn to a length of 10 mm or less.
BATTERY MAINTENANCE
WARNING: Batteries emit hydrogen
gas and an explosion or re can result. Keep
sparks and re away from batteries at all times.
WARNING: Whenever servicing batteries,
be sure to wear protective gloves. Avoid
contact with battery acid at all times.
NOTE: For the best machine performance, keep
batteries charged at all times. Do not let them sit in
a discharged condition.
1. Always follow the battery charging directions as
outlined in the BATTERY CHARGING section of
this manual.
2. Keep battery tops and terminals free from
corrosion. A strong solution of baking soda
and water is the best way to keep the batteries
corrosion free. DO NOT ALLOW THE BAKING
SODA / WATER SOLUTION TO ENTER THE
BATTERY CELLS.
3. Use a wire brush with the baking soda solution
to properly clean the battery posts and
connections.
4. Check battery connections for wear and loose
terminals. Replace if necessary.
MACHINE STORAGE
1. Always store the machine indoors.
2. Always store the machine in a dry area.
3. Always store the machine in its upright position.
4. Always store the machine with the pad driver/
brush raised o󰀨 the oor.
5. Always store the machine with the squeegee
assembly raised o󰀨 the oor.
6. If storing in an area which may reach freezing
temperatures, be sure to drain all uids from the
machine prior to storage. Any damage caused
by freezing temperatures will not be covered by
the warranty.
7. Drain the recovery tank.
8. Drain the solution tank of all uid.

11
OPERATOR MANUAL
UNO-20FSB
ADJUSTMENT OF SQUEEGEE ASSEMBLY
Model: i20NBV
Tools: Offset spanner (17mm)
Gauge block (2mm)
For optimum squeegee blade performance, the
squeegee assembly casters might need to be
adjusted to the oor type and squeegee blade
wear.
Adjustment Process:
1. Turn o󰀨 the machine after you lower the squeegee
assembly down.
2. Clean up foreign matter or dirty surfaces on the
squeegee blades.
3. Check that the squeegee Blades are installed
correctly and not worn out or damaged.
(The assembly needs to be placed on a level
surface. And the front/rear squeegee should be close to the Horizontal plane).
4. Check the caster and adjust it to approximately 2MM.
To adjust the caster height, loosen the top nut with 17mm Spanner wrench and
Turn the adjustment nut until properly adjusted (Step 4). After adjusting, tighten
the top nut. Repeat step for the other caster.

12
OPERATOR MANUAL
UNO-20FSB
BASIC TROUBLESHOOTING
PROBLEM CAUSE SOLUTION
Machine will not
operate
Control handle bail not pulled Pull control handle bail
Batteries need to be charged Charge batteries
Bad batteries Replace batteries
Loose batteries connection Tighten the connector
Circuit breaker tripped Reset breaker
Faulty button switch Contact Dealer
Brush motor will
not operate
Scrub head is raised o󰀨 oor Lower scrub head
Faulty scrub head (up/down) switch Contact Dealer
Faulty control handle bail switch Contact Dealer
Faulty brush motor or wiring Contact Dealer
Worn motor carbon brushes Contact Dealer
Vacuum motor
will not operate
Faulty vacuum motor or wiring Contact Dealer
Worn motor carbon brushes Contact Dealer
Little or no
solution ow
Ball valve set too low or shut o󰀨 Turn on the ball valve
Solution ow control knob set too low or
shut-o󰀨 Adjust solution control ow knob
Clogged solution tank lter or solution
hose
Clean solution tank filter or flush out
solution hose
Clogged solution solenoid valve Remove valve and clean
Poor water pick
up
Recovery tank is full Drain recovery tank
Loose drain hose cap Tighten cap
Clogged oat shut-o󰀨 screen located in
recovery tank Clean screen
Clogged squeegee assembly Clean squeegee assembly
Worn squeegee blades Replace or rotate squeegee blades
Incorrect squeegee blade deection Adjust squeegee blade height
Loose vacuum hose connections Secure hose connections
Clogged vacuum hose Remove clogged debris
Damaged vacuum hose Replace vacuum hose
Recovery tank cover not in place Properly position cover
Damaged recovery tank cover seal Replace seal
Faulty vacuum motor Contact Dealer
Low battery charge Recharge batteries
Short run time
Low battery charge Fully recharge batteries
Defective batteries Replace batteries
Faulty battery charger Repair or replace battery charger

UNO-20FSB 13
OPERATOR MANUAL
TECHNICAL SPECIFICATIONS
MODEL i20NBV
Brush Assist
DIMENSIONS L 55.7 in / 1,415 mm
DIMENSIONS W 22 in / 560 mm
DIMENSIONS H 44.9 in / 1,140 mm
WEIGHT 210 lbs / 95 Kg
WEIGHT WITH BATTERIES 410 lbs /185 Kg
RECOVERY TANK
CAPACITY 17.2 Gal / 65 L
SOLUTION TANK
CAPACITY 15.9 Gal / 60 L
SQUEEGEE WIDTH 30 in / 762 mm
CLEANING PATH WIDTH 20 in / 500 mm (Disk)
PRODUCTIVITY RATE 19,375 ft2/ 1,800 m2h
DRIVE SYSTEM Brush Assisted
TRAVEL SPEED,
MAXIMUM N/A
MINIMUM AISLE TURN 63 in / 1,600 mm
PAD/BRUSH PRESSURE 65 lbs / 30 Kg Min
SOLUTION FLOW RATE 0 ~ 0.37 Gal / Min
0 ~ 1,400 ml / Min
BRUSH MOTOR 0.75hp / 0.55KW
180 RPM
VIBRATIONS @
CONTROLS N/A
VACUUM MOTOR 0.54hp / 0.4KW
WATER LIFT - AIR FLOW 45 in / 1,143 mm
BATTERIES 2-12, 105AH @ 20 hr
RUN TIME PER CHARGE 3 Hours
VOLTAGE DC 24V
DECIBEL RATE AT
OPERATOR'S EAR,
INDOORS
68dB(A)
GRADE LEVEL, MAX 5% (3°)

14
OPERATOR MANUAL
UNO-20FSB
RECOVERY TANK GROUP

UNO-20FSB 15
OPERATOR MANUAL
RECOVERY TANK GROUP
DIA
NO.
PART
NUMBER DESCRIPTION NO. REQ'D
1 8136003 RECOVERY TANK COVER 1
2 8131030 DRAIN HOSE 1
3 1962050 CLAMP 1
4 8111300 HINGE ASSEMBLY 2
5 1421618 FLAT WASHER M6×DIA18×1.6 10
6 1021616 HEX BOLT M6×16 10
7 8131020 CABLE 1
8 1221512 SCREW M5×12 2
9 1421510 FLAT WASHER M5×DIA10×1 2
10 8113009 NYLON, CLAMP 2
11 8111008 BRACKET 1
12 1421816 FLAT WASHER M8×DIA16×1.6 2
13 8111007 RECOVERY TANK SUPPORT 1
14 8115404 SLEEVE, P/M 1
15 1021830 HEX BOLT M8×30 1
16 8111015 FLOAT, SHUT-OFF 1
17 2320220 BEND 1
18 1321210 SCREW, SELF-TAPPING, ST4×10 4
19 2320216 COVER, CLEAR 1
20 2320218 GASKET, CLEAR WINDOW 1
21 1221410 SCREW M4×10 2
22 1421409 FLAT WASHER M4.3×DIA9×0.8 4
23 2320217 RUBBER HINGE 1
24 8111022 WARNING LABEL 1
25 2320216A CLEAR COVER, KIT 1

16
OPERATOR MANUAL
UNO-20FSB
VACUUM FAN GROUP

UNO-20FSB 17
OPERATOR MANUAL
VACUUM FAN GROUP
DIA
NO.
PART
NUMBER DESCRIPTION NO. REQ'D
1 8112005 GASKET, VACUUM MOTOR 1
2 1121605 HEX NUT M6 3
3 8112006 STUD M6×92 3
4 8112100 VACUUM MOTOR , 24VDC, 2-STAGE, KIT 1
5 1421612 FLAT WASHER M6×DIA12×1.6 3
6 1123608 LOCK NUT M6 3
7 1914300 TIE, NYLON, 5×300 1
8 8132007 MUFFLER, VACUUM MOTOR 1
9 1221512 SCREW M5×12 2
10 8133012 BRACKET 1

18
OPERATOR MANUAL
UNO-20FSB
SOLUTION TANK GROUP

UNO-20FSB 19
OPERATOR MANUAL
SOLUTION TANK GROUP
DIA
NO.
PART
NUMBER DESCRIPTION NO. REQ'D
1 8136002 SOLUTION TANK 1
2 8133007 CLEAN TUBING 1
3 1962025 CLAMP 16-25mm 1
4 8119005 BALL VALVE, G1/2 1
5 8119007 ELBOW G1/2 1
6 8113021 HANDLE, CONNECTOR 1
7 8113020 CONNECTOR 2
8 8114731 BATTERY CONNECT CABLE, ASSEMBLY 1
9 8113013 SPACER, BATTERY 2
10 - CONTACT ICE USA FOR BATTERY PART NUMBER 2
11 8113012 BATTERY TRAY 1
12 8114750 BATTERY CONNECT CABLE, BLACK 1
13 8114751 JACKET, BATTERY TERMINAL, BLACK 4
14 1421510 FLAT WASHER M5×DIA10×1 11
15 8119100 FILTER ASSEMBLY 1
16 8050152 SEAL 1
17 1321210 SCREW, SELF-TAPPING, ST4×10 2
18 8050153 CHAIN 1
19 8050156 LID, SOLUTION TANK FILL PORT 1
20 8050150-BK LID, KIT 1
21 8113009 NYLON, CLAMP 7
22 1123305 LOCK NUT M3 2
23 8113010 BRACKET, CONNECTOR MOUNTING 1
24 1434300 LOCK WASHER, TOOTH, M3 2
25 1211325 SCREW M3×25 2
26 8134783 BATTERY CONNECT CABLE, ASSEMBLY 1

20
OPERATOR MANUAL
UNO-20FSB
SOLUTION TANK GROUP
DIA
NO.
PART
NUMBER DESCRIPTION NO. REQ'D
27 1422513 LOCK WASHER M5 2
28 1321110 SELF-TAPPING SCREW ST3.5×10 1
29 1421409 FLAT WASHER M4×DIA9×0.8 1
30 8133002 CAP, SOLUTION FILL 1
31 1221512 SCREW M5×12 3
32 8133027 LABEL,BALL VALVE 1