xsto CT420 User manual

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OPERATION MANUAL
HEAVY LOAD POWERED STAIR CLIMBER
CT420

CATALOG
1 Symbols and safety instructions........................................................................2
2 Description...............................................................................................................4
2.1 The structure..................................................................................................4
2.2 Technical data............................................................................................... 5
2.3 Application fields........................................................................................... 5
2.4 Technical Parameters...................................................................................5
2.5 Dimension.......................................................................................................7
2.6 Standard Supply Accessories..................................................................... 7
3 Operation.................................................................................................................. 8
3.1 Check Before Using CT420.........................................................................9
3.2 Usage of Handheld Controller...................................................................10
3.3 Adjustment of Handrail and Strap Holder................................................12
3.4 Operate on Flat Ground............................................................................. 13
3.5 Adjust loading board...................................................................................14
3.6GoUpstairs.................................................................................................. 17
3.7 Downstairs....................................................................................................20
3.8 Turning operation on flat ground or platform.......................................... 23
3.9 Parking..........................................................................................................24
4 Maintenance...........................................................................................................24
4.1 Battery pack................................................................................................. 24
4.2 Recycling......................................................................................................28
4.3 Precautions for care and use.................................................................... 28
4.4 FAQ............................................................................................................... 30
5 Packaging box and shipping instructions.....................................................36
6 Warranty and responsibility...............................................................................37
6.1 Warranty....................................................................................................... 37
6.2 Responsibility...............................................................................................38

1 Symbols and safety instructions
WARNING ------ May cause serious injuries or death!
CAUTION ------ May cause slight injury!
NOTE ------ May cause machine damage!
Read the user’s manual and pay attention to the warning and
safety instructions before operation.
Check the electronic functions, battery capacity and crawler
tracks.
Store the CT420 in an environment above 0℃for at least
one hour before operation.
Read the technical parameters carefully. Do not exceed the
rated weight.
Only trained person can operate CT420. The operator should
be in health both physically and mentally.
When stair climber the machine is going up and down, other
personnel shall not stand under the machine .
Antiskid shoes are required. It must be operated with two
hands. Run the pilot operation without load and at low speed.
Make sure there are no obstacles on the stairs and the steps
are not slippery。
Only for carriage of cargo, not for persons. Safety trap must
be used to secure the cargo.
Do not reach under the load plate or touch the rotating part
and track.
Do not use the CT420 in rainy, wet, snowy or icy condition
and sideslip or other potential dangers may be caused.
Do not use CT420 if the crawler track is broken.
Do not use CT420 on road that is slippery or with barrier.

Do not use the CT420 on the escalators or moving belts.
Turn off the CT420 immediately if the drive part is stuck.
Make sure the power is off during transportation and the
relative laws and regulations are followed.
Keep the battery plug-in dry. Protect the charger and the
charging cable from oils, diluents and items with sharp edges.
Do not use high-pressure cleaner. Store it in dry condition.
For repair or maintenance please contact with the agency or
distributor authorized by XSTO CO., LTD.
Outer factor such as sunshine may lead to surface heat. Keep
away from the inflammables.
The CT420 may interfere the induced electromagnetic field of
electronic equipment (such as security system of department
store).
Only the accessories provided by XSTO CO., LTD. can be
used.

2 Description
2.1 The structure
CT420 Heavy Load Powered Stair Climber
1: retractable aluminum alloy frame 2: removable battery pack 3：
aluminum alloy loading board 4: caster 5: crawler track 6:
handheld controller 7: rotatable handle 8: retractable positioning
pins 9: adjustable strap holder 10: base 11: turn indicator
1
2
3
4
5
10
6
9
7
8
11

2.2 Technical data
This user manual is for CT420 series ONLY.
2.3 Application fields
This series of products are new type of stair climber that can
transport heavy goods to go up and down the stairs. The main
application areas are logistics, express delivery, house moving,
carrying large furniture appliances and special equipment upstairs;
it can also be used in factories, offices, residential buildings,
outdoor stairs and other places.
2.4 Technical Parameters
Stair Climber CT420 Technical Parameters
Model CT420
Size
Height: MIN 1130 mm, MAX 1620mm
Width: 614 mm
Length: 1030 mm
Weight Main Body: 92 kg
Battery pack: 3.1 kg
Rated Capacity 420 kg
Climbing speed
（420kg load）
Low speed：10.3 steps/min
High speed：12.8 steps /min
Downstairs speed
（420kg）
Low speed :13.3 steps/min
High speed:16.2 steps/min
Motherboard type Type A
Battery capacity 78-100 floors (1400-1600 steps)
Folding form Handrail retracted and rotated
Max. Height of step 210 mm
Min. width of the step Machine + cargo +100mm
Min platform size 1500mmx1500mm (turning stairs)

Battery type Lithium battery pack
Battery parameters 25.9V, 17.5AH
Charging parameters Input: 100-240V；Output: 29.4V * 4A
Walking motor/set
（total two）DC motor 24V 300W*2
Electronic push rod 24V 300W 12000N
Noise level <70dB (1m horizontal distance measurement)
Storing/operating
temperature of
device
-5℃~35℃/0℃~40℃
Storing/operating
temperature of
battery
-5℃~35℃/0℃~40℃
Serial number See the body nameplate
Protection level IP54
Lifespan 3years/50000steps
Note：CT420 parameters are suitable for ambient temperature
25℃. In a low-temperature environment, the load and endurance
will be reduced. If the low-speed mode is started, the endurance
will be reduced accordingly. This product is recommended to be
used within 1000 meters above sea level. It is recommended to
use under ambient humidity range of 45%-85% (no frost or snow).
WARNING ：The center of gravity for the cargo should be
located in the center of the loading board. If the center of gravity
of the cargo exceeds the loading board, it should not be
transported by using the CT420.

2.5 Dimension
2.6 Standard Supply Accessories
1
Main Body 2 Battery Pack 3 Charger, 24V
(for Lithium battery Only）
4
Safety Strap 5 Strap Holder

3Operation
Note—Please put the machine in the environment
without freezing(above 0 ℃) before initial operation!
Warning——Only trained person can operate CT420.
Warning——Pilot operation must be carried out with no
load and in low speed mode！
Warning——The goods must be fastened with straps!
Warning——Practice operating the machine with cargo
of 50-100 kg until you are fully skilled in controlling the
machine.
Warning——When going up and down the stairs, under
the non-automatic adjustment mode of loading board, pay
attention to the center of gravity for the goods to ensure the
load balance!
Warning—— Operate it with two hands! Especially when
approaching the last step upward and the first step
downward.
Warning——When the slope of the ground is bigger than
5°, it is forbidden to use the flat ground model by using the
caster to move!
Warning——When the machine is in operation, do not
place your body parts close to the mechanical positions
such as the track, the loading board and the cover, otherwise

personal injury may occur!
Warning——Different goods have different centers of
gravity. For special goods (such as oversize, the center of
gravity is biased to the outside of the loading board, etc.),
manually adjust the tilt angle of the loading board to ensure
safe operation!
3.1 Check Before Using CT420
Warning
Stop operation when the following issues occur and contact
manufacturer or local dealer for CT420 repair.
（1）The battery has been fully charged, but the handheld
controller still shows low power.
（2）After the power is turned on, press the handheld
controller switch and there is no response.
（3）Press the handheld controller button, and find the
function is inconsistent with the manual function, or the
function is missing.
（4）The rotating positioning body at the handrail cannot be
adjusted or cracks and damages are identified.
（5）The height of handrail cannot be adjusted or locked.
（6）
Cracks and crevasses are identified on the crawler track,
or the track deviates the gear during functioning.
（7）CT420 makes abnormal sound during functioning.
（8）Switch on the battery and the universal wheel touches
the ground, press the "M " for the first time to make CT420 in
the automatic adjustment mode of the loading board,
however the loading board cannot be adjusted to 9 ~ 11°
from the horizontal level.

Please stop the CT420 if there is any damage to the
remaining parts or abnormal vibration of the machine which
difficult to determine whether the machine can be used
safely during functioning.
3.2 Usage of Handheld Controller
3.2.1 Button function of handheld controller
Joystick: control the CT420 to move forwards and backwards
or to flip the loading board.
Turn left/right light: Press once, the light flashes for 20
seconds, and press then turn off.
Loudspeaker: it can be operated by jog or long press for
warning.
Joystick
Track running /
loading board
ad
j
ustment
Loading board
automatic
ad
j
ustment /cancel
Turn left light
Speed
do
wn
L
oudspea
k
er
Power
switch
LCD display
Speed
up
Track running
mode and loading
board manual
ad
j
ustment mode
Turn right light

Speed down/up：there are five level, and the speed gradually
increases from level 1 to 5.
3.2.2 Track running mode and loading board manual
adjustment mode
As shown in the upper left corner of the left figure, the
symbol in the red box will appear under automatic mode, and the loading
board will adjust the angle automatically. Othervise, the symbol in the red
box will disappear.
Track walk mode:
display power and
track speed. Go
forward and
backward, turn,
go upstairs and
downstairs with the
j
o
y
stick.
Loading board manual
adjustment mode:
loading board angle
can be adjusted
manually with the
joystick.

3.3 Adjustment of Handrail and Strap Holder
The CT420 has a rotating
positioning body, which can be
adjusted by loosening the L-type
handle.
After adjusting the handle to a
suitable position, the L-type
handle is locked to complete
the angle adjustment of the
handle.
At the same time, by pulling the
positioning pin, the back panel
can be extended and retracted,
and the height of the armrest
can be adjusted.
Handheld controller with clip
can be clipped on blue
silicone tube and adjusted at
different angles.
The strap holder can be
removed and installed at any
height, suitable to fix goods
of different heights.

3.4 Operate on Flat Ground
3.4.1 OperateonflatgroundThe bottom of CT420 has casters
for walking on flat ground. Adjust
the loading board to the smallest
angle, which will enable the casters
touch the ground. And then the
operator can push the handle to
move CT420 forward on flat
ground. This way can be applied on
flat ground ONLY.
Warning：When the slope of
thegroundisbiggerthan5
°,it
is forbidden to use the flat
ground model by using the
caster to move!
3.4.2 Track walks on flat ground
The CT420 can walk on flat ground
with crawler tracks. Switch to the
loading board manual operation
mode, raise the loading board to an
angle till the crawler tracks touch
the ground, and then the operator
can move the machine by
controlling the joystick.
This way is applied to short
distance walk or on uneven road
surfaces.

3.5 Adjust loading board
3.5.1 Loading board manual adjustment mode/automatic
adjustment mode.
3.5.2 Change the automatic adjustment angle of the loading
board Mode 1: Under the manual
adjustment mode of the loading
board, the state of Handheld
Controller is shown in the
picture, manually adjust the
turning angle of the loading
board to a proper angle by
operating the Joystick, then
switch to automatic adjustment
mode ,CT420 will memorize the
angle of the loading board
automatically .
As shown in the upper left
corner of the left figure, when
the symbol light marked by red
wireframe light up, it indicates
that the loading board of the
CT420 automatic adjustment
mode is working. When in
manual adjustment mode, the
symbol light goes out.

Mode 2: Under the automatic
adjustment mode of the loading
board, the state of Handheld
Controller is shown in the
picture, manually adjust the
turning angle of the loading
board to a proper angle by
operating the Joystick, then
release the rocker and keep the
angle. CT420 will memorize the
angle of the loading board
automatically.
3.5.3 The notes for angle adjustment of the loading board
(1)Effective range of automatic angle adjustment: 7°to 30°
When CT420 is under automatic adjustment mode, if the horizontal angle of
the loading board is adjusted to less than 7°or more than 30°, CT420 will
automatically adjust the angle of the loading board to raise loading board to 7° or
lower the loading board to 30°.
When CT420 is in the manual mode, if the horizontal angle of the loading
board is adjusted between 7°and 30°and enters the automatic mode, CT420 will
automatically adjust the angle based on the current angle. If the loading board
enters the automatic mode with an angle greater than 30°, the loading board will
be depressed to 30°(In case of less than 7°, see the second precautions).
(2) Restore the last used auto angle
When the CT420 switches to manual mode from automatic mode, CT420
will retain the horizontal included angle of loading board during mode switching
(assuming the angle is 15°).
When the CT420 is under manual adjustment mode and the horizontal
included angle of the loading board is less than 7°. Then switch to the automatic

adjustment mode, the loading board will be adjusted to the angle when the last
automatic adjustment mode is switched to the manual adjustment mode (the
angle of the previous section is restored to 15°).
Note: this angle is not saved after the machine is powered off, and is only
valid when the machine is continuously used after power on.
(3) When the machine (lithium battery switch) is powered on, the
automatic adjustment default angle is : 10 °
After the CT420 (lithium battery switch) turns on, it switches to the
automatic adjustment mode for the first time with the horizontal angle less than
7°. At this time, The CT420 will adjust the horizontal angle of loading board to
10°.
Switch to the automatic adjustment mode when it is more than 7°, and the
adjustment of the loading board shall be subject to the 3.5.1（1）.
(4) If it is found that the Handheld Controller is in the state of
speed limit for a long time, or there is a continuous buzzer alarm
sound from the CT420, please stop using the machine, and refer
to the maintenance manual for fault detection.

3.6 Go Upstairs
3.6.1 Start the CT420 stair climber
For the first use, you need to
insert the plug under the battery
base. In the daily use since then,
there is no need to insert or to
remove the plug.
Insert the 24V battery pack and
turn on the battery switch.
Note: Before turning on
the battery switch, make sure
the battery is inserted in the
battery holder and the power
cord is connected well.
Turn on the handheld controller
switch; Click once to start the
controller screen display; click
again to shut it down.

3.6.2 Initial position Make sure the goods is fixed
securely, move CT420 to the edge
of the stairs and make sure the
two tracks lean against the edge of
the first stair. Turn on loading
board automatic adjustment mode
on handheld controller, set speed
1, go upstairs by tracks.
3.6.3 At the beginning of going upstairs
CT420 will walk slowly
before it finally gets off the
ground. Under loading board
automatic adjustment mode, the
process will slow down the move.
Under the manual control mode,
shift between “track walk” mode
and“loading board manual
adjustment” mode, make sure the
machine going up slowly, while
maintaining the balance of the
loading board.
3.6.4 Going upstairs smoothly When CT420 gets off the ground
totally, it can go upstairs
smoothly, then cancel automatic
mode and turn to manual mode.
If CT420 goes upstairs unstably,
adjust manually the loading board
rotating angle according to

different cargo gravity so that
CT420 can go upstairs smoothly.
Then you can increase the speed.
3.6.5 Climb the last THREE steps
When CT420 goes up to the edge
of the last stair, turn speed to 1.
Turn to loading board automatic
mode by handheld controller.
Moreover, pull the CT420 armrest
and find the balance position
gradually until the CT420 can be
easily flipped back and forth. Hold
the CT420 handle with both
hands, pull the CT420 back
slowly, make the CT420
automatically adjust the angle to
recover the loading board until
the tracks return close to the
upper platform.
Then use the joystick to move
up further.
Warning: There is potential risk when CT420 moves up
to the highest stair on every floor. CT420 may roll over
forward or backward. Keep people and goods far away the
machine. When a rollover is inevitable, loosen the armrest