King-Meter JUST TWO User manual

KING-METER
JUST TWO
USERS GUIDE

Contents

1. Preface .......................................................................................................................................... 3
2. Appearance, dimensions and material ...................................................................................... 3
3.Function summary ....................................................................................................................... 3
4. Normal monitor area .................................................................................................................. 4
5. Precautions .................................................................................................................................. 4
6. Assembly instruction ................................................................................................................... 5
7. Normal Operation ....................................................................................................................... 5
7.1 ON/OFF .............................................................................................................................. 5
7.2 speed/distance（real time speed/single trip/ODO） .......................................................... 5
7.3 Battery indicator .................................................................................................................. 6
7.4 USB charging ...................................................................................................................... 7
7.5 Temporary parking .............................................................................................................. 8
7.6 Remaining distance ............................................................................................................. 8
7.7 Error code list ...................................................................................................................... 9
8. FAQ ............................................................................................................................................ 10
9. Guaranty and warranty scope ................................................................................................. 10
10.Version ....................................................................................................................................... 10

1. Preface
To ensure the best performance of your e-bike, please read through the JUST TWO product
introduction carefully before use. This user manual covers: Hardware installation, set up and
normal operation. It will also help to limit any confusion and assist in you to resolve any
malfunctions.
2. Appearance, dimensions and material
Just-Two housing material is made from PC plastic with a working temperature range: -20 to ℃
60 . The color can be either white or black. This material ensures good mechanical performance ℃
of the product.
3.Function summary
JUST TWO shows items as below：
◆battery indicator (remaining distance)
◆speed showing (real time speed)

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d
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4.
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ing duratio
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r
ip distance (
r
ror code list
n
ergy burned
U
SB charging
N
ormal
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P
recautio
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ot plug in a
n
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sing trip &
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state
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onitor a
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d plug out d
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ea
JUST
i
splay when
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TWO moni
t
i
t is working.
t
or area

Avoid being hit
Send display to after sales instantly once find faulty
6. Assembly instruction
This model integrate stem and display as one unit. So please fix it with bike frame when assembly.
Then connect the display and controller by plugs.
7. Normal Operation
7.1 ON/OFF
There is vibration switch inside the battery, so system can be started by vibration, without any
button on display.
7.2 speed/distance（real time speed/single trip/ODO）
After power on the display, it shows real time speed as default. It shows in turn as below: riding,
duration, single trip, ODO, energy burned.

duration（TIME） single trip（TRIP）
Total distance（ODO） energy burned（Fat）
7.3 Battery indicator
When the battery is full, 5 bars are all on. When battery is short of power, the frame of the sign
will flash. It means the battery is under voltage, which need be recharged immediately.

Full Low Under Voltage
7.4 USB charging
The display is with USB port, used for mobiles, outputting of 600mA. When bike is rented, please
connect display and cell phone by cable to enable charging and the indicator will be on.
At any state, disconnecting will end the charging.
USB charging window

7.5 Temporary parking
When you stop the bike and lock it, display will shows the locking state by the flashing sign.
Window of temporary parking
7.6 Remaining distance
After power on display, it shows remaining distance as default, to warn the riders of remaining
range.
Remaining distance

7.7 Error code list
When the electric system is working wrongly, display will show error code. Only when the faulty
is fixed, it will exit faulty working interface
Error code window
Error code list and definition：
Error code definition solution
21 Abnormal current check whether 3 phase are short circuit
22 Throttle defect check whether throttle go back to initial stage
23 Lack of motor phase
check whether wire layout is ok
check whether phase wire is connected with controller
p
roperly
24
Abnormal hall sensor of
motor
Controller without hall：check layout of phase wire
controller with hall：check layout of phase wire
25 Brake defect
check whether the brake go back to normal position before
p
ower on
30 Communication defect
Check whether display and controller is connected
p
roperly

8. FAQ
Q：Why can’t turn on the display?
A：Please check if the cable is well connected with the controller.
Q：How to deal with the error code display?
A：Contact the e-bike maintenance station in time.
9. Guaranty and warranty scope
1. We are not responsible for the scratched or broken shell after the products are delivered out of
the factory. We don’t repair scratched or broken lead wires.
2. The LCD display function warranty: 24 months from the shipping date of the display out of the
factory.
The following circumstances are not covered by the Warranty.
1. Opened case
2. Damaged connector
3. Scratched or damaged case after delivery
4. Scratched or damaged cables
5. Malfunctions or damage caused by force majeure or natural disasters
6. outside the warranty period
10.Version
This operating instruction is general-purpose software (version V1.1). Some of the version of the
e-bike LCD may have slightly difference, depending on the specialized display.