User Manual_JUST-TWO LCD Display
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, setup, and normal operation. It will also help to limit any confusion and assist in you resolving any malfunctions.
2. Appearance, dimensions, and material
Just-Two housing material is made from PC plastic with a working temperature range of -20℃ to 60℃. The color can be either white or black. This material ensures the good mechanical performance of the product.
3. Function summary
JUST TWO shows items as below:
- Battery indicator (remaining distance)
- Speed showing (real-time speed)
- Riding duration
- Trip distance (sing trip & ODO)
- Error code list
- Energy burned
- USB charging state
4. Normal monitor area
5. Precautions
Do not plug in and plug out the display when it is working.
Avoid being hit
Send display to after-sales instantly once find faulty
6. Assembly instruction
This model integrates stem and display as one unit. So please fix it with the bike frame when assembly. Then connect the display and controller with plugs.
7. Normal Operation
7.1 ON/OFF
There is a vibration switch inside the battery, so the 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.
7.3 Battery indicator
When the battery is full, 5 bars are all on. When the battery is short of power, the frame of the sign will flash. It means the battery is under voltage, which needs to be recharged immediately.
7.4 USB charging
The display is with a USB port, used for mobiles, outputting of 600mA. When the bike is rented, please connect the display and cell phone by cable to enable charging and the indicator will be on.
At any state, disconnecting will end the charging.
7.5 Temporary parking
When you stop the bike and lock it, the display will show the locking state by the flashing sign.
7.6 Remaining distance
After power on the display, it shows the remaining distance as default, to warn the riders of the remaining range.
7.7 Error code list
When the electric system is working wrongly, the display will show an error code. Only when the faulty is fixed, it will exit the faulty working interface
Error code list and definition:
| Error code | Definition | Solution |
| 21 | Abnormal current | check whether 3 phases are short circuit |
| 22 | Throttle fault | check whether the throttle goes back to the initial stage |
| 23 | Lack of motor phase | check whether the wiring layout is ok; check whether the phase wire is connected to the controller properly |
| 24 | Abnormal hall sensor of the motor | controller without hall: check the layout of the phase wire controller with hall: check the layout of the phase wire |
| 25 | Brake defect | check whether the brake goes back to normal position before powering on |
| 30 | Abnormal communication | check whether the display and controller are connected |
Note: Here is a more general error code for different e-system for your reference.
8. FAQ
Q： Why can’t turn on the display?
A： Please check if the cable is well connected to 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
- We are not responsible for the scratched or broken shells after the products are delivered out of the factory. We don’t repair scratched or broken lead wires.
- The LCD display function warranty is 24 months from the shipping date of the display out of the factory.
The following circumstances are not covered by the Warranty.
- Opened case
- Damaged connector
- Scratched or damaged case after delivery
- Scratched or damaged cables
- Malfunctions or damage caused by force majeure or natural disasters
- Outside the warranty period
10. Version
This operating instruction is general-purpose software (version V1.1). Some of the versions of the e-bike LCD may have slight differences, depending on the specialized display.
