LDPower W108 Screen Instrument Specification

1. Product Name

Screen instrument, model W108.

2. Specifications and Parameters

• 36V / 43V / 48 / 52V DC power supply
• Instrument rated working current of 10 mA
• Maximum working current of the instrument is 30 mA
• Shutdown leakage current is <1 uA
• Operating current of the supply controller end is 50 mA
• Usage temperature: -20~45°C
• Storage temperature: -30~70°C
• Waterproof grade: IP65
• Storage environment humidity: 30%-70%

3. Appearance, Material and Size

A. Appearance Material

Product shell adopts black PC material, display window adopts PC transparent material, button adopts silicone rubber material, and support adopts black PC material.

b. Appearance Size

Diagram showing dimensions: Overall width 107.00mm, height 69.30mm, depth 58.40mm. Display area width 88.00mm, height 45.80mm. Mounting bracket diameter 31.80mm.

4. Instrument Installation

Attach the meter to the handlebars and adjust for the right view. In case of power failure of the electric bicycle, insert the instrument connector with the connector corresponding to the controller to complete the installation.

The instrument is suitable for three kinds of handlebars specifications: 31.8mm, 25.4mm, 22.2mm. Customers can choose according to their actual needs. Among them, 25.4mm and 22.2mm need to be matched with the corresponding transfer ring. The assembly of the transfer ring is directional. Pay attention to the opening direction of the connecting ring, which must be installed in the direction of the drawing.

Diagram showing mounting bracket components and assembly direction.

5. Overview of Functions

1. Power gear adjustment and indication.
2. Speed display (including maximum speed and average speed, public mile unit switch).
3. Single ride time and clock are shown.
4. Mileage display (including single mileage, total mileage).
5. Help to implement control and display.
6. Headlamp switch control and indicator.
7. Battery information to view.

6. Display Instructions

The display interface shows:

• Battery level indication
• Normal mode indication
• Boost gear indication
• Walking boost indication
• Time display
• Speed indication
• Speed unit
• Mileage Display Unit Mileage
• Total Mileage Indicator
• Indicator of single trip

Diagram illustrating the display interface with various indicators like battery level, assist level, speed, time, trip, and total mileage.

7. Keys

Diagram showing the control buttons: MODE, +Key, -Key, with icons representing power, plus, and minus.

8. Operation

A. Boot and Shutdown

Long press the "MODE" key to boot up. Long press the "MODE" key to shut down. Suggestion: If the electric car is not used for more than 4 hours, please remove the battery and store it properly.

b. Switch between cycling gear position and booster mode

Switch cycling gear: press the "+" key to increase the gear, press the "-" key to reduce the gear.

Enter and exit boost mode: in the power-on state, press and hold the "-" key for about 3 seconds to enter the walking boost mode, and release the "-" button to return to the cycling gear.

Warning: Walking boost mode is only suitable for use on walking carts, do not use during cycling.

c. Turn the backlight on and off

In the boot state, press "+" for 2 seconds to turn on the backlight, and then press "+" for 2 seconds to turn off the backlight. If the car is equipped with front/rear headlights, they will be turned on or off together with the backlight.

d. Single mileage zero

In the boot state, press and hold down the "MODE" key and "-" key for 2 seconds to reset the single mileage to zero.

e. Single mileage / total mileage switch

In the boot state, short press the button to switch between single mileage and total mileage display.

The display interface shows the current status, including battery level, assist level, time, speed, trip mileage, and total mileage.

f. Battery status

The remaining capacity of the battery is displayed with corresponding icons indicating percentage ranges: <20%, 20%-40%, 40%-60%, 60%-80%, 80%-100%.

9. Regular Settings

a. Km / mile system setup

After boot, press the "+" and "-" keys simultaneously. After 3 seconds, enter the general setting state. Short press "+" or "-" to switch between km and mile. The setup interface is shown.

Diagram illustrating the km/mile selection interface.

b. Speed limit setting

After selecting km/mi, short press "MODE" key to enter the speed limit setting. Short press "+" key to increase the speed limit, and short press "-" key to reduce the speed limit. The setup interface is shown.

Note: The motor output power continues to attenuate when the wheel speed reaches or exceeds the set value. For cycling safety, it is recommended to set the speed limit at 25 Km/H and below.

c. Backlight brightness setting

After selecting the speed limit, short press "MODE" key to enter the backlight brightness setting. Short press "+" key to increase brightness, short press "-" key to reduce brightness. Setting range: 1-8. The interface is shown.

Diagram illustrating the backlight brightness setting interface.

d. Clock Settings

After selecting backlight brightness, press "MODE" key to enter clock setting. Set the hour (24 hours) by pressing "+" to increase and "-" to decrease. After selecting the hour, press "MODE" to enter minute setting, press "+" to increase and "-" to decrease the minute value. Press "MODE" to exit. The setting interface is shown.

Diagram illustrating the clock setting interface.

Note: After parameters are set, the instrument needs to be switched on and off for the settings to take effect.

10. Advanced Settings

a. Wheel diameter setting

After boot, press the "+" and "-" keys simultaneously. After 3 seconds, release all keys, then press "+" and "-" keys again, and then press the "MODE" key 8 times to enter advanced settings. The first setting is wheel diameter (unit: inch). Short press "+" to increase, short press "-" to decrease. Setting range: 8-32 inches. The setup interface is shown.

Diagram illustrating the wheel diameter setting interface.

b. Automatic power-off time setting

After selecting the wheel diameter, press "MODE" to enter automatic power-off time setting. Press "+" to increase and "-" to reduce the automatic power-off time. Setting range: 0-60 minutes. When the car has no action within the set time, the meter will automatically shut down and power off the instrument and controller. The setup interface is shown.

Note: If the automatic power-off time is set to 0, it means the power will not turn off automatically and must be manually switched off.

c. Total digit setting

After selecting the power-off time, press "MODE" key to enter the master level setting interface. 3 / 5 / 9 file is optional, as illustrated in the following figure.

Diagram illustrating the total gear number setting interface.

Note: Total gear number does not include parking gear (0). For example, if the total gear number is set to 3, the actual gear numbers are 0, 1, 2, 3. After parameters are set, the instrument needs to be switched on and off again for the settings to take effect.

d. Fault code display

When the electric control system of the electric vehicle fails, the instrument will automatically display the error code. Refer to the error code definition table for details. The fault code display interface is shown.

Diagram illustrating the fault code display interface.

11. Battery Communication

The battery communication shall display the information as follows:

12. Error Code Definition Table

13. Definition of Outgoing Qualification