DKD LCD Display Speedometer User Manual

1. Introduction

The SiAECOSYS DKD LCD Display is a digital speedometer designed for electric scooters and motorcycles. It provides essential riding information such as speed, driving distance, voltage, and electric quantity. This display supports both LIN and CAN-BUS communication protocols, making it compatible with various controllers, including Fardriver and VOTOL.

Important Note on Communication Protocols:

• LIN Communication: The controller can match with the speedometer to display battery voltage.
• CAN-BUS Communication: The controller can match with the speedometer (using SiAECOSYS CAN protocol) to display battery State of Charge (SOC). If the battery protocol does not match the speedometer, the display will consistently show a low battery indication. It is recommended to use the LIN communication version if a compatible CAN-BUS battery is not available.

2. Specifications

3. Package Contents

The package includes:

• 1 x DKD LCD Speedometer (adjustable)

4. Installation

4.1 Mounting

Mount the DKD LCD Display securely on your electric scooter or motorcycle dashboard. Refer to the mounting dimension diagram for proper fitment.

4.2 Wiring

Connect the speedometer to your controller using the provided wiring harness. Ensure correct pin assignments as detailed in the wiring diagram below. The connector type is 5557-2*10.

5. Operation

5.1 Initial Setup

The speedometer can automatically identify whether the controller uses One-line or CAN-BUS communication upon startup. Interactive recognition is not possible during operation.

5.2 Function Settings

The DKD Display features two buttons on the back for navigation and setting adjustments. The left button is for adjusting data, and the right button is for shifting or exiting menus. A long press on the right button exits the current setting.

To access settings, press the left button to start the speedometer. This will enter the password setting interface, showing 'CC---'. Press the left button again to input the password, and the right button to shift between digits.

Below are common password settings:

• Password 153: Set circumference, pole pairs, offset, and units (mm). Default circumference is 1413. After setting circumference, long press the right button to enter pole pairs and offset setting. Default pole pairs is 28 (for mid-drive motor, pole pair setting should be: pole pair * reduction ratio). '08' means offset.
• Password 256: Select 2-speed gear or normal 3-speed gear. '-2' is 2-speed, '-0' is normal 3-speed gear.
• Password 372: Reset ODO (odometer). Limit 3 times.
• Password 856: Select voltage range (60V/72V/96V/48V). Synchronizes with battery bar. If a matched lithium battery has a compatible CAN-BUS protocol with the speedometer, it will read the SOC accurately. Otherwise, the speedometer will read the battery voltage. When using a lead-acid battery to replace a lithium battery, the speedometer needs to re-power.
• Password 879: Fixed voltage calibration (60V/72V/96V/48V), corresponds to settings.
• Password 824: Self-input voltage calibration.
• Password 974: KPH and MPH switchover.
• Password 928: Shut off the D/N/R indicator light.
• Password 919: Change to show undervoltage. 'Front is full voltage, back is undervoltage'.

5.3 Default Speed Settings (Example)

For optimal speed display, especially with QS138 3kw 12inch assembly, the following default settings are recommended:

• Wheel tire size: 130/70-12
• Pole Pairs: 5
• Gear Ratio: 1: 4.77
• Voltage: 72V (20s Lithium battery)

6. Maintenance

• Cleaning: Use a soft, damp cloth to clean the display surface. Avoid abrasive cleaners or solvents that could damage the screen or casing.
• Inspection: Periodically check all wiring connections to ensure they are secure and free from corrosion or damage.
• Environmental Conditions: Avoid exposing the display to extreme temperatures, direct sunlight for prolonged periods, or excessive moisture.

7. Troubleshooting

• Display Not Powering On: Check all power connections (Battery+ and Battery- wires) to ensure they are correctly connected and receiving power.
• Incorrect Speed Reading: Verify the wheel tire size, pole pairs, and gear ratio settings (Password 153) are correctly configured for your vehicle.
• Battery SOC Display Issues (CAN-BUS): If the battery SOC is always showing low or incorrect, ensure your battery's CAN-BUS protocol is compatible with the speedometer. If not, consider using the LIN communication version or displaying battery voltage instead.
• Error Indicator: The display includes an 'Error' indicator. If this light illuminates, check your controller and motor for any fault codes or issues. Consult your controller's manual for specific error diagnostics.
• Buttons Unresponsive: Ensure the buttons are not stuck and are clean. If issues persist, re-power the display.

8. User Tips

• Battery Display Accuracy: For accurate battery State of Charge (SOC) readings, ensure your battery's CAN-BUS protocol is compatible with the speedometer. If not, the display will default to showing battery voltage, which might not reflect the true SOC.
• Customization: Take advantage of the adjustable settings (circumference, pole pairs, gear ratio) to fine-tune the speedometer's accuracy for your specific electric vehicle setup.
• Wiring Verification: Double-check the wiring connections, especially for CAN-BUS and LIN, to ensure proper communication with your controller. Incorrect wiring can lead to display malfunctions or inaccurate readings.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.