KD986 E-bike Display User Manual

Product Name and Model

Name:

Intelligent TFT display for E-bike

Model:

KD986

Specifications

• Power Supply: 24V/36V/48V
• Rated working current: 50mA
• Maximum working current: 200mA
• Off-state leakage current: <1μΑ
• Operating temperature: -20°C to 60°C
• Storage temperature: -30°C to 70°C

Appearance and Size

Display Appearance and Dimensional Drawing (unit: mm)

The display shows current speed (e.g., 12.5 km/h), battery SOC (e.g., 70%), assist level (e.g., 5), trip distance (e.g., 0.0 km), odometer (e.g., 2 km), and mode indicators like 'POWER' and 'Sport'.

Dimensions: Width approximately 77mm, Height approximately 96mm, Depth approximately 45mm. The mounting bracket has a diameter of approximately Ø31.8mm.

Remote Control Appearance and Dimensional Drawing (unit: mm)

The remote control features buttons for power, assistance adjustment ([+] and [-]), and information ([info]).

Dimensions: Approximately 42mm in diameter, with a height of approximately 39.7mm. The clamp diameter is approximately R11.1 and the width is approximately 16.2mm.

Function Summary

The KD986 display offers numerous functions, including:

• Battery SOC (State of Charge) percentage indication
• Motor Power indication
• Assist-level indication
• Speed indication (running speed, Max. speed, and Ave. speed)
• Odometer and trip distance
• Push-assistance function
• Trip time indication
• Backlight On/Off control
• Error code indication
• USB connection indicator
• Various Parameter Settings (e.g., wheel size, speed limit, voltage set, assistance level, controller limited current, password enable/change/disable)

General Operation

Switching the E-bike System On/Off

Press the power button briefly to switch the E-bike system ON. To switch OFF, press and hold the power button for 2 seconds. The system will then cease using battery power. The leakage current when switched off is less than 1μA. The system also switches off automatically after 10 minutes of inactivity.

Display Interface

After powering on, the display shows Speed and Trip Distance by default. Press the [info] button to cycle through the following elements: Trip (Km) → ODO (Km) → Max. Speed (Km/h) → Avg. Speed (Km/h) → Time (Min.).

Display Indication Cycle: The interface cycles through different data screens, showing current speed, trip distance, odometer, maximum speed, average speed, and time.

Switching Push-assistance Mode On/Off

To activate the push-assistance function, hold the [-] button. After 2 seconds, the E-bike's drive is activated at a uniform speed of 6 Km/h. The push-assistance function is automatically switched off when the [-] button is released, and the E-bike system stops power output immediately.

Push-assistance Mode: This function is intended for use only when pushing the E-bike. Caution: Be aware of the risk of injury if the E-bike's wheels do not have ground contact while using this function.

Switching the Lighting On/Off

To switch on the headlight, hold the [headlight] button. The backlight brightness is automatically reduced. Hold the [headlight] button again to switch the lighting off.

Assist Level Selection

Briefly press the [+] or [-] button to switch between assistance levels, thereby changing the motor output power. The default assistance level ranges from 0 to 5. Level 0 provides zero output power, Level 1 is the minimum power, and Level 5 is the maximum power. If you press [+] at Level 5, the display will continue to show '5' and blink to indicate maximum power. If you press [-] at Level 0, the display will continue to show '0' and blink to indicate minimum power. The default assist level is 1.

Display Indicators

Assist Level Interface

The display shows the current assist level, typically indicated by a number (e.g., '1') and the current speed.

Battery SOC Indicator

By default, the battery SOC is displayed as a percentage. The battery bar is green when the battery voltage is high. When the percentage is less than 20%, a red square appears, indicating the battery needs recharging.

Battery SOC Representations: The display shows battery levels such as 100%, 40%, 80%, 20%, 60%, and 0% using graphical bars.

Motor Power Indicator

The motor power can be read via the interface, typically shown as a percentage or bar graph.

USB Connection Indication

When the display is connected to a USB external device, the interface will show a USB connection indicator.

Error Code Indication

The E-bike system components are continuously monitored. When an error is detected, a corresponding error code is indicated in the text area. For example, 'Error Code: 30 Communication fault'.

Note: Have the display repaired when an error code appears, as you may not be able to ride the bike normally. Always refer to an authorized dealer.

Settings

Accessing Settings

Press the [power] button to turn on the display. To access the Setting page, hold both the [+] and [-] buttons for 2 seconds. Settings can be accessed via 'Display Setting' or 'Advanced Settings'. All settings are operated while the E-bike is parked.

Dormancy Settings

Dormancy refers to the display's auto-off time settings. To change the automatic shutdown time, navigate to 'Dormancy' and use the [+] or [-] button to select the desired duration. The default auto-off time is 5 minutes. Press the [info] button to store a changed setting.

Trip Distance Clearance

Trip Reset allows clearing the trip distance. To clear the trip distance, press the [+] or [-] button to select 'Yes' (clears single ride distance) or 'No' (does not clear). Press the [info] button to store the setting.

AL Sensitivity

AL sensitivity adjusts screen brightness automatically based on ambient light conditions. When riding at night or in low light, the display backlight and bike light will turn on automatically. The sensitivity ranges from 1 to 5, or OFF (disables the light sensor function). The default value is 3. Use [+] or [-] to choose the desired sensitivity and confirm with [info].

Unit km/mile Conversion

Toggle Unit settings allow changing between metric (km) and imperial (miles) units. Press [+] or [-] to choose the unit and press [info] to confirm. The default unit is 'Metric (km)'.

LCD Luminance Settings

LCD Luminance adjusts the backlight brightness. A lower percentage value results in lower brightness. Use [+] or [-] to choose the desired percentage and confirm with [info].

Password Settings

Password settings manage the power-on password. The default password is '1212'.

Power-on Password Disable/Enable

To enable or disable the Start Password, select ON or OFF using the [+] or [-] button. ON enables the password, OFF disables it (default is OFF). To enable, select ON, press [info], and input the current or default password ('1212'). Digits are confirmed one by one using the [+] or [-] buttons and the [info] button. To disable, select OFF, press [info], and correctly input the current password. A 'Password Canceled Successfully' message will appear, and the system will revert to the default code '1212'.

Power-on Password Reset

To reset the password, select 'Reset PassWord' and press [info]. The interface guides through three pages: input current password (or '1212'), input new password (4 digits), and confirm new password. The screen will display 'Password Reset Successfully'. The new password will be required upon the next power-on.

Factory Defaults

To reset to factory defaults, select YES or NO using the [+] or [-] buttons. The default is NO. Press [info] to store the setting.

Advanced Settings

Wheel Diameter Settings

Wheel diameter settings can be changed by pressing [+] or [-] until the desired value is displayed. The default value is 28 inches. Press [info] to confirm.

Speed-limit Settings

Speed Limit sets the maximum speed. If the current speed exceeds the limit, the E-bike system will switch off automatically. The speed limit range is 15Km/h to 99.9Km/h. Change the value using [+] or [-] and confirm with [info].

MODE Settings

MODE options are ECO and SPORT. Press [+] or [-] to change the mode. Sport mode offers high speed and active response with faster acceleration. ECO mode provides low speed and lower power assist, saving battery. Normal mode offers medium assistance and acceleration.

Speed Sensor

Speed Sensor settings configure the quantity of magnet poles on the e-bike spoke, ranging from 1 to 15. The default value is 1. Change the value using [+] or [-] and confirm with [info].

Power Assistant Sensor Magnets

Assistant represents the number of magnets in the PAS disk. Change the magnet number using the [+] or [-] button and confirm with [info].

Battery Power Bar Settings

Set Voltage configures battery voltage segmented values, switchable between 36V and 48V. Five bar-voltage values must be entered sequentially. For example, with 48V, the first bar's default value is 41.2V. Use [+] or [-] to adjust voltage values and press [info] to store and move to the next bar setting. Confirm all five values with [info].

Assist Level Mode Options

Power Set defines assist level modes. There are 8 modes available: 0-3, 1-3, 0-5, 1-5, 0-7, 1-7, 0-9, 1-9. Select the desired mode using [+] or [-] and confirm with [info].

Slow Start

Slow Start determines the time duration before the motor assist engages when pedaling. The setting range is 1-4, with 4 being the slowest. The default value is 1. Adjust with [+] or [-] and store with [info].

ACF

ACF is the charging switch setting. 0 is OFF, and 50 is ON. Change the setting using [+] or [-] and save with [info].

CRU (Cruise Function)

CRU enables the cruise mode. Press [+] or [-] to switch ON/OFF and press [info] to store. When the display maintains a stable speed, cruise mode can be activated, allowing the bike to run at a fixed speed.

Note: If no setting operations are performed for one minute, the display will automatically exit the settings state.

Quality Assurance and Warranty Scope

Warranty

The warranty is valid for products used under normal usage conditions and is effective for 24 months after shipment or delivery.

Cases not covered by warranty:

• The display is demolished.
• Damage caused by wrong installation or operation.
• Broken shell when the display is out of the factory.
• Broken wire of the display.
• Damage caused by force majeure (e.g., fire, earthquake, etc.).
• Exceeding the warranty period.

Connection Layout

The display uses a socket type male connector. The connector has pins labeled 1 through 5, with distinct 'Bump' and 'Groove' sides for proper alignment.

Wire Sequence Table

Some displays feature water-proof connectors, obscuring the wire colors within the harness.

Warnings

• Use the display with caution. Do not attempt to release or link the connector when the battery is on.
• Try to avoid hitting the display.
• Do not modify system parameters to prevent parameter disorder.
• Have the display repaired when an error code appears.

Note: This manual is a universal version for DISPLAY KD986. Some display versions may differ in specification or software. Always refer to the actual version.

Attached List 1: Error Code Definition

For support, contact: Email: service@engwe-bikes.com