Key-Disp KD686 - User Manual

The KD686 is an intelligent color display designed for e-bikes, offering a comprehensive range of functions and user-friendly features. It serves as the central interface for monitoring and controlling various aspects of the e-bike system.

Function Description

The KD686 display provides intelligent indications for a variety of parameters, including:

• Battery Status: Displays battery voltage value or percentage.
• Ride Data: Shows TRIP distance, ODO (odometer), current speed, maximum speed, average speed, and TRIP time.
• Motor Power: Indicates the current motor power output.
• Assist Level: Allows selection and indication of the assist level.
• Push-Assist Mode: Provides control and indication for the push-assist function.
• Backlight and Headlight: Manages backlight ON/OFF and headlight icon indication.
• Error Codes: Displays error codes for system diagnostics.
• Type-C Port: Includes a Type-C port for connectivity.
• Light Sensor: Features a light sensor for automatic backlight and headlight control.

The display also offers extensive parameter settings, including:

• Trip clearance
• Backlight adjustment
• Unit toggle (Metric/Imperial)
• Wheel size
• Speed limit
• Battery level bar
• Assist level
• Controller limited current
• Power-on password settings
• Option to recover default settings
• Bluetooth function (optional)

Important Technical Specifications

• Display Type: 2.0" IPS TFT
• Power Supply: Compatible with 24V/36V/48V/52V/60V/72V systems.
• Rated Working Current: 22mA
• Off-State Leakage Current: <1µA
• Operating Temperature: -10℃ to 60℃
• Storage Temperature: -20℃ to 70℃
• Connector Type: Julet 5 pins male connector (Type: JL-F39-Z508JG)

Usage Features

General Operation:

• Switching ON/OFF: Hold the "on/off" button to power on or off the e-bike system. The system automatically switches off after 5 minutes of inactivity.
• Display Interface Cycle: Press the "on/off" button to cycle through ODO, Max Speed, AVG Speed, and Trip time.
• Push-Assist Mode: Hold the "-" button for 2 seconds to activate push-assist, which propels the e-bike at a uniform speed of 6 Km/h. Releasing the button deactivates the mode.
• Light Sensor and Manual Lighting Control: The display's light sensor automatically turns the backlight and bike headlight ON/OFF based on ambient light. Users can manually override this by holding the "+" button for over 2 seconds to toggle the headlight ON/OFF.
• Assist Level Adjustment: Press the "+" or "-" buttons to change the motor assist level, ranging from 0 (zero power) to 5 (maximum power). The default is level 1.

Settings: To access settings, hold both the "+" and "-" buttons for 2 seconds.

• Trip Reset: Clears trip distance, Max Speed, AVG Speed, and Trip time. Select Yes/No with "+/-" and confirm with "on/off".
• Toggle Unit: Switches between Metric and Imperial units.
• Wheel Diameter: Adjusts the wheel diameter setting.
• Speed Limit: Sets the speed limit between 12-40 km/h.
• Set Voltage: Configures the voltage power bar values (5 bars) for 36V or 48V systems. The default voltage is 36V.
• SOC View: Changes the battery display method between voltage values and percentage.
• AL Sensitivity: Adjusts the light sensor sensitivity (01 to 05).
• Assist Level Settings (Power Set): Selects one of 8 assist level modes (e.g., 0-3, 1-5, 0-9). The default is 0-5.
• Assist Level Ratio Settings: Adjusts the percentage ratio for each assist level.
• Current Limit: Sets the controller current limit.
• Assistant Num: Configures the number of magnets in the PAS sensor (04, 09, 12, 24, 32).
• Speed Sensor: Adjusts speed sensor settings (01 to 12 magnets).
• Slow Start: Configures the slow start-up setting (0-3, where 3 is the slowest).
• LCD Luminance: Adjusts display backlight brightness (100%-10%).
• Password Setting: Enables, disables, and changes a power-on password. The default is disabled.

Password Management:

• Enable Password: In "Start PassWord" interface, select 'ON', confirm with "on/off", then input a 4-digit password using "+/-" and "on/off" for each digit. Re-enter to confirm.
• Change Password: If enabled, select 'Reset password', input the current password, then set a new one.
• Disable Password: In "Start PassWord" interface, select 'OFF', confirm with "on/off", then input the current password.

Maintenance Features

• Error Code Indication: The system continuously monitors components and displays error codes (e.g., 21: Current fault, 22: Throttle fault, 23: Motor phase absence, 24: Motor hall signal fault, 25: Brake fault, 30: Communication fault, 31: Display MOSFET short circuited, 32: on/off button is stuck, 33: - button is stuck, 34: Over voltage) in the text indication area to help diagnose and repair faults.
• Factory Settings Reset: Hold the "+" and "on/off" buttons for 2 seconds to enter the factory settings page. Select YES with "+/-" and hold "on/off" for 2 seconds to reset the display to default settings.

Warnings:

• Use the display with caution.
• Do not connect or disconnect the connector when the battery is powered on.
• Avoid hitting the display.
• Do not modify system parameters to prevent parameter disorder.
• Have the display repaired when error codes appear.

Quality Assurance and Warranty Scope:

• Warranty Period: 24 months after shipment or delivery to customers, valid under normal usage conditions.
• Exclusions: Warranty does not cover demolished displays, damage from wrong installation or operation, broken display shell (if not factory-related), broken wires, damage due to force majeure (e.g., fire, earthquake), or issues beyond the warranty period.