Key-Disp KD218 Electric Bike Display User Manual

Electric Bike Display
KD218
User Manual

Product name and Model

E-bike Intelligent LCD display
Model: KD218

Specifications

• 36V/48V Power Supply
• Rated working current: 10mA
• The maximum working current: 30mA
• Off-state leakage current: <1μA
• Operating temperature: -20 ℃~ 60 ℃
• Storage temperature: -30 ℃~ 70 ℃

Appearance and Size

Product appearance and dimensional drawing (unit: mm)

Functions and Button Definition

Function Summary

KD218 has many functions to meet riders’ needs. A number of highlights are as follows:

• Bidirectional serial communication protocol.
• Speed indication including RT speed, Max. speed, AVG speed
• KM/MILE unit toggling as per user’s preference.
• Intelligent battery SOC indicator: Stable SOC indication by optimization algorithm solves the problem of SOC indication fluctuating with start-stop of the motor.
• Brightness adjustment of 5 levels: users can set the brightness as per their habits. 10% is the lowest brightness. 100% is the highest.
• Mileage: the max. mileage can be displayed up to 99999 with Trip distance and ODO. The error code is automatically indicated.
• Push-assistance mode
• 8 optional max PAS level: 0~3/1~3/0~5/1~5/0~7/1~7/0~9/1~9
• Intelligent display: incl. Motor output W, speed Km/h, and Trip distance
• Power-on password: users can set power-on passwords as per their preferences.
• Wheel diameter, the speed limit can be set at the display end.
• Recover Default Settings

Function Area Distribution:

Descriptions:

• Advanced Setting-LCD Luminance adjustment
• Lighting indicator- when turn on the E-bike lights
• Mode selection: ODO→ MAX. Speed → AVG.Speed →Ride Time
• Battery SOC display by percentage info-graphic
• Digital readout of current speed. Speed unit can be toggled
• Digital readout of motor power
• Assist level/Push-assistance- an indication of current assist level which can be increased and decreased by short pressing “+” or ”-” buttons. The push-assistance function can be activated by the long-pressing “-” button for more than 2 seconds and the symbol is shown on the screen.

General Operations

Switching the E-bike System On/Off

To switch on the E-bike system and provide the power supply to the controller, hold the On/Off button for 3s.
To switch off the E-bike system, hold the On/Off button for 2s. The E-bike system no longer uses battery power.
When the E-bike system is switched off, the leakage current is less than 1 μA.

• When the E-bike is parked for approx. 10 minutes, the E-bike system switches off automatically.

Display Interface

After switching on the E-bike system, the display shows Current Speed, Trip Distance, ODO, Power output and Battery SOC by default.
Press the “ON/OFF” button to switch between indication functions below:
Max. Speed (Km/h) → Avg. Speed (Km/h) →Trip Time (Min.) →ODO (km) →Max. Speed (Km/h).
*It cycles back to Max. Speed again.

Switching Push-assistance mode ON/OFF

To activate the push-assistance function, press and hold the “-” button. After 2 seconds, Ebike is activated to go at a uniform speed of 6 Km/h while the screen displays
The push-assistance function will be switched off as soon as you release the “-” button.

The push-assistance function may only be used when pushing the E-bike. Be aware of the danger of injury when bike wheels do not have ground contact while using the push assistance function.

Switching the Lighting On/Off

To switch on E-bike lights, press the “+” button for 2s. The display backlight brightness is automatically reduced while the screen displays “ ”.
Likewise, press the “+” button for 2s again, the bike lights can be switched off and the display backlight recovers its brightness.
*If the E-bike front light or rear light is independent of “+” button, the “+” button can only be used to switch on/off the display backlight.

Assist Level Options

Press “+” or “-” button to change the E-bike system assist level and change the motor output power. The default assist level ranges from level “0” to level “5”, The output power is zero on Level “0”. Level “1” is the minimum output power. Level “5” is the maximum output power. When you reach “5”, press the “+” button again, the interface still shows “5”, and blinks at“5” to indicate the power maximum. When you are in level “0”, press the “-” button again, the interface still shows “0” and blinks at “0” to indicate the power minimum. The default value is level “1”.

Battery Power Indicator

The battery percentage info-graphic indicates battery SOC. The battery frame is full of blue color when the battery is in high voltage. When the battery is in low voltage, the battery frame will flash at the frequency of 1HZ to give a notice that the battery needs to be recharged immediately.

Motor Power Indicator

The power of the motor can be read via the interface below:

Error Code Indication

The components of the E-bike system are continuously and automatically monitored. When an error is detected, the respective error code is indicated in the text indication area. Refer to the detailed definition of the error codes in Attached list 1.

Have the display inspected and repaired when an error code appears. Or else, you will not be able to ride the bike normally. Please always refer to an authorized bicycle dealer.

Display Setting

Press the ON/OFF button to switch on the display.
To access DisPlay Setting, hold both the “+” button and the “-” button simultaneously for 2s.

All the Settings are operated in the case of a parked E-bike.

Trip Distance Clearance

Trip Reset represents trip distance clearance setting.
To the clear trip distance, press “+” button or the “-” button to select Yes or No. Yes represents clearing a single ride distance. No represents not clearing a single ride distance.
To store a changed setting, press “ON/OFF” button.

Toggle Unit km/mile

Toggle Unit represents unit settings. The default value is “Metric (km)”.
To toggle the unit, press the “+” button or the “-” button to choose the desired setting item.
To store a changed setting, press the “ON/OFF” button.

Wheel Diameter Settings

The wheel represents wheel diameter settings. The default value is 26 inches.
To change basic settings, press the “+” or the “-” button to increase or decrease until the desired value is displayed.
To store a changed setting, press the “ON/OFF” button.

Speed-limit Settings

Speed Limit represents the limit speed settings. When the current speed is faster than the speed limit, the E-bike system will be switched off automatically. The speed limit range is 12Km/h to 40Km/h. The default value is 25Km/h.
To change basic settings, press the “+” or the “-” button to increase or decrease until the desired value is displayed. Press the “ON/OFF” button to save a changed setting.

Battery Power Bar Settings

Set Voltage represents battery voltage settings. Short press + or – button to switch between different battery voltages: 24V, 36V and 48V and then press ON/OFF button to enter the corresponding voltage bar value settings. For example, VOL 1 is first bar voltage value. The default value is 31.5V.
To set the battery power bar, press the “+” or the “-” button to increase or decrease the number. To store a changed setting and access the second bar, press “ON/OFF” button.
In the same manner, after 5 bars voltage values are entered, hold the “ON/OFF” button for 2s to confirm and save the settings and then return to the previous menu.

PAS Sensitivity Settings

Sensitivity represents PAS sensitivity settings. The sensitivity value ranges from “1” to “5”.
“1” is the strongest, “5” is the weakest. The default value is “1”.
Press the +/- button to choose the sensitivity value to change the PAS sensitivity settings.
To store a changed setting, press the ON/OFF button

Advanced Settings

After DisPlay Setting is done, Press Back to the return Setting page.

Press + or – button to choose Advanced Settings and press “ON/OFF” button to enter the Advanced Settings page.

PAS level Settings

PAS Level Mode Options
Power Set represents power assist level settings. In assist level settings, there are 8 modes for your choice ：0-3, 1-3, 0-5, 1-5, 0-7, 1-7, 0 -9, 1-9. The default value is 0-5. To change the mode of assist level, press “+” or “-” button to choose the desired mode and press the “ON/OFF” button to confirm and access PAS level ratio settings automatically.

PAS Level Ratio Settings
To change the ratio of a certain assist level, press the “+” button or “-” button to choose the desired ratio, and press the “ON/OFF” button to confirm.
For example, the ratio range is “45-55 percent” for level “1”; the percentage can be changed and the default ratio value is 50 percent.
To store a changed ratio setting, press the “ON/OFF” button and move to the next level ratio setting.
After ratios of all assist levels are input, press the “ON/OFF” button to confirm.
Please refer to assist level ratio default values in Attached list 2.

Controller Over-current Cut Settings

Current Limit represents controller over-current cut settings. The current value can be changed from 7A to 22A.
To change basic settings, press the “+” or the “-” button to increase or decrease the value of the current.
To store a changed setting, hold the “ON/OFF” button.

Power Assistant Sensor Settings

Assistant Num represents PAS magnet quantity settings. The setting value is “5” to “24” which refers to the number of magnets on PAS disk. The default value is 12.
To change the magnet quantity of PAS sensor, press the “+” or the “-” button to choose the desired number of PAS magnets.
To store a changed setting, press the “ON/OFF” button.

Speed Sensor

Speed Sensor represents speed sensor settings. The default value is 1.
To change speed sensor settings, press the “+” or the “-” button to select the corresponding quantity of magnet poles (the range is from 1 to 15).
To store a changed setting, press the “ON/OFF” button.

Slow Startup Settings

Slow start represents slow start-up settings. The range is “1-4”, “4” is the slowest. The default value is “1”.
To change slow start-up settings, press the +/- button to choose the desired value.
To store a changed setting, press the ON/OFF button.

Backlight Brightness Settings

LCD Luminance represents backlight brightness. 100% is the highest brightness less the percentage, the lower the backlight brightness.
To change the backlight brightness, press the “+” button or the “-” button to choose the desired percentage.
To store a changed setting, press the “ON/OFF” button.

Power-on password settings:

Press + or – button to choose ‘Password’ and press ON/OFF to confirm. Meanwhile press +/- button to choose ‘Start Password’ and press ON/OFF to confirm. Press + or – to shift from ‘OFF’ to ‘ON’.

Power-on password enable/disable

In the “Start PassWord” interface, choose ‘ON’ and short press(less than 0.5S) ON/OFF to confirm. Meanwhile, the display interface prompts for a password. Press + or – button to shift numbers from 0 to 9 and press ON/OFF to confirm and input the next digit. After the input is done, the interface will prompt for entering the password again. If two inputs are consistent, the system prompts that the password is set successfully. If two inputs are inconsistent, the first input is to be repeated and confirm the new password again. The interface will be redirected to the original settings page 2 seconds after the password is set successfully. Hold ON/OFF button for more than 2 seconds to exit to the main page or by route’ BACK’ →’EXIT’. The operation steps are as follows:
Password enable/disable the interface

Password Reset.

When the password is enabled, ‘Reset password’ will add to the Password interface. Press(less than 0.5s) +/- button to choose ‘Reset Password’ and press(less than 0.5s) ON/OFF to confirm. Meanwhile, the interface prompts for current password input. The display will be powered off automatically when the password is entered incorrectly after 10 inputs. When a correct password is an input, the interface prompts for a new password. Then follow the operations of setting a new password. The interface will be redirected to the original settings page 2 seconds after the password is reset successfully. Hold the ON/OFF button for more than 2 seconds to exit to the main page or by route’ BACK’ →’ EXIT’. The operation steps are as follows:

Password Disable

In “Start PassWord” interface, choose ‘OFF’ and short press (less than 0.5S) ON/OFF to confirm. Meanwhile, display interface prompts for a password. The display will be powered off automatically when the same password is entered incorrectly after 10 inputs. When a correct password is input, the display will give a prompt of ‘password function disabled’. After 2 seconds, the interface will be redirected to original settings page. Hold ON/OFF button for more than 2 seconds to exit to the main page or by route’ BACK’ →’EXIT’. The operation steps are as follows:

If there are no operations in one minute; the display will exit the settings state.

Quality Assurance and Warranty Scope

I Warranty

1. The warranty will be valid only for products used in normal usage conditions.
2. The warranty is valid for 24 months after the shipment or delivery to customers

II the following cases do not belong to our warranty scope.

1. The display is demolished.
2. The damage of the display is caused by the wrong installation or operation.
3. The shell of the display is broken when the display is out of the factory.
4. The wire of the display is broken.
5. The fault or damage of the display is caused by the force majeure (e.g., fire, earthquake, etc.).
6. Beyond Warranty period.

Connection Layout

Connector wire sequence

Some products have wire connections with water-proof connectors; users can’t see the color of lead wires in the harness.

Warnings:

1. Use the display with caution. Don’t attempt to release or link the connector when the battery is on power.
2. Try to avoid hitting the display.
3. Don’t modify system parameters to avoid parameter disorder. Or else, you will not be able to ride the bike normally.
4. Make the display repaired when the error code appears.

This manual instruction is a universal version for DISPLAY KD218. Some versions of this display may be different from specification to specification as to the software. Please always refer to an actual version.
Attached list 1：Error code definition

Attached list 2: Assist level ratio defaults

Assist Level
Mode/Level| 1| 2| 3| 4| 5| 6| 7| 8| 9
---|---|---|---|---|---|---|---|---|---
0-3/1-3| 50%| 74%| 92%| —| —| —| —| —| —
0-5/ 1-5| 50%| 61%| 73%| 85%| 96%| —| —| —| —
0-7/ 1-7| 40%| 50%| 60%| 70%| 80%| 90%| 96%| —| —
0-9/ 1-9| 25%| 34%| 43%| 52%| 61%| 70%| 79%| 88%| 96%

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