Key-Disp KD68C Operation & User’s Manual

Specifications....................................................................................................................................1 Appearance and Size........................................................................................................................1 Function Summary and Button Definition.........................................................................................2 ◆Function Summary....................................................................................................................2 ◆Button Definition.....................................................................................................................2 Install Instructions............................................................................................................................2 General Operation...........................................................................................................................3 ◆Switching the E-bike System On/Off..........................................................................................3 ◆Display Interface......................................................................................................................3 ◆Speed regulation........................................................................................................................3 ◆Assist Level Selection..................................................................................................................4 ◆Switching the Lighting On/Off....................................................................................................4 ◆Power Indication......................................................................................................................4 ◆Error Code Indication...............................................................................................................4 General Settings...............................................................................................................................5 ◆Trip Distance Clearance...........................................................................................................5 ◆Unit km/mi Conversion............................................................................................................5 ◆Wheel Diameter Settings.........................................................................................................6 ◆Speed-limit Settings.................................................................................................................6 ◆Battery Power Bar Settings......................................................................................................7 Personalized Parameter Settings......................................................................................................7 ◆Power Assist Level Settings......................................................................................................8 Power Assist Level Options......................................................................................................8 PAS Ratio Settings....................................................................................................................8 ◆Controller Over-Current Cut Settings.........................................................................................8 ◆Backlight Settings.....................................................................................................................9 ◆Power-on Password Settings....................................................................................................9 Power-on Password Enable/Disable........................................................................................10 Power-on Password Change....................................................................................................10 ◆Exit Settings..............................................................................................................................11 Factory Reset.................................................................................................................................11 Connection Layout.........................................................................................................................12 Quality Assurance and Warranty Scope...........................................................................................13 Warnings........................................................................................................................................13

E-bike Intelligent LCD Display; Model: KD68C. Specifications ●24V/36V/48V Power Supply ●Rated working current: 10mA ●The maximum working current: 30mA ●Off-state leakage current: <1μA ●Working temperature:-20℃~ 60℃ ●Storage temperature: -30℃~ 70℃ Appearance and Size Product appearance and dimensional figure (unit: mm)

◆Function Summary KD68C has many functions to fit the users’ needs. The indicating contents are shown as follows: ●Battery level indicator ●Motor output indication ●Assistance level indication ●Speed indication ●Trip time ●Trip distance and total distance ●The lighting On/Off ●Error code indication ●Various Parameters Settings (e.g. wheel diameter, speed limit, battery level bar, controller current limit, password enable, etc.) ●Recover Default Settings ◆Button Definition There are three buttons ( , , ) on the KD68C display that represent functions respectively: ON/OFF, UP, DOWN. Installation: KD68C can be mounted on the left side of handlebar close to its grip. Adjust the angle for a good display view. Cut off the power before connecting the corresponding connectors between display and controller.. Assistance-evel

To switch on the E-bike system, hold the ON/OFF button for 2s. In the same way to hold the ON/OFF button for 2s again, the E-bike system will be switched off. When you switch off E-bike system, the leakage current is less than 1μA. ■When E-bike is parked for more than 10 minutes, the E-bike system will be switched off automatically. ◆Display Interface After switching on the E-bike system, the display shows current speed by default. To show more indication items, press ON/OFF button to show the following in turn: Current Speed (Km/h) →Trip Distance (Km) →ODO (Km)→Trip Time (Hour) → Average Speed (Km/h) →Maximum Speed (Km/h) →Current Speed (Km/h).Each state displays for 3s, and then automatically returns to current speed. Display Interface ◆Speed regulation Turn speed handle of KD68C to adjust the speed of electric scooter (bicycle). Speed handle

Press the UP/DOWN to increase or decrease until the desired assistance level is displayed. The default power ranges from level “1” to level “3”. Level “1” is the minimum power. Level “3” is the maximum power. The default value is level “1”. Assist Level “3” ◆Switching the Lighting On/Off To switch on the display backlight and headlight of the E-bike, hold the UP button for 2s. In the same way to hold the UP button for 2s again, the backlight and the headlight will be switched off. Switch On/Off the Lighting ◆Power indication Through the display can know the power of the motor. The display is shown in the figure below, each grid represents the power of 60W. Power of the motor ◆Error Code Indication If there are errors about the electronic control system, the error code will appear automatically. The messages of the error code refer to Attached list 1.

■The error code on the display needs to be removed. Or else you will not be able to ride the scooter(bike) normally. General Settings After the E-bike system is switched on, to access general settings menu, hold both UP and DOWN button for 2 s. Press Up or DOWN button to select the setting items, press ON/OFF to confirm and enter the corresponding settings. General Settings Interface ◆Trip Distance Clearance Clear Trip represents single trip distance clearance. Press UP or DOWN button to choose YES or NO to set trip distance clearance. The default is NO. If you choose YES and press ON/OFF button to confirm the option, the display will show ' OK' and return to the general settings interface. Otherwise the display will return to the general settings interface directly. The default is NO. Trip distance clearance

Set Unit represents unit settings. To convert unit, press UP/DOWN to increase or decrease until the desired setting is displayed. To store a changed setting, press ON/OFF button to confirm and the display will show ' OK' and return to general settings interface. The default unit is Metric. Mile and Kilometer Conversion Settings Interface ◆Wheel Diameter Settings Set WD represents wheel diameter settings. Optional values are 16, 18, 20, 22, 24, 26, 700C and 28. Default diameter is 26 inch. To change basic settings, press UP/DOWN to increase or decrease until the desired value is displayed. To store a changed setting, press ON/OFF button and the display will show ' OK' then return to general settings interface. Wheel Diameter Settings Interface ◆Speed-limit Settings Set LS represents limit speed settings. Limit speed range is 12Km/h to 40Km/h. Limit speed default value is 25Km/h. To change basic settings, press UP/DOWN to increase or decrease until the desired value is displayed. To store a changed setting, press ON/OFF button to confirm the setting. The display will show ' OK' and return to general settings interface. Limit Speed Settings Interface

VOL represents battery voltage settings. Each bar represents a voltage value. 5 bars voltage values must be entered one by one. For example, VOL 1 is the first bar voltage value, the default value is 31.5V. To set battery power bar, press UP/DOWN to increase or decrease the value. To store a changed setting and access the second bar, press ON/OFF button. Set the voltage value for the other bars in the same manner. After voltage values for 5 bars are all entered, long press ON/OFF button to confirm and return to the previous menu. Battery Power Bar Settings Personalized Parameter Settings Hold both UP and DOWN button more than 2 seconds to enter general settings. Hold both UP and DOWN button for another 2 seconds to enter personalized parameter settings interface. Press UP or DOWN button to choose the personalized parameter setting items, then press ON/OFF button to enter the corresponding settings interface. Personalized parameter settings Interface

Power Assistant Level Mode option(*this function is not applicable to a scooter) Power Set represents power assist level settings. In assistance level settings, there are 8 modes for your options: 0-3, 1-3, 0-5, 1-5, 0-7, 1-7, 0-9, 1-9. The default mode is 1- 3. To select the mode of power assist level, press UP/DOWN to increase or decrease the values until the desired mode is displayed. To store a changed setting and access the PAS ratio settings page, press ON/OFF button. PAS mode option Interface PAS Ratio Settings( *this function is not suitable for scooter) PAS ratio setting matches the different requirements. For example, the range is “45- 55 percent” for level 1, ratio value can be changed and the default ratio is 50 percent. Press UP or DOWN button to increase or decrease the number. Press ON/OFF button to confirm and move to the next PAS level ratio settings. Level 9 is the maximum. After all PAS ratios are input, press ON/OFF button to confirm and return to personalized parameter settings interface. For PAS ratio default values, please refer to Attached list 2. PAS Ratio Interface ◆Controller Over-Current Cut Settings Current Set represents controller over-current cut settings. It can be changed from 7.0A to 25.0A. The default value is 15A.

value of the current. To store a changed setting, hold the ON/OFF button and then return to personalized parameter settings interface. Current Set Interface ◆Backlight settings Backlight Set represents backlight settings. Level “1” is the low brightness. Level “2” is the medium brightness. Level “3” is high brightness. The default value is “2”. To modify the backlight brightness, press the UP/DOWN button to increase or decrease until the desired setting is displayed. To store a changed setting, press the ON/OFF button and return to personalized parameter settings interface. Backlight Settings Interface ◆Power-on Password Settings Password Set represents power-on password settings. The default power-on password is 1212. After accessing the power-on password settings, press UP/DOWN to modify the value and then press ON/OFF to confirm digit one by one until the correct 4-digit password is completed, and then press ON/OFF to access power-on password enable settings interface, otherwise stay still in the password input state.

Power-on Password Enable/Disable Press UP or DOWN button to choose Disable or Enable and press ON/OFF button to confirm. Power-on Password default is Disable. If you choose Enable, press ON/OFF button to enter Power-on Password Change interface, otherwise exit the power-on password settings interface. Power-on Password Disable/Enable Interface Power-on Password Change When the display shows “Password Set, P3”, press UP/DOWN to change the value and then press ON/OFF to confirm digit one by one until the new 4-digit password is completed. To store the new power-on password, hold ON/OFF button for 2 s and exit settings. When you switch on the E-bike system next time, the display will show P1,0000, please input the new password to power on. Power-on Password Change Interface

button more than 2 seconds to save the settings and then exit the current settings. Hold DOWN button more than 2 seconds to cancel current setting operation and exit the settings. ■If there is no operations in one minute, display will exit the settings state automatically. Factory Reset Factory Reset represents recover default settings. Press both UP and ON/OFF button more than 2 seconds to enter recover default settings. Press UP or DOWN button to choose Y or N. Y means that recovers default settings. N means that do not recover default settings. When it is Y, hold ON/OFF button more than 2 seconds to recover default settings. The display shows 'OK', prompts for operation completed and returns to display startup state. The default state is N. Recover Default Settings Interface

Display end connection wire end to display end Wire sequence table wire sequence Color Function 1 Red VCC 2 Blue K 3 Yellow TX 4 Green RX 5 White GND 6 Black GND 7 Gray SP 8 Purple SV ■Some products have wire connection with water-proof connectors, users can not see the color of wires in the harness.

ⅠWarranty 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 the customer. ⅡThe following cases do not belong to our warranty scope: 1) The display is demolished. 2) The damage of the display is caused by wrong installation or operation. 3) The shell of the display is broken after the display is out of the factory. 4) The cable of the display is broken. 5) Beyond warranty period. 6) The fault or damage of the display is caused by the force majeure (e.g., fire, earthquake, etc.) Warnings: 1. Use the display with caution. Don’t attempt to release or link the connector when battery is on power. 2. Try to avoid hitting the display. 3. Don’t modify system parameters to avoid parameter disorder. 4. Make the display repaired when an error code appears. ▉THIS MANUAL INSTRUCTION IS A GENERAL-PURPOSE VERSION.SOME OF THE VERSIONS FOR THE DISPLAY SOFTWARE WILL BE DIFFERENT FROM SPECIFICATION TO SPECIFICATION. PLEASE ALWAYS REFER TO AN ACTUAL VERSION.

Attached list 2：PAS ratio default value table Level PAS level mode 1 2 3 4 5 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% 96% — — 0-9/ 1-9 25% 34% 43% 52% 61% 79% 88% 96% Error Code Definition 21 Current Abnormality 22 Throttle Abnormality 23 Motor Phase Abnormality 24 Motor Hall Signal Abnormality 25 Brake Abnormality 30 Communication Abnormality