Yolin YL80C E-bike Display User Manual

1. Product Name and Model

Intelligent LCD display for e-bike; model: YL80C.

2. Specifications

• 36V/48V power supply
• Rated working current: 15mA
• Maximum working current: 30mA
• Leakage current at power-off: <1uA
• Working current at the supply controller end: 50mA
• Working temperature: -20~60℃
• Storage temperature: -30~70℃

3. Appearance and Dimensions

The YL80C display features an intelligent LCD screen. The unit includes buttons for operation.

Figure 3-1: Picture of Display 80C

Figure 3-2: Picture of Display 80C Buttons

Figure 3-3: Front View of Display 80C Dimensions (95mm height, 58.5mm width)

Figure 3-4: Side View of Display 80C Dimensions (14mm thickness, 31.5mm depth)

4. Function Overview and Functional Area Layout

4.1 Function Overview

The YL80C display offers various functions for your riding needs:

• Battery level indicator
• Motor power indicator
• Assist level adjustment and indication
• Speed indicator (real-time, maximum, and average speed)
• Distance indicator (trip distance and ODO)
• Push assistance control and indication
• Headlight control and indication
• Error code indicator
• USB connection indicator (reserved)
• Heart rate indicator (reserved)
• Bluetooth connection indicator (reserved)
• Custom parameter setting (wheel diameter, speed limit, battery level, assist level, power-on password, controller current limit, etc.)
• Reset function

4.2 Functional Area Layout

The display interface includes indicators for:

• Battery level
• Fault
• Speed
• Assist level
• Push assistance
• Numeric display
• Headlight
• Bluetooth connection
• USB connection
• Speed unit (km/h or mile/h)
• Trip distance
• ODO
• Maximum speed
• Average speed
• Unit indicator

Figure 4-1: Functional Area Layout Interface of Display YL80C

5. General Operation

4.3 Button Definitions

The display has five buttons: on/off button, plus button, minus button, headlight button, and switching button.

5.1 Power On/Off

Press and hold the power button to turn on the display and the controller's power supply. Press the power button again to turn off the e-bike. The display automatically powers off after 10 minutes of inactivity.

5.2 Display Interface

The display shows real-time speed and trip distance by default. Pressing the switching button cycles through trip distance, ODO, maximum speed, average speed, and riding power.

Figure 5-1: Display Interface Switching

5.3 Push Assistance

Press and hold the push assistance button to enable a 6km/h constant speed push assistance mode. Releasing the button stops power output. This function is for pushing the e-bike, not for riding.

Figure 5-2: Push Assistance Indicator Interface

5.4 Headlight On/Off

Press the headlight button to turn on headlights and dim the display backlight. Press it again to turn off headlights and restore backlight luminance.

Figure 5-3: Backlight-on Indication Interface

5.5 Assist Level Selection

Press the plus button to switch the e-bike's assist level, changing motor output power.

Figure 5-4: Assist Level Switching Interface

5.6 Battery Level Indicator

The battery indicator has five segments. All segments are lit when fully charged. The indicator flashes during undervoltage, signaling the need for charging.

Figure 5-5: Battery Level Indicator Interface (showing full, 4-segment, 3-segment, 2-segment, 1-segment, and undervoltage flashing)

5.7 Motor Power Indicator

The display indicates the motor's output power.

Figure 5-6: Motor Power Indicator Interface

5.8 Error Code Indicator

When a fault occurs, the display shows an error code. Refer to Schedule 1 for detailed definitions.

Figure 5-7: Error Code Indicator Interface

If an error code appears, troubleshoot promptly to ensure normal operation.

6. General Setting

All parameters can only be set when the e-bike is stopped (speed is 0).

Steps for General Setting:

1. Press and hold the plus and minus buttons simultaneously for over 2 seconds to enter the general setting options interface.
2. Press the plus button to switch between general setting options and press the switching button to enter the parameter modification interface.
3. Press the plus or minus button for parameter selection.
4. Press the switching button to save the parameter and return to the general setting options interface.
5. Press and hold the switching button to save the parameter and exit the general setting options interface.

6.1 Trip Distance Reset

'tC' is the trip distance reset item. 'tC-n' means not to reset, and 'tC-y' means to reset.

Press the switching button to enter the parameter modification interface. Press the plus or minus button for parameter selection. Press the switching button to save and return to the general setting options interface.

Figure 6-1: Trip Distance Reset Interface

6.2 Backlight Luminance Setting

'bL' is the backlight luminance setting. Parameters bL-1, bL-2, and bL-3 represent minimum, standard, and maximum luminance, respectively.

Press the switching button to enter the parameter modification interface. Press the plus or minus button for parameter selection. Press the switching button to save and return to the general setting options interface.

Figure 6-2: Backlight Luminance Setting Interface

6.3 Metric/Imperial System Setting

'Un' is the metric/imperial system setting. U-1 represents the imperial system, and U-2 represents the metric system.

Press the switching button to enter the parameter modification interface. Press the plus or minus button for parameter selection. Press the switching button to save and return to the general setting options interface.

Figure 6-3: Imperial System Setting Interface

Figure 6-4: Metric System Setting Interface

7. General Parameter Setting

Steps for General Parameter Setting:

1. Press and hold the plus and switching buttons simultaneously for over 2 seconds to enter the general setting options interface.
2. Press and hold the minus and switching buttons simultaneously for over 2 seconds to enter the general parameter setting options interface.
3. Press the plus button to switch functions, and press the switching button to enter the parameter modification interface.
4. Press the plus or minus button for parameter selection.
5. Press the switching button to save the parameter and enter the next general parameter setting option.
6. Press and hold the switching button to save the parameter and exit the general parameter setting options.

7.1 Wheel Diameter Setting

'Ld' is the wheel diameter setting option. Available parameters: 8-26, 700C, 28-30 inches.

Press the switching button to enter the parameter modification interface. Press the plus or minus button to select the wheel diameter. Press the switching button to save and enter the next general parameter setting option.

Figure 7-1: Wheel Diameter Setting Interface

7.2 Speed Limit Setting

'LS' is the speed limit setting option. The selectable range for maximum speed is 12km/h-40km/h.

Press the switching button to enter the parameter modification interface. Press the plus or minus button to select the maximum riding speed. Press the switching button to save and enter the next general parameter setting option.

Figure 7-2: Speed Limit Setting Interface

8. Custom Setting

Custom setting options are available to meet individual requirements, including: battery level setting, assistance parameter setting, current limit setting, assistance sensor setting, speed sensor setting, handlebar function setting, system setting, and power-on password setting. Not all protocols support all custom setting options.

Figure 8-1: Selection Interface of Custom Setting Options

Steps for Custom Setting:

1. Press and hold the plus and minus buttons simultaneously for over 2 seconds to enter the general setting options interface.
2. Press and hold the plus and switching buttons simultaneously for over 2 seconds to enter the custom setting options interface.
3. Press the plus button to switch functions, and press the switching button to enter the parameter modification interface.
4. Press the plus or minus button for parameter selection.
5. Press the switching button to save the parameter and enter the next setting interface; or press and hold the switching button to save and return to the custom setting options interface; or press and hold the minus button for over 2 seconds to cancel without saving and return to the custom setting options interface.
6. Press and hold the switching button to save the parameter and exit the custom setting options interface.

The display will automatically exit the setting interface if no operations are performed within one minute.

8.1 Battery Level Setting

'VOL' is the battery level setting option. Input voltage values for sections 1-5 one by one.

Press the switching button to enter the parameter modification interface. Take 36V as an example. '1' on the display means the first voltage value, and '31.5' means the first battery level value. Press the plus or minus button to change the value, and press the switching button to confirm. After all 5 values are set, press the switching button to confirm and return to the custom setting options interface.

Figure 8-2: Battery Level Setting Interface

8.2 Assistance Parameter Setting (Option)

'SCR' is the assistance parameter setting option.

8.2.1 Assist Level Selection

Available assist levels: 0-3, 1-3, 0-5, 1-5, 0-7, 1-7, 0-9, and 1-9.

Press the plus or minus button to switch levels. Press the switching button to confirm the level mode and enter the 8.2.2 assistance ratio setting option, or press and hold the switching button to confirm and return to the custom setting options interface.

Figure 8-3: Assist Level Selection Interface

8.2.2 Assistance Ratio Setting Option

Setting the assistance ratio adjusts the speed of each level for different cyclists. Refer to Schedule 2 for details.

Press the plus or minus button to modify the parameter. Press the switching button to confirm and enter the next level's setting interface. After all levels are set, press the switching button again to return to the custom setting options interface.

Figure 8-4: Assistance Ratio Setting Interface

8.3 Current Limit Setting

'CUr' is the current limit setting option. The current limit can be set from 7.0A to 25.0A.

Press the switching button to enter the parameter modification interface. Press the minus button for parameter selection. Modify the maximum controller current and press the switching button to save and return to the custom setting options interface.

Figure 8-5: Current Limit Setting Interface

8.4 Assistance Sensor Setting (Option)

'PAS' is the assistance sensor setting option.

8.4.1 Assistance Sensor Direction Setting

'run' is the assistance sensor direction setting. 'run-F' represents the forward direction, and 'run-b' represents the backward direction.

Press the plus or minus button to select the direction. Press the switching button to confirm and enter the 8.4.2 assistance sensor sensitivity setting option, or press and hold the switching button to confirm and return to the custom setting options interface.

Figure 8-6: Assistance Sensor Direction Setting Interface

8.4.2 Assistance Sensor Sensitivity Setting

'SCN' is the assistance sensor sensitivity setting. The range is 2-9, where 2 is maximum sensitivity and 9 is minimum sensitivity.

Press the plus or minus button to select sensitivity. Press the switching button to confirm and enter the 8.4.3 steel magnet number setting option, or press and hold the switching button to confirm and return to the custom setting options interface.

Figure 8-7: Assistance Sensor Sensitivity Setting Interface

8.4.3 Steel Magnet Number Setting for Assistance Magnetic Disk

'n-' refers to the steel magnet number setting. The setting range is 5-9, 12, 24.

Press the plus or minus button to select the number of steel magnets. Press the switching button to confirm and return to the custom setting options interface.

Figure 8-8: Steel Magnet Number Setting Interface for Assistance Magnetic Disk

8.5 Speed Sensor Setting

'SPS' is the speed sensor setting option, set according to the number of magnetic heads on the wheels. The range is 1-15.

Press the switching button to enter the parameter modification interface. Press the plus or minus button for parameter selection. Press the switching button to confirm and return to the custom setting options interface.

Figure 8-9: Steel Magnet Selection Interface for Speed Sensor

8.6 Handlebar Function Setting (Option)

'Hnd' is the handlebar function setting option.

8.6.1 Handlebar Push Assistance Enable Setting

'HL' is the handlebar push assistance enable setting. HL-N means enabled, HL-Y means disabled (push assistance is activated by turning the handlebar).

Press the plus or minus button to select a parameter. If HL-Y is selected, press the switching button to confirm and return to the custom setting options interface. If HL-N is selected, press the switching button to confirm and enter the 8.6.2 handlebar assist level enable setting option, or press and hold the switching button to confirm and return to the custom setting options interface.

Figure 8-10: Handlebar Push Assistance Setting Interface

8.6.2 Handlebar Assist Level Enable Setting

'HF-Y' refers to the handlebar assist level enabling option. HF-N means disabled. If HF-Y is selected, the maximum speed is limited by the assist level shown on the display when turning the handlebar. If HF-N is selected, the e-bike reaches the rated maximum speed without assist level restriction.

Press the plus or minus button to select the handlebar assist level status. Press the switching button to confirm and return to the custom setting options interface.

Figure 8-11: Handlebar Assist Level Enable Setting Interface

8.7 System Setting (Option)

'SYS' is the system setting option.

8.7.1 Battery Delay Time Setting

'dLY' is the battery delay time setting option. Parameters: 3s/6s/12s.

Press the switching button to enter the parameter modification interface. Press the plus or minus button for parameter selection. Press the switching button to confirm and enter the 8.7.2 button push assistance enable setting option, or press and hold the switching button to confirm and return to the selection interface of custom setting options.

Figure 8-12: Battery Delay Time Selection Interface

8.7.2 Button Push Assistance Enable Setting

'PUS' is the button push assistance enable setting. Y represents enable, and N represents disable.

Press the plus or minus button for parameter selection, and press the switching button to confirm and return to the selection interface of custom setting options.

Figure 8-13: Button Push Assistance Enable Setting Interface

8.8 Power-on Password Setting (Option)

'PSd' is the power-on password setting option. P2 represents the setting option. The default password is 1212.

Press the switching button to enter the power-on password setting interface. Press the plus or minus button for parameter selection, and press the switching button to move the cursor. After inputting the 4-digit password, press the switching button to confirm. If correct, the display enters the 8.8.1 power-on password enable setting option; otherwise, it remains on the password input interface.

Figure 8-14: Power-on Password Input Setting Interface

8.8.1 Power-on Password Enable Setting

Inputting the password enters the password enable setting. PSd-Y requires a password, and PSd-N does not.

Press the plus or minus button for parameter selection. If PSd-N is selected, press the switching button to confirm and return to the custom setting options interface. If PSd-Y is selected, press the switching button to enter the 8.8.2 power-on password modification setting option, or press and hold the switching button to confirm and return to the custom setting options interface.

Figure 8-15: Password Enable Confirmation Interface

8.8.2 Power-on Password Modification Setting

'P3' refers to the power-on password modification setting option. Press the switching button for cursor movement and the plus or minus button for parameter selection. After modification, press and hold the switching button to save and confirm the parameter, returning to the custom setting options interface. If the display reboots, it will show P1, 0000, and will not work until the correct password is entered.

Figure 8-16: Password Modification Interface

9. Restore Default Settings

'dEF' is the setting option for restoring default parameters. dEF-Y restores defaults, and dEF-N does not.

In the normal display interface, press and hold the plus and switching buttons simultaneously for over 2 seconds to enter the restore default settings interface. Press the plus or minus button to switch the parameter. If 'Y' is chosen, press the switching button to confirm. The display will show 'dEF-0' and automatically restore defaults. After completion, it will exit and return to the normal display interface.

Figure 9-1: Interface of Restore Default Settings

10. Quality Commitments and Warranty Scope

10.1 Warranty Information

• The Company provides limited warranty for product quality faults under normal use during the warranty period.
• The warranty period is 12 months from delivery.

10.2 Non-Warranty Scope

• Enclosure opened
• Connector damaged
• Enclosure scratched or damaged after delivery
• Outgoing line of the display scratched or broken
• Faults or damage caused by force majeure (fire, earthquake, natural disasters like lightning strikes, etc.)
• Warranty period expired

11. Outgoing Line Connection Diagram

11.1 Wiring Sequence of Standard Connector

Table 8-1: Wiring Sequence of Standard Connector

Some products use waterproof connectors; the wire color inside the harness may not be visible.

Figure 8-1: Outgoing Line Connection Diagram (showing connecting terminal to controller, leading-out terminal of display, and connecting terminal)

12. Considerations

• Use safely; do not plug or unplug the display when powered on.
• Avoid bumping the display.
• Do not alter background parameter settings arbitrarily, as it may affect normal riding.
• If the display malfunctions, seek repair as soon as possible.
• Due to product upgrades, the displayed contents or functions may differ from this manual based on the actual model.

Schedule 1: Error Code Definitions

Fault codes for protocols YL-01 and YL-02:

Fault codes for protocols YL-05, KDS and YL-J:

Schedule 2: Assist Level Ratio Default Values