User Manual for E-bike Display YL80C

1. Product Name and Model

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

2. Specifications

• 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 unit features a modern design with a clear LCD screen. It is designed to be mounted on the handlebars of an e-bike. The dimensions are detailed in the figures below.

Fig. 3-1 Picture of Display 80C (Front View)

Fig. 3-2 Picture of Display 80C Buttons (Control Pad)

Fig. 3-3 Front View of Display 80C Dimensions

Fig. 3-4 Side View of Display 80C Dimensions

4. Function Overview and Functional Area Layout

4.1 Function Overview

The YL80C display provides a variety of functions to meet riding needs, including:

• Battery level indicator
• Assist level adjustment and indication
• Speed indicator (real-time speed, maximum speed, average speed)
• Distance indicator (trip distance and ODO)
• Push assistance control and indication
• Headlight control and indication
• Error code indicator
• Custom parameter settings (e.g., wheel diameter, speed limit, assist level, power-on password, controller current limit)
• Reset function

4.2 Functional Area Layout

The display interface is divided into several functional areas:

• Battery level indicator
• Fault indicator
• Speed indicator
• Assist level indicator
• Push assistance indicator
• Numeric indicator (displays speed, ODO, etc.)
• Headlight indicator
• Speed unit indicator (Metric: km/h, Imperial: mile/h)
• Trip distance indicator (displays Trip or ODO)
• Maximum speed indicator
• Average speed indicator
• Unit indicator

Fig. 4-1 Functional Area Layout Interface of Display YL80C

4.3 Button Definitions

The display unit has five buttons:

• [Power Button] (On/Off)
• [Plus Button] (+)
• [Minus Button] (-)
• [Headlight Button]
• [Switch Button] (often labeled 'M' or 'Mode')

5. General Operation

5.1 Power On/Off

• Press and hold the [Power Button] to turn on the display and the controller's power supply.
• In the power-on state, press and hold the [Power Button] again to power off the e-bike.
• When powered off, the display uses less than 1uA leakage current.
• The display automatically powers off if the e-bike is not used for more than 10 minutes.

5.2 Display Interface

Upon turning on, the display shows real-time speed (km/h) and trip distance (km) by default. Pressing the [Switch Button] cycles through trip distance (km), ODO (km), maximum speed (km/h), average speed (km/h), and riding power.

Fig. 5-1 Display Interface Switching (showing Trip distance, ODO, Maximum speed, Average speed)

5.3 Push Assistance

Press and hold the [Plus Button] to enable electric push assistance. The e-bike moves at a constant speed, indicated by a walking person icon. Releasing the button stops power output.

Note: Push assistance is only for walking with the e-bike, not for riding.

Fig. 5-2 Push Assistance Indicator Interface

5.4 Headlight On/Off

Press the [Headlight Button] to turn on the headlights and dim the display backlight. Pressing it again turns off the headlights and restores backlight luminance.

Fig. 5-3 Backlight-on Indication Interface

5.5 Assist Level Selection

Press the [Plus Button] or [Minus Button] to switch the e-bike's assist level, changing motor output power.

Fig. 5-4 Assist Level Switching Interface

5.6 Battery Level Indicator

The battery level is shown by five segments. All segments are lit when fully charged. The battery indicator outline flashes during undervoltage, indicating a need for immediate charging.

• Full battery level indication
• 4-segment indication
• 3-segment indication
• 2-segment indication
• 1-segment indication
• Undervoltage flashing

Fig. 5-5 Battery Level Indicator Interface

5.7 Error Code Indicator

If a fault occurs, the display shows an error code. Detailed definitions are in Schedule 1. Prompt troubleshooting is advised.

Fig. 5-6 Error Code Indicator Interface

6. Personalized Parameter Settings

Parameters can only be set when the e-bike is stopped (speed is 0). The general steps are:

1. Press and hold the [Power Button] and [Switch Button] simultaneously for over 2 seconds to enter the parameter setting interface.
2. Press the [Switch Button] to navigate through setting options and the [Power Button] to enter a specific parameter's modification interface.
3. Use the [Plus Button] / [Minus Button] for parameter selection.
4. Press the [Power Button] to save the parameter and return to the option selection interface.
5. Press and hold the [Power Button] to save the parameter and exit the setting interface.

6.1 Backlight Luminance Setting

Option 01P: Backlight luminance. Settable range 0-3 (1=minimum, 2=standard, 3=maximum).

Press [Power Button] to enter modification, [Plus]/[Minus] to select, [Power Button] to save.

Fig. 6-1 Backlight Luminance Setting Interface

6.2 Metric/Imperial System Setting

Option 02P: System units. 01=Imperial (mile/h), 00=Metric (km/h).

Press [Power Button] to enter modification, [Plus]/[Minus] to select, [Power Button] to save.

Fig. 6-2 Imperial System Setting Interface

Fig. 6-3 Metric System Setting Interface

6.3 Rated Voltage Setting

Option 03P: Rated voltage. Available: 24V, 36V, 48V, 60V.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-4 Rated voltage setting interface

6.4 Auto Sleep Time Setting

Option 04P: Auto sleep time. Range 1-60 minutes. 00 means no auto shutdown. Factory default is 10 minutes.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-5 Auto Power Off Time Setting Interface

6.5 PAS Level Setting

Option 05P: Pedal Assist System (PAS) level. Available settings: 0~3, 1~3, 0~5, 1~5.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-6 PAS level setting interface

6.6 Wheel Diameter Setting

Option 06P: Wheel diameter. Adjustable range: 1-32 inches.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-7 Wheel diameter setting interface

6.7 Number of Speed Sensor Magnets Setting

Option 07P: Speed sensor magnet number. Adjustable range: 1-255 pcs.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-8 Number of speed sensor magnets setting interface

6.8 Speed Limit Setting

Option 08P: Speed limit. Adjustable range: 1-100 km/h. (Maximum limit may vary by protocol).

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-9 Speed limit setting interface

6.9 Start-up Setting

Option 09P: Start-up mode. 00=zero start, 01=non-zero start.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-10 Start-up setting interface

6.10 Drive Mode Setting

Option 10P: Drive mode. Available: 00=Pedal assist only, 01=Electric only, 02=Both Pedal assist and electric.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-11 Drive mode setting interface

6.11 Pedal Assist Sensitivity Setting

Option 11P: Pedal assist sensitivity. Higher numbers require more pedal rotations to activate the motor; lower numbers require fewer rotations. Adjustable range: 1-24.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-12 Pedal assist sensitivity setting interface

6.12 Pedal Assist Strength Setting

Option 12P: Pedal assist strength. Relative strength of the PWM signal. Adjustable range: 0-5 (0=weakest, 5=strongest).

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-13 Pedal assist Start-up intensity setting interface

6.13 Number of Pedal Assist Sensor Magnets Setting

Option 13P: Number of pedal assist sensor magnets. Adjustable range: 5-12 pcs.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-14 Number of pedal assist sensor magnets setting interface

6.14 Controller Current Limit Setting

Option 14P: Controller current limit. Adjustable range: 1-50A.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-15 Controller current limit setting interface

6.15 Battery Under Voltage Value Setting

Option 15P: Battery under voltage setting. Adjustable based on rated voltage.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-16 Battery under voltage value setting interface

6.16 ODO Resets Setting

Option 16P: ODO reset. 00=non-reset, 01=reset.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-17 ODO resets setting interface

6.18 6km/h Walk Boost Setting

Option 18P: 6km/h walk boost. 00=turn off, 01=turn on.

Press [Power Button] to enter, [Plus]/[Minus] to select, [Power Button] to save.

Figure 6-19 6km/h walk boost setting interface

6.19 Power-on Password Setting (Option)

Option 19P: Power-on password. Not activated by default. Factory default is 1212. Users can set a four-digit password. Keep the password in mind.

Press [Power Button] to enter, [Plus]/[Minus] to select. PSd-y activates password, PSd-n deactivates. Press [Power Button] to confirm and set password or exit.

Figure 6-20 Power-on Password Activated interface

Figure 6-21 Power-on Password OFF interface

In password setting mode, digits flash. Use [Plus]/[Minus] to select digits, [Power Button] to save and move to the next digit. Long press [Power Button] to save and exit.

Figure 6-22 Power-on password setting interface

7. Shortcut Operation

7.1 Restore Factory Settings Operation

dEF: Restore factory default parameters. dEF-Y=restore, dEF-N=do not restore.

Enter main setting interface, keep speed at 0, press and hold [Power Button] and [Switch Button] for 2s to enter restore interface. Press [Plus]/[Minus] to toggle dEF-Y. Press [Power Button] to confirm. Display shows dEF-0, then restores settings.

Figure 7-1 Restore Factory Default Settings Interface

7.2 Trip Odometer Reset Operation

The display records trip odometer and odometer. Trip odometer does not reset automatically. It must be reset manually.

Enter main setting interface, keep speed at 0, press and hold [Power Button] and [Switch Button] for 2s to reset the trip odometer. The interface flashes during reset.

Figure 7-2 Trip Odometer Reset Interface

8. Quality Commitments and Warranty Scope

8.1 Warranty Information

• The Company provides limited warranty for faults caused by product quality under normal use.
• Warranty period: Within 12 months from delivery.

8.2 Non-Warranty Scope

• Enclosure is opened.
• Connector is 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 has expired.

9. Outgoing Line Connection Diagram

9.1 Wiring Sequence of Standard Connector

The diagram shows the connecting terminal to the controller, the leading-out terminal of the display, and the connecting terminal.

Fig. 8-1 Outgoing Line Connection Diagram

Note: Some products use waterproof connectors, hiding wire colors.

10. Considerations

• Use safely; do not plug or unplug the display when powered on.
• Avoid bumping the display.
• Do not alter parameter settings arbitrarily, as it may affect normal riding.
• If the display fails, seek repair promptly.
• Product contents or functions may differ from the manual due to upgrades.

Schedule 1: Error Code Definitions

Error codes for protocols YL-02:

Schedule 2: Error Code Definition

Customize YL-02 (LKLS) Error codes: