Engwe YL80C Smart LCD Display User Manual

Product Name and Model

Product Name and Model: Electric Bicycle Smart LCD Meter; Model: YL80C.

Specifications

Specifications Parameter

• 24/36V/48V Power Supply
• Rated current of the instrument: 10 mA
• Maximum operating current of the instrument: 30mA
• Leakage current shutdown: <1μΑ
• Supply current at regulator: 50mA
• Operating temperature: -20 ~ 60 °C
• Storage temperature: -30 ~ 70 °C

Appearance and Dimensions

Instrument Appearance and Dimension Schematics (Unit: mm)

The display unit has a height of 95mm and a width of 58.5mm. The mounting clamp has a diameter of 22.2mm and a thickness of 14mm.

Function Overview and Function Area Distribution

Function Overview

The YL80C offers a variety of functions to meet your riding needs. Its functions include:

• Battery Display
• Motor Power Display
• Gear Setting and Display for Power Assist
• Speed Display (including real-time speed, maximum speed, average speed)
• Mileage Display (including single trip mileage and total mileage)
• Power Assist Function Control and Display
• Backlight Control and Display
• Error Code Display
• USB Connection Instructions (Optional)
• Heart Rate Display (Optional)
• Multiple Parameter Settings (e.g., wheel diameter, speed limit, battery power setting, power assist parameter setting, startup password setting, controller current limit setting, etc.)
• Default Parameter Reset Function

Function Area Distribution

The display interface shows various information including battery level, speed (km/h), gear, trip distance, total distance, maximum speed, average speed, and power consumption (Wh/Ah).

Normal Operation

Button Definition

The control unit of the YL80C meter has five buttons. For simplicity, the '+' and '-' buttons are referred to as 'UP' and 'DOWN' respectively in this description.

Power On/Off

Press and hold the power button ? to turn on the meter and the controller's power supply. A short press of the power button ? while the meter is on will turn off the electric bicycle. When the electric bicycle system is off, it consumes no battery power, with a leakage current of less than 1 μΑ. The meter will automatically turn off if the electric bicycle is not used for more than 10 minutes.

Display Interface

Upon powering on, the meter defaults to displaying real-time speed and single trip distance (km). Pressing the 'i' button ℹ️ cycles through information such as single trip distance (km), total distance (km), maximum speed (km/h), average speed (km/h), and ride time.

Display Interface Switching

The display cycles through different interfaces showing speed, trip, ODO, max speed, and average speed.

Power Assist Function

Activating Power Assist

Press and hold the DOWN button ⬇️ to activate the electric power assist mode. The electric bicycle will travel at a constant speed of 6 km/h. Releasing the 'A' button (likely 'i' or another button) stops the power output and returns the vehicle to its previous state.

Power Assist Interface

The power assist function can only be used when the user is pushing the electric bicycle. It should not be used while riding.

Backlight Control

A short press of the headlight button turns on the headlight and dims the meter's backlight. This is useful in low light conditions or for night riding. Pressing the headlight button again turns off the headlight and brightens the meter's backlight.

Backlight Brightness Setting Interface

Gear Setting for Power Assist

Press the UP ⬆️ / DOWN ⬇️ buttons to change the gear setting for the electric bicycle's power assist, thereby adjusting the motor's output power. The meter offers three gears: 0, 1, and 3. Gear 0 provides no output power, Gear 1 is the lowest power, and Gear 3 is the highest power. The default gear upon startup is Gear 1.

Power Display

The five-segment display indicates battery level. When the battery voltage is high, all five segments are lit. If the battery is under-voltage, the outer frame of the battery icon will blink at 1 Hz, indicating it needs immediate charging.

Motor Power Display

The motor's output power can be determined via the meter. The display mode is shown in the following illustration.

Error Code Display

If the electric bicycle's electronic control system fails, the meter will automatically display an error code. Refer to Schedule 1 for detailed error code definitions. If an error code is displayed, please resolve the error promptly, as the electric bicycle will not function normally after an error occurs.

General Settings

Entering Settings

Press and hold the power button ? to turn on the device. While stationary, press and hold both the UP ⬆️ and DOWN ⬇️ buttons simultaneously for over 2 seconds to enter the settings mode.

Resetting Single Kilometer

The 'TC' option allows for resetting the single trip kilometer count. Use the UP/DOWN ⬆️⬇️ buttons to select Y (Yes) or N (No). Pressing the 'i' button ℹ️ confirms the selection and proceeds to the backlight settings.

Backlight Brightness Setting

The 'bL' setting controls the backlight brightness. Parameters 1, 2, and 3 can be adjusted, where 1 is the darkest, 2 is the standard brightness, and 3 is the brightest. The factory default is 1. Use the UP/DOWN ⬆️⬇️ buttons to change the brightness. Press the 'i' button ℹ️ to confirm the setting and enter the unit conversion settings.

Unit Conversion

'U' stands for Unit. '1' represents the Imperial system, and '2' represents the Metric system. The speed and kilometer units can be converted using the UP/DOWN ⬆️⬇️ buttons. Press the 'i' button ℹ️ briefly to confirm and press and hold the 'i' button ℹ️ to exit the settings. The default unit for the meter is the Metric system.

General Parameter Settings

Accessing General Settings

To enter the general settings, press and hold the UP/DOWN ⬆️⬇️ buttons simultaneously for more than 2 seconds. To access the wheel diameter settings, press and hold the DOWN ⬇️ + 'i' ℹ️ buttons simultaneously for more than 2 seconds.

Wheel Diameter Setting

'LD' represents the wheel diameter. You can set values from 8-26 inches, 700C, or 28-30 inches. Select the appropriate wheel diameter for your bicycle using the UP/DOWN ⬆️⬇️ buttons to ensure accurate speed and mileage display. The factory default wheel diameter is 26 inches. Press the 'i' button ℹ️ to enter the speed limit settings.

Speed Limit Setting

'LS' indicates the speed limit. The default maximum riding speed is 25 km/h, which can be adjusted to set the maximum speed for the electric bicycle. If the e-bike's speed exceeds the set limit, the controller will stop the motor to ensure rider safety. The speed limit can be adjusted from 12 km/h to 40 km/h using the UP/DOWN ⬆️⬇️ buttons. Press the 'i' button ℹ️ to confirm and exit the setting.

Personalization

Accessing Personalization Settings

To customize the display according to user preferences, personalization settings are available. These include battery status, power assist parameters, speed sensor settings, current limit settings, handlebar settings, password settings, and system settings, totaling eight categories. Press and hold the UP/DOWN ⬆️⬇️ buttons for more than 2 seconds to enter general settings, then press and hold the UP/DOWN ⬆️⬇️ buttons again for more than 2 seconds to enter the personalization selection interface. Use the UP/DOWN ⬆️⬇️ buttons to select the desired setting and press the 'i' button ℹ️ to enter it.

Personalization Selection Interface

The interface displays various setting categories represented by codes: VOL (Battery), SCR (Power Assist), CU (Current Limit), PRS (Parameter), SP5 (Speed Sensor), Hnd (Handlebar), PSd (Password), SY5 (System).

Battery Settings

'VOL' refers to voltage. You need to enter 1 to 5 voltage values sequentially. For example, '1' on the screen represents the first voltage, and '34.5' is the first battery value. Use the UP/DOWN ⬆️⬇️ buttons to adjust the value. Press the 'i' button ℹ️ to confirm and proceed to the next battery setting. After completing all 5 battery value settings, press and hold the 'i' button ℹ️ to confirm and return to the display settings selection interface.

Power Assist Parameters (Options)

This section allows selection of power assist gear settings. Eight modes are available: 0-3, 1-3, 0-5, 1-5, 0-7, 1-7, 0-9, 1-9. Use the UP/DOWN ⬆️⬇️ buttons and press the 'i' button ℹ️ to confirm the proportional value for power assist in the corresponding mode. The default mode for the meter is 0-5.

Power Assist Gear Setting Interface

Proportional Value of Power Assist

By adjusting the proportional value of power assist, you can customize the speed for each gear according to the rider's needs. For instance, in the first gear, the range might be 45-55%, with a default of 50%. Use the UP/DOWN ⬆️⬇️ buttons to increase or decrease values. Press the 'i' button ℹ️ briefly to confirm and move to the next setting. Up to 9 settings can be made. After setting, press and hold the 'i' button ℹ️ to confirm and return to the device settings interface.

Current Limit Setting (Option)

'CU' stands for current limit, which can be set within a range of 7.0-25.0A. Use the UP/DOWN ⬆️⬇️ buttons to change the maximum current value for the controller. Press and hold the 'i' button ℹ️ to confirm and return to the display settings. The factory default value is 15.0A.

Power Assist Sensor Setting

Direction Setting

'PAS' refers to the power assist sensor. The screen displays 'Run-F' (forward) or 'Run-B' (backward). Use the UP/DOWN ⬆️⬇️ buttons to cycle through options and press the 'i' button ℹ️ briefly to confirm and enter the sensitivity setting for the power assist sensor. The default setting is positive.

Power Assist Sensor Sensitivity Setting Interface

Sensitivity Setting

'SCN' on the screen indicates the sensitivity of the power assist sensor. The adjustable range is 2-9, where 2 represents the highest sensitivity and 9 represents the lowest. Use the UP/DOWN ⬆️⬇️ buttons to adjust the sensitivity. Press the 'i' button ℹ️ briefly to confirm and access the proportional parameter setting interface for the power assist sensor. The default sensitivity is 2.

Magnet Setting

'n' indicates the number of magnets for the power assist sensor. You can select the corresponding number of magnets using the UP/DOWN ⬆️⬇️ buttons. Press the 'i' button ℹ️ briefly to confirm and access the setting interface for the power assist sensor. The default number of magnets is 12.

Speed Sensor Setting (Options)

'SPS' stands for speed sensor. It can be set based on the number of magnet heads installed on the electric bicycle's wheels. The adjustable range is 1-15. Change this by briefly pressing the UP/DOWN ⬆️⬇️ buttons and long-pressing the 'i' button ℹ️ to confirm and return to the device settings interface. The default value for the meter is 1.

Speed Sensor Magnet Selection Interface

Handlebar Function (Option)

Handlebar Assist Activation

'Hnd' indicates the handlebar setting. 'HL' signifies handlebar assist, 'HL-N' means no handlebar assist, and 'HL-Y' means handlebar assist is active. When the grip is rotated, the meter engages power assist. You can switch between Y/N by pressing the UP/DOWN ⬆️⬇️ buttons and then briefly pressing the 'i' button ℹ️ to confirm. If 'N' is selected, the device setting interface for switch gear will be activated; otherwise, it returns to the instrument setting selection interface. The default value for the meter is N.

System Settings (Options)

Handlebar Gear Setting Activation

'HF-Y' means the handlebar is divided into gears, while 'HF-N' means it is not. If divided, the maximum speed is limited by the gear position displayed on the meter. If not divided, the maximum rated speed can be reached without being restricted by the displayed gear. You can set Y or N by briefly pressing the UP/DOWN ⬆️⬇️ buttons, then briefly pressing the 'i' button ℹ️ to confirm. Long-pressing the 'i' button ℹ️ returns you to the device settings selection interface. The default value for the instrument is N.

Startup Delay Time Setting

'dLY' indicates the delay time. The delay time can be selected via the UP/DOWN ⬆️⬇️ buttons: 3s, 6s, or 12s. Press the 'i' button ℹ️ briefly to confirm and enter the maximum speed setting interface. The factory setting is 3s.

Slow Start Setting

'SSP' stands for slow start. The adjustable range is 1-4, where 4 is the slowest setting. You can select this using the UP/DOWN ⬆️⬇️ buttons. Press and hold the 'i' button ℹ️ to confirm and exit the setting. The factory setting is 1.

Password Setting

Press the 'i' button ℹ️ to access the password setting status. The screen will display 'P2', indicating the startup password. Briefly press the 'i' button ℹ️ to switch, and use the UP/DOWN ⬆️⬇️ buttons to increase or decrease the value. After entering the 4-digit password, briefly press the 'i' button ℹ️ to confirm. If the password is correct, you will enter the activation password setting interface; otherwise, you will remain in the password status. The default startup password is 1212.

Startup Password Setting Interface

Startup Password

After entering the password, the password interface appears. Use the UP/DOWN ⬆️⬇️ buttons to select J (Yes) or N (No). 'Y' means a startup password is required, and 'N' means no startup password is required. Briefly press the 'i' button ℹ️ to confirm. If you select 'Y', briefly press the 'i' button ℹ️ to enter the password change status. Otherwise, the password setting is completed, and you return to the device selection interface. The factory setting is N.

Password Change

Password Confirmation Interface

Password Change

Reset the startup password. Use the UP/DOWN ⬆️⬇️ buttons to increase or decrease the input value. After making changes, press and hold the 'i' button ℹ️ to save and confirm, then exit the settings interface. Upon restarting the meter, 'P1, 0000' will be displayed. The meter will function normally after entering the correct password.

Password Change Interface

Exit Setting

If no operation is performed for one minute, the meter will automatically exit the setting state.

Factory Reset

Restoring Factory Settings

'dEF' stands for restoring default parameters. In the normal display interface, press and hold the UP ⬆️ + 'i' ℹ️ buttons for more than 2 seconds to access the default parameter restoration interface. Use the UP/DOWN ⬆️⬇️ buttons to switch between J (Yes) and N (No). 'Y' indicates that the default parameters need to be restored, and 'N' means no. If 'Y' is selected, press and hold the 'i' button ℹ️ for more than 2 seconds to confirm. The meter will automatically begin restoring the default settings and display 'dEF-00'. After restoration is complete, it will automatically exit and return to the normal display interface.

Factory Reset Interface

Quality Commitment and Warranty Scope

Warranty Information

Under normal usage conditions, the company is responsible for quality issues of the product and will provide a limited warranty during the warranty period.

Warranty Period

The product's warranty period is 24 months from the date of manufacture.

Conditions Not Covered by Warranty

• The shell is opened.
• The connector is damaged.
• The casing is scratched or damaged after the color LCD meter has left the factory.
• The connection wire of the color LCD meter is scratched or broken.
• Failure or damage due to force majeure (e.g., fire, earthquake) or natural disasters (e.g., lightning strikes).
• The product is no longer under warranty.

Connection Plan

Standard Connection Wire Sequence

The display unit connects to the controller via a multi-pin connector. The sequence and function of each wire are as follows:

Note: Some products use waterproof connectors, making it difficult for users to identify the cable colors in the wiring harness.

Precautions

Ensure safety during use. Do not plug or unplug the meter while it is powered on. Avoid impacts to the meter. Do not arbitrarily change the meter's background parameter settings, as this may compromise normal riding. If the meter is not functioning correctly, it should be repaired as soon as possible.

Attached Table 1: Error Code Definition Table

Attached Table 2: Standard Power Assist Gear Setting Ratios

Email: service@engwe-bikes.com