CMACEWHEEL YL91F-V Electric Bike Display User's Manual

1. Product Name and Model Number

Smart LCD display for electric bicycle; Model: YL91F-V.

2. Specification

• Power Supply: 36V/48V/52V
• Display Rated Current: 15mA
• Display Maximum Current: 30mA
• Shutdown Leakage Current: <1uA
• Supplied Current to Controller: 50mA
• Operating Temperature: -20°C to 60°C
• Storage Temperature: -30°C to 70°C

3. Appearance and Size

The YL91F-V is a smart LCD display for electric bicycles. It features a clear screen displaying various riding parameters. The unit includes a control button assembly (K5 and K6 models mentioned) for operation. Detailed dimensions are provided for front and side views.

[Textual description of Figure 3-1: Physical picture of the YL91F-V display showing battery level, speed, PAS level, error code, odometer, trip, max speed, average speed.]

[Textual description of Figure 3-2: Physical picture of the K5 control button.]

[Textual description of Figure 3-3: Physical picture of the K6 control button.]

[Textual description of Figure 3-4: 91F-V Front View Dimension showing dimensions of 86mm width and 65mm height.]

[Textual description of Figure 3-5: 91F-V Side View Dimension showing dimensions of 115.5mm height, 77mm width, 13.5mm thickness, and a clamp diameter of 31.8mm.]

4. Function Overview and Functional Areas

4.1 Functional Overview

The YL91F-V display offers a variety of features to suit riding needs, including:

• Battery level indicator
• Pedal assist (PAS) level indicator
• Speed display (current, maximum, average)
• Mileage display (single and total)
• Walk boost mode
• Light ON/OFF control
• Error code indicator
• Motor power indicator (optional)
• USB connection indicator (optional)
• Cruise control indicator (optional)
• Bluetooth connection indicator (optional)
• Personalized parameter settings (e.g., wheel diameter, speed limit, battery power, PAS parameters, password, controller current limit)
• Factory default parameter recovery function

4.2 Functional Areas

[Textual description of Figure 4-1: YL91F-V functional area distribution interface, illustrating the layout of indicators on the display: Battery level, Speed, Error code, Odometer, Trip odometer, Max speed, Average speed, Walk boost, Light ON/OFF, Cruise control, Speed unit (KM/H, MPH), PAS level, Value and unit.]

4.3 Button Definitions

The YL91F-V display is operated via five buttons: power on/off, plus (+), minus (-), light, and toggle (i).

5. Routine Operation

5.1 Power On/Off

Long press the power button to turn the display on or off. When the display is off, it does not consume battery power, with a leakage current of less than 1uA. The display will automatically shut off if not used for more than 10 minutes.

5.2 Display Interface Switching

When the display is powered on, it defaults to showing Current Speed (km/h) and Odometer (km). Short press the toggle button to cycle through Odometer (km), Trip Odometer (km), Maximum Speed (km/h), and Average Speed (km/h).

[Textual description of Figure 5-1: Display Interface Switching sequence, showing transitions between Odometer, Trip Odometer, Maximum Speed, and Average Speed displays.]

5.3 Walk Boost Mode

Long press the minus button to enter walk boost mode. The electric bicycle will move at a fixed speed of 6 km/h. Release the button to stop power output and return to the previous state.

[Textual description of Figure 5-2: Display screen during Walk Boost mode, showing 06.0 KM/H.]

Note: Walk boost mode is intended for pushing the bicycle, not for riding.

5.4 Turning On/Off Lights

Press the light button to turn on the lights and dim the display backlight. Press the light button again to turn off the lights and restore the backlight brightness.

[Textual description of Figure 5-3: Backlight display interface showing the display with lights on.]

5.5 PAS Level Selection

Press the plus (+) or minus (-) buttons to switch the Pedal Assist System (PAS) level, which adjusts the motor output power.

[Textual description of Figure 5-4: PAS level display interface showing different PAS levels, e.g., 1, 2, 3.]

5.6 Battery Level Display

The battery level is indicated by 5 bars. All bars are lit when fully charged. As the battery depletes, bars will extinguish. When the battery is critically low, the remaining bar will flash as a warning to recharge.

[Textual description of Figure 5-5: Battery Level Display Interface showing different battery states: Full power, Four bars power, Three bars power, Two bars power, One bar power, and Empty power flashing.]

5.7 Error Code Display

If a fault occurs in the electric system, the display will show an error code. Refer to Schedule 1 for detailed error code definitions.

[Textual description of Figure 5-6: Error Code Display showing "ERROR" and a numerical code.]

Note: When an error code appears, troubleshoot the issue promptly. The electric bicycle may not function normally until the problem is resolved.

6. Personalized Parameter Settings

All settings must be performed while the bicycle is stationary. The procedure is as follows:

When the display is ON and the speed shows 0:

1. Press and hold the plus (+) and minus (-) buttons simultaneously for more than 2 seconds to enter the personalized parameter setting interface.
2. Press the toggle (i) button to cycle through the parameter setting interface, and press the power button to enter the parameter changing state.
3. Press the plus (+) or minus (-) buttons to select the parameter. Long press (+) for addition and long press (-) for subtraction.
4. Press the toggle (i) button to save the parameter settings and return to the personalized parameter setting interface.
5. Long press the toggle (i) button to save the parameter settings and exit the personalized parameter setting interface.

The following options are available:

6.1 Metric and Imperial Setting

Parameter P1: Metric and Imperial setting. Set to 00 for metric and 01 for imperial.

[Textual description of Figure 6-1: Metric and Imperial Units Setting Interface showing P1 and options 00 (km/h) and 01 (mile/h).]

6.2 Rated Voltage Setting

Parameter P2: Rated voltage setting. Available options: 24V, 36V, 48V, 52V.

[Textual description of Figure 6-2: Rated voltage setting interface showing P2 and a voltage value, e.g., 36V.]

6.3 PAS Level Setting

Parameter P3: Pedal assist (PAS) level setting. Available settings: 0~3, 1~3, 0~5, 1~5, 1~7, 0~7, 0~9, 1~9.

[Textual description of Figure 6-3: PAS level setting interface showing P3 and a range, e.g., 0-5.]

6.4 Wheel Diameter Setting

Parameter P4: Wheel diameter setting. Adjustable range: 1~50 inches.

[Textual description of Figure 6-4: Wheel diameter setting interface showing P4 and a diameter value, e.g., 26 in.]

6.5 Number of Speed Sensor Magnets Setting

Parameter P5: Speed sensor magnet number setting. Adjustable range: 1~100 pcs.

[Textual description of Figure 6-5: Number of speed sensor magnets setting interface showing P5 and a value, e.g., 01.]

6.6 Speed Limit Setting

Parameter P6: Speed limit setting. Adjustable range: 1~100 km/h. (Maximum adjustable speed limit may vary by protocol).

[Textual description of Figure 6-6: Speed limit setting interface showing P6 and a speed value, e.g., 25 km/h.]

6.7 Start-up Setting

Parameter P7: Start-up setting. Options: 00 (zero start), 01 (non-zero start).

[Textual description of Figure 6-7: Start-up setting interface showing P7 and a value, e.g., 00.]

6.8 Drive Mode Setting

Parameter P8: Drive mode setting. Options: 00 (Manpower only), 01 (Electric only), 02 (Both Pedal assist and electric).

[Textual description of Figure 6-8: Drive mode setting interface showing P8 and a value, e.g., 02.]

6.9 Pedal Assist Sensitivity Setting

Parameter P9: Pedal assist sensitivity setting. Higher numbers require more crank rotations to activate the motor; lower numbers require fewer rotations. Adjustable range: 1~24.

[Textual description of Figure 6-9: Pedal assist sensitivity setting interface showing P9 and a value, e.g., 02.]

6.10 Pedal Assist Strength Setting

Parameter PA: Pedal assist strength setting. This is the relative strength of the PWM signal. Adjustable range: 0~5, where 0 is weakest and 5 is strongest.

[Textual description of Figure 6-10: Pedal assist Start-up intensity setting interface showing PA and a value, e.g., 01.]

6.11 Number of Pedal Assist Sensor Magnets Setting

Parameter Pb: Number of pedal assist sensor magnets setting. Adjustable range: 1~15 pcs.

[Textual description of Figure 6-11: Number of pedal assist sensor magnets setting interface showing Pb and a value, e.g., 12.]

6.12 Controller Current Limit Setting

Parameter PC: Controller current limit setting. Adjustable range: 1~50A.

[Textual description of Figure 6-12: Controller current limit setting interface showing PC and a value, e.g., 15.]

6.13 Battery Under Voltage Value Setting

Parameter Pd: Battery under voltage setting. This value can be adjusted based on the current rated voltage.

[Textual description of Figure 6-13: Battery under voltage value setting interface showing Pd and a voltage value, e.g., 31.5V.]

6.14 Power-On Password Setting

Parameter PE: Power-on password setting. By default, the password is not activated. Users can activate it by setting PSd-y. The factory default password is 1801. Users can set a custom four-digit password. It is crucial to remember the password after changing it, otherwise the display will be unusable.

[Textual description of Figure 6-14: Power-on Password OFF interface showing PE and PSd-n.]

[Textual description of Figure 6-15: Power-on Password Activated interface showing PE and PSd-y.]

In password setting mode, the digits flash. Press +/- to select the digit, and press (i) to save and move to the next digit. Long press (i) to save the settings and exit.

[Textual description of Figure 6-16: Power-on password setting interface showing PE and entered digits, e.g., 1212.]

6.15 Auto Sleep Time Setting

Parameter PF: Auto sleep time setting. To conserve battery and extend range, the display turns off after a period of inactivity. Adjustable range: 1~60 minutes. 00 means no auto shutdown. The factory default is 10 minutes.

[Textual description of Figure 6-17: Auto Power Off Time Setting Interface showing PF and a time value, e.g., 10.]

7. Shortcut Operation

7.1 Restore Factory Settings Operation

The display offers a factory default parameter restore function. 'dEF' indicates restore factory default settings. 'dEF-Y' means to restore, and 'dEF-N' means not to restore.

To restore factory settings: Enter the main setting interface, ensure the speed is 0, then press and hold the plus (+) and minus (-) buttons simultaneously for 2 seconds. Press +/- to toggle to 'dEF-Y'. Press the toggle (i) button to confirm. The display will show 'dEF-0' briefly, then automatically restart with factory default settings. The display will then exit to the setting interface.

[Textual description of Figure 7-1: Restore Factory Default Settings Interface showing options dEF-N, dEF-Y, and dEF-0.]

7.2 Trip Odometer Reset Operation

The display records trip odometer and odometer. The trip odometer does not reset automatically when powered off and must be reset manually. The odometer cannot be reset.

To reset the trip odometer: Enter the main setting interface, ensure the speed is 0, then press and hold the plus (+) and minus (-) buttons simultaneously for 2 seconds. The main interface will flash during the reset process.

[Textual description of Figure 7-2: Trip Odometer Reset Interface showing the trip odometer value changing from 25.3 km to 000 km.]

8. Quality Assurance and Warranty

8.1 Warranty Info

Yolin offers a limited warranty for product defects occurring under normal use during the warranty period.

8.2 Warranty Does Not Cover

• Opening the shell.
• Damaged connectors.
• Scratches on the appearance after the product leaves the factory.
• Scratched or broken wires.
• Failure or damage caused by force majeure (e.g., fire, earthquake) or natural disaster (e.g., lightning strike).
• Issues occurring outside the warranty period.

9. Wire Connection Diagram

9.1 Standard Wire Connection Sequence

[Textual description of Figure 9-1: Wire Connection Diagram showing controller connector and display connectors (female and male terminals) with pin assignments.]

Table 9-1: Standard Connector Wire Sequence Table

Note: Some models use waterproof connectors where internal wire colors may not be visible.

10. Precautions

• Always operate the product according to general guidelines. Do not plug or unplug the display while it is powered on.
• Avoid bumping the display as much as possible.
• Do not change parameter settings arbitrarily, as this may compromise normal riding performance.
• If the display malfunctions, send it to a repair center as soon as possible.
• Minor differences may exist between physical products and this manual due to normal upgrades. Refer to the physical products for the most accurate information.

Schedule 1: Error Code Definition

YL-02, YL91F Error Codes

YL-05, KDS, YL-J Error Codes

Schedule 2: Pedal Assist Level Default Ratio Value