ENGWE L20 Boost E-Bike User Manual

Safety Guidelines for E-Bike Usage

Thank you for choosing an ENGWE series product. To ensure a quick and safe riding experience, please familiarize yourself with this manual. ENGWE reserves the right to interpret and explain this manual.

Key Safety Precautions:

• Read this manual before using the product.
• Comply with local laws and regulations regarding e-bike usage.
• Before riding, thoroughly check all components for good condition. Contact ENGWE if any problems are found.
• Always wear a helmet and other protective gear.
• Minors must use the product legally and with parental approval and supervision.
• Do not ride under the influence of alcohol or drugs.
• Do not operate if illness prevents strenuous activity.
• Avoid riding in extreme weather or when excessively fatigued.
• While suitable for rain or snow, avoid water contact near the motor center to prevent damage to internal circuitry.
• Do not charge or park the bike indoors. Keep charging away from flammable materials and avoid excessively long charging times.
• Do not touch battery discharge components with hands. Avoid metal contact with battery electrodes and the bike circuit to prevent short circuits.
• Use the original charger for battery charging. Do not use the bike's battery for other devices.
• Avoid using non-original parts. Unauthorized disassembly, cracking, or modification is prohibited and is the user's responsibility.
• Regularly maintain brakes, tires, and other moving parts.
• Services outside the warranty scope may incur charges.

Important Warning

This manual contains important safety performance and service information. Please read the following warnings before first use. If lending the e-bike to others, ensure they read this manual to decrease accident risk.

• Wear a suitable and safe helmet. Wear fluorescent and reflective clothing when riding at night.
• Do not exceed speed limits; this is a primary cause of traffic accidents. Abide by traffic rules.
• Do not touch the charging hole on the bike with metal objects to avoid short circuits.
• Factors like zero starting, frequent braking, riding against the wind, carrying heavy loads, or underinflated tires consume more electric energy and reduce mileage. For best endurance: use assist mode, avoid frequent braking or zero starting, do not overload, and ensure tires are properly inflated.
• Avoid prolonged exposure to sun or rain, and storage in places with high temperatures or corrosive gases to prevent damage to parts and paint, and electrical component failure.
• Check your insurance policy, as it may not cover e-bike riding situations. Consult your insurance company or broker.
• Refer to local laws and regulations for e-bike usage (e.g., minimum age requirements).
• Bicycles are vehicles with inherent risks; abide by traffic rules.
• When emergency braking, brake the rear wheel first, then the front wheel, especially at high speeds, to avoid tipping over. Ride carefully.

Product Components

Key components include the Battery, Chain, and Crankset.

Battery: The power source for the e-bike.

Chain: Transmits power from the pedals to the rear wheel.

Crankset: Includes the pedals and chainrings, where the rider applies force.

[Diagram Description: Visual representation of the e-bike's battery, chain, and crankset.]

Boost Button (B Button) Operation

Press the B button while riding with pedal assist to increase power. The power enhancement lasts up to 60 seconds per operation. To increase power again after 60 seconds, release and re-press the button.

Notes:

• Use only when local traffic regulations permit.
• The B button function is inactive when riding with the throttle.

Technical Parameters

The following table details the performance and basic parameters of the ENGWE L20 Boost e-bike.

Product Installation

Follow these steps to assemble your ENGWE L20 Boost e-bike.

4.1 Install the Handlebar

1. Remove the handlebar from its packing material and place it at the riser clamp.

2. Install the 4 bolts using a 4mm hexagon wrench clockwise. Do not fully tighten all bolts initially. Adjust the handlebar to the proper angle as shown in the diagram, then tighten the 4 bolts securely.

[Diagram Description: Figure A shows the 4 bolts for tightening the handlebar. Figure B illustrates adjusting the handlebar to the desired angle before final tightening.]

4.2 Install the Front Wheel

1. Remove the front wheel from its packing material. Install the screw gasket shaft sleeve according to the drawing.

2. Place the front wheel into the front fork slots and secure it using a 15mm wrench.

[Diagram Description: Illustration showing the correct placement of the front wheel in the front fork and the use of a wrench for tightening.]

4.3 Install the Front Mudguard

1. Connect the lifting lug of the mudguard to the hole of the front fork axle pipe and thread in the screw to tighten.

2. Align the mudguard support with the front fork mudguard take-up hole position, then thread in the screw for tightening.

[Diagram Description: Shows the connection points for attaching the front mudguard to the front fork axle and support.]

4.4 Install the Front Basket

1. Remove the basket from its packaging material and install the screw gasket according to the drawing.

2. Install the 4 bolts clockwise using a 4mm hexagon wrench. Place the harness in the front shelf hook.

[Diagram Description: Illustrates the installation of the front basket using bolts and securing the harness.]

4.5 Install the Front Light

1. Install the headlight screw washer nut according to the drawing.

2. Fix the headlight line as shown in the figure.

[Diagram Description: Shows how to mount the front headlight and secure its wiring.]

4.6 Install the Pedals

1. Prepare the left and right pedals. The pedal marked "R" is installed on the side of the chainring, and the pedal marked "L" is installed on the opposite side.

2. Tighten the right pedal ("R") clockwise. Tighten the left pedal ("L") counterclockwise.

[Diagram Description: Shows the "L" and "R" markings on the pedals and indicates the correct installation direction (clockwise for R, counterclockwise for L).]

Display Instructions

The ENGWE L20 Boost features an Intelligent LCD display, model YL61F-D.

5.1 Product Name and Model

Intelligent LCD display for e-bike; model: YL61F-D.

5.2 Specifications

Specifications mentioned: j60 j70.

5.3 Appearance and Dimension

[No visual provided for this section in the source document.]

5.4 Function Overview

The YL61F-D display offers various features:

• Speed (Current, Max, Average)
• Odometer
• Trip Odometer
• Battery Level Indicator
• PAS (Pedal Assist System) Level
• Walk Boost Mode
• Light ON/OFF Control
• Speed Metric (KM/H or MPH)

5.5 Display Interface Layout

The display shows:

• Battery level (indicated by bars)
• Speed
• Error codes (if any)
• PAS level
• Walk boost status
• Light status (ON/OFF)
• Speed Metric: KM/H or MPH
• Odometer
• Trip Odometer
• Max speed
• Average speed

[Diagram Description: Figure 4-1 illustrates the YL61F-D display's functional area distribution interface, showing the placement of battery level, speed, PAS level, and other indicators.]

5.6 Button Definitions

The display unit has three buttons:

• Power on/off button
• Plus button (+)
• Minus button (-)

5.7 Operation Instructions

Power on/off

Long press the power button to turn the display on or off. When off, the display consumes less than 1uA. The display automatically shuts off after 10 minutes of inactivity.

Display interface switching

When powered on, the display defaults to Current Speed and Trip Odometer. Short press the power button to cycle through Trip Odometer, Odometer, Maximum Speed, and Average Speed.

Walk boost mode

Long press and hold the plus button [+] to enter walk boost mode. The e-bike moves at walking speed, indicated on the display. Release the button to stop power output. This mode is for pushing the e-bike, not for riding.

Turning on/off lights

Long press the minus button [-] to turn on the lights and dim the display backlight. Long press the minus button [-] again to turn off the lights and restore backlight brightness.

Assist level selection

Press the plus [+] or minus [-] buttons to switch the PAS level, adjusting motor output power.

Battery level display

The battery level is shown with 5 bars. All bars are lit when fully charged. The bar begins to flash when the battery is nearly depleted, indicating a need to charge.

[Battery Level Description: Full power (5 bars), 4 bars power, 3 bars power, 2 bars power, 1 bar power, Empty power (flashing bar).]

5.8 Error Code Indicator

If the e-bike's electronic system detects a fault, an error code will be displayed. Refer to Schedule 1 for definitions.

Schedule 1 Error Code Definitions

Battery

Warning: Beware of chemical burns! If a battery is damaged, stop using it immediately.

If the battery is completely empty, it may become unchargeable. Overheating or undercharging can shorten battery life and reduce product run time.

Important: Battery Disposal

[Disposal instructions are not fully detailed in the provided text, only a heading.]

Charging

Charging time is typically 4-6 hours, depending on battery capacity. Warning: [Specific warnings related to charging are mentioned but not detailed in the provided text.]

Warranty Policy

Thank you for purchasing ENGWE series products!

Warranty Service: Please visit the official website https://engwe-bikes.com/ to view the ENGWE warranty policy. For quality issues, contact ENGWE after-sales service or the seller where you purchased your e-bike. Provide your order number, purchase interface, and videos of the issue.