Electric Bicycle Operating Instructions

Introduction

Dear users,

Please read carefully all the information regarding your E-LF product to ensure optimal functioning of your e-bike. The following text containing a comprehensive description will provide you with information on all aspects and details (including installation, setting up and general use of the display) regarding the use of our display. This instruction document will also help you solve potential problems and failures.

What is an electric bicycle?

An electric bicycle is a conventional bicycle with an electric drive added to assist the rider. The motor function is actuated by pedalling, which is scanned by a special sensor installed in the pedal hub. Therefore, you have to keep pedalling on an e-bike; the motor is there only to help you. You can set an electric bicycle in motion also using a control button or an accelerator, but only up to the maximum permitted speed of 6 KMPH (e.g. for walk assistance). The maximum speed of an e-bike with motor assistance is 25 KMPH, with a 10% tolerance. When this speed limit is reached, the motor switches off, and you need to pedal just like with a regular bicycle. When your battery runs out of power or your motor is off, you can ride your electric bicycle as a conventional bike, without any resistance at all.

From the point of view of the Road Traffic Act, an electric bicycle whose features conform to European standard EN 15194-1 is regarded as a regular bicycle. This means you can ride on bike trails, do not need a driver's license, and a helmet is mandatory only for riders up to 18 years of age.

Description

An illustration shows the main components of the electric bicycle, labeled as: Battery switch, Display with controller, Motor, and Battery.

Factors influencing the electric bicycle range

1. Rolling resistance of the tyres: Leader Fox e-bikes are fitted with tyres with low rolling resistance and increased resistance to puncture. It is also important that the tyres are inflated properly. If the tyres of your electric bicycle are underinflated, the range will decrease.
2. Weight of the electric bicycle: The lower the weight of the electric bicycle, the greater the range.
3. Battery status: It depends on whether the battery was fully charged before your trip. It is also expected that the higher the number of discharge cycles the battery has undergone, the smaller its capacity.
4. Profile and surface of the track: The higher the elevation difference and the steeper the hills you negotiate, and the worse the surface, the shorter the range.
5. Riding mode: It depends on which of the three riding modes you have set.
6. Continuity of riding: The more braking and acceleration, the shorter the range.
7. Air resistance: For example, it depends on whether you ride a bicycle with a low frame and sitting upright, or whether you ride a sporty bicycle with the seat set to the same height as the handlebars.
8. Wind strength: The stronger the wind at your back, the longer the range, and vice versa.
9. Weight of the rider and load: The greater the weight, the shorter the range.
10. External temperature: The lower the temperature, the less battery capacity can be used while riding.

Electric set

Modest System

The system uses monitoring of torque, monitoring of speed of the pedal assist system, and monitoring of the real speed of wheels. The system uses a dual protection feedback for measuring the speed signal to ensure safety and reliability of the system. The speed sensor is used for a more comfortable and smoother ride, with less effort on the rider. It is highly efficient with low power consumption, long range, low noise levels, and smooth operation.

Description and scope of operation:

The motor unit works properly under the following operating conditions:

• Temperature range: -20 to +55°C
• Relative humidity: 15 -95% RH
• Maximum torque: ≥ 80 Nm
• Weight: 3.6Kg
• Noise: <55 dB
• Dustproof/waterproof: IP65
• Certified: CE / EN14764/ ROHS
• Front and rear light: DC 400mA/6V

Power Unit Information

Description of the power unit is placed on the cover and shows the following information:

For example: MM G360.250 17 023 F7 Q817 0001

• MM G360 – name of motor unit
• 250 – rated motor power
• 17 – stator turns
• 023 – connection combination sort
• F7 – measurement and control equipment number
• Q817 – production date 17th August 2016
• 0001 – production serial number, ranging 0000 to 9999

Dimensions of the power unit:

Detailed dimensional drawings of the motor unit are provided, showing various measurements and specifications for its construction and mounting.

Safety instruction

Battery:

• Do not throw the battery into fire.
• Do not throw the battery into water.
• Do not use the battery for other appliances; it has been made specifically for this model.
• Do not dismantle or modify the battery.
• Do not connect the positive and negative poles of the battery.

Charger:

• Do not dismantle or modify the charger.
• Do not use the charger for other appliances; it has been made specifically for this model.
• Do not throw the charger into fire or water.
• Do not touch the charger with wet hands.
• Keep the charger from animals or children.
• Do not cover the charger.
• Do not use the charger if it is broken.

Images show the battery pack with a switch and LED indication, and the charging set.

Battery

Disassembling of battery:

While you unlock the battery, the cover will pop off approximately 1cm. Push and hold the securing plate and take off the battery.

The battery switch is located on the top tube.

Battery charging and maintenance

Charging and Maintenance:

• Charge the battery in a dry environment to avoid short-circuit damage.
• Charge the battery to at least 60% of its capacity once every 3 months, even when the bicycle is not used.
• Do not cover the battery or the charger.
• Do not leave the battery constantly connected to the power source.
• Do not use the battery for other appliances; it has been made specifically for this model.
• Do not disassemble or modify the battery pack.
• Do not throw the battery into fire or expose it to extreme temperatures.
• Recharging time from zero to 100% is 1-7 hours.

Drive warranty:

The warranty applies to drive parts not sensitive to improper handling (pack, electronics, charger, etc.); such parts are covered by a 24-month warranty. The warranty does not apply to chemical parts of the battery and to capacity reduction due to normal use (39% after the expiry of two years); these parts are covered by a 12-month warranty.

Charging:

The battery is the most expensive part of an electric bicycle; therefore, pay increased attention during handling, charging, and storage. The battery is sensitive to precise charging. It is necessary to charge Li-Ion rechargeable batteries using only a charger supplied by the manufacturer. Connect the charger to a 220-240 V power outlet. A 5A protected circuit is sufficient. The charger will automatically suspend charging when full capacity of all cells is reached.

It is recommended to discharge the battery fully after each ride to ensure it reaches its full capacity for the next ride. Charging the battery may last 1 to 5 hours depending on the condition of the battery cells. Charge it exclusively in covered dry areas (moisture and dripping water can damage the charger) at a temperature of 5 to 40°C.

The charging process is indicated by a red glowing LED. It will turn green when the battery is charged and the charging process is complete. The battery contains a charge-monitoring indicator (when the charge indicator button is pressed, the light indicator will come on). Always switch off the battery when finished riding the bike.

Normal battery behaviour:

If the motor stops running smoothly and switches to intermittent operation, it could be a sign of low battery capacity. In that case, switch off the electric drive system and continue without motor assistance, as if riding a conventional bicycle.

Battery warming is normal and does not indicate any defect. The battery is protected by a temperature sensor and switches off automatically in case of excessive overheating. Wait until the battery cools down to its normal operating temperature and then ride on.

If you feel your total battery capacity has dropped, it could be caused by charging or operation in suboptimal climatic conditions. Carry out 3 full charging cycles: fully discharge the battery while riding and then charge to its full capacity at room temperature.

If the charge indicator shows that the battery is discharged, there is still a minimum voltage level in it which protects it against damage, but is not enough to power the electric bicycle. Recharge the battery as soon as possible. Never leave the battery fully discharged, as it could result in its damage.

If the battery is turned on for more than 30 minutes and the bike is not used, the battery will be automatically switched off.

Proper care of the battery prolongs its life.

LCD display

Product:

Intelligent LCD display APT TFT750S

Electrical parameters:

• Battery supply: 36V
• Rated operating current: 40mA
• Max operating current: 100 mA
• Off leakage current: < 1 uA
• Max output current to controller: 100mA
• Operating temperature: -20 ~ 70 °C

Dimensions and materials:

High-contrast TFT colorful display. Product shell is ABS, transparent window is made with high strength Acrylic. Can be used down to -20°C. CE / IP65 water proof / ROHS.

LCD Display Interface:

A visual representation of the LCD display shows various indicators and readouts:

• AVG/MAX Speed: Indicator of speed mode.
• 00.0: Speed display.
• Km/h / MPH: Indicator of speed unit.
• Battery capacity indicator.
• Trip / DST / ODO / Time: Mileage mode indicators.
• Light on indicator.
• Assist level indicator: 1 assist – level PAS, 0 (off), 5 (max. assist).
• Error icon.
• Mileage indicator value: Trip / DST / ODO / Time.

Maximal range:

Maximal range is set with a fully charged battery and flat terrain with a little headwind. Average range is calculated with an ideal set of assist and slightly hilly terrain.

Controller

Controller description:

The handlebar controller features buttons for operation:

• +: Up
• -: Down
• [Power Button]: Power ON/OFF
• M: Menu

Images show the different controller parts: a main unit with buttons, and mounting brackets.

Assembly instructions

Display assembly:

Please pay attention to the tightening torque of screws. Damage caused by excessive tightening torque or incorrect assembly / disassembly is not covered by warranty.

When installing the display, insert two rubber retaining rings into the display clamping jaws and place them onto the handlebars. Use an Allen wrench to tighten the screws. Set your chosen display angle and tighten the screws. Tightening torque: 1 Nm.

Controller assembly:

Open the controller clamping jaw and place it on the handlebars in your chosen position. Use an Allen wrench to tighten the locking screw M3x8. Tightening torque: 1 Nm.

Connector description:

The wiring harness connectors are described as follows:

• (1) RED wire: Anode (24V/36V)
• (2) BLUE wire: Power cord to the controller
• (3) BLACK wire: GND
• (4) GREEN wire: RxD (controller - display)
• (5) YELLOW wire: TxD (display - controller)

Control

Turning on the electrical system of the e-bike:

Before switching on the system, please check electrical wiring. Switch on the power of the electrical system on the battery; the backlighting illuminates. Switch on the display by pressing and holding the POWER button for 1.5 seconds. The display will automatically turn off if it is not used for a while. This auto-off time can be set from 0 to 9 minutes (or OFF).

After the ride, turn off the e-bike in the same way.

For better gear changes, it is advisable to stop pedalling for a while.

Assist level operating:

Short press the UP/DOWN button to change the assist level. The top assist level is 5, and 0 is for neutral. After switching the assist from level 0, the bike may not assist immediately. Please, pedal one or two times backwards, and then the pedal sensor will be activated.

Visual examples show the display changing assist levels from 0 to 1 and then to 9.

Walking mode:

Press and hold the DOWN button for 2 seconds to enter walking mode. You exit walking mode when you release the button. Walk assistance speed depends on gear ratio: lower gear ratio means slower speed, higher gear ratio means faster speed.

Visual examples show the display in normal mode and then in walking mode.

Control Features

Headlight/Backlight On/Off:

Press and hold the UP button for 1 second to turn on/off the headlight, and the screen will switch to the corresponding mode. The motor does not work when battery voltage is low. The display can still keep the headlight on for a while when the e-bike is in riding.

Visual examples show the display with and without the headlight activated.

Speed mode and mileage mode switch:

Short press the Menu (M) button to cycle through speed and mileage modes: AVG Speed -> MAX Speed -> Trip -> DST -> ODO -> Time.

Battery indication:

Shows the approximate value of battery capacity at the display. Accurate values are shown on the battery indicator itself.

Data cleanup:

Press and hold the UP and DOWN buttons together for 1 second to reset several temporary data. Temporary data include AVG speed / MAX speed / Trip. ODO is the value of total traveled distance and cannot be erased.

Parameter setting

By double pressing the Menu (M) button (interval less than 0.3 seconds) you can enter the setting menus.

Press UP/DOWN buttons to change the parameter setting, and press the Menu (M) button to switch to the next item. Double press the Menu (M) button to exit the menu. The display will automatically quit the menu if there is no operation for 30 seconds.

Press the Power button to switch between Display setting and Basic setting.

For safety reasons, you cannot enter the settings menu while riding.

Data clean up (Cr):

Press UP/DOWN button to switch between n (no) / y (yes).

System (S7) - Unit selection:

Press UP/DOWN button to switch between Km/h / MPH.

Visual examples show the display switching between Km/h and MPH units.

Brightness (bL1):

Press UP/DOWN button to change the brightness of the backlight. 1 is the darkest setting, and 5 is the brightest.

Visual examples show the display brightness changing from 1 to 5.

Automatically off (Off):

Press UP/DOWN button to change the auto power off time, from 0 to 15. The number represents the time in minutes to shutdown; the default value is 5 minutes.

Visual examples show the auto-off setting changing from 0 to 15.

Wheel diameter (dH):

Press UP/DOWN button to switch between 16/18/20/22/24/26/27/28/700C/29 inch.

Visual examples show the display showing different wheel sizes.

Battery (bU0):

Press UP/DOWN button to switch between 24V/36V/48V/UBE.

Warning: Do not change this value! It is preset from the factory.

Password for advanced setting (PSd):

The system is factory set. For changing these parameters, contact your dealer or producer. Do not change these parameters yourself, as you can damage the e-bike. Damage caused by improper treatment is not within the scope of the warranty.

Maintenance

Regular maintenance:

• Maintain all components of the electric bicycle clean.
• Use only the recommended and tested cleaning materials.
• Regularly lubricate the chain with suitable oils.
• In winter, clean the electric bicycle after each ride and pay increased attention to removing salt from battery contacts and other connectors.
• While handling the electric bicycle, make sure the cables of the electric system are not damaged. Damaged cables pose a risk of electric shock.
• Regularly check all connections for correct tightening and brakes for correct function. Check also individual parts of the electric bicycle for damage. For example: cracks on the frame, fork, handlebars, stem, damage to cables, damage to battery pack, etc.

Battery transport:

Battery transport is subject to the requirements of regulations on dangerous goods. Private users may transport undamaged batteries on roads without having to conform to other conditions. In case of transport by commercial users or by third parties, it is necessary to comply with special packaging and marking requirements (e.g. ADR regulations).

Batteries should only be sent if the battery pack is undamaged. Plug loose contacts and pack the battery to prevent its movement in the packaging. Notify the forwarding service that the transport concerns dangerous goods.

Battery storage:

Store the battery in a dry and well-ventilated place, out of reach of direct sunlight and other heat sources. In case of cold storage, it is necessary to let the battery warm up to normal room temperature (20°C) before putting into operation.

Never leave the battery fully discharged, as it could result in permanent damage. For long-term storage, keep the battery fully charged. However, do not store it while permanently connected to the charger or installed in the electric bicycle.

Li-Ion batteries are fully recyclable. After expiry of the battery life, you can return it at any collection point or to your dealer.

If you use an e-bike in hard conditions (long-term use of maximum assistance), for longer rides at higher temperatures (30°C or above), in direct sunlight, or when the battery is partially discharged, and a combination of these situations occurs, it is possible that the bike will automatically switch off. This is a fuse protecting the control unit against burning. It is recommended to stop the ride and let the bike (control unit) cool down a little bit. This is not a defect.

Possible problems and their solutions

In case of system failure, perform its diagnostics or contact your dealer.

The control LCD display is not on:

• Always make sure the battery is charged.
• Check whether the battery is inserted correctly and whether the battery switch is on.
• Check the connections of the control unit and the display.

The motor does not start when the walk assistance button is pressed:

• Check the connection of the motor cable (at the motor and the control unit).
• Check the connections of the control unit and the display.

The motor does not start when rotating the pedal cranks (pedalling):

• Check the connection of the pedalling sensor to the control unit.
• Check the distance between the pedalling sensor and the magnet disk (max. 4 mm).
• Check whether the disk is firmly attached to the central axle and does not spin freely (in case of use of compact-type pedalling sensor).

Warning

When there is a problem with the electric bicycle, it can show error messages. The LCD display will show an icon and an error code will be displayed on the speed display. Error codes are marked from 01 E to FF E; see their meaning in the table below.

Electric set warranty

Complaint procedure:

Submit any complaints concerning the electric set or the battery to your dealer. When filing a complaint, submit a proof of purchase and a warranty certificate with the registered serial number of the battery and indicate the reason for the complaint and a description of the defect.

Warranty conditions:

24 months for electric bicycle components – applies to manufacturing and material defects beyond normal wear and tear caused by use.

12 months for battery life – the nominal battery capacity does not drop below 70% of the total capacity over 12 months from the sale of the electric bicycle.

Warranty conditions (Usage):

The electric set must be used exclusively for the purposes it is intended for. The electric set must be used, stored, and maintained in accordance with these Operating Instructions.

A warranty claim shall expire:

• If it is found out that the damage to the product is due to the user's fault (accident, inexpert handling beyond the framework of these Operating Instructions, tampering with the structure of the electric bicycle or connection of the electric system, improper storage, etc.).
• Expiry of the warranty period.

The warranty only applies to the first owner.

General Warnings

If you do not understand any of the points in these Operating Instructions, please contact the dealer for explanation. Please read the whole manual!

Do not lend the e-bike to persons not briefed in its use and operation. Complaints resulting from improper handling will not be accepted.

The LF Energy electric bicycle is not intended for use by children under 15 years of age. Likewise, the electric bicycle cannot be used by persons unable to pedal or handle it independently. The manufacturer is not to be held responsible for any potential injuries or damage to the bicycle!

Ideal weather conditions for using an electric bicycle are dry days, when the outdoor temperature is above 10°C. When used at lower temperatures, the battery discharges faster due to physical phenomena. Using the electric bicycle at temperatures below 0°C is not recommended.

Do not expose the bicycle to direct sunlight as it is fitted with a protective temperature sensor for the electric motor.

Never submerge the battery, the charger, and other electric components in water or another liquid.

Never wash the electric bicycle in a pressure washer (WAP) and always remove the battery before washing.

It is forbidden to tamper with the connections of the electric motor, the control unit, and the battery. Violating this section may result in the warranty not being acknowledged or in irreversible damage to the electric bicycle.

DO NOT USE chargers and components other than the ones included with the electric bicycle. We cannot be held responsible for damage caused by use of other non-approved goods.