Leader Fox Electric Bicycle Operating Instructions

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?

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, i.e. you can ride on bike trails, do not need a driver's license and a helmet is mandatory only up to 18 years of age.

An illustration shows an electric bicycle with labels pointing to the 'Display with multipurpose controller', 'Battery', 'Motor', and 'Pedal sensor'.

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 are underinflated, the range will decrease.
2. Weight of the electric bicycle: The lower the weight, the greater the range.
3. Battery status: Depends on whether the battery was fully charged before your trip. Higher number of discharge cycles means smaller capacity.
4. Profile and surface of the track: Higher elevation differences, steeper hills, and worse surfaces shorten the range.
5. Riding mode: Depends on the selected riding mode (three modes available).
6. Continuity of riding: More braking and acceleration shorten the range.
7. Air resistance: Depends on riding posture (e.g., upright vs. sporty position).
8. Wind strength: Headwinds reduce range, tailwinds increase it.
9. Weight of the rider and load: Greater weight shortens the range.
10. External temperature: Lower temperatures reduce usable battery capacity.

Safety instructions

Battery:

• Do not throw the battery into fire or water.
• Do not use the battery for other appliances; it is 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 is 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.

An image shows a battery pack labeled 'Battery Switch and LED indication'. Another image shows a charging set with a charger and cables.

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.

Battery switch on top tube:

An image shows the battery switch located on the top tube of the bicycle.

Battery charging and maintenance:

• Charge the battery in a dry environment to avoid short-circuit damage.
• Charge the battery to at least 60% of capacity 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 is 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.) and is covered by a 24-month warranty. The warranty does not apply to chemical parts of the battery or capacity reduction due to normal use (39% after two years); these parts are covered by a 12-month warranty.

Charging:

The battery is the most expensive part of an electric bicycle. Pay increased attention during handling, charging, and storage. The battery is sensitive to precise charging. Charge Li-Ion batteries using only the supplied charger. 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 is reached.

Discharge the battery fully after each ride to ensure it reaches full capacity for your next ride. Charging may last 1 to 5 hours depending on battery cell condition. Charge in covered dry areas (moisture and dripping water can damage the charger) at temperatures between 5 to 40°C.

The charging process is indicated by a red glowing LED, turning green when charging is complete. The battery has a charge-monitoring indicator (light comes on when the charge indicator button is pressed).

Normal battery behaviour:

If the motor stops running smoothly or operates intermittently, it may indicate low battery capacity. Switch off the electric drive system and continue without motor assistance, like a conventional bicycle.

Battery warming is normal and does not indicate a defect. The battery is protected by a temperature sensor and switches off automatically in case of excessive overheating. Wait for the battery to cool down before riding.

If total battery capacity seems to have dropped, it could be due to charging or operation in suboptimal climatic conditions. Perform 3 full charging cycles: fully discharge the battery while riding, then charge to full capacity at room temperature.

If the charge indicator shows the battery is discharged, a minimum voltage level remains to protect it against damage but is insufficient to power the bicycle. Recharge the battery as soon as possible. Never leave the battery fully discharged, as this can cause damage.

Switching on the battery by the POWER button also turns on the rear light, which remains on for safety. To switch off the light, switch off the entire bike using the POWER button on the top side of the battery.

If the battery is turned on for more than 30 minutes without the bike being used, it will automatically switch off.

The battery fully shuts down after 48 hours. After this period, reactivate the battery using the switch button or by connecting the charger.

Proper care of the battery prolongs its life. ?

Product Name:

Middle Install APT450U Intelligent LCD Display

Supplier:

Tianjin APT Development Cop., Ltd.

Electrical Parameters:

• Battery supply: 36 V
• Rated operating current: 10 mA
• Maximum operating current: 30 mA
• Off-state leakage current: < 1 uA
• Maximum output current to the controller: 50 mA
• Operating temperature: -20 ~ 70°C
• Storing temperature: -30 ~ 70°C

Certification:

CE/IP65 (waterproof)/ROHS Directive

LCD Display materials, dimensions and description:

The casing is made from ABS (Acrylonitrile Butadiene Styrene) and the see-through part is made from a very firm acrylate with the stiffness of toughened glass.

Diagrams show the dimensions of the LCD display unit: height 46.8mm, width 78mm, depth 12.7mm. A separate diagram shows a handlebar mount with a diameter of 33.5mm.

LCD display description:

An illustration of the LCD display shows various indicators: Speed mode, Speed display, Battery indicator, Mileage mode, Lamp, Power indicator, PAS lever, Undetermined, ERROR code, Brake, BMS indicator, and Mileage information.

• Speed mode: AVG Speed (average speed), MAX Speed (maximum speed), Speed (current speed).
• Speed display: Kilometres/miles. Can be set as per user preferences.
• Battery Indicator: Intelligent battery status indicator.
• Mileage mode: Indication of travelled distance (Trip), total number of kilometres travelled (ODO), travelling time (Time), expected mileage distance (DST).
• Lamp: Indication of switch on/off light and display backlight.
• Power indicator: Instantaneous engine power.
• PAS level: 7 levels of pedal assist system (PAS).
• Undetermined: Not specified.
• Error code: Error code indicator.
• Brake: Not specified.
• BMS indicator: BMS (battery control system). Displays battery charge percentage and mileage information (requires access to BMS information system support).
• Mileage information: Indication of travelling.

Maximum range:

The maximum range is calculated with a fully-charged battery in flat terrain with weak headwind. The average range is calculated with ideal mode switching and slightly hilly terrain.

Controller description:

An illustration of the controller shows three buttons: POWER, UP, and DOWN, alongside the LCD display.

Assembly and disassembly

Display assembly:

Pay attention to the tightening torque of the screws. Before and during disassembly, it is necessary to remove the grip and, if needed, the brake lever, gear lever, and display from the handlebar. Damage caused by excessive tightening or incorrect assembly/disassembly is not covered by the warranty.

Diagram shows display mounting with screw specifications: M4*12, MAX=0.50 N.M.

Output Wiring Connection:

1. Red conductor: Positive pole (24V/36V)
2. Blue conductor: Supply cable to the controller
3. Black conductor: GND (earthing)
4. Green conductor: RxD (from the controller to the display)
5. Yellow conductor: TxD (from the display to the controller)

A simple wiring diagram shows five colored wires (RED, BLUE, BLACK, GREEN, YELLOW) connecting to a component.

Switching on the electric system of the bicycle:

Before switching on, check electric cable connections. Press the battery switch for power supply. Switch on the control panel on the handlebar by pressing the ON/OFF button for 1.5 seconds. The display will switch off automatically if the e-bike is not used for a set time (0-7 minutes). Press and hold the Up button to turn on the display backlight. Always switch the electric bicycle off the same way after riding.

Assistance mode settings:

Press the Up/Down buttons to change the PAS level (0-7, where 0 is no PAS). If switching from 0 to 1, pedal once or twice backward to activate the pedal sensor.

Three LCD display examples show PAS levels changing from 0 to 1 to 9.

Walking assistant:

This feature assists with walking and pushing the electric bicycle. Press and hold the Down button for 2 seconds to switch to walking mode (6 km/h). Release the button to switch off.

Battery status indicator:

Shows approximate remaining battery capacity. The battery is fully charged when all LED lights are on. Precise capacity is shown on the indicator directly on the battery.

Erasing data:

Press and hold the Up and Down buttons simultaneously for 1 second to reset temporary data like AVG Speed, MAX Speed, Trip, and Time.

Control

Changing between Speed mode and Mileage mode:

Press the POWER button to cycle through Speed mode and Mileage mode.

A sequence of LCD display examples shows transitions between AVG Speed, MAX Speed, Speed & Trip, Time, and ODO.

Headlight/Backlight On/Off:

Press and hold the UP button for 1 second to turn the headlight and screen backlight on/off. The motor does not work when battery voltage is low, but the display can keep the headlight on while riding.

Two LCD display examples show the PAS level changing.

Data cleanup:

Press and hold UP and DOWN buttons together for 1 second to reset temporary data including AVG speed, MAX speed, Trip/Time.

Parameter settings:

Press the Power button twice quickly (faster than 0.3 seconds) to enter parameter settings mode; the parameter will flash. Press Up/Down buttons briefly to change the value. Press the Power button briefly to switch to the next parameter. Settings can be left as is. The display will exit parameter setting mode automatically after 10 seconds of inactivity.

A flowchart shows parameter settings: Kilometer/Mile, Speed limit set, Backlight Brightness, Auto off time, Wheel diameter, Password, Voltage set.

• Kilometer/Mile (S7): Press UP/DOWN to change between Km/h / MPH.
• Backlight brightness (bL1): Press UP/DOWN to change brightness from 1-5.
• Automatic shut-off (OFF): Press UP/DOWN to set automatic off time in minutes.
• Wheel diameter (Wd): Set according to manufacturer. Press UP/DOWN to select from 16/18/20/22/24/26/700C/28/29.
• Voltage setting (bU0): Set according to manufacturer. Press UP/DOWN to select 24V/36V/Ube.

The system is factory set. Contact your dealer or producer for parameter changes. Do not change parameters yourself, as it may damage the e-bike. Damage caused by improper treatment is not covered by the warranty.

Possible problems and their solutions

Regular maintenance:

• Maintain all electric bicycle components clean.
• Use only recommended and tested cleaning materials.
• Regularly lubricate the chain with suitable oils.
• In winter, clean the bicycle after each ride and pay attention to removing salt from battery contacts and connectors.
• When handling, ensure electric system cables are not damaged. Damaged cables pose a risk of electric shock.
• Regularly check all connections for correct tightening and brakes for proper function. Check individual parts for damage (e.g., cracks on frame, fork, handlebars, stem, damage to cables, battery pack).
• Always remove the battery before transporting the electric bicycle in or on a car.

Battery transport:

Battery transport is subject to dangerous goods regulations. Private users transporting undamaged batteries on roads do not need to conform to other conditions. Commercial users or third parties must comply with special packaging and marking requirements (e.g., ADR regulations). Batteries should only be sent if the pack is undamaged. Plug loose contacts and pack the battery to prevent movement. Notify the forwarding service that the transport concerns dangerous goods.

Battery storage:

Store the battery in a dry, well-ventilated place, away from direct sunlight and heat sources. In cold storage, let the battery warm up to normal room temperature (20°C) before use.

Never leave the battery fully discharged; this can cause permanent damage. For long-term storage, keep the battery fully charged but do not store it connected to the charger or installed in the bicycle.

Li-Ion batteries are fully recyclable. Return them at any collection point or to your dealer after their lifespan.

Using an e-bike in hard conditions (long-term maximum assistance, high temperatures above 30°C, direct sunlight, or partially discharged battery) may cause the bike to switch off automatically. This is a safety feature protecting the control unit from overheating. Stop riding and let the bike cool down. This is not a defect.

Maintenance

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

The control LCD display is not on:

• Always ensure the battery is charged.
• Check battery insertion and ensure the battery switch is on.
• Check connections of the control unit and the display.

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

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

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

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

Electric set warranty

When a problem occurs, the electric bicycle may display error messages. The LCD display shows an icon and an error code on the speed display. Error codes are marked from 01 E to FF E.

Error codes:

Assembly and disassembly of the wheel with the engine:

For transportation and maintenance (e.g., replacing a tire tube), it may be necessary to disassemble the wheel with the engine.

First, gently pull to disconnect the engine connector (approx. 20 cm from the engine entry). Then loosen the brake (if used) and shift to the smallest gear. Remove rubber covers from wheel nuts. Loosen the engine nut using a size 18 spanner and remove the wheel from the frame. For assembly, reverse these steps.

To connect the connector properly, ensure the arrows on the connector (1) face each other. Switch the drive unit on and test it.

During wheel assembly, position the central axis of the wheel hub facing down. The cable must enter the engine from below to prevent water ingress, which could damage the engine.

Warning

Complaint procedure:

Submit any complaints concerning the electric set or battery to your dealer. When filing a complaint, provide proof of purchase, a warranty certificate with the battery's serial number, 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.
• 12 months for battery life: Nominal battery capacity should not drop below 70% of total capacity over 12 months from sale.

Warranty conditions:

The electric set must be used exclusively for its intended purpose, and must be used, stored, and maintained according to these Operating Instructions.

A warranty claim shall expire:

• If damage is due to user fault (accident, inexpert handling, tampering with the electric system, improper storage, etc.).
• Upon expiry of the warranty period.

The warranty only applies to the first owner.

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

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

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

Ideal weather conditions are dry days with outdoor temperatures above 10°C. At lower temperatures, the battery discharges faster. Using the electric bicycle below 0°C is not recommended.

Do not expose the bicycle to direct sunlight, as it has a protective temperature sensor for the electric motor.

Never submerge the battery, charger, or other electric components in water or 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, control unit, and battery. Violating this may result in the warranty not being acknowledged or irreversible damage to the electric bicycle.

DO NOT USE chargers and components other than those included with the electric bicycle.

Leader Fox cannot be held responsible for damage caused by the use of other non-approved goods.

EU Declaration of Conformity

Bohemia bike a.s. declares that Leader Fox electric bicycles supplied to the Czech and foreign markets comply with Czech technical standards ČSN EN ISO 4210-2 and European directives EN 15194:2017, 2006/42/EC, and 2014/30/EU for electric motor-assisted bicycles (EPAC). The products comply with the Machinery Directive 2006/42/EC (NV 176/2008 Sb.). These machines meet all relevant provisions of the specified EU regulation.

A list of products is included in the appendix of the document.

Issued in České Budějovice on January 1, 2020.

Enjoy many pleasant and safe kilometres on your new electric bicycle.

Your Leader Fox Team

Czech brand of electric bicycles:

BOHEMIA BIKE

Address:

Pujmanové 1753/10a, 14000 Praha 4 - Nusle

Development, design and manufacturing:

Okružní 697, České Budějovice 37001

Phone: 388 314 885

Email: info@leaderfox.cz