Leader Fox K21 Electric Bicycle Instruction Manual

Leader Fox K21 Electric Bicycle

Product Information

The LEADER FOX Electric Bicycle is an electric bicycle that conforms to the European standard EN 15194-1. It is considered a regular bicycle under the Road Traffic Act, allowing you to ride on bike trails without needing a driver’s license. A helmet is mandatory for riders under 18 years of age.

The electric bicycle features a display with a controller, a motor, and a battery. The system uses torque monitoring, pedal assist system speed monitoring, and real speed wheel monitoring for efficient and smooth operation. It also has dual protection feedback for safety and reliability.

Product Usage Instructions

Headlight/Backlight On/Off:

To turn on/off the headlight, press and hold the UP button for 1 second. The display will switch to the corresponding mode. Note that the motor does not work when the battery voltage is low, but the headlight can still remain on for a while during riding.

Data Cleanup:

To reset temporary data such as AVG speed, MAX speed, Trip, and Time, press and hold the UP and DOWN buttons together for 1 second.

Parameter Setting:

To access the setting menus, double press the POWER button (interval less than 0.3 seconds). Use the UP/DOWN buttons to change the parameter setting and press the POWER button to switch to the next item. Double press the POWER button to exit from the menu. The display will automatically exit the menu if there is no operation for 30 seconds. Note that you cannot enter the settings menu while riding for safety reasons.

System Kilometer / Mile (S7):

Press the UP/DOWN button to switch between Metric and Imperial units.

Brightness (bL1):

Press the UP/DOWN button to change the brightness of the backlight. 1 represents darkness, while 5 represents brightness.

Automatically Off (Off):

Press the UP/DOWN button to change the auto power off time. The numbers 1 to 9 represent the time in minutes before shutdown. The default value is 5 minutes.

Wheel Diameter (Wd):

Press the UP/DOWN button to change the wheel diameter. Available options include 16, 18, 20, 22, 24, 26, 27, 28, 700C, and 29 inch.

Battery (bU0):

Press the UP/DOWN button to change the voltage. Available options include 24V, 36V, 48V, and UBE. Note: Do not change this setting.

Start Password:

To set a password for turning on the display, press the POWER button to enter the password setting. If “Start input ON” is set, you will need to enter the correct password every time you turn on the bike. Make sure to remember your password, as forgetting it will prevent you from switching on the bike.

Under the law, the dealer is obliged to attach the LEADER FOX Electric Bicycle Operating Instructions to every product

Swan

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?

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.

Description

Factors influencing the electric bicycle range

1. Rolling resistance of the tyres. Leader Fox e-bikes are fittet with tyres with low rolling resistance and increased resistance to puncture. It is also important that the tyres are inflated properly. Therefor, if thetyres of your electric bicycle are underinflated, the range will decrease.
2. Weight of the electric bicycle. The lower 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 to be expected that the higher the number of discharge cycles the battery has undergone, the smaller capacity it has.
4. Profile and surface of the track. The higher the elevation difference and the steeper hills you negotiateand the worse 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 we ride a bicycle with low frame and sitting upright or whether we ride sporty bicycle with seat set to the same height as the handlebars.
8. Wind strength. The stronger the wind we have beck, 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
The system uses monitoring of torque, monitoring of speed of the pedal assist system and monitoring of
real speed of wheels.
The system uses a dual protection feedback for measuring the speed signal to ensure safety and
reliabilityof the system.
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 + 55°C
Relative humidity -15 -95% RH
Maximum torque -≥ 80
Weight -3.6Kg
Noise – <55 dB
Dustproof/ waterproof -IP65
Certified -CE / EN14764/ ROHS
Front and rear light -DC 400mA/6V
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 seriál number, ranging 0000 to 9999

Dimensions of the power unit:

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

Battery

Battery charging and maintenance:

• Charge the battery in a dry enviroment to avoid short-circuit damage.
• Charge the battery to at least 60% of the 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 those drive parts that are 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); those 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. Therefore, it is necessary to charge Li-Ion rechargeable batteries using only a charger supplied by us. Connect the charger to 220-240 V power outlet. 5A protected circuit is sufficient. The charger will automatically suspend charging when full capacity of all cells is reached. We recommend discharging the battery in full after each ride to ensure that your battery will be up to its full capacity for your 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, it could results in its damage.
In the case, that the battery will be turned on more than 30 min and bike will not be used, the battery will be automatically switched off.

Proper care of the battery prolongs its life.

LCD display

Product:
Intelligent display TFT LCD 800S
Supplier:
APT
Electrical parameters:

• Battery supply 36V
• Rated operating current 10mA
• Off leakage current < 1 uA
• CAN BUS protocol
• Maxoutput current 300mA
• Operating temperature – 30 ~ 70 °C
• Storage temperature – 40 ~ 70 °C

LCD dimensions and materials:

• Prodcut shell is ABS, transparent window is made withhigh strength Acrylic.
• Can be used up to -20°C.
• CE / IP65 water proof / ROHS

LCD Display description:

• Speed indication: Includes maximum speed, average speed.
• Unit switch between imperial and metric.
• Intelligent battery capacity indication.
• Control and indication for the headlight.
• 5 levels of backlight brightness setting.
• Indication for power assistance level with 6 levels: 0/1/2/3/4/5.
• Indication for trip: To indicate single-trip distance, total distance and remaining distance.
• Multiple data indication: Indication for the remaining distance, Indication for the consumption of energy
• Record and indication for the error information.
• Control and indication for push assistance.

Maximal range:

Maximal range is set with fully charge battery and flat terrain and little bit of headwind. Average range is calculated with ideal set of the assist and slightly hilly terrain.

Controller

Controller description:

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.

Control

Turning on the electrical system of the e-bike Before switch on of the system please check electrical wiring.
Switch on power of the electrical system on battery, colored backlighting illuminates.
Switch on display with press and short hold (1,5 second) ”ON/OFF” button. Display will automatically turns off if it is not used for a while.
After ride turns off e-bike in the same way.
For better gear change is appropriately stop pedaling for a while.

Assist level operating

Short press UP/DOWN button can change the assist level. Top assist level is 5, 0 for neutral.

Battery indication
Shows approximate value of battery capacity at display. Accurate values show indicator on battery indicator

Walking mode
Press and hold DOWN button for 2 second can get into walking mode, out of the mode when release the button.
Walk assistance speed depends on gear ratio. Lower gear ratio / slower speed, higher gear ratio/ faster speed.

Speed and mileage mode switch
Short press POWER button can change the speed and mileage mode Average Speed -> Max Speed -> Actual Speed -> Single Trip -> ODO -> DST -> Time.

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

Data cleanup

Press and hold UP and DOWN button together for 1 second can reset several temporary data, temporary data include AVG speed/MAX speed/Trip/Time.

Parameter setting

• By double press POWER button (interval less than 0,3 second) can get into setting menus.
• Press UP/DOWN buttons to change the parameter setting, press POWER button to switch to next item.
• Double press POWER button will exit from menu.
• Display will automatically quit menu when there is no operation for 30 seconds.
• For safety reasons, you can not enter the settings menu while riding.

System Kilometer / Mile (S7)

Press UP/DOWN button to switch between Metric/Imperial.

Brightness (bL1)

Press UP/DOWN button to change the brightness of the backlight, 1 is darkness, 5 is brightness.

Automatically Off (Off)

Press UP/DOWN button to change the auto power off time, from 1 to 9 the number represent time (minutes) to shutdown, default value is 5 minutes.

Wheel diameter (Wd)

Press UP/DOWN button to change the wheel diameter 16/18/20/22/24/26/27/28/700C/29 inch.

Battery (bU0):

• Press UP/DOWN button to change the voltage 24V/36V/48V/UBE.
• Do not change this setting!

Start password
Press POWER button get into the password setting. If you set Start input ON you will have to set right password every time you turn on the display. Please be careful with your password, if you forget it you will not be able to switch on the bike.

Basic setting:

• System is factory set. For changing these parameters contact your dealer or producer.
• Do not change these parameters by yourself, you can damage the e-bike.
• Damaged 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. It could result in its 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 returnit at any collection point or your dealer.
If you use an e-bike in hard conditions (long-term use of the maximum assistance), for longer ride at higher temperatures (30 ° C or above), in direct sunlight or when the battery is partially discharged and a combination of these situations is it possible that bike will automaticly swith off. This is a fuse protecting the control unit against burning. We recommend stop the ride and let the bike (control unit) cool down 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, 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. LCD display will show the icon and an error code will be displayed on the speed display. Error codes are marked from 01 E~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.Wrranty 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:

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

Warning

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

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

Your Leader Fox Team

• Czech brand of electric bicycles.
• BOHEMIA BIKE
• Address
• 14000 Praha 4 – Pankrác
• Development, design and manufacturing
• Phone: 388 314 885
• Email: info@leaderfox.cz.

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>