FAFREES FF20 Polar Smart EV or Moped Electric Fat Tire Bike User Manual

FAFREES FF20 Polar Smart EV or Moped Electric Fat Tire Bike

Before your first operation, please read the user manual carefully!

Note
Before your first ride, it is important for you to know your new e-bike well, so that you can get the best performance, comfort, enjoyment and safety from it during your ride. To understand the new bicycle and the correct operation, you should first read the manual carefully. Second, it is significant to take your first ride under a safe and controlled circumstance, like staying away from cars, obstacles and other cyclists.
Third, bicycles are vehicles with certain risks. Please follow the traffic rules during cycling.
It’s better to learn the local traffic rules about riding an e-bike on public roads before your first ride in case you violate the regulations. For your own safety, never forget to put on a qualified helmet before you get on the e-bike. Fourth, the electric bike is supplied without basic mandatory equipment, which may vary from place to place. Therefore, if you intend to use the e-bike on public roads, it’s necessary to equip the bike with the basic mandatory equipment, in accordance with the relevant laws and regulations. In addition, this product is designed for your personal use. Do not use it for commercial or other purposes. Last, keep this manual safe for reference.

Warning
Before each charge, check the charger, cable and plug. If there is any damage, do not use the charger.
Before riding, check the tire pressure and check whether the wheels and handlebar are installed correctly and tightly.
Before riding, check whether the headlights are securely fastened in the correct position, clean and not covered by anything. Damaged reflectors must be replaced.
Besides, if the seat post in the seat tube is not inserted deep enough to reach the minimum insertion mark, the seat post may break. Check whether it is inserted deeper than the minimum insertion depth. When braking on a wet road, the braking distance is usually longer than on a dry road. Therefore, brake earlier for a safer stop.
When you have to brake urgently, please hit the right hand brake first to stop the rear wheel, and then hit the left hand brake, especially when you brake at a high speed. If the front wheel stops suddenly while the rear wheel is still cycling at a high speed, you may fall over and get hurt. So please ride it carefully.
Furthermore, avoid puddles, wet mud, swamps, water, snow or ice. Try not to use the e-bike on a rainy, stormy or snowy day. If the bicycle’s electric parts (control unit, engine and battery) get damp, wet or soaked, it will cause irreversible damage, or even a battery explosion.
This product can only be used by one adult at a time. Do not carry any extra passengers. This vehicle is not a toy. Same as other vehicles, it is possible to fall, crash or encounter other dangerous situations. Please don’t offer your e-bike to anyone hat doesn’t know how to use it correctly. If you let anyone else ride your bike, it will be your responsibility to ensure that all riders understand all warnings, cautions, instructions and safety precautions, and to ensure that they are able to use this product safely and responsibly and protect themselves and others from injury.

Product function illustration

1. Break lever
2. Shift lever
3. LCD Display
4. Bell
5. Button set
6. Throttle
7. Headlight
8. Fender
9. Brake pad
10. Brake caliper
11. Front fork
12. Pedal
13. Crankset
14. Chain
15. Rear derailleur
16. Tire
17. Motor
18. Rear light
19. Cargo rack
20. Saddle
21. Battery

Function introduction:

1. Charging: The charging port of the battery at the saddle position is on the right side above the battery, and the charging port of the battery on the front is on the left side above the battery. When the battery is fully charged, the charger light changes from red to green.

2. Power On/Off: Long press the power button to turn on/off the display power.

3. Display: After the display is turned on, briefly press the power button (<0.5s) to see the different trip modes. The information displayed will be switched between the daily kilometers (TRIP) – total kilometers (ODO) – Maximum speed (MAX) – Average speed (AVG) – Remaining distance (RANGE) – Energy consumption (CALORIES) – Output power (POWER) – Travel time (TIME)

4. Headlight: By pressing and holding the light button, the controller will turn on/off the headlight.

5. PAS Mode: You must turn on the battery to use the e-bike in pedal-assisted mode. Power assist is triggered when you pedal forward, and stops when you stop pedaling, sometime with a delay. If no power is needed, turn off the power of the battery.

6. Electric Mode: You do not need to pedal the e-bike if you use the hand throttle. The
   throttle can be controlled by twisting it from the resting position, and the farther the throttle switch is from resting position, the more power is sent to the motor to accelerate the e-bike.

7. Cruise Control : Cruise control will be triggered when you holding thumb throttle and riding at the same speed for 8 seconds, and it will be released by braking/pedaling or throttling.

8. Walk Assist Mode: Long press the “-” button, the electric bicycle will enter the walk assist mode. The electrical bike runs at a constant speed of 6 km/h. Release the “-” button, the electric bicycle will immediately stop power output and return to the state before push.

Product installation:

1. After removing the foam, unfold and secure the frame as shown.
   

2. Install the handlebar. Insert the handlebar into the tube and lock.
   

3. Install the saddle. Insert the saddle into the seat tube and lock
   

4. Install the pedals. Note the markings on the pedal screws and on the crank
   arms. Stamp with “L” is the left pedal, stamp with “R” is the right pedal, the
   right pedal is installed on the side of the sprocket. NOTE: The left pedal is
   tightened to the left and the right pedal is tightened to the right.

5. Install the bell. Loosen the bell screw, put the bell in place and tighten the screw

6. Adjust the headlight. Adjust the headlight position and tighten the screw.

Product parameter

Display user instructions

Product Name and Model Number
Smart LCD display for electric bicycle; Model: YL81F.

Specification

• 24V/36V/48V power supply

• Display rated current 15mA
  

• Display maximum current 30mA
  

• Shutdown leakage current <1uA
  

• Supplied current to the controller 50mA
  

• Operating temperature -20～60℃

• Storage temperature -30 to 70°C

Appearance and Size

• Figure 3-1 Physical picture of the YL81F display

• Figure 3-2 Physical picture of the K5 control button

• Figure 3-3 90T-V Front View Dimension

• Figure 3-4 90T-V Side View Dimension

Function overview and Functional areas

• Functional overview
  The YL81F display offers a variety of features to suit your riding needs, including:

• Battery level indicator

• Pedal assist (PAS) level indicator

• Speed (current speed, maximum speed, average speed)

• Mileage display (single and total mileage)

• Walk assist mode

• Light ON/OFF

• Error code indicator

• Motor power indicator (optional)

• USB connection indicator (optional)

• Cruise control indicator (optional)

• Bluetooth connection indicator (optional)

• Personalized parameter settings (e.g. tire diameter, speed limit, battery power setting and PAS parameter setting, password setting, controller current limit setting, etc.).

• Restore factory default parameter function

Functional areas

Figure 4-1 YL90T-V functional area distribution interface

1.  Battery level
2. Error code
3. Current speed
4. Walk assist mode
5. Trip odometer Odometer Max speed Average speed
6. Light ON/OFF Bluetooth USB
7. Speed unit KM/H MPH
8. Cruise
9. PAS level
10. Value and unit

Button definitions
The YL81F display is equipped with five buttons on the corresponding operating unit: power button , plus button  , minus button , light button and toggle button (the following is represented by the “i button”).

General operation

Power on/off
Long press power button to power on/off the display. When the display is off, it will not use the battery power and the leakage current is less than 1uA.
The display will automatically shut off if it is not used for more than 10 minutes.

Display interface switching
When the display is powered on, it will show the Current Speed (km/h) and Trip Odometer (km) by default. Short press i button to switch between Trip Odometer(km), Odometer (km), Maximum Speed (km/h), and Average Speed (km/h).

Walk assist mode
Long press and hold minus button, the electric bike enters the walk assist mode. The electric bike will walk at a fixed speed of 6 km per hour and the display shows . Release minus button to stop the power output immediately and restore to the state before walk assist.

Figure 5-2 Walk assist mode interface

The walk assist mode can only be used when pushing the electric bicycle, please do not use it while riding.

Turning on/off lights
Press the light button to make the controller turn on the lights and the display backlight becomes dim. Press light button again to make the controller turn off the lights and the backlight restore brightness.

Figure 5-3 Backlight display interface

PAS level selection
Press plus/minus button to switch PAS level of the electric bicycle, thus changing the motor output power.

Figure 5-4 PAS level display interface

Battery level display
The battery level is shown as 5 bars. When the battery is full charged, all of the 5 bars lighten up. When the battery is fully depleted, the bar will begin to flash, warning the user to charge the battery as soon as possible.

• Full power

• Two bars power

• Four bars power

• Three bars power

• One bar power

• Empty power flashing

Figure 5-5 Battery Level Display Interface

Error code display
If there is a fault occurs in the electronic system of the electric bicycle, the display will automatically show an error code, see Schedule 1 and Schedule 2 for a detailed definition of the error code.

Figure 5-6 Error Code Display

When the error code appears on the display, please troubleshoot the problem in time, the
electric bicycle will not be able to ride normally after the problem occurs.

Personalized parameter settings
Each setting needs to be done with the bicycle stationary.
The personalized parameter setting procedure is as follows:
When the display is ON and the speed shows 0,

1. Press and hold plus and minus button simultaneously for more than 2 seconds to enter the personalized parameter setting interface.
2. Press plus / minus button to toggle between the personalized parameter setting interface, and press i button to enter the parameter changing state.
3. Press plus/ minus button to select the parameter, long pres plus button for addition operation, long press minus button for subtraction operation.
4. Press i button to save the parameter settings and return to the personalized parameter setting interface.
5. Long press i button to save the parameter settings and exit the personalized parameter setting interface.
   The following options are available on the personalized parameter setting interface:

Backlight luminance setting
01P is the backlight luminance setting. Parameters 01, 02 and 03 are available, which represent the backlight luminance, 01 for the minimum luminance, 02 for the standard luminance and 03 for the maximum luminance.

Press the i button to enter the parameter modification interface. Press the plus /minus button for parameter selection. Press the i button to save the parameter and return to the selection interface of general setting options

Figure 6-1 Backlight Luminance Setting Interface

Metric and imperial setting
02P is the metric and imperial setting, 00 for metric and 01 for imperial.
Press i button to enter the parameter changing state. Press the plus / minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-2 Metric and Imperial Units Setting Interface

Rated voltage setting
03P is the rated voltage setting. The available rated voltage range is: 24V, 36V, 48V.
Press i button to enter the parameter changing state. Press the plus / minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-3 Rated voltage setting interface

Automatic Sleep Time Setting
04P is the auto sleep time setting. To save the battery power and reach higher range, this display will be turned off after it has not been used for a time. The adjustable range is: 1~60min, 00 means no auto shutdown. The factory default setting is 10 minutes.
Press i button to enter the parameter changing state. Press the plus / minus button to select the parameter, press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-4 Auto Sleep Time Setting Interface

PAS level setting
05P is the pedal assist level setting. The available PAS level settings are: 0~3, 1~3, 0~5, 1~5, 1~7, 0~7, 0~9, 1~9.
Press i button to enter the parameter changing state. Press the plus / minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-5 PAS level setting interface

Tire diameter setting
06P is the tire diameter setting. The adjustable tire diameter range is: 1~50inch.
Press i button to enter the parameter changing state. Press the plus / minus button to select the parameter, press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-6 Tire diameter setting interface

Number of speed sensor magnets setting
07P is the speed sensor magnet number setting. The adjustable speed sensor magnet number range is: 1 ~ 255 pcs.
Press i button to enter the parameter changing state. Press the plus/ minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-7 Number of speed sensor magnets setting interface

Speed Limit Setting
08P is the speed limit setting. The adjustable speed limit range is: 1~100km/h. (The maximum adjustable speed limit varies by different protocols).
Press i button to enter the parameter changing state. Press the plus / minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-8 Speed limit setting interface

Start-up setting
09P is the start-up setting. The display can choose the following start modes: 00→zero start, 01→non-zero start.
Press i button to enter the parameter changing state. Press the plus/minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-9 Start-up setting interface

Ride mode setting
10P is the ride mode setting. The available ride modes are: 00→Pedal assist only, 01→ Electric only, 02→Both Pedal assist and electric.
Press i button to enter the parameter changing state. Press the plus/minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-10 Ride mode setting interface

Pedal assist sensitivity setting
11P is the pedal assist sensitivity setting. When set to higher numbers, it will take more crank rotations to activate the motor. On lower numbers, it will take little crank rotation to activate the motor. The adjustable range is: 1~24.
Press i button to enter the parameter changing state. Press the plus/minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-11 Pedal assist sensitivity setting interface

Pedal assist strength setting
12P is the pedal assist strength setting. The pedal assist strength is the relative strength of the PWM signal from the controller when start to activate pedal assist. The adjustable range is 0 ~ 5. 0 is the weakest strength and 5 is the strongest.
Press i button to enter the parameter changing state. Press the plus / minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-12 Pedal assist intensity setting interface

Number of pedal assist sensor magnets setting
13P is the number of pedal assist sensor magnets setting. The adjustable range: 5, 8, 12 pcs.
Press i button to enter the parameter changing state. Press the plus/minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-13 Number of pedal assist sensor magnets setting interface

Controller current limit setting
14P is the controller current limit setting. The adjustable range is: 1~50A.
Press i button to enter the parameter changing state. Press the plus/minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-14 Controller current limit setting interface

Battery under voltage value setting
15P is the battery under voltage setting. The value can be adjusted based on the current rated voltage.
Press i button to enter the parameter changing state. Press the plus/minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-15 Battery under voltage value setting interface

ODO reset setting
16P is the ODO reset setting. The display can choose the following: 00→non reset, 01→ reset.
Press i button to enter the parameter changing state. Press the plus/minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-16 ODO reset setting interface

Controller cruise control setting
17P is the controller cruise control setting. The display can choose the following: 00→non enable, 01→enable.
Press i button to enter the parameter changing state. Press the plus / minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-17 Controller cruise control setting interface

6km/h walk assist mode setting
18P is the 6km/h walk assist setting. The display can choose the following: 00→turn off walk assist function, 01→turn on walk assist function.
Press i button to enter the parameter changing state. Press the plus/minus button to select the parameter and press i button to save the parameter setting and return to the personalized parameter setting interface.

Figure 6-18 6km/h walk assist setting interface

Shortcut operation

Restore factory settings operation
dEF is the restore factory default parameter settings. dEF-Y is to restore default settings, and dEF-N is not to restore.
Enter into the main setting interface and keep the speed at 0, press and hold light button and plus button simultaneously for 2s to enter the restore factory default setting interface. Pressing plus / minus button to toggle to dEF-Y. Then after pressing i button to confirm, the display will show dEF-0 for a few seconds and then automatically start to restore the factory default settings. The display will automatically exit to setting interface after the restoration.

Figure 7-1 Restore Factory Default Settings Interface

Trip odometer reset operation
The display can record trip odometer and odometer. Trip odometer is not automatically reset after turning off. The trip odometer needs to be reset manually.
Enter into the main setting interface and keep the speed at 0, press and hold minus button and i button simultaneously for 2s to reset the trip odometer. The main interface will flash during the reset process.

Schedule 1: Error Code Definition

YL-01, YL-02 Error codes

Error code| Definition|  | Error code| Definition
E001| Controller failure| E004| Throttle failure
E002| Communication failure| E005| Brake failure
E003| Hall failure| E006| Motor phase failure
YL-05,KDS,YL-J Error codes
Error code| Definition|  | Error code| Definition
E021| Current failure| E024| Hall failure
E022| Throttle failure| E025| Brake failure
E023| Motor phase failure| E030| Communication failure

Schedule 2: Error Code Definition

Customize YL-02(LKLS) Error codes

Error code| Definition| Handling method
Error 05| Brake failure| Check whether the brakes are in position; Replace the brake

handle

Error 06| Low-battery| Check whether the battery needs

recharging

Error 07| Motor phase failure| Check whether the hall wire of

the motor is loose

Error 08| Throttle failure| Whether to return the handle; Check the connection of the handle, if normal, need to

replace the handle

Error 09| Controller failure| Check the cable harness connection of the controller or replace the controller with a

new controller

Error 10| Communication reception failure| Check that the display cable is

properly connected

Error 11| Communication transmission failure| Check that the display cable is

properly connected

References

• Fafrees Ebike

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