FAFREES FF20 Polar User manual

Smart EV/Moped
User Manual
(Model: FF20 Polar)
EN DE FR IT ES

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*Before your first operation,
please read the user manual carefully!
1. 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.
2. 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 danger¬ous situations. Please don't offer your e-bike to anyone that 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.

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1. 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.
2. 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 danger¬ous situations. Please don't offer your e-bike to anyone that 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 (Model: FF20 Polar)
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

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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.
Function introduction:

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Product installation:
1. After removing the foam, unfold and secure the frame as shown.
3. Install the saddle. Insert the saddle into the seat tube and lock.
2. Install the handlebar. Insert the handlebar into the tube and lock.

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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.

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Product parameter
Display user instructions
1. Product Name and Model Number
Smart LCD display for electric bicycle; Model: YL81F.
2. 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
Dimensions
Performance Parameter
Electrical Specifications
Features
Item
Main material
Product size
Pedal-ground distance
Tire size
Package size
Product weight
Package weight
Battery weight
Maximum load
Maximum speed
Max range for pure power
Maximum climbing angle
Operating temperature
Waterproof level
Battery type
Battery capacity
Battery rated voltage
Motor rated voltage
Motor rated power
Charging voltage
Input voltage
Undervoltage protection value
Overcurrent protection value
Charging time
Display
Headlight
Braking method
Speed Transmission
Parameter
Aluminum alloy
179*121*68CM
16CM
20*4.0
95*45*79CM
34KG
41.9KG
3.1KG & 3.65KG
150KG
25KM/H
95~115KM
25°
-20℃~55℃
IPV4
Lithium-ion battery
10.4Ah & 10.4Ah
48V
48V
500W
54.6V/3A
220V
40±1V
20A
3-4H each battery
LCD
Yes
Mechanical disc brakes
SHIMANO 7S

Figure 3-1 Physical picture of
the YL81F display
Figure 3-3 90T-V Front
View Dimension
Figure 3-2 Physical picture of
the K5 control button
Figure 3-4 90T-V Side
View Dimension
4. Function overview and Functional areas
4.1 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
3. Appearance and Size
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● 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
4.2 Functional areas

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4. Function overview and Functional areas
4.1 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
4.2 Functional areas
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
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2
3
4
5
6
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8
10
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Figure 4-1 YL90T-V functional area distribution interface

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4.3 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”).
5. General operation
5.1 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.
5.2 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).
Figure 5-1 Display Interface Switching
Trip Odometer Odometer
Average Speed Maximum Speed

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5.3 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.
The walk assist mode can only be used when pushing the electric bicycle, please do not use
it while riding.
5.4 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 5-2 Walk assist mode interface
Figure 5-3 Backlight display interface

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5.5 PAS level selection
Press plus/minus button to switch PAS level of the electric bicycle, thus changing the motor
output power.
5.6 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.
Figure 5-4 PAS level display interface
Figure 5-5 Battery Level Display Interface
Four bars powerFull power
Two bars powerThree bars power
Empty power flashingOne bar power

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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.
6. 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:
6.1 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.
5.7 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

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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
Figure 6-2 Metric and Imperial Units Setting Interface
6.2 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.

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Figure 6-3 Rated voltage setting interface
Figure 6-4 Auto Sleep Time Setting Interface
6.3 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.
6.4 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.

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Figure 6-5 PAS level setting interface
Figure 6-6 Tire diameter setting interface
6.5 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.
6.6 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.

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Figure 6-7 Number of speed sensor magnets setting interface
Figure 6-8 Speed limit setting interface
6.7 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.
6.8 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.

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6.9 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
Figure 6-10 Ride mode setting interface
6.10 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.