EBIKELING NC-81F User manual

NC-81F USER MANUAL
Electric Bike Display

TABLE OF CONTENTS
Product Name and Model Number
Spesifications
Appearance and Size
Function Overview and Functional Areas
4.1 Functional Overview
4.2 Functional Areas
4.3 Button Definitons
1
1
1
2
2
3
3
1
2
3
4
Routine Operations 4
4
4
5
5
6
7
7
7
5
5.1 Power On/Off
5.2 Display Interface Switching
5.3 Walk Boost Mode and Cruise Enable Setting
5.6 Battery Level Display
5.4 Turning On/Off Lights
5.7 Error Code Display
5.5 PAS Level Selection
5.8 Brake Prompt Display
Personalized Parameter Settings 8
8
9
9
9
10
10
10
11
6
6.1 Backlight Luminance Setting
6.2 Metric and Imperial Setting
6.3 Rated Voltage Setting
6.6 Wheel Diameter Setting
6.4 Auto Sleep Time Setting
6.7 Number of Speed Sensor Magnets Setting
6.5 PAS Level Setting
6.8 Speed Limit Setting

Shortcut Operation
Quality Assurance and Warranty
Wire Connection Diagram
Precautions
Schedule 1: Error Code Definition
8.1 Warranty Info
9.1 Standard Wire Connection Sequence
8.2 Warranty Doesn’t Cover
11
11
12
12
12
13
13
13
14
15
15
15
15
15
16
16
7
8
9
10
11
6.9 Start-Up Setting
6.10 Drive Mode Setting
6.11 Pedal Assist Sensitivity Setting
6.14 Controller Current Limit Setting
6.12 Pedal Assist Strength Setting
6.15 ODO Resets Setting
6.13 Number of Pedal Assist Sensor Magnets Setting
6.16 Power On Password Setting
TABLE OF CONTENTS

1
Product Name and Model Number
Specification
Appearance and Size
Smart LCD display for electric bicycle; Model: NC-81F.
36V/48V/52V power supply
Display rated current 15mA
Display maximum current 30mA
Shutdown leakage current <1uA
Supplied current to the controller 50mA
Operating temperature -20 ~ 60 °C
Storage temperature -30 to 70°C
1
2
3
NC-81F Display K6 Control Button
K5 Control Button

2
Front View Dimensions Side View Dimensions
Function Overview and Functional Areas
Battery level indicator
Pedal assist (PAS) level indicator
Speed (current speed, maximum speed,
average speed)
Mileage display (single and total mileage)
Walk boost mode
Light ON/OFF
Error code indicator
Cruise control indicator (optional)
Bluetooth connection indicator (optional)
Personalized parameter settings (e.g. wheel
diameter, speed limit, rated voltage setting and
PAS parameter setting, etc.)
Factory default parameter recovery function
4
4.1 Functional Overview
The NC-81F display oers a variety of features to suit your riding needs, including:

3
Battery Level
Error Code
Current Speed
Walk Boost
Trip Odometer
Odemeter
MAx Speed
Average Speed
Speed Unit
KM/H
MPH
Light On/Off
Cruise
PAS Level
Value and Unit
4.2 Functional Areas
4.3 Button Definitions
The NC-81F display is equipped with ve buttons on the corresponding operating unit:
Power On/O
Plus
Minus
Light
Toggle

4
Routine Operations
5
5.1 Power On/Off
5.2 Display Interface Switching
Long press to power on/o the display. When the display is o, it will not use the battery power
and the leakage current is less than 1uA.
When the display is powered on, it will show the Current Speed (km/h) and Trip Odometer (km) by de-
fault. Short press to switch between Trip Odometer(km), Odometer (km), Maximum Speed (km/h),
and Average Speed (km/h).
The display will automatically shut o if it is not used for more than 10 minutes.
Trip Odometer
Average Speed
Odometer
Maximum Speed

5
5.3 Walk Boost Mode and Cruise Enable Setting
5.4 Turning On/Off Lights
Long Press and hold , the electric bicycle
enters the walk boost mode. The electric
bicycle will walk at a xed speed of 6 km per
hour and the display shows . Release
to stop the power output immediately and
restore to the state before walk boost.
Press the to make the controller turn on
the lights and the display backlight becomes
dim. Press again to make the controller
turn o the lights and the backlight restore
brightness.
The whole bicycle is at stable speed, Long
press and the bicycle will enter the
cruise state. The bicycle runs at a constant
speed at the speed you control and screen
display . Press the again or turn the
knob or press the brake, and the bicycle
will exit the cruise state.
The walk boost mode can only be used
when pushing the electric bicycle, please
do not use it while riding.
Helping to implement the display screen
Cruise enable setting interfacescreen Backlight display interface

6
5.5 PAS Level Selection
Press / to switch PAS level of electric bicycle, thus changing the motor output power.
PAS level display interface

7
5.6 Battery Level Display
5.7 Error Code 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 ash, warning the user to charge
the battery as soon as possible.
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 for a detailed denition of the
error code.
When the error code appears on the
display, please troubleshoot the problem
in time, the electric bicycle will not be
able to drive normally after the problem
occurs.
Full Power Two Bars Power
Four Bars Power One Bar Power
Three Bars Power Empty Power Flashing
Error Code Display
5.8 Brake rompt isplay
When you press the brake of the whole vehicle, the rst two digits 8 of the display mileage area will be
prompted with “br”, and the “br” character of the homing brake will disappear, br represents brake,
and the prompt is braking.

8
Personalized Parameter Settings
Each setting needs to be done with the bicycle stationary. Please also note that the following
operations can only be performed within 8 seconds before starting the machine.
The personalized parameter setting procedure is as follows:
When the display is ON and the speed shows 0,
6
Press and hold simultaneously for more
than 2 seconds to enter the personalized
parameter setting interface.
Press / to toggle between the
personalized parameter setting interface, and
press to enter the parameter changing state.
Press / to select the parameter, long
press for addition operation, long press
for subtraction operation.
4)
5)
1)
2)
3)
Press to save the parameter settings and
return to the personalized parameter setting
interface.
Long press 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.
Press the button to enter the parameter
modication interface. Press the button /
for parameter selection.
Press the button to save the parameter
and return to the selection interface of
general setting options.
Backlight Luminance Setting Interface

9
6.2 Metric and Imperial Setting
6.3 Rated Voltage Setting
6.4 Auto Sleep Time Setting
02P is the metric and imperial setting, 00 for
metric and 01 for imperial.
03P is the rated voltage setting. The available
rated voltage range is: 36V, 48V, 52V.
04P is the auto sleep time setting. To save
the battery power and reach higher range,
this display will be turned o 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 to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Metric and Imperial Units Setting Interface
Rated voltage setting interface Auto Power O Time Setting Interface

10
6.5 PAS Level Setting
6.6 Wheel diameter setting
6.7 Number of speed sensor magnets setting
05P is the Pedal assist level setting. The
available PAS level settings are: 0~3, 0~5, 0~9.
06P is the wheel diameter setting. The
adjustable wheel diameter range is: 1~50inch.
07P is the speed sensor magnet number
setting. The adjustable speed sensor magnet
number range is: 1 ~ 255 pcs.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
PAS level setting interface Wheel diameter setting interface Number of speed sensor magnets setting

11
6.8 Speed Limit Setting
6.9 Start-up Setting
6.10 Drive Mode Setting
08P is the speed limit setting. The adjustable
speed limit range is: 1~100km/h. (The
maximum adjustable speed limit varies by
dierent protocols).
09P is the start-up setting. The display can
choose the following start modes: 00 = zero
start, 01 = non-zero start.
10P is the drive mode setting. The available
drive modes are: 00 = Pedal assist only,
01 = Electric only, 02 = Both Pedal assist
and electric.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Speed limit setting interface Start-up setting interface Drive mode setting interface

12
6.11 Pedal Assist Sensitivity Setting
6.12 Pedal Assist Strength Setting
6.13 Number of pedal assist sensor
magnets 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.
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.
13P is the number of pedal assist sensor
magnets setting. The adjustable range: 5-12
pcs.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Pedal assist sensitivity setting interface Pedal assist Start-up intensity interface
Number of pedal assist sensor magnets setting interface

13
6.14 Controller Current Limit Setting
6.15 ODO resets setting
6.16 Power-on password setting
14P is the controller current limit setting. The
adjustable range is: 1~50A.
15P is the ODO resets setting. The display can
choose the following: 00 = non reset,
01 = reset.
16P is the power-on password setting option.
The power-on password is not activated by
default but users can activate it from setting
PSd-y. The factory default passwword is 1212.
Users can set other four-digit password.
Press to enter the parameter changing
state. Press the / to select the
parameter. PSd-y means the power-on
password is activated while PSd-n is o.
Press to comrm the mode and enter
the state of setting the four digits power-
on password or exit to the personalized
parameter setting interface.
Attention!!! Please keep the password in
mind after changing it, otherwise you will
not be able to use the display.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Press to enter the parameter changing
state. Press the / to select the
parameter and press to save theparameter
setting and return to the personalized
parameter setting interface.
Controller current limit setting interface ODO resets setting interface

14
In the password setting mode, the adjustable digit will ash. Press the / to select the
parameter and press to save the numbers and go to the next digit setting. Long press to
save the parameter setting and return to the personalized parameter setting interface after nish
setting the four digits in turn.
Power-on Password OFF
interface
Power-on Password
Activated interface
Restore Factory Default Settings Interface
Power-on password setting
interface
Shortcut Operation
7
7.1 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 and simultaneously
for 2 seconds to enter the restore factory default setting interface.
Pressing / to toggle to dEF-Y. Then after pressing to conrm, 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.

15
7.2 Trip odometer reset operation
The display can record trip odometer and
odometer. Trip odometer is not automatically
reset after turning o. The trip odometer
needs to be reset manually.
Enter into the main setting interface and
keep the speed at 0, press and hold and
simultaneously for 2s to reset the trip
odometer. The main interface will ash during
the reset process.
Trip Odometer Reset Interface
Display connector (Male terminal)Display connector (Female terminal)Controller connector
Quality Assurance and Warranty
Wire connection diagram
8
9
8.1 Warranty info
9.1 Standard wire connection sequence
8.2 Warranty does not cover
Yolin will oer a limited warranty for any failure
caused by the product defects under normal
use during the warranty period.
The product is warranted for 12 months from
the date out of factory.
The shell is opened.
The connector is damaged.
Scratches on the appearance after the product
is out of factory.
Scratched or broken wires
Failure or damage caused by force majeure
(e.g. re, earthquake, etc.) or natural disaster
(e.g. lightning strike, etc.)
Out of warranty period.

16
Standard Wire Sequence Standard wire color Function
1 Red (VCC) Display power wire
2 Blue (Kp) Controller power wire
3 Black (GND) Display ground wire
4 Green (RX) Display data reception wire
5 Yellow (TX) Display data transmit wire
Some models are equipped with waterproof connectors and the color inside wires can not be seen.
Precautions
Schedule 1: Error Code Definition
Pay attention to all the general operating when using the products and do not plug and unplug the
display while it is powered on.
10
Avoid bumping the display as much as possible.
Please do not change the parameter settings
at will, otherwise normal riding cannot be
guaranteed.
If display does not work properly, please send it
to the repair center as soon as possible.
There may be dierences between the physical
products and this manual due to normal upgrade.
Please refer to the physical products.
ERROR CODE DEFINITION
EE01 Controller failure
EE02 Communication failure
EE03 Hall failure
ERROR CODE DEFINITION
EE04 Throttle failure
EE05 Brake failure
EE06 Motor phase failure
NC-01, NC-02 Error codes