Yolin YL80C User manual

The eBike Display
User's Manual
YL80C

Content
Product Name and Model.................................................................................................................................................................. 1
Specification Parameters....................................................................................................................................................................1
Appearance Dimensions..................................................................................................................................................................... 1
◆Physical Drawing and Dimensional Drawing (unit:MM)........................................................................................................................................1
Functional Overview and Functional Area Distribution................................................................................................................ 3
◆Function Overview..................................................................................................................................................................... 3
◆Functional Area Distribution.................................................................................................................................................... 3
◆Button Definition........................................................................................................................................................................ 4
General Operations............................................................................................................................................................................ 4
◆Power On/Off.............................................................................................................................................................................4
◆Display Interface........................................................................................................................................................................ 4
◆Assist in Implementation........................................................................................................................................................... 4
◆Turn the Backlight On/Off......................................................................................................................................................5
◆Boost Gear Selection.................................................................................................................................................................. 5
◆Electricity Display...................................................................................................................................................................... 6
◆Motor Power Indication.............................................................................................................................................................6
◆Error Code Display.................................................................................................................................................................... 6
General Settings.................................................................................................................................................................................. 6
◆Single Mileage Clear.................................................................................................................................................................. 6
◆Backlight Brightness.................................................................................................................................................................. 7
◆Conversion of Imperial and Metric Units................................................................................................................................ 7
General Parameter Settings...............................................................................................................................................................8
◆Wheel Diameter Setting............................................................................................................................................................. 8
◆Speed Limit Setting.................................................................................................................................................................... 8
Personalization....................................................................................................................................................................................8
◆Battery Charge Setting.............................................................................................................................................................. 9
◆Assist Parameter Setting (Option)............................................................................................................................................ 9
Boost Gear Selection.................................................................................................................................................................. 9
Assist Proportion Value Setting.............................................................................................................................................. 10
◆Current Limit Value Setting (Option)....................................................................................................................................10
◆Boost Sensor Settings (Option)................................................................................................................................................11
Direction Setting of Assist Sensor........................................................................................................................................... 11
Assist Sensor Sensitivity Setting..............................................................................................................................................11
Setting of Magnetic Steel Number of Helper Disk................................................................................................................ 11
◆Speed Sensor Settings (Option)............................................................................................................................................... 12
◆Turn Band Function Settings (Options).................................................................................................................................12
Turn Handle Assisted Push Enable Setting........................................................................................................................... 12
Rotary Handle Gear Enable Setting.......................................................................................................................................12
◆System Settings (Options)........................................................................................................................................................13
Electricity Delay Time Setting................................................................................................................................................ 13

Key Assisted Push Enable Settings......................................................................................................................................... 13
Slow Start Settings................................................................................................................................................................... 14
◆Boot Password Settings............................................................................................................................................................ 14
Boot Password Enable............................................................................................................................................................. 14
Switch-on Password Modification.......................................................................................................................................... 15
◆Exit Settings.............................................................................................................................................................................. 15
Restore Default Settings................................................................................................................................................................... 15
Quality Commitment and Warranty Scope................................................................................................................................... 16
Lead Connection Diagram............................................................................................................................................................... 16
Precautions........................................................................................................................................................................................ 17
Schedule1 : Error Code Definition Table.......................................................................................................................................17
Schedule2 : Boost Gear Proportion Default Value Table............................................................................................................. 17

1
Product Name and Model
Intelligent Liquid Crystal Instrument for Electric Bicycle; Model: YL80C.
Specification Parameters
●24V/36V/48V power supply
●Rated working current of instrument 10mA
●The maximum working current of the instrument is 30mA
●Shutdown leakage current < 1uA
●The operating current supplied to the controller is 50mA
●Working temperature-20 ~ 60 ℃
●Storage temperature-30 ~ 70 ℃
Appearance Dimensions
◆Physical Drawing and Dimensional Drawing (unit: mm)

2
Physical Drawing and Dimensional Drawing

3
Functional Overview and Functional Area Distribution
◆Function Overview
YL80C meters provide a variety of functions to meet your riding needs, including:
●Electricity Display
●Motor power indication
●Boost gear adjustment and indication
●Speed display (including real-time speed, maximum speed and average speed)
●Mileage display (including single mileage and total mileage)
●Assist in implementing control and display
●Backlight control and display
●Error Code Display
●USB Connection Indication (Option)
●Heart Rate Display (Option)
●A number of parameter settings (e.g. Wheel diameter, speed limit, battery power setting and assistance parameter setting,
startup password setting, controller current limit setting, etc.)
●Default parameter recovery function
◆Functional Area Distribution
YL80C Functional Area Distribution Interface

4
◆Button Definition
There are five keys on the corresponding operation unit of YL80C instrument, of which the keys
are replaced by the words "UP" and "DOWN" respectively in the following instructions.
General Operations
◆Power On/Off
After pressing the key for a long time, the instrument starts to work and turns on the working power supply of the
controller. In the startup state, the electric vehicle can be turned off by pressing the key for a short time. Source,in the
shutdown state, the instrument no longer uses the battery power supply, and the leakage current of the instrument is
less than 1uA.
■If the electric vehicle is not used for more than 10 minutes, the instrument will automatically shut down.
◆Display Interface
After the instrument is turned on, the instrument displays the real-time speed and total mileage (km) by default. Press the
"i" key briefly to display information switching between real-time speed (km/h), single mileage (km), total mileage (km),
maximum speed (km/h), average speed (km/h) and riding power.
Display Interface Switch
◆Assist in Implementation
Press the DOWN button for a long time, and the electric vehicle enters the electric assistance pushing state. Electric vehicles
run at a constant speed of 6 km/h. At the same time, the screen shows .
Release the DOWN button and the electric vehicle will immediately stop power output and return to the state before
the push.

5
Helping to Promote Display Interface
◆The boosting function can only be used when the user pushes the electric vehicle, and should not be used in the
riding state.
◆Turn the Backlight On/Off
Press the headlight key briefly to dim the backlight of the instrument and notify the controller to turn on the headlight
at the same time. When the external light is insufficient or driving at night, the headlights of the whole vehicle can be turned
on. Press the headlight key again, the instrument backlight turns on and the controller is notified to turn off the headlight.
Open the Backlight Display Interface
◆Boost Gear Selection
Press the UP/DOWN button briefly to switch the assist gear of the electric vehicle, thus changing the output power of
the motor. The default output power range of the instrument is 0-3 gears, 0 gears are 0 power output, 1 gears are the lowest
power, and 3 gears are the highest power. When the 3rd gear is reached, press the UP button briefly again, and the interface
will still display 3. The number 3 will remain unchanged, which is the highest grade. After the power downshift reaches
gear 0, press the DOWN button briefly again, and the interface still displays 0. The number 0 remains unchanged, which is
the lowest gear. The default gear for instrument startup is 1st gear.
Gear Switching Display Interface

6
◆Electricity Display
The five-segment display of battery power shows that when the battery voltage is high, the five-segment LCD is on,
and when the battery is under-voltage, the outer frame of the battery flashes at a frequency of 1HZ, indicating the need to
charge immediately.
Battery undervoltage flicker
Battery Charge Display Interface
◆Motor Power Indication
The output power of the motor can be known through the instrument. The display mode is shown in the following
figure.
Motor Power Display Interface
◆Error Code Display
When the electric control system of the electric vehicle fails, the instrument will automatically display the error code.
See Table 1 for the definition of the detailed error code.
Error Code Display Interface
■When there is an error code in the display interface, please troubleshoot the fault in time. After the fault occurs,
the electric vehicle will not run normally.
General Settings
Press the key for a long time to start the machine. In the startup state, when the vehicle is stationary, press and
hold the UP + DOWN key for more than 2 seconds at the same time, and the instrument enters the normal setting state.
■Each setting item needs to be made with the vehicle stationary.
◆Single Mileage Clear

7
TC stands for clearing the single mileage. Y/N can be selected through the UP/DOWN key, and “Y” means clearing
the mileage of a single ride. “N” means a single ride that is not cleared
Line mileage. Press the "i" key briefly to confirm and enter the backlight brightness setting state.
Single Mileage Clearing Operation Interface
◆Backlight Brightness
BL stands for backlight. Parameters 1, 2, 3 can be set to indicate backlight brightness, 1 is the darkest, 2 is the standard
brightness, and 3 is the brightest. The default value of the instrument factory is 1. The backlight brightness parameter can be
changed through the UP/DOWN key. Press the "i" key for a short time to confirm and enter the metric-imperial unit
conversion setting state, and press the "i" key for a long time to confirm and exit the normal setting state.
Backlight Brightness Setting Interface
◆Conversion of Imperial and Metric Units
U for units, 1 for imperial system and 2 for metric system. Speed and mileage units can be converted through
UP/DOWN key, short press "i" key to confirm, long press "i" key to confirm and exit the normal setting state. The default
unit of the instrument is metric.
Imperial and Metric Unit Conversion Settings Interface

8
General Parameter Settings
Press and hold the UP + DOWN key for more than 2 seconds At the same time to enter the normal setting state. Press
and hold the DOWN + i key for more than 2 seconds at the same time to enter the wheel diameter setting interface.
◆Wheel Diameter Settings
Ld represents the wheel diameter and can be set at 8-26, 700C, 28-30. Select the corresponding wheel diameter of the
vehicle through UP/DOWN key to ensure the accuracy of instrument speed display and mileage display. The default wheel
diameter value of the instrument factory is 26inch. Press the "i" key briefly to enter the speed limit setting interface.
Wheel Diameter Setting Interface
◆Speed Limit Settings
The default value of the highest riding speed of the instrument leaving the factory is 25Km/h. Changing this value can
set the highest riding speed of the electric vehicle. When the electric power exceeds the set value, the controller will stop
supplying power to the motor to protect the riding safety. LS indicates the speed limit. The optional range of the maximum
speed setting value is between 12Km/h and 40Km/h, which can be added/subtracted through UP/DOWN key. Press the "i"
key for a long time to confirm and exit the setting state.
Speed Limit Setting Interface
Personalization
In order to meet the personalized use requirements of customers, personalized settings are set up, including the battery
power setting, power parameter setting, current limit value setting, power sensor setting, speed sensor setting, handle
function setting, system setting and startup password setting of the instrument, with a total of eight settings. At the same
time, press and hold the UP + DOWN key for more than 2 seconds to lift it to enter the normal setting state; Press and hold
the UP + DOWN key again for more than 2 seconds at the same time to enter the instrument personalization item selection
interface;
Select the content to be set through UP/DOWN, and press "i" to enter the corresponding setting interface.

9
Personalization Item Selection Interface
◆Battery Charge Setting
VOL represents voltage and requires 1 to 5 voltage values to be input one by one. Take the first electric quantity value
as an example: "1" in the screen represents the first voltage and "34.5" is the first electric quantity value. Add/subtract
settings are made through UP/DOWN key, press "i" key briefly to confirm and enter the next electric quantity setting
interface; After the 5 electric quantity values are set, press the "i" key for a long time to confirm and return to the instrument
setting item selection interface.
Battery Charge Setting Interface
◆Assist Parameter Setting (Option)
Boost Gear Selection
Eight modes are provided in the booster gear selection: 0-3, 1-3, 0-5, 1-5, 0-7, 1-7, 0-9, 1-9; Through UP/DOWN
switching, press the "i" key briefly to confirm and enter the assistance proportion value setting interface in the corresponding
mode. The instrument default mode is 0-5.

10
Booster Gear Selection Interface
Assist Proportion Value Setting
By setting the value of the assistance ratio, the speed of each gear can be adjusted to meet the needs of different riders.
Take 1st gear as an example, "45-55%" is the range of 1st gear assistance ratio, and "50%" is the default value of 1st gear,
which is a settable value. Add/subtract settings are made through UP/DOWN key. Press "i" key briefly to confirm and enter
the next assistance ratio setting, up to 9 can be set. After the setting is completed, press "i" key long to confirm and return to
the instrument setting item selection interface. Please refer to Schedule 2 for details.
Assist Proportion Value Setting Interface
◆Current Limit Value Setting (Option)
CUR represents current limit, which can be set in the range of 7.0-25.0 A, and the maximum current value of the
controller can be changed through UP/DOWN key. Press the "i" key for a long time to confirm and return to the instrument
setting item selection interface. The factory default value of the instrument is 15.0 A.
Current Limit Value Setting Interface

11
◆Boost Sensor Settings (Option)
Direction Setting of Assist Sensor
PAS stands for the booster sensor, and run-F/b is displayed on the screen. run-F stands for the forward direction and
run-b stands for the reverse direction; Through the UP/DOWN key , press the "i" key briefly to confirm and enter the
sensitivity setting of the power sensor. The factory default value of the instrument is forward.
Assist Sensor Direction Setting Interface
Assist Sensor Sensitivity Setting
SCN is displayed on the screen, which represents the sensitivity of the booster sensor. The setting range is 2-9, where
2 indicates the highest sensitivity and 9 indicates the lowest sensitivity; Add/subtract settings through UP/DOWN key,
press "i" key briefly to confirm and enter the power sensor proportional parameter setting interface. The factory default
value of the instrument is 2.
Assist Sensor Sensitivity Setting Interface
Setting of Magnetic Steel Number of Helper Disk
N-Represents the number of magnetic steels on the booster disk. The corresponding number of magnetic steels on the
booster disk can be selected through the UP/DOWN key. Press the "i" key briefly to confirm and enter the booster sensor
setting interface. The default number of disk magnets is 12.

12
Assist Disk Magnetic Steel Number Setting Interface
◆Speed Sensor Settings (Option)
SPS represents a speed sensor, which can be set according to the number of magnetic heads installed on the wheels of
the electric vehicle, with a setting range of 1-15; Modify by pressing UP/DOWN key for a short time, press "i" key for a
long time to confirm and return to the instrument setting item selection interface. The factory default value of the instrument
is 1.
Speed Sensor Magnetic Steel Selection Interface
◆Turn Band Function Settings (Options)
Turn Handle Assisted Push Enable Setting
Hnd means the rotary handle, HL means the rotary handle assists in pushing, HL-N means the rotary handle has no
assist in pushing function, and HL-Y means the rotary handle has assist in pushing function. When the rotary handle is
turned, the instrument enters the assist in pushing mode; You can switch Y/N through UP/DOWN key, press "i" key
briefly to confirm, if Nis selected, you will enter the turning handle gear enable setting interface; Otherwise, return to the
instrument setting item selection interface. The factory default value of the instrument is N.
Turn the Handle to Assist in Pushing the Setting Interface
Rotary Handle Gear Enable Setting
HF-Y means that the rotating handle is divided into gears, HF-N means that the rotating handle is not divided into
gears. If the rotating handle is selected to be divided into gears, it means that when the rotating handle is rotated, the
maximum speed can only reach the corresponding speed corresponding to the gear displayed on the instrument. If the
rotating handle is selected not to be divided into gears, it means that when rotating the rotating handle, it is not limited by
the gears displayed on the instrument and can reach the rated maximum speed. Y/N can be set through the UP/DOWN key,
and the "i" key is briefly pressed to confirm and return to the enabling setting interface for the rotary handle to assist in
pushing. Press the "i" key for a long time to confirm and return to the instrument setting item selection interface. The
factory default value of the instrument is N.

13
Rotating Handle Gear Enable Setting Interface
◆System Settings (Options)
Electricity Delay Time Setting
dLY represents the power delay time, and the power delay time of 3/6/12s can be selected through UP/DOWN key.
Press the "i" key briefly to confirm and enter the maximum speed limit setting interface. The instrument factory defaults to
3s.
Electricity Delay Time Selection Interface
Key Assisted Push Enable Settings
PUS represents the push enable of the key, Y/N can be switched through the UP/DOWN key, Yrepresents the enable,
and Nrepresents the non-enable; Press the "i" key briefly to confirm and enter the assist push speed setting. The factory
default value of the instrument is Y.
Key Assists in Pushing Enable Setup Interface

14
Slow Start Settings
SSP stands for slow start, with an adjustable range of 1-4, and 4 stands for the slowest. You can select through the
UP/DOWN key, press the "i" key for a long time to confirm and exit the setting. Instrument factory default 1.
Slow Start Setting Interface
◆Boot Password Settings
Press the "i" key to enter the password setting state, and the screen prompts "P2" to indicate the boot password. Press
the "i" key to shift, add/subtract the input value through the UP/DOWN key, and press the "i" key to confirm after the 4-
digit password is input. If the password is correct, enter the boot password enable setting interface, otherwise stay in the
password input state. The default boot password is 1212.
Boot Password Input Setting Interface
Boot Password Enable
After inputting the password, enter the password enable interface, and select Y/N through the UP/DOWN key. Yindicates
that the boot password is required and Nindicates that the boot password is not required.
Press the "i" key briefly to confirm. If Y is selected, press the "i" key briefly to enter the password modification state,
otherwise exit the password setting and return to the instrument setting item selection interface.
The default of instrument factory is N.

15
Password Enable Confirmation Interface
Switch-on Password Modification
The instrument displays P3. Press the "i" key briefly to shift, and add/subtract the input value through the UP/DOWN
key. After modification, press the "i" key for a long time to save and confirm, and exit the setting interface. Restarting the
instrument will display P1, 0000, and the instrument will not work normally until the correct password is entered.
Password Modification Interface
◆Exit Settings
In the setting state, pressing the "i" key briefly (within 2 seconds) is to confirm the input and save the current setting;
Press the "i" key for more than 2 seconds to confirm the saving of the current setting and exit the current setting state; Press
the DOWN key for more than 2 seconds to cancel the current operation and exit the setting, and do not save the current
setting data.
■No operation is carried out within one minute, and the instrument automatically exits the setting state.
Restore Default Settings
dEF stands for restoring the default parameters, Press and hold the UP + i key for more than 2 seconds at the same
time under the normal display interface, You can enter the interface of restoring default parameters. Switch Y/N through
UP/DOWN key. Yindicates that the default parameters need to be restored and Nindicates that the default parameters do
not need to be restored. If Yis selected, the instrument will automatically start restoring the default settings and display
dEF-00 after pressing the "i" key for more than 2 seconds for confirmation. After restoring the default, it will automatically
exit and return to the normal display interface.

16
Restore Default Settings Interface
Quality Commitment and Warranty Scope
I. Warranty Information:
1. The Company will be responsible for providing limited warranty during the warranty period for any failure
caused by the quality problem of the product itself under normal use conditions.
2. The warranty period of the product shall be within 24 months after the instrument leaves the factory.
II. The following circumstances do not fall within the warranty scope
1. The shell is opened
2. Connector is damaged
3. After the instrument leaves the factory, the shell is scratched or damaged
4. Scratches or ruptures of the instrument lead-out line
5. Failure or damage caused by force majeure (such as fire, earthquake, etc.) or natural disasters (such as
lightning strike, etc.)
6. The product exceeds the warranty period
Lead Connection Diagram
Standard connector wire sequence
Connecting end
with Controller
Instrument Outlet End
Switch Wiring
Table: Standard Connector Line Sequence Table
Line
Color
Functions
1
Red (VCC)
+
2
Blue(Kp)
Lock
3
Black(GND)
-
4
Green(RX)
RX
5
Yellow(TX)
TX
■The leads of some products use waterproof connectors, and users cannot see the color of the leads in
the wiring harness.

17
Precautions
Pay attention to safety during use, and do not plug and unplug the instrument under the condition of
power supply.
◆Try to avoid bumping on the instrument.
◆Regarding the background parameter setting of the instrument, please do not change it at will, otherwise
normal riding cannot be guaranteed.
◆When the instrument cannot be used normally, it should be sent for repair as soon as possible.
Schedule 1: Error Code Definition Table
Error Code
Definition
21
Current Abnormality
22
Throttle Abnormality
23
Motor Abnormality
24
Motor Hall Signal Abnormality
25
Brake Abnormality
30
Communication Abnormality
Schedule 2: Boost Gear Proportion Default Value Table
Level
1
2
3
4
5
6
7
8
9
Level selection
0-3/1-3
50%
74%
92%
—
—
—
—
—
—
0-5/ 1-5
50%
61%
73%
85%
96%
—
—
—
—
0-7/ 1-7
40%
50%
60%
70%
80%
90%
96%
—
—
0-9/ 1-9
25%
34%
43%
52%
61%
70%
79%
88%
96%