KM5S-U LCD Display


Professional-grade lcd display. Classic left-mounted lcd display with metal frame. Integrate the design of display and remote. Popular 5S protocol named after it to meet customer’s DIY and personalized requirements.

Additional information


88.7mm * 50.3mm * 47.9mm


Battery, Headlight, Mile/KM, ODO, PAS Level, Speed, Trip, Trip Time, Walk Assistance, Watt






24V, 36V, 48V

USB Charging

5V/500mA, Without


CE, EN15194:2017, IPX6, RoHS

KM5S-U LCD Display
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    User Manual_KM5S-U eBike LCD Display

    About the User Manual

    Dear users,
    To ensure better performance of your e-bike, please read through the KM5S product introduction carefully before using it. We will use the most concise words to inform you of all the details (including the hardware installation, settings and normal operation use of the display)when using our display. Meanwhile, the introduction will also help you to solve possible confusion and malfunctions.

    Appearance and Size

    Material and Color

    KM5S products are made of PC. Under the temperature of -20 to 60℃, the shell material can ensure normal usage and good mechanical performance.
    Real product and dimension figure(unit: mm)

    Function Summary and Button Definition

    Function Summary

    KM5S provides a wide range of functions and indicators to fit the users’ needs. The indicated contents are as follows.

    • Battery Indicator
    • Motor Power Ratio
    • Speed Display (including running speed, max speed, and average speed)
    • Trip distance and total distance
    • Trip time display of single
    • Cruise control
    • Headlight On/Off
    • Error Code Indicator
    • Various Parameters Settings (like wheel size, speed limited, battery level bar, PAS level, controller limited current, max speed, password enable, and so on.)
    • Recover Default Setting

    Monitor Area

    Button Definition

    KM5S has three buttons. They are M,+,-. In the following introduction, “M” is named “MODE”. “+” is named “UP” and “-” is named “DOWN”.

    Operation Cautions

    • Be careful of the safety use. Don’t attempt to release the connector when the battery is on power.
    • Try to avoid hitting.
    • Don’t split the waterproof sticker to avoid affecting the waterproof performance.
    • Don’t modify system parameters to avoid parameters disorder.
    • Make the display repaired when the error code appears.

    Installation Instruction

    Fix the display onto the handlebar and adjust it to an appropriate visual angle. Tighten all the connectors.

    Normal Operation

    Power On/Off

    Hold the Mode button for 2 seconds then the display will power on, and the display will provide the power to the controller. With the display on, hold MODE to turn off the power supply of the e-bike. With the display off, the display and controller shut down. The leakage current is less than 1 uA.
    Note: When parking an e-bike for more than 10 minutes, the display shut down automatically.

    Display Interface

    After starting up the display, the default show is running speed. Press MODE to change the indicated information in sequence as below: Running Speed (Km/h) → Average Speed (Km/h) → Max Speed (Km/h) → Trip Distance (km) → Total Distance (km) → Travel Time → Running Speed (Km/h).

    Push Cruise Control

    Hold DOWN for 2 seconds to enter the mode of power assistant walk. The e-bike will go on at a uniform speed of 6 Km/h. PUS shows on the screen.
    Note: 6Km/h “Push Cruise Control” function can only be used for pushing the e-bike by hand. Please don’t use this function when riding.

    Turn on/off Backlight

    Hold UP 2 seconds to turn on the backlight of the display, the headlight will be powered on at the same time. Hold UP for 2 seconds again, the backlight is turned off.

    PAS Level Selection

    Hold UP or DOWN to change the output power of the motor. The power ranges from level 1 to level 5. Level 1 is the minimum power. Level 5 is the maximum power. The default value is level 1.

    Battery Indicator

    The 5 battery bars represent the capacity of the battery. When the battery is in low voltage, the battery frame will flash to notice that the battery needs to be recharged immediately.


    Motor Power Monitor

    Motor power showed as below:


    Error Code Information

    If there is something wrong with the electronic control system, the error code will appear automatically. Here is the detailed information on the error code in Table 1 attached.

    Note: Make the display repaired when the error code appears.

    User Setting

    Preparation before Starting

    Make sure all connectors are tightened and the cables are without damage.

    General Setting

    Press the MODE button to start the display, then hold both UP and DOWN for 2 seconds to enter the setting menu.

    Trip Distance and Trip Time Clearance

    TC means trip distance clearance. Press UP or DOWN to choose yes or no to clear the trip distance.

    Note: Trip distance and trip time will be cleared at the same time.


    Backlight Contrast

    BL means backlight. Level 1 is the low brightness. Level 2 is the middle brightness. Level 3 is high brightness. The default level is 1. The bottom of the screen prompts SET2.

    Press UP or DOWN to modify the backlight brightness. Hold MODE to confirm the modification and exit the general setting.

    Pressing UP and DOWN can change the backlight lighting. Long press MODE to confirm and quit Setting Mode.

    Power-on Password Enable/Disable

    The character “-P-” on the bottom of the screen means the page of the password. Hold UP and DOWN both for up to 2 seconds to enter the normal setting, while holding both UP and MODE for 2 seconds again will enter the power-on password enable/disable page.

    Press UP/DOWN to change the number. Press MODE to select digits one by one. After 4 digits of the correct password are entered, press MODE to confirm then select password enable or disable.

    Power-on Password Enable

    Press UP/DOWN to select Y or N, and press MODE to confirm. Power-on Password default disabled.
    y = Power-on Password Enable
    n = Power-on Password Disable


    Power-on Password Modify

    UP and DOWN is to change the number, and MODE is to select digits one by one, and finally to hold MODE to confirm the modification.


    Normal Parameter Setting

    Hold both UP and DOWN for 2 seconds to enter the User setting. But holding both DOWN and MODE over 2 seconds is to enter password 0512 to modify the wheel size.

    Wheel Diameter Setting

    Press UP and DOWN to select the correct value to match the wheel diameter. Selectable values include 16, 18, 20, 22, 24, 26, 700C, and 28. The default diameter is 26 inches.

    Ld means Wheel Diameter.

    Speed-limit Setting

    When the running speed is faster than MAX SPEED, the controller will cut off the motor power. MAX SPEED default setting is 25 km/h. LS means Limit Speed 12Km/h to 40Km/h is selectable. Press UP/DOWN to select the favorite value, then hold MODE for over 2 seconds to confirm and quit the setting mode.


    Personalized Parameter Setting

    Personalized Parameter Settings can match various requirements in use. Settings items are Battery Power Bar Setting, Pedal assistant level Setting, Over-current Cut, Pedal Assistant Sensor Setting, Speed Sensor Setting, and Delay Time Setting. For the details, please see the Attached List 2.

    System Parameter Setting

    Hold UP and DOWN both over 2 seconds to enter the normal setting, while holding UP and DOWN both again is to set up System Parameter, password 2962 must be entered.

    MODE is to confirm and enter the System Parameter Setting page, you can select the option which you want.


    Press UP/DOWN to select, and press MODE to enter the corresponding setting page.

    Battery Power Bar Setting

    Each bar represents a voltage value. 5 voltage values MUST BE entered one by one.

    Press MODE to confirm and UP/DOWN to select the value.

    VOL = voltage

    Pedal Assistant Level Setting

    Pedal Assistant Level Select

    In Pedal Assistant Level Setting, there are 8 modes to select :0-3, 1-3, 0-5, 1-5, 0-7, 1-7, 0-9, 1-9. Press UP/DOWN to select the mode, and press MODE to confirm, then change the ratio of each PAS level.

    0-3 or 1-3 PAS1 shows ECO
    0-3 or 1-3 PAS2 shows TOUR
    0-3 or 1-3 PAS3 shows BOOST
    0-5 or 1-5 PAS1 shows ECO
    0-5 or 1-5 PAS2 shows CITY
    0-5 or 1-5 PAS3 shows TOUR
    0-5 or 1-5 PAS4 shows POWER
    0-5 or 1-5 PAS5 shows BOOST
    0-7 or 1-7 PAS1 shows ECO
    0-7 or 1-7 PAS2 shows ECO
    0-7 or 1-7 PAS3 shows CITY
    0-7 or 1-7 PAS4 shows CITY
    0-7 or 1-7 PAS5 shows TOUR
    0-7 or 1-7 PAS6 shows POWER
    0-7 or 1-7 PAS7 shows BOOST
    0-9 or 1-9 PAS1 or 2 shows ECO
    0-9 or 1-9 PAS3 or 4 shows CITY
    0-9 or 1-9 PAS5 or 6 shows TOUR
    0-9 or 1-9 PAS7 or 8 shows POWER
    0-9 or 1-9 PAS9 also shows BOOST

    PAS Ratio Modify

    Modifying the value of the PAS ratio will meet the different requirements.

    Take the 1 level for example, “45-55 percent” is the range value, the bottom value can be modified, and the default is 50 percent. MODE is used to confirm and turn to the next PAS ratio setting. After all PAS ratios are inputted, please hold MODE for over 2 seconds to confirm the modification and turn to the controller Over-current Cut setting (MODE back to pedal assistant level select page). For the details, please see Attached List 4.

    Controller Over-Current Cut Setting

    CUR means current. CUR value can be changed from 7.0A to 22.0A. Press UP/DOWN to change the value of the current, hold MODE to confirm the setting, and turn to PAS sensor setting.15A is the default value of controller over-current cut.

    Note: According to the different controllers, the value might not be able to be 22A.


    Pedal Assistant Sensor Setting

    The Direction of Pedal Assistant Sensor Setting

    PAS means Pedal Assistant System. “run-F” means forward direction, while “run-b” means back direction. Press UP/DOWN to select F or b, and press MODE to confirm and turn to the PAS sensitivity setting. The default direction is forward.


    The Sensitivity of PAS Setting

    SCN means the sensitivity of PAS, and 2 to 9 can be selected.2 is the strongest, and 9 is the weakest. UP/DOWN is to select the sensitivity value, and MODE is to confirm the selection and turn to the magnet disk setting. SCN default value is 2.

    Proportion parameters Setting Of PAS

    N means the proportion parameter of PAS. Press UP/DOWN to select the parameter, the more power, the more PAS feeling.


    Speed Sensor Selection

    SPS means Speed Sensor. Press UP/DOWN to select the quantity of magnet head (the range is from 1 to 9), and press MODE to confirm and turn to the Throttle Definition page. SPS default value is 1.


    Throttle Definition

    Throttle Enable/Disable

    HL means throttle load, HL: N means function disable, and HL: Y means function enable.

    When HL=Y, the throttle can control the function. Press UP/DOWN to select Y, and press MODE to confirm the selection, otherwise select N to turn to Throttle Vector Enable Setting.

    HL default value is N.

    Throttle Vector Enable/Disable

    HND means throttle. HF: Y means throttle vector enable, HF: N means throttle vector disable. When HF=Y, turn the throttle to change the running speed. Press UP/DOWN to select Y or N, and hold MODE to confirm the selection and quitting. Press MODE to confirm and turn to the throttle definition page.

    System Setting

    The delay time setting of battery power

    DLY means delay time of battery power. Choose delay time 3/6/12s by pressing UP/DOWN, then shortly press MODE, and enter the max speed limited. The default time is 3s.


    Max speed limited

    MAX SPD means max speed limited. Set the max speed when pressing UP/DOWN from 25-40 Km/h. Long time to press MODE, then exit the setting. The default is 40 km/h.

    Note: The standard speed limit setting is based on this setting, not more than this setting value. This setting is the priority version.


    Button PAS Setting

    PUS means pushing. Press UP/DOWN to choose Y/N. Short press MODE, Y means to enable, and N means disable. Short press MODE to confirm and enter into the PAS speed setting. The default value is Y.

    PAS Speed Setting

    Through setting PAS to adjust push speed to meet rider’s requirements.

    The scope is “20%-35%” by pressing UP/DOWN, short press MODE to enter into the slow start-up. The default value is 25%.

    Slowly Startup Setting

    SSP means slowly starting up. The scope is 1-4, 4 means the slowest. Press UP/DOWN to choose. Long press MODE to confirm and exit the setting. The default value is 1.


    Exit setting

    In the setting state, short press MODE (less than 2s) to confirm the input. Long press MODE (more than 2s) is for saving the setting, then quitting the setting state. Long press DOWN (more than 2s), is to cancel the operating but not save setting data.

    Note: If there is no operating in one minute, the display will exit the setting state.

    Recover default setting

    DEF means recover default. Both press UP+MODE to enter the recover default setting. Pressing UP, or DOWN to convert Y or N. N means do not need to recover default setting; Y means entering into password setting. Otherwise, the display will exit. The default state is N.


    Input password: 0368. Short press MODE, UP/DOWN can increase or reduce the number. After inputting 4 passwords, short-press MODE to confirm. The interface is as below. When the display showed DEF:00, it means recovering the default state, then exiting.

    Note: In the recovery default, battery power, ODO, and trip can not be recovered, but the starting-up password can be recovered.


    Q: Why the display is not able to start up?
    A: Check the connector between the display and the controller. Q: How to deal with the error code?
    A: Fix it to the maintenance place immediately.


    The barcode is built up as follows:

    • KM5S=Name
    • 000001=Sequence No.
    • 12=Year of Production
    • 06=Week of Production
    • 3=Battery Voltage
    • 1=sample(0=mass production)
    • 01=hardware version No.
    • 801=software version No.

    Quality assurance and warranty scope

    1. Warranty
      1.  For any quality problems in normal cases and during the guarantee period, our company will be responsible for the warranty.
      2.  The warranty time is 24 months when the display is out of the factory.
    2. Other items
      The following items do not belong to our warranty scope.

      1.  It can not be demolished.
      2.  The damage is caused by the wrong installation or operation.
      3.  Shell is broken when the display is out of the factory.
      4.  The wire is broken.
      5.  The fault or damage is caused by force majeure (such as fire, earthquake, etc,) or natural disasters like lighting, etc.
      6. Beyond Warranty period.

    Connection layout

    Connector line sequence

    User Manual_KM5S-R eBike LCD Display_TopEParts

    Line sequence table

    Line sequence Color Function
    1 Red(VCC) +
    2 Blue(K) Lock
    3 Black(GND)
    4 Green(RX) RX
    5 Yellow(TX) TX

    Note: Some wires use a water-proof connector, so users are able to see the inside color.

    Version changes

    This operating instruction is a general-purpose version(V1.0) Some of the versions f for the display software will be different from the specification, which should depend on the actual use version.

    Attached list 1:Error code definition

    Error Code Definition
    21 Current Abnormality
    22 Throttle Abnormality
    23 Motor Abnormality
    24 Motor Hall Signal Abnormality
    25 Brake Abnormality
    30 Communication Abnormality

    Note: Here is a more general error code for different e-system for your reference.

    Attached list 2: Password table

    NO. Password Setting
    1 512 Using parameter setting password(settled)
    2 Default 1234 Starting up password
    3 2962 Personality setting password(settled)
    4 368 Recovery setting password(settled)

    Attached list 3:Personality Parameter setting

    Attached list 4:Power assist table

    Level/Item 1 2 3 4 5 6 7 8 9
    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%

    Attached list 5:symbol definition

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    Mobile: +1 (631) 780 4666