VBike APT TFT 850C User manual

APT TFT 850C LCD display

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1. Product Name
TFT LCD display
Model : APT TFT 850C
1．Suppliers
TIANJIN TXED SCIENCE & TECHNOLOGY. CO., LTD.
Address: Unit A, Bldg E, Xin Mao Science & Technology Park, Hua Yuan Industrial
2．Electrical Parameters
3.2inch IPS screen
24V/36V/48V battery supply
Rated operating current : 40mA
Max operating current : 100mA (36V battery, with USB equipment changed)
USB changing port : 5V 500mA
Off leakage current < 1uA
Max output current to controller : 100mA
Operating temperature : -20～70℃, Storage temperature : -30～80℃
3．Dimensions & Material
Product shell is ABS, transparent window is made with high strength Acrylic.
Dimensions : host/L92mm*W60mm*H14mm

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4．Features
Suitable for low temperature，Max -20℃.
High-contrast 3.2inch IPS colorful matrix screen.
Ergonomic external button design, easy to operate.
Speed display : AVG SPEED, MAX SPEED, SPEED(Real-time).
Kilometer / Mile : Can be set according to customers’ habits.
Smart battery indicator : Provide a reliable battery indicator.
9-level Assist : 3-level/5-level/9-level optional.
Mileage indicator : Odometer/Trip distance/ Clock/ Riding time.
Power indicator : real time power indicator, digital or analog.
Battery information（needs to be supported by battery communication）
DST indicator（needs to be supported by battery communication）
Self-Testing
Speed limit value indicator Error code indicator.
Light sensor（Optional ）
Software upgraded : Software can be upgraded through UART.
USB charging port : 5V/500mA

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5．TFT screen instructions
6．Functional Description
6.1 Power On/Off
Press and hold button for 1 second can turn on/off the display. The Display can
automatically shut down when there is no operate & ride for X minutes（X could be 0~9
）.
*If the display has been set password power on, you need to input the right password before start.
6.2 Assist level operating
Short press button can change the assist level. Top assist level is 9, 0 for
neutral. Level quantities can be adjusted according to the customer
requirements.
Power
UP/DOWN
Battery
Brake Signal
Front Light
Clock
Power loop
Speed value
Power
Assist level
Power indicator
Mileage
Time
Speed Scale
Power Scale
LOGO
Switchover area

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6.3 Speed & Mileage mode switch
Short press button can change the speed and mileage mode,
TRIP→ODO→RANGE→TRIP→TIME→MAX SPEED→AVG
SPEED
**If there is no operation for 5 seconds, display will return Speed (Real-Time) display automatically.
6.4 Headlight/backlight On/Off
Press and hold button for 1 second can turn on/off the headlight, and the scree will
switch to the corresponding mode.
*The motor does not work when the battery voltage is low, Display still can keep the headlight on for a
while when E-bike is in riding.
Daytime mode night mode
POWER
UP

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6.5Walking mode (6km)
Press and hold button for 2 second can get into walking mode, out of the mode
when release the button.
* This feature needs to be supported by controller.
6.6 Data cleanup
Press and hold buttons together for 1 second can reset several temporary
data, temporary data include AVG Speed / MAX Speed / Trip /
Time.
* These temporary data can’t be erased by power off.
7．Parameter setting
Double press button (press interval less than 0.3 second) can get into setting
menus, press
button can
switch to next item. Double press button will exit from menu.
* Display will automatically quit menu when there is no operation for 30 seconds.
* For safety reasons, display can’t get into MENU when riding.
* Display will quit MENU when start riding.
The order of parameters are as follow.
DOWN
UP
&
DOWN
POWER
UP/DOWN
buttons to change the parameter setting, press
POWER
POWER

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8.1 Language：Default EN, Un adjustable
8.2 System : Press Up / Down button to switch between Metric / Imperial.
8.3 Brightness : Press Up / Down button to change the brightness of the backlight,
׀is darkness，׀׀׀׀׀ is brightness
Note : You can set brightness independently between Daytime mode and Night mode.
8.4 Auto off : Press UP/DOWN button to change the auto power off time, from 1 to
9/OFF, the number represent time (minutes) to shutdown, OFF means disable
auto off function, default value is 5 minutes.

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8.6 Battery Ind : Press UP/DOWN button to change the battery indicator, Voltage /
Percentage / OFF.
*Accurate percentage needs communication with battery.
8.5
Scenes
:Only Analog (default)

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Voltage Percentage OFF 8.7 Pow Ind : Press
UP/DOWN button to change the Power indicator, Power / Current.
* This data represent power output of the battery (not motor).

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8.8 Clock : Clock setting, press POWER button get into the clock setting menu,
press UP/DOWN button to set Year/Month/Day/Hour/Min/Sec.
Note : There is an battery inside to sustain clock working when display is powered off, the battery can be charged when display is
power on (riding).Battery often be exhausted after long time unused (after winter or transportation), you need to recharge the
battery as below.
Set Menu : Auto off -> OFF (make display can’t power off automatically)
Keep the display power on for 72 hours, it can charge the battery.
8.9 Start password : Press POWER button get into the password setting menu. If
you had set Start input ON, you must input right password before power on,
password is accorded to your setting.
You need to input the right password before start with 30 seconds, display will power off
automatically if the password was wrong.

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Basic Setting
*Press DOWN button to move the red arrow to , press POWER button can show all
items of the Basic Setting.
8.10 Wheel : Press UP/DOWN can change the wheel setting, optional wheel diameter is
16/18/20/22/24/26/27/27.5/28/29 inch.
8.11 Battery : Press UP/DOWN will change battery voltage setting, optional value is
24V/36V/48V/UBE，UBE means user define value.
8.12 USB Port：press level, select presOFF/ON，Will be no Voltage/Current
output after switching off.
UP/DOWN

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8.13 Ligtht sensor：sensor item，press , enterLight
interface ，Press button select OFF/；into Light sensor
，pressselect Sensitivity
Select sensitivity of light sensation HI/MID/LO
8.14 Advance setting : Press POWER button can get into the advance setting menu,
default password is ‘1919’.
switch
Button
ON
UP/DOWN
UP/Down

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8.15 Speed limit : Press UP/DOWN will change speed limit, range 10km/h~45km/h. Default
value is 25km/h.
8.16 Current limit : Press UP/DOWN will change current limit, range 6A~50A. Default value
is 15A.
*Speed limit and current limit are restricted by controller and motor.
8.17 Poles in motor : Magnetic poles inside the motor, press UP/DOWN will change pole
number, range 1~6. Default value is 1.

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8.18 Start after poles : How many poles (speed sensor) need to be detected by controller
before starting motor. Default value is 3.
8.19 Clockwise start : This parameter represent speed sensor turn direction, default value
is Y (forward).
8.20 Throttle 6KM : this parameter can set the throttle function, N represent max speed, Y
represent 6Km.

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8.21 Throttle Level : This parameter is functional when Throttle 6KM set N, Press
UP/DOWN will change Y/N, N represent Throttle start max speed, Y represent
throttle’s speed is accorded to the assist level.
8.22 Start mode : Pow/ECO/STD(default) represent Power/ECO/Standard, Power mode
means use maximum current when speed up, ECO mode means use minimum
current.
*This function is optional, may not supported by each mode.
8.23 Assist levels : This parameter can customize assist levels, options are 3/5/9/UBE,
UBE represent factory default settings.

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8.24 Assist Setting : This parameter can customize assist ratio.
8.25 Factory setting : Press POWER button enter Restore Factory settings item, set YES
will restore all parameter to factory settings.
8.26 Information : Show information of the E-bike.

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8.27 Product info : Get into this item can show hardware version software version…
8.28 Battery info : Get into this item can show all information of battery, including Voltage,
Capacity, Cycle times, Health, Temperature of battery, Remaining Capacity, Full
Charge Capacity, Initial Capacity，Max Charge Times.
*These information needs to be supported by battery communication.

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8.29 . Self-Testing：Get into this item can Self-testing, and show testing information of the
BIKE, including Controller→ PAS sensor→ Speed sensor→ Throttle→ Motor hall
sensor→ Brake sensor. Follow the prompts requires the operator.
*-- This indicates ignore detection，NG test will not pass.

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8．Error Code define
850C can show warning message, icon shows on the screen, and show error code at
the bottom of the screen, error code from 01~25, definition see the table below.
Error Code
Error description
Handle
01
Communication Error
Check the cable connection
21
Current protection
Check controller.
22
Throttle error
Check turn to connect.
23
three-phase power error
Check three-phase power line connection
24
Hall error
Check the hall connection
25
Brake error
Check the brake connection.
26-99
Reserved
Please contact the manufacturer for error definitions
9．Assembly instructions
Please pay attention to the screw’s torque value, damaged caused by excessive torque
is not within the scope of the warranty.

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There are 2 directions for the clamp installation, forward or backward.
Clamps suit for 3 size of handlebar, 31.8mm, 25.4mm, 22.2mm, there are transfer rings for
25.4mm and 22.2mm, transfer ring must be assembled with the special directions, pay
attention to the green arrow below.
10．Connector descriptions
1、Red wire : Anode(24v/36v/48V)
2、Blue wire : Power cord to the controller
3、Black wire : GND