Tower Hobbies KD58C User manual

Tower 14’ xplorer
!SUP Manual
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E L E C T R I C B I K E S
TOWER KD58C
ElectrIC BICYCLE
INTELLIGENT DISPLAY
MANUAL
1 YEAR LIMITED WARRANTY TOWERELECTRICBIKES.COM
Tower Electric Bikes
1253 Garnet Ave. San Diego, CA 92109
[phone]
@TOWER.LIFE

Contents:
Product Name and Model 2
Specifications 2
Appearance and Size 2
Function Summary and Button Definition 2
Function Summary 2
Button Definition 3
Assembly 3
Display Layout 3
General Operation 3
Display Layout 3
Turning the eBike On/Off 3
Display Interface 4
Using Push Assist Mode 4
Switching the Lighting On/Off 4
Pedal Assistance Level Selection 4
Power Indicator 5
Power Code Identification 5
General Settings 5
Trip Distance Reset 5
Unit Selection 5
Wheel Diameter Settings 6
Speed Limit Setting 6
Battery Power Bar Settings 6
Advanced Settings 6
Power Set 7
Current Setting 7
Assistance Number 7
Speed Sensor 7
Slow Start Up 7
Backlight Brightness 8
Start Up Password 8
Additional Settings Operations 8
Recover Default Settings 8
Appendix 9
Default Pedal Assistance Levels 9
Error Code Definitions 9
Default Power Bar Settings 9
Recommended Pedal Assist Power Table 10
Connection Layout 10
Line Sequence Table 10
1

Tower KD58C Electric Bicycle Intelligent Display
Specifications
● 24V/36V /48V Power Supply
● Rated current: 10mA
● The maximum working current: 30mA
● Off leakage current: <1uA
● The supply controller working current: 50mA
● Working temperature: -20 ~ 60 ℃
● Storage temperature: -30 ~ 70 ℃
Appearance and Size
Size: 56x46mm:
Function Summary and Button Definition
Function Summary:
This LCD controller is capable of the following functions:
● Smart battery indicator
● Assistance-level indication
● Speed indication (incl. running speed, max speed and average speed)
● Motor-output indicator
● Trip time indication
● Trip distance and total distance
● The push-assistance function
● Headlight power (On/Off)
● Error code indication
2

Button Definition:
There are three buttons ( M , + ,  - ) on the KD58C display that represent the following functions:
MODE, UP and DOWN.
Assembly
All Tower electric bicycles arrive with the controllers pre-mounted and installed. In the case that
the controller or display needs to be replaced, cut off the power before connecting or
disconnecting the controller.
Display Layout
General Operation
Turning the eBike On/Off:
● To turn on the eBike system, hold the MODE button for 2 s. Perform the same function
to turn the eBike system off.
● When the eBike system is turned off, the leakage current is less than 1 uA
● When parking the eBike for more than 10 minutes, the eBike system switches off
automatically.
Display Interface:
After turning on the eBike system, the display shows Running Speed. Press MODE to transition
through the available display interfaces:
● Running Speed (mi/h)
● Trip Distance (mi)
3

● Trip Time (hours)
● Average Speed (mi/h)
● Max Speed (mi/h)
Each interface will display for 2 seconds before automatically returning to the Running Speed
interface. On the condition that the speed is 0 km/h, Total Distance (ODO) will be added to the
circulation of available interfaces.
Using Push Assist Mode:
To access the push-assist mode, hold the DOWN button for 2s. The eBike will then move
forward at a uniform speed of 3.7mi/hr. The push-assistance funcion turns off as soon as the
DOWN button is released.
● Push-assistance function should only be used when pushing the eBike.
Switching the Lighting On/Off:
To switch on the eBike headlight, hold the UP button for 2s.
To switch off the eBike headlight, perform the same function. (hold the UP button for 2s)
Pedal Assistance Level Selection
Assistance levels indicate the output power of the motor. The default value is level 1.
The default power range is from Level 0 to Level 5. There is no output on Level 0, so the eBike
will ride like a normal bicycle. Level 1 is the minimum power. Level 5 is the maximum power.
Refer to Figure 1 at the end of this manual for a detailed pedal assist level table.
Pedal Assistance Level 4
4

Power Indicator:
The motor output power will be displayed on the display:
Motor Power Indicator Interface
Error Code Identification:
If there are errors regarding the electronic control system, an error code will appear
automatically. A list of error codes and definitions can be found in Figure 2 at the end of this
manual.
General Settings
After the eBike system is powered on, to access the general settings menu, hold both the UP
and DOWN buttons for 2s. Press the UP or DOWN button to select the desired setting, press
the MODE button to enter the setting configuration page. When accessing the settings menu,
the controller will ask for a password. THE DEFAULT PASSWORD IS 1 2 3 4.  This can be
entered by using the UP arrows to change each digit of the combination, followed by the MODE
button to move to the next digit of the combination.
Setting 1: Trip Distance Reset
Clear Trip is used to reset the trip distance. Press the UP or DOWN button to choose YES or
NO to clear the trip distance. The default value is NO. Press the MODE button to confirm the
selection, the display will then show OK and return to the general selection settings interface.
Setting 2: Unit Selection
The default unit for all Tower eBikes is “miles”. To change the units to “kilometers”, press UP or
DOWN until the desired setting is highlighted. Press MODE to store the selection and return to
the general selections interface.
5

Setting 3: Wheel Diameter Settings
The “Set WD” setting is pre-set to the correct value for this eBike (26”). This cannot be adjusted.
Setting 4: Speed Limit Settings
Select “Set LS” to change the speed limit settings. When running faster than the speed limit,
the eBike power system will switch off automatically. The speed limit range is 12km/h (7.5mph)
to 40km/h (25mph). The default value is 29km/h (18mph).
To change this setting, press UP or DOWN to increase or decrease until the desired
speed limit is displayed.
Press MODE for 2s to store the selection and return to the general selections interface.
Setting 5: Battery Power Bar Settings
Select “Set Voltage” to change the power battery display settings. For example, VOL 1 is the
voltage value at which the battery display will drop from two bars to one. Voltage thresholds for
each of the 5 battery bars must be entered one at a time.
To set the voltage level for the first battery bar display, press UP or DOWN
To store a changed setting and access the next bar’s threshold, press the MODE button.
After the voltage value is entered for the fifth bar, hold MODE for 2s to confirm and
return to the general settings interface.
See Figure 3 at the end of this manual for the default battery power bar settings.
Advanced Settings
The advanced settings are preset to recommended parameters, and shouldn’t need to be
changed. Advanced settings can be used to adjust pedal assist power settings, slow start
settings, backlight brightness and the start up password for the eBike.
To access the advanced settings, hold the UP and DOWN buttons for 2s to enter general
settings. Enter “1 2 3 4” when prompted for a password, then hold the UP and DOWN buttons
for 2 more seconds to enter the advanced settings interface. Press the UP or DOWN button to
transition through the available settings, then press the MODE button to adjust the selected
setting.
6

Advanced Setting 1: Power Set
The “Power Set” setting can be used to adjust the number of pedal assist levels. The
recommended setting is the default on all Tower eBikes (0-5). This setting features 6 levels,
with Level 0 being no pedal assist and Level 5 being the highest pedal assist ratio (96%).
To change the number of assistance levels, select “Power Set” and then press UP or
DOWN to select the pedal assist level range.
To store the changed setting and access the PAS ratio settings page, press MODE.
Press the UP or DOWN button to increase or decrease the pedal assist percentage for
each level. Note that this system supports up to 9 levels.
After the desired PAS ratio for each power level is inputed, press the MODE button to
confirm and return to the advanced settings interface.
Please see Figure 4 at the end of this manual for available pedal assist level ranges
Advanced Setting 2: Current Setting
The current setting is pre-set to the correct value for this eBike (20A). This cannot be adjusted.
Advanced Setting 3: Assistance Number
The current setting is pre-set to the correct value for this eBike (n-12). This cannot be adjusted.
Advanced Setting 4: Speed Sensor
The current setting is pre-set to the correct value for this eBike (n-01). This cannot be adjusted.
Advanced Setting 5: Slow Start Up
The “Slow Start” feature can be used to delay the pedal assist power. For example, a 3 sec
delay will result in the pedal assist system kicking in 3 seconds after the rider begins to pedal.
The default value is 0 and the delay can be increased up to 3 seconds.
To change the slow start up settings, press the UP or DOWN button to adjust the value.
Press the MODE button to save the selection and return to the advanced settings page.
7

Advanced Setting 6: Backlight Brightness
Select “Backlight Set” to adjust the brightness of the display. The range for this setting is 1-3,
with 3 being the brightest. The default value is 2.
To change the backlight brightness settings, press the UP or DOWN button to select the
desired value. Press the MODE button to save the selection and return to the advanced
settings page.
Advanced Setting 7: Start Up Password
The Start Up password is different than the password used to access the general settings
menu. When enabled, the start up password will be required each time the eBike is powered
on. Select “Password Set” to enable a start up password.
The default start up password is 1212
To change the start up password, select “enable” and press MODE to confirm the
selection.
Enter the new start up password (P3:XXXX), using the UP and DOWN buttons.
Press MODE to confirm the selection and return to the advanced settings menu.
Follow the same steps to disable the startup password. Note that the P2 password will
no longer be the default value of 1212.
Additional Settings Operations
● To exit the settings menu, hold the DOWN button for two seconds.
● If there are not any operations for one minute, the display will exit the settings menu
automatically.
Recover Default Settings
To reset the controller to default factory settings, press both the UP and MODE buttons for 2
seconds. This will open the dEF settings (Default Recovery). Press the UP or DOWN button to
select Y/N (yes/no). Hilight “Y”, then press the MODE button for two seconds to recover default
settings. Note that this action will also reset the startup password to the default (1212).
8

Appendix
Figure 1- Default Pedal Assistance Levels
Pedal Assist Level
Pedal Assist Power Ratio
0
0%
1
40%
2
52%
3
64%
4
75%
5
96%
Figure 2- Error Code Definitions
Error Code
Definition
21
Current Abnormality
22
Throttle Abnormality
23
Motor Abnormality
24
Motor Hall Abnormality
25
Brake Abnormality
30
Communication Abnormality
Figure 3- Default Power Bar Settings
Power Bar Level
Voltage
1
40.0V
2
44.5V
3
46.5V
4
47.5V
5 (Full)
49V
9

Figure 4- Recommended Pedal Assist Power Table
Figure 5- Connection Layout
Display-side Connector
Display-side Adapter
Switch Wiring
Figure 6- 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
10