Hyena E-Bike System User manual

The information contained in this document is subject to change without notice.
If you nd any problems in the documentation, please report them to us in writing.
Original Instruction
Version 230314
Copyright © 2023 HYENA INC. All Right Reserved.
E-Bike System
Troubleshooting Guide

1. Introduction..................................................................... 1
1.1. Important Notices................................................... 1
1.2. Safety Instructions.................................................. 1
1.3. E-Bike Maintenance Precautions .......................... 2
2. Electrical Components................................................... 3
2.1. Electrical Component Overview............................. 3
3. E-Bike Maintenance........................................................ 4
3.1. General Information ............................................... 4
3.2. Cleaning ................................................................ 4
4. Frequently Asked Questions ......................................... 5
4.1. System Basic FAQS............................................... 5
4.2. Battery & Charging FAQS ...................................... 8
4.3. Remove or Change components FAQS................. 9
4.4. HST Connection FAQS ........................................ 10
4.5. Speed Limit FAQS.................................................11
4.6. Firmware Update FAQS....................................... 12
4.7. Miscellaneous FAQS............................................ 13
5. Error Code Overview Table.......................................... 14
6. Troubleshooting............................................................ 16
6.1. Code 16-17: Torque Sensor Signal Error ............. 16
6.2. Code 20-23: Front TPMS Error............................ 17
6.3. Code 24-27: IoT Function Error ........................... 18
6.4. Code 32-40: Motor Error ..................................... 19
6.5. Code 44-47: Rear TPMS Error ............................ 21
6.6. Code 48-49: Speed Sensor and Cadence Error .. 22
6.7. Code 50: Drivetrain Error (Chain) ........................ 23
6.8. Code 55: Brake Light Error ................................. 23
6.9. Code 56: Horn Error ............................................ 23
6.10. Code 59-62: Turn Signal Error ............................ 24
6.11. Code 63: Daytime Running Light Error ............... 24
6.12. Code 64-75: Battery Error ................................... 25
6.13. Code 80-94: Controller Error ............................... 27
6.14. Code 95-97: Throttle Error ................................. 30
6.15. Code 98-101: HMI Error ..................................... 31
6.16. Code 112: Front Light Error ................................ 31
6.17. Code 113: System Maintenance ........................ 32
6.18. Code 114: Bluetooth Error ................................... 32
6.19. Code 115: Brake Sensor Error ............................ 33
6.20. Code 116-117: Rear Light Error .......................... 33
7. Disposal ........................................................................ 34
TABLE OF CONTENTS

EN-1HYENA E-BIKE SYSTEMS
1. Introduction
When diagnosing the e-bike with Hyena Service Tool or Bike Tool System, the error
code shows on the application when a system error is detected. This guide instructs the
solution of di󰀨erent system defeats by error codes.
• This manual is intended primarily for the trained technician to install, disassemble, or
maintain the e-bike.
• Users who are not professionally trained for bicycle assembly should not attempt to
install, disassemble, or modify the components themselves.
• When maintaining the e-bike and its electronic components, always use this guide with
the product manuals or assembly manual, also read and observe the safety warnings
and directions contained in all the instructions.
• All Hyena e-system manuals and technical documents are accessible online at “www.
hyena-ebike.com”.
1.1. Important Notices
• Please carefully read all of the safety warnings and instructions throughout the manual.
Failure to follow these warnings and instructions could result in severe injury or death.
• Users not professionally trained in bicycle assembly should not attempt to install,
disassemble, or modify components.
► About Warnings Symbols
As you read this manual, you will see gray warning boxes like this:
⚠ WARNING
Text in a gray box with the safety alert symbol will warn you about a situation or behavior
that could cause severe injury or death.
⚠ CAUTION
Text in a gray box with the safety alert symbol and “CAUTION” heading will warn you
about a situation or behavior that could cause permanent product damage.
► About Images
The e-bike shown in this manual may di󰀨er visually from your Hyena equipped e-bike.
All information provided in this manual is still applicable to your e-bike.
1.2. Safety Instructions
Instructions Pertaining To A Risk Of Fire, Electric Shock, Or Injury To Persons
⚠ WARNING
When installing, disassembling, maintaining Hyena e-bike system
components, basic precautions should always be followed, including the following:
• Read all the instructions before any operation.
• Do NOT touch the cable terminal with bare hands.

EN-2HYENA E-BIKE SYSTEMS
• Do NOT turn on the e-bike system if any flexible power cord or output cable is
frayed, has worn insulation, or any other signs of damage.
• Always check the charger, cables, and power cord for any damage before charging
the battery.
• Only charge the battery using an original Hyena charger.
• Defective e-bike system parts may only be replaced with identical, original Hyena
parts.
• Do NOT modify the e-bike system or t any other equipment to increase the power
or maximum speed of your e-bike system.
• Any e-bike system parts are not intended to be operated at ambient temperatures
below -10°C (14°F) or above temperatures of 50°C (122°F).
• Do NOT immerse the e-bike or any e-bike component in water.
• Do NOT place the e-bike or any e-bike system component (like the battery) near
hot or ammable objects or materials.
• Do NOT charge the battery in places with high humidity or outdoors. Doing so may
result in electric shock.
⚠ WARNING
• When the assist system is switched on and an assist level is selected, the riding
support is activated as soon as you step onto the pedals or spin the crank. Even in
the workshop, you should be seated on the e-bike and engage at least one brake
before starting to pedal, or make sure the e-bike is properly secured on a stand
and the back wheel is suspended.
• With the e-bike system switched on, do NOT put one foot on a pedal and throw
another leg over the bicycle, as it could accelerate unexpectedly. Failure to follow
this warning may result in serious personal injury or even death.
1.3. E-Bike Maintenance Precautions
• Strictly follow all troubleshooting procedures in the order given. Done out of order, these
procedures can miss critical checks, you can possibly replace the incorrect assembly
or cause permanent product damage.
• Use the proper bicycle tools during the installation or removal process.
• Carefully installing and disassembling e-bike parts is necessary, do NOT strike the bike
frame or components with any tool, such as a hammer or wrenches.
• Use only genuine Hyena replacement parts. If you use anything other than genuine
Hyena replacement parts, you may compromise the safety, performance, or warranty of
your e-bike.

EN-3HYENA E-BIKE SYSTEMS
2. Electrical Components
2.1. Electrical Component Overview
• E-City Series
System Battery HMI Motor Sensor Charger
E-City BC-A320 LED Multi MRT-A250 ST-SQ-1 2A
E-City E BC-A320 LCD Compact EX MRT-A250 ST-SQ-1 2A
• E-Metro Series
System Battery HMI Motor Sensor Charger
E-Metro BS-A370 LED Multi MRT-A250 ST-SQ-1 2A/4A
E-Metro E BS-A370 LCD Compact EX MRT-A250 ST-SQ-1 2A/4A
E-Metro X BS-A500 LED Multi MRT-A250 ST-SQ-1 2A/4A
E-Metro XE BS-A500 LCD Compact EX MRT-A250 ST-SQ-1 2A/4A
• E-Urban Series
System Battery HMI Motor Sensor Charger
E-Urban BP-B250 LED Multi MRC-A250 ST-SQ-1 2A
E-Urban E BP-B250 LCD Compact EX MRC-A250 ST-SQ-1 2A
E-Urban T BP-B250 LED Chip MRC-A250 ST-SQ-1 2A
• E-Road Series
System Battery HMI Motor Sensor Charger
E-Road BP-B250 LED Chip MRC-E250 ST-SQ-2 2A
E-Road G BP-B250 LED Multi MRC-E250 ST-SQ-2 2A
• E-Trekking Series
System Battery HMI Motor Sensor Charger
E-Trekking BS-A370 LCD Compact EX MRC-A250 ST-SQ-1 2A
E-Trekking G BS-A370 LED Multi MRC-A250 ST-SQ-1 2A
E-Trekking X BS-A500 LCD Compact EX MRC-A250 ST-SQ-1 2A
E-Trekking XG BS-A500 LED Multi MRC-A250 ST-SQ-1 2A
E-Trekking Classic BP-A350 LCD Compact EX MRC-A250 ST-SQ-1 2A
E-Trekking Classic G BP-A350 LED Multi MRC-A250 ST-SQ-1 2A

EN-4HYENA E-BIKE SYSTEMS
3. E-Bike Maintenance
3.1. General Information
The e-bike should be checked for damage, missing or badly worn parts before each use.
If any part of the e-bike does not operate properly – discontinue use.
• Check the tightness of the screws/bolts before each use. Replace screws/bolts that are
damaged.
• Inspect the e-bike frequently. Make sure all parts are correctly assembled and adjusted.
• Immediately replace any damaged, missing, or badly worn parts.
• For the removable battery by turning the key, please remove the battery when
replacing a component or performing maintenance.
• The proper operation of the e-bike depends largely on its proper maintenance. Special
attention should be paid to:
- The correct torque of all screws and pins.
- Possible oil leaks from the brake system.
- Possible uid leaks from the battery.
- Possible smoke coming from the battery.
3.2. Cleaning
• For the removable battery by turning the key, please remove the battery when
cleaning the e-bike or the components of the e-bike system.
• Only clean the e-bike with a water-dampened soft cloth.
• Do NOT immerse the e-bike system or any individual e-bike component in water.
• Do NOT use any aggressive cleaning agents when cleaning.
• Do NOT use any sharp, angular, or metallic objects for cleaning.
• Never clean the components of the e-bike system with a hard water jet or a high-
pressure cleaner.
• After cleaning, wipe all surfaces and components to dry them.
• The system is designed to operate in rain and other adverse weather conditions.
Damage from pressure washing or additional heavy cleanings may void the Hyena
system warranty.

EN-5HYENA E-BIKE SYSTEMS
4. Frequently Asked Questions
When your e-bike has issues, you can nd answers to the following frequently asked
questions for basic solutions.
4.1. System Basic FAQS
Q1: Why can the system not be turned on?
Cause / Possibility Solution approach
Battery charge is low or
empty.
If the battery charge is low or if the battery is even empty,
please recharge the battery with a certied charger.
Battery is under sleep
(shutdown) mode.
The e-bike battery will automatically turn into sleep
(shutdown) mode if it has not been used for over 72 hours
for battery health and safety reasons. Please charge the
battery again to work normally.
The communication
between HMI, controller,
and battery has not
passed through.
- Check all external cable connections are correctly
connected.
- Replace the worn or damaged cable.
Cable connector pin is
damaged.
- Check if any corrosion/bend pin is visible on the connector.
- If necessary, replace a cable.
Q2: Why is there an abnormal sound at riding?
Cause / Possibility Solution approach
The drivetrain or the
motor is malfunctioning.
- Check the bicycle drivetrain and wheel to see if the noise
comes from them.
- Turn o󰀨 the power for manual pedaling.
- The maximum noise of the motor at spinning shall be
under 60dB. If the motor produces any higher noise or
irregular sound (clicking, vibration, etc.), replace the motor.
The motor is under
heavy load.
Are you riding on long slopes in the heat or putting an
overload of weight on the e-bike for a long time? The motor
can be louder under high load conditions.
Q3: Why do the lights do not illuminate?
Cause / Possibility Solution approach
The charge level of the
battery is too low.
When the battery charge is below 4%, the remaining amount
is reserved for powering the lights for up to two hours. At 0%
charge, the lights will not illuminate anymore.
The connectors of the
electric cables are not
connected correctly.
Check if all the connectors of the electric cables are
correctly connected.
The lights are
malfunctioning.
If all the connectors of the electric cables are correctly
connected, please replace the lights.

EN-6HYENA E-BIKE SYSTEMS
Q4: Why is the system on but without assistance power?
Cause / Possibility Solution approach
Charge level is low or
empty.
At 4% battery charge and below, the riding support will stop.
The remaining amount is reserved for powering the lights (if
equipped and powered by the assist system) for up to two
hours.
Riding support is not
turned on. You will only feel the riding support from level 1 to level 3.
You are not pedaling.
The e-bike only provides riding support power when you
keep pedaling. Riding support will be shut down immediately
when you stop pedaling.
System overheats.
- Are you riding on long slopes in the heat or putting an
overload weight on the e-bike for a long time? The e-bike
assist system may overheat.
- Please Turn OFF system, then take the e-bike to a well-
ventilated area and let it cool down for at least 10 minutes.
Speed limitation.
The e-bike drive output only supports a maximum speed
as demanded by local regulations; as soon as you have
reached this speed limit, the e-bike system suspends the
riding support, then automatically reactivates when your
speed is below the speed limit.
Cables are not connected
correctly.
If the system is on but without assistance power, please
check if the below two connectors connect properly:
- Motor: the motor connector is normally located at the
chainstay or seatstay. Check if the connector is plugged in
tight (refer to EN-20).
- Sensor: the sensor connector is normally located under the
bottom bracket. Check if the connector is plugged in tight
(refer to EN-16).
Cable connector pin
damaged.
- Check if any corrosion/bend pin is visible on the motor/
sensor connector.
- If necessary, replace a cable.
Torque sensor was
installed in the wrong
direction.
Try to pedal backward and see if there is any assistance
power. If there is assistance power, please reinstall the
torque sensor in the correct direction.
The torque sensor is
malfunctioning.
- Try the walk assist mode and see if the motor will spin. If
so, very likely the torque sensor signal cannot be detected.
- Ensure the connectors between the torque sensor and
controller are correctly connected and run the advanced
diagnosis tool on Hyena Service Tool.
The motor is
malfunctioning.
Try activate the walk assist function and see if the motor will
spin. If not, very likely the motor or controller needs to be
xed. Please take turns crosschecking both parts.

EN-7HYENA E-BIKE SYSTEMS
Q5: Why the system suddenly stops providing assistance?
Cause / Possibility Solution approach
Charge level is low or
empty.
At 4% battery charge and below, the riding support will
stop. The remaining amount is reserved for powering the
lights (if equipped and powered by the assist system) for up
to two hours.
System overheats.
- Are you riding on long slopes in the heat or putting an
overload weight on the e-bike for a long time? The e-bike
assist system may overheat.
- Please Turn OFF system, then take the e-bike to a well-
ventilated area and let it cool down for at least 10 minutes.
Speed limitation.
The e-bike drive output only supports a maximum speed
as demanded by local regulations; as soon as you have
reached this speed limit, the e-bike system suspends the
riding support, then automatically reactivates when your
speed is below the speed limit.
Cables are not connected
correctly.
If the system is on but without assistance power, please
check if the below two connectors connect properly:
- Motor: the motor connector is normally located at the
chainstay or seatstay. Check if the connector is plugged
tight (refer to EN-20).
- Sensor: the sensor connector is normally located under
the bottom bracket. Check if the connector is plugged tight
(refer to EN-16).
The torque sensor is
malfunctioning.
- Try the walk assist mode and see if the motor will spin. If
so, very likely the torque sensor signal cannot be detected.
- Ensure the connectors between the torque sensor and
controller are correctly connected and run the advanced
diagnosis tool on Hyena Service Tool.
The motor is
malfunctioning.
Try activate the walk assist function and see if the motor will
spin. If not, very likely the motor or controller needs to be
xed. Please take turns crosschecking both parts.

EN-8HYENA E-BIKE SYSTEMS
4.2. Battery & Charging FAQS
⚠ CAUTION
The e-bike battery cannot be used immediately after shipment; in order to ensure
that the battery has full and su󰀩cient power, please charge your battery fully before
using it for the rst time.
Q1: Why the battery quickly loses energy?
Cause / Possibility Solution approach
The battery may be near
the end of its service
life.
Connect the e-bike to Hyena Service Tool software to check
the battery's health. If the battery health status is below
average, it's recommended to replace the battery.
The ambient
temperature is too low.
The battery capacity may be a󰀨ected by ambient
temperature, especially in cold weather. The information of
the ambient temperature is listed in the user's manual.
High power consumption
circumstance.
Riding at a higher assistance level, continuously climbing
uphill, or higher carried weight will increase power
consumption. Connect the e-bike to Hyena Service Tool
software to check the frequency of each used assistance
level.
Q2: Why can the battery not be charged?
Cause / Possibility Solution approach
The connection
terminals of the charger
plug and charging
socket at the charge
port are not clean.
Please wipe the charger plug or the charging socket clean
with a dry cloth.
Charging adapter is not
connected correctly to
the battery charging
port.
- Securely connect the charging adapter to the battery
charging port and charge again.
- If the battery still does not charge, please contact your
manufacturer.
The charger is
malfuntion.
Check if the LED indicator on the charger illuminates or not.
Green light stays on: Standby mode / Fully charged
Red light stays on: Be charging
Q3: Why can the battery not be removed by inserting the key?
Cause / Possibility Solution approach
The locker is defective. Replace the battery mounting base.

EN-9HYENA E-BIKE SYSTEMS
Q4: Why does the LED indicator on the charger not illuminate?
Cause / Possibility Solution approach
The charger's indicator
is malfunctioning, but
the charging function
works normally.
- Turn on the e-bike system; if the battery charges correctly,
the charge indicators on the HMI will ash and show the
current charge status.
- If the LED indicator on the charger still does not illuminate,
it's recommended to replace the charger.
The power plug of
the charger is not
connected correctly.
- Disconnect and then reconnect the power plug of the
charger, and then repeat the charging operation.
- If the LED indicator on the charger still does not illuminate,
it's recommended to replace the charger.
4.3. Remove or Change components FAQS
Q1: Can I add or remove the throttle on my e-bike?
The drive system configuration is defined by the bicycle brands. If your system's
default setting does not support the throttle function. Any after-market conguration
changes are prohibited.
Some bike models have an optional setting for the throttle. You can connect your bike
to Hyena Service Tool and check the “Accessories” section to see if you have access
to add or remove the throttle.
You can contact your bike brand for more information if needed.
Q2: Can I add or remove the light on my e-bike?
The drive system configuration is defined by the bicycle brands. Any after-market
conguration changes are prohibited if the lights are mandatory parts, as this may
cause an error alarm.
Some bike models have an optional setting for the lights. You can connect your bike
to Hyena Service Tool and check the “Accessories” section to see if you have access
to add or remove the light.
You can contact your bike brand for more information if needed.
Q3: Can I change my HMI to another one?
The drive system configuration is defined by the bicycle brands. If your system's
default setting does not support multiple types of HMI compatibility. Any after-market
conguration changes are prohibited.
You can contact your bike brand for more information if needed.
Q4
: Can my battery be changed to a higher capacity?
The drive system configuration is defined by the bicycle brands. If your system's
default setting does not support multiple types of battery compatibility. Any after-
market conguration changes are prohibited.
You can contact your bike brand for more information if needed.
Q5: Can my bike add a Hyena range extender battery?
The range extenders only work with specic main batteries. If the default settings of
your system do not support a range extender, even if you have one, it will not be able
to connect and function with your e-bike.

EN-10HYENA E-BIKE SYSTEMS
4.4. HST Connection FAQS
Q1: Why my HST keeps showing "Searching the Dongle" and not moving pass that?
Cause / Possibility Solution approach
Your computer doesn't
have the driver to detect
the dongle.
Please download the dongle driver, or you can contact
Hyena Service Center if you can't nd the access. Please
download and install the latest version via the link below.
https://support.hyena-ebike.com/Dongle driver for Mac.zip
https://support.hyena-ebike.com/Dongle driver for Windows.zip
The dongle is
malfunctioning. Please try with another dongle.
Q2: Why can't my e-bike connect to Hyena Service Tool?
Cause / Possibility Solution approach
The bike was not
bundled properly at
the assembly factory.
Therefore, you will
see an “invalid bike id”
message on the HST.
Please contact the local service center for further
assistance.
Bluetooth signal is too
weak.
- Make sure you double-click the HMI power button only
when the light on dongle turns blue and starts blinking.
Once connected, you'll see a steady blue light.
- Turn o󰀨 the other BLT device and place your e-bike closer
to the dongle.
Hyena Service Tool is
not updated to the latest
version.
Update Hyena Service Tool to the latest version. You will
see an update notice pop up when the tool is executed.
Bluetooth module on the
HMI might malfunction.
Contact the local service center, and we'll determine if you
need to replace it with a new HMI.
Q3: I don't know the meaning of di󰀨erent colors light on dongle.
The dongle indicator will provide the following visual information about the connection:
LED status Function
White Get ready
Flashing blue Searching for Bluetooth connection.
Steady blue Connected to a bike.

EN-11HYENA E-BIKE SYSTEMS
4.5. Speed Limit FAQS
Q1: Why can't my e-bike reach the speed limit?
Cause / Possibility Solution approach
Your e-bike is not properly programmed
with the correct parameters when it
leaves the factory.
Contact the local service center to bundle
your e-bike.
Q2: Why can't my e-bike reach the speed limit after replacing the controller?
Cause / Possibility Solution approach
The corresponding parameter might not
been written into the new controller.
Hyena Service Tool needs to be performed
everytime after a part has been replaced, we
call it replacement process.
By executing the replacement process, we
can make sure the corresponding parameter
will be written for each e-bike model.
Q3: Why does my e-bike keep reaching the speed limit?
Cause / Possibility Solution approach
When the drive system is turned on,
it automatically detects all the sensor
readings. However, if you press the pedal
and turn the system on simultaneously, it
can cause abnormal initial sensing of the
torque sensor, resulting in this error.
Please move your feet o󰀨 the pedal and
restart the system.
Q4: Can the speed limit be adjusted?
The current speed limit complies with local regulations and cannot be changed.
However, we leave little room for riders to customize their riding feeling. You can
explore more on both Hyena Service Tool and Hyena Rider Assistant.

EN-12HYENA E-BIKE SYSTEMS
4.6. Firmware Update FAQS
Q1: Why is my e-bike not working after the update failed on Hyena Service Tool?
Cause / Possibility Solution approach
Your e-bike might be stuck
in the rmware update
process (bootloader mode*).
The system could go into
bootloader mode when the
rmware update failed.
Connect your e-bike to HST again, and it will
automatically execute the rescue process to nish the
update process. Bluetooth still works even when the
e-bike sticks in bootloader mode.
*Bootloader mode is a mode that allows access to the drive system's basic software and hardware
information and is used to install and update the OS.
Q2: Why is my e-bike not working after the update failed on Hyena Rider Assistant?
Cause / Possibility Solution approach
Your e-bike might stick in
the bootloader. The system
could go into bootloader
mode when the rmware
update failed.
Connect your e-bike to Hyena Rider Assistant and click
the try button to nish the update process. Bluetooth still
works even when the e-bike sticks in bootloader mode.
Q3: How can I tell my system is stuck in the bootloader?
Cause / Possibility Solution approach
HMI in bootloader
HMI has no function and cannot turn o󰀨 the system by
pressing the button. Please check your HMI:
“LCD Compact Ex”: You will see “UU” on the screen.
“LED Multi”: You will see white light illuminating on HMI.
Controller in bootloader
No assistant power. Please check your HMI:
“LCD Compact Ex”: You will see “error 84” on the screen,
indicating a communication error.
“LED Multi”: The red light is illuminating the HMI,
indicating a communication error.

EN-13HYENA E-BIKE SYSTEMS
4.7. Miscellaneous FAQS
Q1: Why do I see the red light or caution icon ash intermittently on the HMI?
Cause / Possibility Solution approach
A system error occurs,
and the bike needs to
be checked.
Your bike reaches a
specic mileage where it
should be serviced.
- Connect the bike to HST/ HRA.
- Check the error code.
- Consult the error code table and troubleshooting steps to
solve the issue.
Q2: The light ashes and goes out immediately when I turn on my bike. Is it normal?
It's normal. The front light will ash and go out immediately after you turn on the e-bike.
It's the default setting to test whether the light works or not.
Q3: Can I turn o󰀨 the maintenance reminder (error113) if I don't need it?
Cause / Possibility Solution approach
Error code 113 will
pop up when the
bike reaches the
maintenance mileage.
Yes, you can turn o󰀨 the reminder on Hyena Service Tool.
Q4: Why did the bike shut down in the middle of the ride?
Cause / Possibility Solution approach
The HMI, controller, and
battery communication
are not successfully
passing through.
-Check all external cable connections are correctly
connected.
- Replace the worn or damaged cable.
Q5: I saw a code on my HMI. What does it mean?
Cause / Possibility Solution approach
There is an error code,
and the bike needs to
be checked.
- Connect the bike to HST/ HRA.
- Check the error code.
- Consult the error code table and troubleshooting steps to
solve the issue.

EN-14HYENA E-BIKE SYSTEMS
5. Error Code Overview Table
If your e-bike is equipped with LCD Compact EX or when you use Hyena Rider Assistant
app, the error code shows on the screen when a system error is detected.
Code Category Error Description
16 Torque sensor Torque sensor voltage too high
17 Torque sensor Torque sensor voltage too low
20 Front TPMS Front tire pressure too high
21 Front TPMS Front tire pressure too high
22 Front TPMS Front TPMS battery capacity low
23 Front TPMS Front TPMS temperature too high
24 IoT Box Satellite positioning error
25 IoT Box SIM card error
26 IoT Box Database error
27 IoT Box Fail to connect server
32 Motor Motor hall all voltage too high
33 Motor Motor hall all voltage too low
34 Motor Motor signal error (U)
35 Motor Motor signal error (V)
36 Motor Motor signal error (W)
37 Motor Motor malfunction (U)
38 Motor Motor malfunction (V)
39 Motor Motor malfunction (W)
40 Motor Motor overheat
44 Rear TPMS Rear tire pressure too high
45 Rear TPMS Rear tire pressure too low
46 Rear TPMS Rear TPMS battery capacity low
47 Rear TPMS Rear TPMS temperature too high
48 Speed sensor Speed sensor error
49 Speed sensor Cadence sensor error
50 Chain Drivetrain error
55 Rear brake light Brake light malfunction
56 Horn Horn malfunction
59 Turn Lights Turn signal error (RR)
60 Turn Lights Turn signal error (RL)
61 Turn Lights Turn signal error (FR)
62 Turn Lights Turn signal error (FL)
63 Daytime running light Daytime running light error

EN-15HYENA E-BIKE SYSTEMS
Code Category Error Description
64 Battery Battery overvoltage
65 Battery Battery undervoltage
66 Battery Low capacity
67 Battery Empty capacity
68 Battery Charging temperature error
69 Battery Battery cell overvoltage
70 Battery Battery cell undervoltage
71 Battery Battery overcharge
72 Battery Battery short circuit
73 Battery Battery overdischarge
74 Battery Discharging temperature error
75 Battery Battery cell balancing error
80 Controller Controller overheat
81 Controller Battery communication error
82 Controller Locked rotor (pedal assist)
83 Controller Locked rotor (walk assist)
84 Controller Controller communication error
85 Controller Controller FET error (U)
86 Controller Controller FET error (U)
87 Controller Controller FET error (V)
88 Controller Controller FET error (V)
89 Controller Controller FET error (W)
90 Controller Controller FET error (W)
91 Controller Controller FET circuit error
92 Controller Controller FET overcurrent (Firmware)
93 Controller Controller FET overcurrent (Hareware)
94 Controller Controller protection unit error
95 Throttle Locked rotor (Throttle)
96 Throttle Throttle overvoltage
97 Throttle Throttle undervoltage
98 HMI Button communication fail
99 HMI HMI button communication error
100 HMI Display panel malfunction
101 HMI USB charge port error
112 Front light Front light malfunction
113 Maintenance Maintenance notication
114 Bluetooth Bluetooth error
115 Brake sensor Brake sensor error
116 Rear light Rear light malfunction
117 Light Light short circuit

EN-16HYENA E-BIKE SYSTEMS
6. Troubleshooting
6.1. Code 16-17: Torque Sensor Signal Error
Code 16-17 indicates the error of the torque sensor.
Code/ Fault Type/ Detail Remedy
16
Torque Sensor Signal Error
The detected torque sensor
output voltage is too high, the
sensor may be damaged.
1. Move your feet o󰀨 the pedal.
2. Long press the power button to turn o󰀨 the e-bike.
3. Find the connection cable between [Torque
Sensor] and [Controller], and check if the cable is
damaged.
4. Unplug the cable connector, and check if any
connector pin is bent or broken.
5. If the cable or connector of the component
is broken or damaged, please replace the
component.
6. If the connection is loose, plug the connector back
in tight carefully. When plugging the connectors,
ensure the arrow symbols on the two connectors
must be aligned.
7. If the cable and connector are in good condition,
please follow the next step.
8. Take turns replacing the [Torque Sensor]
and [Controller] with a new spare, after each
replacement, turn on the e-bike to check if the
error code still exists.
17
Torque Sensor Signal Error
The detected torque sensor
output voltage is too low, the
connection between sensor
and controller may be broken or
damaged.
⚠ CAUTION
When installing, disassembling, maintaining the torque sensor, do NOT use any tool
with strong magnetic during operation, this may lead to permanent damage to the
sensor or a󰀨ect the e-bike sensing signal accuracy.
NOTE: The cable connections of the sensor/ light/ HMI should be aligned with the arrow
and plugged in correctly as shown in the illustration.

EN-17HYENA E-BIKE SYSTEMS
6.2. Code 20-23: Front TPMS Error
Code 20-23 indicates the error of the front tire-pressure monitoring system; the TPMS
error codes only appear when equipped with the i-Tire TPMS device.
Code/ Fault Type/ Detail Remedy
20
Front Tire Pressure Too High
The detected front tire pressure is over
the preset maximum value, this error code
only appears when equipped with the
TPMS device.
1. Remove TPMS.
2. Release tire pressure down to standard
pressure value.
3. Install TPMS and use app to check error
code.
4. Replace TPMS if error code is remaining.
21
Front Tire Pressure Too Low
The detected front tire pressure is below
the preset minimum value, this error code
only appears when equipped with the
TPMS device.
1. Remove TPMS.
2. Pump tire pressure to standard pressure
value.
3. Install TPMS and use app to check error
code.
4. Replace TPMS if error code is remaining.
22
Front TPMS Battery Capacity Low
The front TPMS battery capacity is
low, this error code only appears when
equipped with the TPMS device.
1. Replace TPMS.
23
Front TPMS Temperature Too High
The front TPMS temperature is too
high, this error code only appears when
equipped with the TPMS device.
1. Move the e-bike to cooler ambient
temperature and wait for 10 minutes.
2. Check error code by app (Check if the
error code is remaining).
3. Replace TPMS if error code is remaining.