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SIYI D6 User Manual

SIYI D6 User Manual

Enterprise propulsion system
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D6 Enterprise Propulsion System User Manual v1.0
D6
ENTERPRISE
PROPULSION SYSTEM
USER MANUAL
V1.0
September 2024
1
2024 SIYI Technology Copyright

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Summary of Contents for SIYI D6

  • Page 1 D6 Enterprise Propulsion System User Manual v1.0 ENTERPRISE PROPULSION SYSTEM USER MANUAL V1.0 September 2024 2024 SIYI Technology Copyright...
  • Page 2 FOC algorithm control to improve the throttle response speed while making the system more efficient, the operation lower noise, and the throttle more linear. D6 propulsion system also has power-on low voltage, high voltage, op amp abnormality, MOS short circuit, and phase loss protection functions.
  • Page 3 D6 Enterprise Propulsion System User Manual v1.0 SIYI User Group - Facebook SIYI Official Website (https://siyi.biz/en) SIYI Official Store (https://shop.siyi.biz) SIYI YouTube Channel (https://www.youtube.com/c/SIYITech) SIYI Facebook Page (https://www.facebook.com/siyitechnology) 2024 SIYI Technology Copyright...
  • Page 4 D6 Enterprise Propulsion System User Manual v1.0 User Manual Update Log Version Date Updates 2024.9 Initial version. 2024 SIYI Technology Copyright...

  • Page 5: Table Of Contents

    D6 Enterprise Propulsion System User Manual v1.0 目录 READ TIPS ................................. 7 Icons ..................................7 Safety ..................................7 Storage / Carrying / Recycling ..........................8 1 INTRODUCTION ..............................9 1.1 Product Features ............................. 9 1.2 Product Overview ............................13 1.3 Technical Specification ..........................15 1.4 Performance Specifications .........................
  • Page 6 D6 Enterprise Propulsion System User Manual v1.0 3.5 Debug and Check ............................56 3.5.1 Throttle Channels ...........................56 3.5.2 Motor Orientation ............................57 3.5.3 Flight Controller Parameters ........................ 57 3.6 Installing Propellers ............................61 3.6.1 Matching Motor Orientation ........................61 3.6.2 Installation and Tightening ........................62 4 FLIGHT TEST ................................64...

  • Page 7: Read Tips

    SIYI Technology is not obliged to any of the damage, loss, or injury. It is prohibited to use SIYI products for military purpose. Users under 14 years’ old should follow an experienced trainer’s guide.

  • Page 8: Storage / Carrying / Recycling

    SIYI products should be placed in places which are too hot (above 60℃) or too cold (under -20℃). CAUTION SIYI products should not be placed in places under direct sunshine or too dusty or too wet. Carrying or transporting SIYI products should avoid vibration or shatter by which components may break.

  • Page 9: Introduction

    It also adopts nano-coating technology and provides IPX5 protection level. Motor The motor is SIYI strictly selected by craftmanship and materials, which comes with full CNC structure, imported bearings, imported permanent magnets, and high temperature resistant enameled wire. Strong thrust and good heat dissipation.
  • Page 10 Strong Thrust, Extraordinary Efficiency Straight & Foldable Propellers Equally Matched D6 enterprise propulsion system is compatible with both straight propellers and foldable propellers, considering both thrust performance and flight efficiency. PWM & CAN Dual Throttle Redundancy...
  • Page 11 D6 Enterprise Propulsion System User Manual v1.0 in real time. It supports reading data through the CAN bus, providing pilots and engineers with reliable and rich fault analysis basis, and improving diagnosis and maintenance efficiency. Complete ESC Protection Function Whether in the power-on self-test stage or the operation stage, a rich set of preset...
  • Page 12 The normal operating life of the bearings can exceed 1000 hours. Both Open-Source & Commercial Ecosystem Compatible SIYI Technology has been adhering to its fine traditions in the field of intelligent robots for many years, while adapting inclusive open-source systems and...

  • Page 13: Product Overview

    D6 Enterprise Propulsion System User Manual v1.0 1.2 Product Overview Propeller (Foldable) 2024 SIYI Technology Copyright...
  • Page 14 D6 Enterprise Propulsion System User Manual v1.0 Propeller (Straight) 2024 SIYI Technology Copyright...

  • Page 15: Technical Specification

    D6 Enterprise Propulsion System User Manual v1.0 1.3 Technical Specification Overall Max Thrust 6.5 kg / axis Recommended 2 to 2.5 kg / axis Take-off Weight Recommended 12 ~ 14S LiPo Battery Power Cable: 710 mm Cable Length Signal Cable: 780 mm...
  • Page 16 D6 Enterprise Propulsion System User Manual v1.0 Motor 130 KV Motor Size Φ67.7 * 23.1 mm Poles & Magnets 24N28P Product Weight 240 g Propeller (Straight) Diameter x Pitch 22 x 7.8 Inch Product Weight 35.7 g Propeller (Foldable) Diameter x Pitch...

  • Page 17: Performance Specifications

    D6 Enterprise Propulsion System User Manual v1.0 1.4 Performance Specifications D6 Foldable Propeller Performance 2024 SIYI Technology Copyright...
  • Page 18 D6 Enterprise Propulsion System User Manual v1.0 D6 Straight Propeller Performance 2024 SIYI Technology Copyright...

  • Page 19: Packing List

    D6 Enterprise Propulsion System User Manual v1.0 1.5 Packing List Motor Assembly (Excluding Propellers) 1 x D6 Industrial Propulsion System Assembly (CW or CCW) Straight Propeller 1 x D6 2278 Straight Propeller (CW or CCW) 1 x Propeller Spacer 4 x Hex Socket Head Cap Screw HM3*14...

  • Page 20: Protection Function, Indicator Definition, & Buzzer Definition

    D6 Enterprise Propulsion System User Manual v1.0 1.6 Protection Function, Indicator Definition, & Buzzer Definition SIYI propulsion system uses both indicators and buzzers to define different working states. Status Errors Buzzer Indicator Suggested Actions Yellow Blinks Check the power Overvoltage,...
  • Page 21 D6 Enterprise Propulsion System User Manual v1.0 are connected correctly, then try re- flashing the firmware Firmware upgrade in Firmware progress, returns to No Beep White Blinks Upgrading normal color after successful upgrade Mark Red, green, and blue are normal indicator colors. Users can define the colors or turn off indicator blinking.

  • Page 22: Prepare For Assembly

    Watch Tutorial Video SIYI D6 Enterprise Propulsion System User Tutorial Vol.1 - ASSEMBLY https://www.youtube.com/watch?v=Cdg3LkeN-eI&list=PLnwDdKcxuIbc5StgCD- xdx9GRcsUEuvWD&index=2 SIYI D6 Enterprise Propulsion System User Tutorial Vol.2 - ADJUST & CHECK PARAMETER https://www.youtube.com/watch?v=gYLqLQA97nQ&list=PLnwDdKcxuIbc5StgCD- xdx9GRcsUEuvWD&index=3 SIYI D6 Enterprise Propulsion System User Tutorial Vol.3 - FLIGHT TEST https://www.youtube.com/watch?v=2bfIGtdI_l8&list=PLnwDdKcxuIbc5StgCD-...
  • Page 23 D6 Enterprise Propulsion System User Manual v1.0 UPGRADE https://www.youtube.com/watch?v=SHv5EgqwnTE&list=PLnwDdKcxuIbc5StgCD- xdx9GRcsUEuvWD&index=6 2024 SIYI Technology Copyright...

  • Page 24: Solder The Power Connector

    D6 Enterprise Propulsion System User Manual v1.0 2.1 Solder the Power Connector Soldering the power connector is a necessary step to ensure that the propulsion system works properly. Tools Required:  Soldering Iron  Soldering Tin (enough)  Connectors (Amass XT60 or higher grade is recommended) Steps 1.
  • Page 25 D6 Enterprise Propulsion System User Manual v1.0 Mark Please ensure that the power wires are fully and securely soldered to the connector, with the solder joints being well-filled to avoid cold or weak soldering. This is crucial for maximizing flight safety.

  • Page 26: Configuration

    D6 Enterprise Propulsion System User Manual v1.0 2.2 Configuration The SIYI software allows users to customize the propulsion system's indicator colors, throttle ID, and CAN throttle settings. Tools Required  SIYI Software for Windows  SIYI CAN Link Module  Windows Device...
  • Page 27 1. Please refer to the diagram above to connect the propulsion system, the CAN Link module, and the Windows device. 2. Run the SIYI software and go to the ESC settings menu. 3. Select the corresponding COM port and device type (ESC), then click "Scan."...
  • Page 28 D6 Enterprise Propulsion System User Manual v1.0 4. If the propulsion system is recognized successfully, connection is established. Mark 2024 SIYI Technology Copyright...

  • Page 29: Indicator Colors

    D6 Enterprise Propulsion System User Manual v1.0 Before configuration, make sure the propulsion system is functioning properly and pay special attention to the CAN interface pin definitions to avoid incorrect connections. 2.2.1 Indicator Colors The indicator colors of the propulsion system are an important reference during LOS (Line of Sight) flight.
  • Page 30 D6 Enterprise Propulsion System User Manual v1.0 2. Set the indicator color for the selected ESC and save the settings. 3. If the propulsion system's indicator color changes accordingly, settings are successful. Mark Before configuring the ESC, please disconnect other serial port devices to avoid issues in recognizing the propulsion system.

  • Page 31: Can Id

    D6 Enterprise Propulsion System User Manual v1.0 2.2.2 CAN ID When using CAN throttle, it is necessary to set a CAN ID for the propulsion system. Mark CAN ID has been automatically assigned during production. So, it is not mandatory to configure the CAN ID every time.

  • Page 32: Can Throttle

    CAN throttle is digital throttle which helps the propulsion system function more precise and smoother. Mark D6 propulsion system is PWM throttle priority in default and will only use CAN throttle if PWM throttle is not available. If you require CAN throttle priority, please always contact SIYI support.

  • Page 33: Setting Can Throttle Through Mission Planner (Ardupilot)

    D6 Enterprise Propulsion System User Manual v1.0 ID, then save the settings. 2.3.2 Setting CAN Throttle through Mission Planner (ArduPilot) ArduPilot flight controllers support setting D6 propulsion system through the DroneCAN protocol. Steps 1. Run Mission Planner and locate the corresponding port in PC Device Manager.
  • Page 34 D6 Enterprise Propulsion System User Manual v1.0 3. Locate the CAN_P1_DRIVER by searching. 4. Set the value of CAN_P1_DRIVER to 1. 5. Set the value of CAN_D1_PROTOCOL to 1 and configure the CAN interface protocol to DroneCAN. 6. After successful setup, restart the flight controller. You should see additional parameters: CAN_P1_BITRATE and CAN_D1_UC_ESC_BM.
  • Page 35 D6 Enterprise Propulsion System User Manual v1.0 7. Configure CAN_P1_BITRATE to 1000000。 8. Select the CAN_D1_UC_ESC_BM options according to the number and IDs of the ESCs. The below picture shows the situation using 4 ESCs of which the IDs are assigned as 1, 2, 3, and 4.
  • Page 36 D6 Enterprise Propulsion System User Manual v1.0 2. For example, to motor 1, click "Test motor A." 2024 SIYI Technology Copyright...
  • Page 37 D6 Enterprise Propulsion System User Manual v1.0 3. In the status bar, under the current throttle action, you can see ESC 1’s  Voltage（esc1_volt）  Current（esc1_curr）  RPM（esc1_rpm）  Temperature（esc1_temp） data, etc. 2024 SIYI Technology Copyright...

  • Page 38: Setting Can Throttle Through Qgroundcontrol (Px4)

    D6 Enterprise Propulsion System User Manual v1.0 2.3.3 Setting CAN Throttle through QGroundControl (PX4) PX4 flight controllers support configuring D6 propulsion system through the UAVCAN protocol. Parameter Configuration Set UAVCAN_BITRATE to1000000. Set UAVCAN_ENABLE to Sensors and Actuators (ESCs) Automatic Config.
  • Page 39 D6 Enterprise Propulsion System User Manual v1.0 Set SYS_CTRL_ALLOC to “Enabled” to enable CAN dynamic ID allocation. PX4 dynamic CAN ID allocation requires an SD card. Without SD card, PX4 does not dynamically allocate CAN node IDs for CAN devices.
  • Page 40 D6 Enterprise Propulsion System User Manual v1.0 ESC Testing In “Actuators Outputs”, set the correspondence between the ESCs and motors, and configure the maximum and minimum throttle values. In “Geometry: Multirotor”, set the rotation orientation of the motors and their configuration relative to the center point.
  • Page 41 D6 Enterprise Propulsion System User Manual v1.0 Check Mavlink messages. The ESC_STATUS message includes information such as the ESC's RPM, voltage, and current. Select the option to plot the data to view the variation of these parameters over time. 2024 SIYI Technology Copyright...

  • Page 42: Start Assembly

    D6 Enterprise Propulsion System User Manual v1.0 3 START ASSEMBLY 2024 SIYI Technology Copyright...

  • Page 43: Motor Assembly

    When assembling the propulsion system, please carefully refer to the flight controller's user manual to correctly match each throttle ID with the corresponding motor orientation. For example, when using N7 flight controller (ArduPilot firmware) with D6 enterprise propulsion system: Quadcopter...
  • Page 44 Select the corresponding motor based on its orientation (CW or CCW). Mark If your SIYI propulsion system is to be used with a close-source commercial flight controller, please carefully check the flight controller user manual regarding throttle ID and motor orientation to avoid improper use and potential safety risks. If necessary, please always consult the manufacturer's technical support.

  • Page 45: Adjusting Arm Diameter (If Necessary)

    D6 propulsion system is 30mm arm diameter in default. If your arm diameter is less than 30 mm, you will need a reducing component between the arm tube and the D6 motor tube to make sure that the propulsion system can be assembled properly.
  • Page 46 D6 Enterprise Propulsion System User Manual v1.0 Install the Reducing Component Mark When installing the reducing component, it is recommended to use rivets to secure the arm to ensure the overall structural stability and safety. 2024 SIYI Technology Copyright...

  • Page 47: Assemble And Pre-Tightening The Motor To The Arm

    D6 Enterprise Propulsion System User Manual v1.0 3.1.3 Assemble and Pre-tightening the Motor to the Arm After matching the throttle ID and motor orientation, let’s assemble the motor onto the arm. During this step, the motor only needs to be pre-tightened, allowing a little space for post adjustments during calibration process.
  • Page 48 D6 Enterprise Propulsion System User Manual v1.0 2. Assemble the motor onto the arm. 3. Pass the propulsion system's wires through the arm tube. 2024 SIYI Technology Copyright...
  • Page 49 D6 Enterprise Propulsion System User Manual v1.0 2024 SIYI Technology Copyright...

  • Page 50: Balance The Motor

    D6 Enterprise Propulsion System User Manual v1.0 3.2 Balance the Motor Next, use a level to balance the motor assembly’s X-axis and Y-axis. 2024 SIYI Technology Copyright...

  • Page 51: Lock The Arm

    After assembling and balancing the motor, let’s lock the motor to the arm tube to ensure a secure installation. Mark D6 propulsion system comes with rivet holes. It’s up to customers whether rivets are required based on the actual situation to ensure overall structural stability and safety. 2024 SIYI Technology Copyright...

  • Page 52: Wiring And Routing

    D6 Enterprise Propulsion System User Manual v1.0 3.4 Wiring and Routing Now, let’s connect all propulsion system wires to their designated positions and arrange them appropriately. 3.4.1 PWM Throttle Wire Connect PWM signal wires to the corresponding pins of throttle output channel on the flight controller.

  • Page 53: Can Signal Wire (If Necessary)

    D6 Enterprise Propulsion System User Manual v1.0 3.4.2 CAN Signal Wire (if necessary) If using CAN throttle, connect the CAN signal wires to the CAN Hub module and integrate it into the flight controller's CAN port through the bus. 2024 SIYI Technology Copyright...

  • Page 54: Power Supply Wire

    D6 Enterprise Propulsion System User Manual v1.0 Mark If CAN throttle is not used, no additional configuration is required. 3.4.3 Power Supply Wire Connect the power wire to power supply on the power distribution board. 2024 SIYI Technology Copyright...
  • Page 55 D6 Enterprise Propulsion System User Manual v1.0 2024 SIYI Technology Copyright...

  • Page 56: Debug And Check

    D6 Enterprise Propulsion System User Manual v1.0 3.5 Debug and Check Before debugging, please strictly follow the below steps in order: 1. Ensure that the propulsion system wires are correctly connected to avoid safety risks from incorrect or missing connections.

  • Page 57: Motor Orientation

    D6 Enterprise Propulsion System User Manual v1.0 3.5.2 Motor Orientation Activate each motor individually through the GCS to verify if each motor of the propulsion system matches the default settings of flight controller. 3.5.3 Flight Controller Parameters Checking flight controller parameters is crucial for ensuring drone flight safety, enhancing flight stability and precision, performing troubleshooting, and evaluating and optimizing performance.
  • Page 58 D6 Enterprise Propulsion System User Manual v1.0 Flight Mode Configuration Gyroscope and Accelerometer Calibration Status 2024 SIYI Technology Copyright...
  • Page 59 D6 Enterprise Propulsion System User Manual v1.0 Voltage and Current Monitoring Settings Mark Based on actual drone flight performance and suggestions from GCS, PID parameters should be adjusted as needed. To verify the effects of these adjustments, it is recommended...
  • Page 60 D6 Enterprise Propulsion System User Manual v1.0 to conduct a few flight tests and carefully observe the drone’s stability and response speed. On this basis, fine-tune the parameters step by step until the drone achieves optimal flight performance. 2024 SIYI Technology Copyright...

  • Page 61: Installing Propellers

    D6 Enterprise Propulsion System User Manual v1.0 3.6 Installing Propellers Installing propellers is the final step before conducting flight tests. Before installing propellers, please ensure that all previous steps have been completed correctly to avoid test accidents that could result in personal injury or property loss.

  • Page 62: Installation And Tightening

    D6 Enterprise Propulsion System User Manual v1.0 3.6.2 Installation and Tightening Use M3*14 screws for straight propellers and align the propeller washers to the propeller holes and the motor holes. Only pre-tightening the screws in this step. 2024 SIYI Technology Copyright...
  • Page 63 D6 Enterprise Propulsion System User Manual v1.0 Use M3*6 screws for foldable propellers and align the propeller holes with the motor holes. Only pre-tightening the screws in this step. Mark Do not mix straight and foldable propellers on the same multirotor drone.

  • Page 64: Flight Test

    D6 Enterprise Propulsion System User Manual v1.0 4 FLIGHT TEST Before arming the drone to take off or during flight, it is necessary to conduct a series of basic checking on the drone to ensure flight safety, improve test efficiency and success rate.

  • Page 65: Pre-Flight Checking

    D6 Enterprise Propulsion System User Manual v1.0 4.1 Pre-flight Checking A pre-flight inspection should be conducted every time before powering on. 4.1.1 Check the Propellers Confirm that the propellers are installed correctly, firmly fastened, and without damage. If foldable propellers are used, it’s time to unfold the propellers to avoid unnecessary vibrations during takeoff.

  • Page 66: Check The Power Assembly

    D6 Enterprise Propulsion System User Manual v1.0 4.1.2 Check the Power Assembly Confirm that the motor is firmly installed, and the wiring is correct. And manually rotate the motor to check if there is any blockage or jamming. 2024 SIYI Technology Copyright...
  • Page 67 D6 Enterprise Propulsion System User Manual v1.0 2024 SIYI Technology Copyright...

  • Page 68: Start Flight Test

    D6 Enterprise Propulsion System User Manual v1.0 4.2 Start Flight Test 4.2.1 Ground Test Place the drone on a flat and open ground and power on the drone. Then arm the drone and slowly increase throttle, and carefully observe drone feedback to ensure that all motors and propellers are working properly.

  • Page 69: Basic Flight Movement Test

    D6 Enterprise Propulsion System User Manual v1.0 Hover the drone at height of one to two meters, observe its hovering stability, and test pan control (forward and backward, left and right) and spin control (yaw) in all orientation in a small scale to ensure that the drone can stably perform these actions.
  • Page 70 D6 Enterprise Propulsion System User Manual v1.0 2024 SIYI Technology Copyright...

  • Page 71: Post-Flight Inspection

    D6 Enterprise Propulsion System User Manual v1.0 4.3 Post-flight Inspection After each flight, it is recommended to conduct necessary inspections on the drone to detect flight abnormalities and potential safety hazards in a timely manner. 4.3.1 Check Propellers and Motors Check if the propellers are loose or damaged, and check if the motors are loose, blocked, or overheated.

  • Page 72: Troubleshooting

    D6 Enterprise Propulsion System User Manual v1.0 5 TROUBLESHOOTING SIYI software supports real-time view of propulsion system working status information such as vibration, temperature, current, and voltage which are very helpful for quick troubleshooting, improving maintenance efficiency, and ensuring operation safety.

  • Page 73: Real-Time Operating Data

    D6 Enterprise Propulsion System User Manual v1.0 5.1 Real-time Operating Data After selecting the corresponding ESC ID, the system will display a series of parameters, including throttle status, RPM, voltage, ESC temperature, ESC status, and throttle type. In addition, the corresponding waveform diagrams will be displayed in real time for monitoring and analysis.

  • Page 74: Historical Operating Data

    D6 Enterprise Propulsion System User Manual v1.0 5.2 Historical Operating Data Users can consult relevant information through the ESC ID. The front part represents the corresponding number of power-on times, and the rear part represents the file serial number. According to this naming rule, users can read the data content of the corresponding file.
  • Page 75 D6 Enterprise Propulsion System User Manual v1.0 2024 SIYI Technology Copyright...

  • Page 76: Fault Storage Function

    D6 Enterprise Propulsion System User Manual v1.0 5.3 Fault Storage Function Users need to select the corresponding ESC ID for viewing according to actual needs. When the user clicks the details option, the system will display the abnormal occurrence time of the file and specific abnormal point information.
  • Page 77 D6 Enterprise Propulsion System User Manual v1.0 2024 SIYI Technology Copyright...

  • Page 78: Firmware Upgrade

    D6 Enterprise Propulsion System User Manual v1.0 6 FIRMWARE UPGRADE 2024 SIYI Technology Copyright...

  • Page 79: Upgrade Through Siyi Software

    SIYI CAN Link Module  Windows device  Steps 1. Please refer to the above picture to connect the propulsion system, the SIYI CAN Link module, and the Windows device. 2. Run SIYI software and go to “ESC Settings”. 2024 SIYI Technology Copyright...
  • Page 80 D6 Enterprise Propulsion System User Manual v1.0 3. Select the corresponding COM port and device type (ESC), and then click "Scan". 2024 SIYI Technology Copyright...
  • Page 81 D6 Enterprise Propulsion System User Manual v1.0 4. If the propulsion system is recognized normally, the connection is successful. 5. Click “Upgrade” and select the firmware file. 2024 SIYI Technology Copyright...
  • Page 82 D6 Enterprise Propulsion System User Manual v1.0 6. Then click “OK” and wait for the update progress bar is completed. 2024 SIYI Technology Copyright...
  • Page 83 D6 Enterprise Propulsion System User Manual v1.0 7. Upgrade is successful. Mark Before firmware upgrade, please make sure that the propulsion system is working properly. And pay special attention to the pin definition of the CAN Link Module to avoid reverse insertion.
  • Page 84 D6 Enterprise Propulsion System User Manual v1.0 be a beep sound and the indicator will return to its original color simultaneously. 2024 SIYI Technology Copyright...

  • Page 85: Upgrade In Dronecan Protocol Through Mission Planner (Ardupilot)

    D6 Enterprise Propulsion System User Manual v1.0 6.2 Upgrade in DroneCAN Protocol through Mission Planner (ArduPilot) ArduPilot flight controller supports upgrading SIYI propulsion system firmware through DroneCAN protocol. Steps Run Mission Planner and find the corresponding port in the PC device manager.
  • Page 86 D6 Enterprise Propulsion System User Manual v1.0 Select the corresponding COM port and 115200 baud rate. In DroneCAN / UAVCAN column, click MAVlink-CAN1 to refresh the CAN device. The option "SIYI ESC" belongs to SIYI propulsion system ESC. 2024 SIYI Technology Copyright...
  • Page 87 D6 Enterprise Propulsion System User Manual v1.0 Find the “Update” option. Select the ESC firmware for upgrade. During the upgrade process, “Mode” is "SOFTWARE_UPDATE" and a progress bar is displayed. 2024 SIYI Technology Copyright...

  • Page 88: After-Sale Service

    D6 Enterprise Propulsion System User Manual v1.0 7 AFTER-SALE SERVICE If there were any questions or problems using SIYI Technology’s product, you can always try to send an email to SIYI Official A/S Center (support@siyi.biz) or consult your sales representative or dealer for answers or solutions.

  • Page 89: Repair Service

     Product Defect  Product Damage SIYI products under the two situations can be sent back to SIYI for repairing. Defect products with valid warranty can be repaired for free. Defect products without valid warranty or damaged products should be charged of repair fees after repairing.

  • Page 90: Warranty

    It is requested beyond seven (7) calendar days of receiving a product. A product sent to SIYI for Return & Refund Service does not include all original accessories, attachments or packaging, or any item is not in new or like-new condition, i.e., with cracks, dents, or scratches.

  • Page 91: 15-Day Replacement

    Damage is caused to the product by uncontrollable external factors, including fire, floods, high winds, or lightning strikes. A product is not delivered to SIYI within seven (7) calendar days after Return & Refund Service confirmation is sent from SIYI.
  • Page 92 Legal proof-of-purchase, receipts, or invoices are not provided, or are reasonably believed to have been forged or tampered with. A product sent to SIYI for replacement does not include all original accessories, attachments, and packaging, or contains items damaged by user error.

  • Page 93: 1-Year Warranty Repair

    D6 Enterprise Propulsion System User Manual v1.0 Received product has not been sent back to SIYI seven (7) calendar days after replacement confirmation from SIYI. Proof of damage during transit issued by the carrier cannot be provided. Other circumstances stated in this policy.
  • Page 94 D6 Enterprise Propulsion System User Manual v1.0 Damage caused by unauthorized modification, disassembly, or shell opening not in accordance with official instructions or manuals. Damage caused by improper installation, in correct use, or operation not in accordance with official instructions or manuals.
  • Page 95 D6 Enterprise Propulsion System User Manual v1.0 Products or parts with an altered identification label or from which the identification label has been removed. 2024 SIYI Technology Copyright...
  • Page 96 D6 Enterprise Propulsion System User Manual v1.0 SIYI Technology Business Inquiry: info@siyi.biz Phone: +86 400 838 2918 A/S Center: support@siyi.biz 2024 SIYI Technology Copyright...

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