Support
Q: Where can I download the product manual?
A: Visit the "Support/Downloads" section of our website and search for your product model.
Q: What is the warranty period for your products?
A: The standard warranty is 18 months from the date of shipment. Please refer to our warranty policy for details.
Q: How do I request repair and after-sales service?
A: Please submit a service request form via the "Support/ Contact Technical Support" page on our website.
Q: How can I purchase spare parts?
A: Please contact your original supplier or use the "Contact Us" form on our website for a direct quote.
Q: Do you provide product training?
A: Yes. We offer customized online and on-site training courses. Please email or call us for details.
Q: Where can I check my order status?
A: Please contact your sales representative or account manager directly for order inquiries.
Q: Is technical support free?
A: Yes, technical support for product-related issues is free during the warranty period.
Q: Do you provide on-site repair service?
A: Yes, we offer global on-site technical service. Costs and arrangements are determined case-by-case.
Q: How can I tell if my product is out of warranty?
A: Provide us with the product serial number, and our support team can check its status for you.
Q: How can I get the product certification certificates (CE, UL)?
A: Certificates for all products are available for download as PDFs in the "Support/Downloads" section.
Q: Can you recommend a system integrator in my area?
A: Yes. Please tell us your country and region, and we can recommend a certified local integration partner.
Q: What are your technical support hours?
A: We provide English email support 8 hours a day, 5 days a week. Some regions have local language and timezone support.
Q: Are software updates free?
A: Maintenance and minor version updates are free during the warranty period.
Q: How do I get urgent technical support?
A: Please call the hotline for your region listed on the "Contact Us" page of our website. Have your product model and serial number ready to expedite the process.
Q: Can I repair the Equipment myself?
A: We strongly discourage it. Inverters contain high-voltage capacitors, making self-repair dangerous and voiding the warranty. Always contact our qualified technicians.
Q: How can I check if my equipment is under warranty?
A: Please provide the serial number from the product nameplate. Our support team or authorized distributors can check the exact warranty status for you.
Technical
Q: The motor rotates in the wrong direction. What should I do?
A: Swap any two of the three motor output phases (U, V, W) on the inverter or reverse the direction command parameter.
Q: The VFD is interfering with sensors. How to fix it?
A: Use shielded cables with both ends grounded, or power the sensors with an isolated power supply.
Q: How can I view the history of past fault records?
A: Navigate to the "Fault History" or "History Alarm" parameter group in the menu.
Q: Do you support Modbus communication protocol?
A: Yes. Standard RTU mode. You need to set the station address, baud rate, data bit, and stop bit.
Q: What is the recommended minimum running frequency?
A: Generally not below 5Hz. If lower speeds are needed, ensure the motor has independent cooling.
Q: Can the VFD drive a single-phase motor?
A: No. Standard VFD are designed for three-phase induction motors only.
Q: How long should the deceleration time be?
A: Set it as short as possible without causing an overvoltage fault, based on the load inertia.
Q: What is DC braking and when is it used?
A: It injects DC current into the motor to bring it to a quick stop. Used to prevent coasting on high-inertia loads.
Q: What's the difference between 2-Wire and 3-Wire control?
A: It defines the control circuit type. Select the mode via a parameter and wire the start/stop signals accordingly.
Q: Why is there a deviation between the frequency command and the actual output frequency?
A: Check the frequency limits, slip compensation settings, and if the drive is in PID control mode.
Q: How should I set the initial start voltage for a soft starter?
A: Adjust based on load, typically between 30%-50% of the rated voltage, just enough to initiate motor rotation.
Q: What is the difference between Vector Control and V/F Control for a low voltage drive?
A: V/F Control maintains a constant voltage-to-frequency ratio, suitable for simple applications like pumps and fans. Vector Control provides superior torque response and speed accuracy at low speeds, ideal for demanding applications like hoists and extruders.
Q: My LV VFD is tripping on "Ground Fault". What should I check?
A: First, check the motor and output cable insulation for damage using a megohmmeter. Ensure the VFD's grounding connection is secure and that there is no moisture in the motor connection box.
Q: What is the maximum recommended cable length between a LV VFD and motor?
A: For unshielded cable, typically 50 meters. For shielded cable, 100 meters. Beyond this, use an output filter or dv/dt reactor to protect the motor from reflected wave voltage spikes.
Q: How do I select the correct braking resistor for my application?
A: Calculate the braking power and energy based on the load's inertia, stopping frequency, and deceleration time. The resistor's continuous and short-term power ratings must exceed these calculated values.
Q: Can I use a VFD with a motor that has an older, lower insulation class?
A: It is not recommended. The rapid voltage spikes (dv/dt) from a VFD's output can stress motor insulation. Use an inverter-duty motor or install a sine-wave filter to protect older motors.
Q: How often should I clean the cooling fans on my LV VFD?
A: In a clean environment, every 12-24 months. In dusty or dirty environments, inspect and clean every 3-6 months to prevent overheating.
Q: What is a "Flying Start" or "Spin Start" function?
A: This feature allows the VFD to synchronize its output to a motor that is already spinning (e.g., windmilling) and bring it under control without tripping.
Q: Do I need a special VFD for a permanent magnet (PM) motor?
A: Yes. PM motors require a specific control algorithm that understands the rotor's permanent magnetic field. Standard VFDs designed for induction motors will not operate a PM motor correctly.
Q: What is the difference between a "Sensorless Vector" and "Flux Vector" drive?
A: Sensorless Vector estimates motor speed and torque without a feedback encoder. Flux Vector Control requires an encoder for precise feedback, providing the highest possible performance for critical applications.