1. Увод
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the FUZHUI SKI780-2D2G-4 Variable Frequency Drive (VFD) Frequency Converter. Please read this manual thoroughly before using the product to ensure proper functionality and to prevent potential hazards. This device is designed for controlling the speed of 3-phase AC motors in various industrial applications, including constant pressure water supply systems.
2. Производ је готовview
The FUZHUI SKI780-2D2G-4 is a compact and robust frequency converter designed for precise motor control. It features a built-in braking unit and advanced interference-reduction technology.
Кључне карактеристике:
- Built-In Braking Unit: Enables fast forward and reverse rotation switching with an external braking resistor, enhancing operational efficiency.
- Exceptional Immunity to Disturbance: Equipped with interference-reduction technology for stable performance in electromagnetically noisy environments.
- User-Friendly Functionality: Designed for ease of operation and wiring, facilitating quick setup and integration.
- Свестране апликације: Suitable for constant pressure water supply and wind pressure constant pressure control, adaptable to various industrial needs.
- Компактан и лаган дизајн: Measures approximately 142 x 110 x 85mm and weighs 1.5kg, making it easy to install and transport.

Слика 2.1: Под углом view of the FUZHUI SKI780-2D2G-4 VFD Frequency Converter, showing the control panel and terminal blocks.

Слика 2.2: Задња страна view of the frequency converter, highlighting the ventilation grilles and mounting points.
3. Спецификације
| Параметар | Валуе |
|---|---|
| Модел | SKI780-2D2G-4 |
| Опсег примене | Универсал |
| Број фазе | Тхрее Пхасе |
| Суппли Волtage | Three-phase AC380V 50/60Hz |
| Оутпут Волtage | Three-phase AC380V |
| Adapted Motor Capacity | 2.2кВ |
| DC Supply Properties | Волtagе Тип |
| Контролни метод | Current Direction |
| Оутпут Волtagе Регулациони режим | ПВМ контрола |
| Називна струја | 5.1А |
| Product Size (Approx.) | КСНУМКС к КСНУМКС к КСНУМКСмм / КСНУМКС к КСНУМКС к КСНУМКСин |
| Panel Opening Size (Approx.) | 61 x 81 мм / 2.4 x 3.2 инча |
| Тежина (приближно) | 1.5кг / 3.3 лб |
| Произвођач | FUZHUI |
| Број модела ставке | FUZHUI3ytmw2dggu |
4. Безбедносне информације
УПОЗОРЕЊЕ: Опасност од струјног удара. Инсталацију и одржавање треба да обавља само квалификовано особље.
- Увек искључите напајање пре инсталације, ожичења или одржавања.
- Ensure proper grounding of the unit and connected equipment.
- Do not operate the VFD with damaged cables or if the enclosure is open.
- Protect the unit from moisture, dust, and corrosive environments.
- Поштујте све локалне и националне електричне прописе.
- The VFD may have residual voltage even after power is disconnected. Wait at least 5 minutes after power-off before touching internal components.
5. Подешавање и инсталација
5.1 Монтажа
Mount the VFD in a clean, dry, and well-ventilated area. Ensure adequate clearance around the unit for heat dissipation. The compact size (142 x 110 x 85mm) allows for flexible installation.
5.2 Ожичење
Refer to the terminal block diagrams for correct wiring connections. Ensure all connections are secure and properly insulated.

Слика 5.1: Предња страна view of the VFD, detailing the control panel and the main power and control terminal blocks.

Слика 5.2: Одозго надоле view of the VFD's terminal blocks, showing input (R, S, T), output (U, V, W), braking (P+, PB), and control terminals (24V, 10V, AI1, GND, DI1-DI5, TA, TB, TC, AO1, FM, A+, B-).
- Улазна снага (R, S, T): Connect the three-phase AC380V 50/60Hz power supply to these terminals.
- Излаз мотора (U, V, W): Connect the 3-phase motor to these terminals.
- Braking Resistor (P+, PB): Connect an external braking resistor here if fast deceleration or frequent stopping is required.
- Контролни терминали: These include 24V and 10V auxiliary power, analog inputs (AI1, AO1), digital inputs (DI1-DI5), relay outputs (TA, TB, TC), and communication interfaces (FM, A+, B-). Refer to the detailed wiring diagram in the included user manual for specific connections based on your application.
5.3 Panel Compatibility Note
IMPORTANT: This product is an unused inverter and is designed to be used only with an unused panel. If your existing panel is an older model, it may not be compatible with this product. Please refer to the provided images or the full user manual to distinguish between old and new panel models for compatibility.
6. Упутство за употребу
The VFD features a user-friendly control panel for setting parameters and operating the motor.

Figure 6.1: Close-up of the VFD control panel, showing buttons for RUN, STOP/REST, PROG, M-FUN, SHIFT, ENTER, and arrow keys.
6.1 Функције контролне табле
- ТРЦАТИ: Покреће мотор.
- STOP/REST: Stops the motor or resets errors.
- ПРОГ (Програм): Enters or exits parameter setting mode.
- M-FUN (Multi-Function): Accesses multi-function menus.
- SHIFT (<<): Shifts cursor position or changes display.
- ЕНТЕР: Confirms parameter settings or enters sub-menus.
- Стрелице горе/доле: Navigate through menus or adjust parameter values.
6.2 Основни редослед операција
- Укључено: Apply three-phase AC380V power to the VFD.
- Подешавање параметара: Use the PROG button to enter parameter setting mode. Adjust necessary parameters such as motor frequency, acceleration/deceleration times, and control mode (Current Direction, PWM Control) using the arrow keys and ENTER button.
- Покрените мотор: Press the RUN button to start the motor. The display will show the output frequency or other selected operating parameters.
- Подесите брзину: Use the up/down arrow keys (if configured for local speed adjustment) or external control signals to change the motor speed.
- Заустави мотор: Press the STOP/REST button to stop the motor.
For detailed parameter descriptions and advanced functions, refer to the comprehensive user manual included with your product.
7. Одржавање
Regular maintenance ensures the longevity and reliable operation of your VFD.
- Чишћење: Periodically clean the VFD's exterior and ventilation grilles to prevent dust accumulation, which can impede cooling. Use a soft, dry cloth. Do not use liquid cleaners.
- инспекција: Редовно проверавајте све спојеве ожичења да ли су чврсто затегнути и да ли постоје знаци хабања или оштећења. Проверите да ли се током рада чују необични звуци или мириси.
- Услови животне средине: Уверите се да радно окружење остаје у прописаним опсезима температуре и влажности.
- Век трајања кондензатора: Electrolytic capacitors have a finite lifespan. If the VFD is in continuous operation for many years, consider professional inspection or replacement of capacitors.
Always disconnect power and wait for the discharge period before performing any maintenance.
КСНУМКС. Решавање проблема
This section provides general guidance for common issues. For specific error codes and advanced troubleshooting, consult the full user manual.
| Проблем | Могући узрок | Решење |
|---|---|---|
| VFD се не укључује | Нема улазног напајања; Прегорели осигурач; Унутрашња грешка | Check power supply; Inspect fuses; Contact technical support. |
| Мотор не ради | Incorrect wiring; Parameter settings incorrect; Overload; Emergency stop active | Verify motor wiring; Check parameter settings (e.g., frequency, control mode); Reduce load; Reset emergency stop. |
| Прекорачење струје | Motor overload; Short circuit in motor or wiring; Rapid acceleration | Reduce load; Check motor and wiring for shorts; Increase acceleration time parameter. |
| Оверволtagе фаулт | Брзо успоравање; Висока улазна јачина звукаtage | Increase deceleration time parameter; Install braking resistor if needed; Verify input voltage. |
| Ундерволtagе фаулт | Ниска улазна волtage; Power supply interruption | Провери унос волtage; Check power supply stability. |
If the problem persists after attempting these solutions, please contact FUZHUI technical support.
9. Гаранција и подршка
Specific warranty details for the FUZHUI SKI780-2D2G-4 Frequency Converter are not provided in this document. Please refer to the product packaging, purchase documentation, or contact your vendor for warranty information.
For technical support or inquiries, please visit the official FUZHUI store or contact their customer service department.
FUZHUI Store: https://www.amazon.com/stores/FUZHUI/page/E72029D9-145D-4226-96C5-6B17B08C907A