1. Įvadas
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. Produktas baigtasview
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.
Pagrindinės funkcijos:
- 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.
- Universalios programos: Suitable for constant pressure water supply and wind pressure constant pressure control, adaptable to various industrial needs.
- Kompaktiškas ir lengvas dizainas: Measures approximately 142 x 110 x 85mm and weighs 1.5kg, making it easy to install and transport.

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

2.2 pav.: galinis view of the frequency converter, highlighting the ventilation grilles and mounting points.
3. Specifikacijos
| Parametras | Vertė |
|---|---|
| Modelis | SKI780-2D2G-4 |
| Taikymo sritis | Universalus |
| Fazės numeris | Trijų fazių |
| Tiekimas ttage | Three-phase AC380V 50/60Hz |
| Išėjimas ttage | Three-phase AC380V |
| Adapted Motor Capacity | 2.2 kW |
| DC Supply Properties | ttage Tipas |
| Kontrolės metodas | Current Direction |
| Išėjimas ttage Reguliavimo režimas | PWM valdymas |
| Nominali srovė | 5.1A |
| Produkto dydis (apytiksliai) | 142 x 110 x 85mm / 5.6 x 4.3 x 3.3in |
| Panel Opening Size (Approx.) | 61 x 81 mm / 2.4 x 3.2 colio |
| Svoris (apytiksliai) | 1.5 kg / 3.3 svarai |
| Gamintojas | FUZHUI |
| Prekės modelio numeris | FUZHUI3ytmw2dggu |
4. Saugos informacija
ĮSPĖJIMAS: Elektros smūgio pavojus. Montavimą ir techninę priežiūrą turėtų atlikti tik kvalifikuoti darbuotojai.
- Prieš montuodami, jungdami laidus ar atlikdami techninę priežiūrą, visada atjunkite maitinimą.
- Ensure proper grounding of the unit and connected equipment.
- Nenaudokite dažnio keitiklio su pažeistais kabeliais arba jei korpusas yra atidarytas.
- Protect the unit from moisture, dust, and corrosive environments.
- Laikykitės visų vietinių ir nacionalinių elektros kodeksų.
- The VFD may have residual voltage even after power is disconnected. Wait at least 5 minutes after power-off before touching internal components.
5. Sąranka ir diegimas
5.1 Montavimas
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 Laidai
Refer to the terminal block diagrams for correct wiring connections. Ensure all connections are secure and properly insulated.

5.1 pav.: priekis view of the VFD, detailing the control panel and the main power and control terminal blocks.

5.2 pav.: Iš viršaus į apačią 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-).
- Maitinimo įvestis (R, S, T): Connect the three-phase AC380V 50/60Hz power supply to these terminals.
- Variklio išvestis (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.
- Valdymo terminalai: 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. Naudojimo instrukcijos
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 Valdymo skydelio funkcijos
- VYKDYTI: Paleidžia variklį.
- STOP/REST: Stops the motor or resets errors.
- PROG (Programa): Enters or exits parameter setting mode.
- M-FUN (Multi-Function): Accesses multi-function menus.
- SHIFT (<<): Shifts cursor position or changes display.
- Įveskite: Confirms parameter settings or enters sub-menus.
- Rodyklės aukštyn/žemyn: Navigate through menus or adjust parameter values.
6.2 Pagrindinė operacijų seka
- Maitinimas: Apply three-phase AC380V power to the VFD.
- Parametrų nustatymas: 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.
- Variklio užvedimas: Press the RUN button to start the motor. The display will show the output frequency or other selected operating parameters.
- Sureguliuokite greitį: Use the up/down arrow keys (if configured for local speed adjustment) or external control signals to change the motor speed.
- Variklio sustabdymas: 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. Priežiūra
Reguliarus techninis aptarnavimas užtikrina jūsų dažnio keitiklio ilgaamžiškumą ir patikimą veikimą.
- Valymas: 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.
- Patikra: Reguliariai tikrinkite visas laidų jungtis, ar jos tvirtos ir ar nėra susidėvėjimo ar pažeidimų. Eksploatacijos metu patikrinkite, ar nėra neįprastų garsų ar kvapų.
- Aplinkos sąlygos: Užtikrinkite, kad darbo aplinka išliktų nurodytuose temperatūros ir drėgmės diapazonuose.
- Kondensatoriaus tarnavimo laikas: 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.
8. Problemų sprendimas
This section provides general guidance for common issues. For specific error codes and advanced troubleshooting, consult the full user manual.
| Problema | Galima priežastis | Sprendimas |
|---|---|---|
| VFD neįsijungia | Nėra įėjimo galios; Perdegęs saugiklis; Vidinis gedimas | Check power supply; Inspect fuses; Contact technical support. |
| Variklis neveikia | 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. |
| Viršsrovės gedimas | Motor overload; Short circuit in motor or wiring; Rapid acceleration | Sumažinkite apkrovą; patikrinkite variklį ir laidus, ar nėra trumpųjų jungimų; padidinkite greitėjimo laiko parametrą. |
| Overvoltage kaltė | Rapid deceleration; High input voltage | Increase deceleration time parameter; Install braking resistor if needed; Verify input voltage. |
| Undervoltage kaltė | Žemos įvesties tūriotage; Power supply interruption | Patikrinkite įvesties tūrįtage; Check power supply stability. |
If the problem persists after attempting these solutions, please contact FUZHUI technical support.
9. Garantija ir palaikymas
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