1. Introduzione
The AT1-4000X Variable Frequency Drive (VFD) is designed to provide precise speed control for 3-phase 4kW AC motors, operating from a single-phase 220V AC input. This VFD utilizes a unique control method to achieve high torque, high accuracy, and a wide speed regulating range, ensuring high performance in various applications.
E caratteristiche chjave includenu:
- Excellent anti-trip performance and adaptability to challenging power conditions, temperature fluctuations, humidity, and dust interference, significantly enhancing stability.
- Optimized PWM control technology and electromagnetic compatibility for low noise and reduced electromagnetic interference.
- User-friendly design for easy operation and wiring.
- Fast start and stop response with substantial torque at low speeds.
2. Precauzioni di sicurità
Failure to follow these instructions may result in death, serious injury, or significant property loss.
- Assicuratevi sempre chì l'alimentazione sia scollegata prima di fà qualsiasi cablaggio o manutenzione.
- Never connect the U/V/W output terminals to the AC power supply. Doing so will cause severe damage to the inverter.
- Do not install the inverter in environments with flammable or explosive gases, as this poses a risk of explosion.
- The ground terminal (GND) of the inverter must be properly and securely grounded.
- Only qualified professionals should perform internal wiring or open the inverter's casing due to the presence of high voltage.

3. Produttu Finituview
The AT1-4000X VFD features a clear digital display and an intuitive control panel for easy monitoring and adjustment of motor parameters. The unit is designed for efficient heat dissipation with integrated cooling fins and fans.
3.1 Pannellu di cuntrollu
U pannellu frontale include:
- Display Digitale: Shows operational parameters such as frequency (Hz), forward/reverse status (FWD/REV), and revolutions per minute (r/min).
- Indicatori: Power, Hz, FWD, REV, r/min.
- Bottoni:
DISP: Display mode selection.PROG: Program mode entry/exit.FUNC/DATA: Function/Data entry.FWD/REV: Forward/Reverse direction control.▲(Up Arrow): Increase value or navigate menus.▼(Down Arrow): Decrease value or navigate menus.RUN: Start motor operation.STOP/RESET: Stop motor operation or reset errors.
- Manopola rotativa: Per una regulazione fina di a frequenza o di i valori di i parametri.
3.2 Terminali
The VFD is equipped with clearly labeled terminals for power input and motor output.

4. Specificazioni
| Feature | Specificazione |
|---|---|
| Mudellu | AT1-4000X |
| Valutatu Voltage (entrée) | AC 220V (Single Phase) |
| Suitable Motor Power | 4 kW |
| Metudu di cuntrollu | V/F Open Loop |
| Uscita Voltage Adjustable Method | Cuntrollu PWM |
| Corrente nominale di output | 20A |
| Maximum Output Frequency Range | 0 - 400 Hz |
| Tipu | Inverter Motor Drive |
| Origine | Cina continentale |
| Dimensioni di u pacchettu (L x W x H) | 23 cm x 23 cm x 16 cm |
| Pesu di u pacchettu | 1.498 kg |
5. Setup
Before proceeding with installation and wiring, ensure all safety precautions are understood and followed. Installation should be performed by qualified personnel.
5.1 Ambiente di stallazione
- Install the VFD in a clean, dry, and well-ventilated area.
- Avoid direct sunlight, high temperatures, excessive humidity, and dusty environments.
- Ensure there is sufficient space around the unit for proper heat dissipation.
- Ùn installate micca vicinu à materiali inflammabili o esplosivi.
5.2 Istruzzioni di cablaggio
The VFD is designed for simple wiring. Always ensure the power supply is OFF before connecting any wires. Connect wires after removing the terminal screws.

| Terminal | Funzione | Descrizzione |
|---|---|---|
| L, N | Ingressu AC 220V | Connect to single-phase AC 220V power supply. |
| U, V, W | 3-Phase AC Motor Output | Connect to the three-phase AC motor terminals. |
| GND | Terra | Connect to a reliable earth ground. |
6. Operating Instructions
Once the VFD is correctly installed and wired, you can begin operation. Familiarize yourself with the control panel functions.
6.1 Funzionamentu di basa
- Power On: Ensure all connections are secure, then apply single-phase 220V AC power to the L and N terminals. The VFD display should illuminate.
- Accensione di u mutore: Press u
RUNbutton to start the motor. The FWD or REV indicator will light up depending on the current direction setting. - Adjust Frequency/Speed: Use the rotary knob to adjust the output frequency, which in turn controls the motor speed. The display will show the current frequency (Hz) or RPM (r/min).
- Cambia direzzione: Press u
FWD/REVbutton to toggle the motor's rotation direction. - Ferma u mutore: Press u
STOP/RESETbuttone per fermà u mutore.
6.2 Parameter Programming
U PROG è FUNC/DATA buttons, along with the arrow keys (▲, ▼), are used to access and modify various operating parameters. Refer to the detailed programming manual (if available) for specific parameter settings relevant to your application.
- Press
PROGto enter or exit programming mode. - Aduprà
▲è▼to navigate through parameter groups or individual parameters. - Press
FUNC/DATAto select a parameter for editing or to confirm a value. - Use the rotary knob or arrow keys to change the parameter value.
- Press
FUNC/DATAtorna per salvà u novu valore.
7. Mantenimentu
Regular maintenance helps ensure the longevity and reliable operation of your VFD.
- Pulizia: Keep the VFD clean and free from dust and debris. Use a soft, dry cloth for cleaning. Do not use liquid cleaners.
- Ventilazione: Ensure that the cooling fans and ventilation openings are not obstructed to prevent overheating.
- Ispezione: Periodically inspect all wiring connections for tightness and signs of wear or damage.
- Serviziu prufessiunale: Due to high internal voltages, any internal inspection or repair should only be performed by qualified service personnel. Do not attempt to open the VFD casintè stessu.
8. Risoluzione di prublemi
Questa sezione furnisce una guida generale per i prublemi cumuni. Per i prublemi cumplessi, cuntattate l'assistenza tecnica.
| Prublemu | Causa Possibile | Soluzione |
|---|---|---|
| U VFD ùn s'accende micca | No input power; Incorrect wiring | Check power supply and input wiring (L, N). |
| U mutore ùn viaghja micca | Motor wiring incorrect; VFD in STOP mode; Parameter error | Verify motor wiring (U, V, W); Press RUN; Check programmed parameters. |
| A velocità di u mutore hè instabile | Incorrect V/F settings; Motor load fluctuations | Adjust V/F curve parameters; Ensure motor is suitable for load. |
| Errore di overload | Motor overloaded; Incorrect overload protection setting | Reduce motor load; Check and adjust overload protection parameters. |
If an error occurs, the VFD display may show an error code. Press the STOP/RESET button to clear the error after addressing the cause.
9. Cunsiglii d'utilizatori
- For optimal performance, ensure the VFD is matched correctly to your motor's power rating (e.g., 4kW motor for this 4kW VFD).
- When adjusting frequency, make gradual changes to avoid sudden motor stress.
- Always ensure proper grounding to prevent electrical hazards and ensure stable operation.
- Keep the VFD's ventilation clear to prevent overheating, especially during continuous operation.
10. Garanzia è Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided at the point of purchase or contact the seller directly. Keep your purchase records handy when seeking support.





