1. Ifihan
This manual provides essential information for the safe and efficient operation of the Jectse AT904-7.5KW Variable Frequency Drive (VFD). This device is designed to control the speed of three-phase AC motors by varying the frequency and voltage of the power supplied to the motor. Please read this manual thoroughly before installation, operation, or maintenance to ensure proper use and prevent potential hazards.
2. Alaye Aabo
WARNING: Improper installation or operation can lead to serious injury or death. Only qualified personnel should install, operate, and maintain this equipment.
- Always disconnect power before performing any wiring, maintenance, or inspection.
- Rii daju didasilẹ to dara ti VFD ati mọto naa.
- Do not touch electrical components immediately after power-off; wait at least 10 minutes for capacitors to discharge.
- Dáàbò bo VFD kúrò lọ́wọ́ ọrinrin, eruku, àti àwọn afẹ́fẹ́ oníbàjẹ́.
- Daju pe awọn input voltage matches the VFD's specifications.
- Do not connect the VFD output directly to a single-phase motor or a power grid.
3. Ọja Ipariview
The Jectse AT904-7.5KW VFD is a robust and reliable frequency converter designed for various industrial applications requiring precise motor speed control. It features a durable ABS plastic shell and a user-friendly control panel.


Awọn ẹya pataki:
- Iṣagbewọle/Ijade: Single-phase 220V AC input, three-phase 0-380V AC output.
- Ibamu mọto: Suitable for 7.5KW (10HP) three-phase motors.
- Iduroṣinṣin: Integrated filter and V/F open-loop control for stable performance.
- Aabo: Anti-trigger design for resilience against power grid interference, temperature fluctuations, and dust.
- Iṣe: Delivers high torque, high accuracy, and wide speed regulation range.
- Awọn ohun elo: Ideal for fans, pumps, air compressors, and other motor-driven equipment.
4. Awọn pato
| Sipesifikesonu | Iye |
|---|---|
| Ọja Iru | Igbohunsafẹfẹ Converter |
| Awoṣe | AT904-7.5KW |
| Iṣagbewọle Voltage | Single Phase 220V AC 50/60Hz |
| O wujade Voltage | Three Phase 0-380V AC 0-400Hz |
| O pọju Ijade Lọwọlọwọ | 40A |
| Suitable Motor Power | 7.5KW (10HP) |
| Àlẹmọ | Ajọ-itumọ ti |
| Ipo Iṣakoso | V/F Open Loop |
| O wujade Voltage Regulation Mode | PWM Iṣakoso |
| Ohun elo Irisi | ABS ṣiṣu ikarahun |
| Ìwọ̀n Ọjà (Fún.) | 25 × 18 × 16.5 cm / 9.8 × 7.1 × 6.5 inches |
| Iwọn Nkan | 4.13 kg |
| Iṣẹ ṣiṣe | Ṣiṣe giga |
| Iwajade Waveform | Wave Sine Sure |
| Igbohunsafẹfẹ | 60 Hz |
| Nọmba apakan | Jectsepsctoya7hk5178 |
5. Eto
Careful installation is crucial for the performance and safety of the VFD. Ensure all safety precautions are followed.
5.1 Unpacking ati ayewo
- Unpack the VFD and inspect it for any physical damage during transit.
- Verify that all components listed in the package contents are present.
5.2 Iṣagbesori
- Mount the VFD vertically on a stable, non-flammable surface.
- Ensure adequate ventilation space around the unit (minimum 10 cm on all sides) to prevent overheating.
- Avoid mounting in direct sunlight, high humidity, or dusty environments.
5.3 Onirin
Refer to the detailed wiring diagrams provided in the included user manual for specific connection points. The following are general guidelines:
- Iṣagbewọle agbara: Connect the single-phase 220V AC power supply to the designated input terminals (typically L1, L2).
- Iṣajade mọto: Connect the three-phase 380V motor to the output terminals (typically U, V, W). Ensure the motor is rated for 380V and has a power rating less than or equal to 7.5KW.
- Ilẹ: Connect the ground terminal of the VFD to a reliable earth ground.
- Asopọmọra Iṣakoso: If external control (e.g., potentiometer, external switches) is used, connect according to the manual's control terminal diagrams.


6. Awọn ilana Iṣiṣẹ
The VFD allows for precise control over motor speed and direction. Familiarize yourself with the control panel before operation.


6.1 Iṣakoso Panel Awọn iṣẹ

- Bọtini RUN: Ti bẹrẹ iṣẹ-ṣiṣe mọto.
- Bọtini Duro: Idaduro motor iṣẹ.
- JOG Button: For momentary or step-by-step operation.
- Bọ́tìnì PRG: Enters programming mode to adjust parameters.
- ENT Button: Confirms selections or parameter changes.
- Awọn itọka oke/isalẹ: Adjust frequency, speed, or navigate menu options.
- Kokoro Rotari: Provides fine adjustment for frequency or other parameters.
6.2 Ipilẹ isẹ
- Agbara Tan: Ensure all wiring is correct and secure, then apply power to the VFD.
- Iṣeto paramita: If necessary, enter programming mode (PRG) to set motor parameters (e.g., rated frequency, maximum frequency, acceleration/deceleration times) according to your motor and application requirements. Refer to the detailed parameter list in the full user manual.
- Ibẹrẹ Motor: Tẹ awọn RUN button to start the motor.
- Ṣatunṣe Iyara: Use the Up/Down arrows or the rotary knob to adjust the motor speed (frequency).
- Mọto Duro: Tẹ awọn DURO bọtini lati da awọn motor.
- Yiyi pada: The VFD supports forward and reverse rotation. Specific instructions for changing direction are typically found in the parameter settings or via dedicated control terminals, as detailed in the comprehensive manual.
7. Itọju
Itọju deedee n ṣe idaniloju gigun ati iṣẹ igbẹkẹle ti VFD rẹ.
- Ninu: Periodically clean the VFD's exterior and cooling fins to prevent dust accumulation, which can hinder heat dissipation. Use a soft, dry cloth. Do not use liquid cleaners.
- Ayewo Olufẹ: Check the cooling fan for proper operation and ensure it is free from obstructions.
- Titọpinpin: Periodically check all wiring terminals for tightness. Loose connections can cause overheating and malfunction.
- Ṣayẹwo Ayika: Rii daju pe agbegbe iṣẹ wa laarin iwọn otutu pato ati awọn sakani ọriniinitutu.

8. Laasigbotitusita
This section provides basic troubleshooting steps for common issues. For complex problems, consult a qualified technician or contact customer support.
| Isoro | Owun to le Fa | Ojutu |
|---|---|---|
| VFD ko ni agbara lori | No input power; incorrect wiring | Check power supply and input wiring. Ensure circuit breaker is on. |
| Mọto ko bẹrẹ | Incorrect motor wiring; VFD fault; parameter settings incorrect | Verify motor wiring (U, V, W). Check VFD display for error codes. Review motor parameters. |
| Motor speed is unstable | Load fluctuations; incorrect V/F curve setting | Check motor load. Adjust V/F curve or other speed control parameters. |
| Aṣiṣe apọju / Apọju | Motor overload; short circuit in motor wiring | Reduce motor load. Inspect motor and wiring for short circuits. Check motor parameters. |
| Apọjutage/ Undervoltage ẹbi | Iwọn titẹ siitage outside range; regenerative braking issue | Ṣayẹwo iwọn didun ipese agbara titẹ siitage. Consider adding a braking resistor if applicable. |
9. Atilẹyin ọja ati Support
Jectse products are manufactured to high-quality standards. For warranty information, please refer to the warranty card included with your product or contact your local distributor.
Atilẹyin Onibara:
If you encounter any issues or have questions not covered in this manual, please contact Jectse customer support or your authorized dealer. When contacting support, please have your product model (AT904-7.5KW) and purchase details ready.