DEWIN 0.75kW 220V Single-Phase Input Three-Phase Output Variable Frequency Drive Inverter (Model: JLS-E-2S-0.75G) User Manual

1. Important Safety Information

Please read this user manual thoroughly before operating the DEWIN Variable Frequency Drive (VFD). Failure to follow instructions may result in electrical shock, equipment damage, or personal injury. Keep this manual for future reference.

Electrical Shock Hazard: This device operates with high voltage. Only qualified personnel should perform installation, wiring, and maintenance.
Power Disconnection: Always disconnect all power sources before servicing the VFD. Wait at least 10 minutes after removing power to allow capacitors to discharge before touching any components.
Proper Grounding: Ensure the VFD is properly grounded according to local electrical codes.
Environmental Conditions: Install the VFD in a clean, dry, and well-ventilated area, free from dust, corrosive gases, and excessive humidity.

DEWIN 0.75kW VFD with dimensions and warning label — **Figure 1.1:** DEWIN 0.75kW VFD with dimensions (Width: 85mm, Height: 140mm, Depth: 115mm). The warning label indicates to read the manual before operation and to wait 10 minutes after power removal before servicing due to electrical shock risk.

2. Product Overview

The DEWIN Variable Frequency Drive (VFD) is designed to convert single-phase 220V input into three-phase 220V output, allowing for precise speed control of three-phase motors. It features a unique control method for high torque, high precision, and a wide speed range.

2.1 Key Features

Integrated Radiator: Equipped with a radiator for efficient heat dissipation, ensuring stable long-term operation.
Unique Control Method: Achieves high torque, high precision, and a wide speed range.
User-Friendly: Compact size, easy to install, quick start/stop response, and significant torque at low speeds.
High Performance: Excellent anti-aging and anti-snap performance, adaptable to sudden power changes, temperature, humidity, and dust interference, enhancing stability.
Nine-Fold Protection: Includes protection against overvoltage, undervoltage, overcurrent, overload, overtemperature, power module faults, ground faults, short circuits, and motor stall.

Diagram showing nine-fold protection technology icons — **Figure 2.1:** The VFD incorporates nine protection technologies: Overvoltage, Undervoltage, Overcurrent, Overload, Overtemperature, Power Module Protection, Ground Protection, Short Circuit, and Stall Protection.

2.2 Control Panel Components

DEWIN VFD control panel with labeled buttons and indicators — **Figure 2.2:** Control Panel Interface. Key components include: Status Indicators (RUN, DIR, TRIP, HZ), Digital Display (showing current, voltage, frequency), Multifunction Key (MF), Menu Key (PRG), Speed Knob, Enter Key (ENTER), Shift Key, Up/Down Selection Keys, Run Key (RUN), and Stop/Reset Button (STOP/RESET).

The control panel is designed for intuitive operation and can be detached for easier wiring and installation via screw terminals.

DEWIN VFD with its control panel detached — **Figure 2.3:** The control panel can be freely removed, simplifying operation and wiring connections through screw terminals.

3. Setup and Wiring

Proper wiring is crucial for the safe and correct operation of the VFD. Ensure all power is disconnected before proceeding with any wiring.

3.1 Basic Power and Motor Wiring

Connect the single-phase 220V AC input to terminals L1 and L2. Connect the ground wire to the ground terminal. Connect the three-phase motor to output terminals U, V, and W.

Basic wiring diagram for DEWIN 220V inverter — **Figure 3.1:** Basic wiring diagram. Connect the 220V single-phase power supply to L1 and L2. Connect the ground wire to the ground terminal. Connect the three-phase motor to U, V, and W.

Simplified wiring diagram for DEWIN VFD applications — **Figure 3.2:** Simplified wiring for wide applications. Shows AC 220V single-phase input connected to the VFD, and AC 220V three-phase output connected to the motor.

3.2 Detailed Control Wiring

The VFD offers various control input and output terminals for advanced functionality, including multi-speed control, analog frequency commands, and fault indications.

Detailed wiring instructions diagram for DEWIN VFD — **Figure 3.3:** Detailed wiring instructions. This diagram illustrates connections for multifunction input terminals (X1-X5 for forward/stop, reverse/stop, fault reset, multi-speed control), common signal terminal (GND), three-phase induction motor (M3~), multifunction indication output contacts (TC, TB, TA), multifunction photoelectric output (Y1), analog output (AO), analog voltage frequency command (AVI), and analog current frequency command. Jumper settings for ground, 485 terminal resistance, AO output, and input selection are also shown.

3.3 Braking Resistor Connection

The VFD is equipped with an integrated braking resistor. If an external braking resistor is required for applications with high inertia loads or frequent braking, connect it to the P and PB terminals.

Diagram showing integrated braking resistor and external connection points — **Figure 3.4:** The VFD has an integrated braking resistor. For external braking resistor connection, use the P/PB terminals.

4. Operating Instructions

This section describes the basic operation of the VFD using the control panel.

4.1 Power On and Initial Display

After connecting power, the VFD's digital display will illuminate, showing the current operating status or a default frequency. The status indicators (RUN, DIR, TRIP, HZ) will provide visual feedback.

4.2 Speed Adjustment

The VFD allows for continuous speed regulation from 0 to 999Hz, providing precise control over motor speed.

Using the Speed Knob: Rotate the speed knob on the control panel to adjust the output frequency and, consequently, the motor speed. Turning clockwise increases speed, counter-clockwise decreases it.
Digital Adjustment: For precise frequency settings, use the PRG (Menu) button to enter parameter settings, then use the Up/Down keys and ENTER button to modify the frequency parameter. Refer to the detailed parameter list in the full manual for specific parameter codes.

DEWIN VFD speed adjustment knob with description — **Figure 4.1:** Adjust speed with a simple turn of the knob. Continuous speed regulation from 0-999Hz is applicable to most motors.

4.3 Start and Stop Operation

Start: Press the RUN button to start the motor. The RUN indicator will illuminate.
Stop: Press the STOP/RESET button to stop the motor. The RUN indicator will turn off.
Reset: If a fault occurs and the TRIP indicator is lit, pressing the STOP/RESET button will clear the fault and reset the VFD.

5. Maintenance

Regular maintenance ensures the longevity and reliable operation of your DEWIN VFD.

Cleaning: Keep the VFD clean and free from dust. Use a soft, dry cloth for cleaning. Do not use liquid cleaners.
Ventilation: Ensure proper airflow around the VFD. The integrated radiator requires unobstructed ventilation to dissipate heat effectively.
Connection Checks: Periodically inspect all wiring connections for tightness and signs of wear or corrosion. Loose connections can lead to poor performance or damage.
Environmental Monitoring: Ensure the operating environment remains within specified temperature and humidity ranges to prevent damage.

6. Troubleshooting

This section provides general guidance for common issues. For complex problems, consult a qualified technician.

VFD Not Powering On: Check the input power supply and ensure all connections are secure. Verify the circuit breaker or fuse is not tripped.
Motor Not Running: Ensure the VFD is receiving a RUN command. Check motor wiring for correct phase sequence and secure connections. Verify the frequency setting is not 0Hz.
TRIP Indicator On: This indicates a fault. Press the STOP/RESET button to clear the fault. If the fault persists, identify the fault code displayed (if any) and refer to the full manual's fault code section for specific causes and remedies. Common faults include overcurrent, overvoltage, and overload.
Abnormal Motor Noise or Vibration: Check motor parameters in the VFD settings. Ensure the motor is properly mounted and balanced.

7. Specifications

Feature	Specification
Brand	DEWIN
Model	JLS-E-2S-0.75G
Power Rating	0.75kW
Input Voltage	220V Single-phase
Output Voltage	220V Three-phase
Dimensions (L x W x H)	115mm x 85mm x 140mm (approx.)
Item Weight	1.12 Kilograms
Frequency Range	0-999Hz (Continuous regulation)

8. Warranty and Support

For warranty information, please refer to the terms provided at the point of purchase or contact your seller. For technical support or further inquiries, please contact DEWIN customer service through their official channels.

DEWIN JLS-E-2S-0.75G