1. Overview
This manual provides essential information for the installation, commissioning, maintenance, and use of the SUSWE 750WBPQ Simple Frequency Converter.
1.1 Unpacking Inspection
Upon receiving the inverter, carefully remove it from its packaging and perform the following checks:
- Verify that the product's appearance is not damaged or deformed.
- Confirm that all components are present and undamaged.
- Check the nameplate on the chassis side to ensure it matches your order requirements.
- Confirm that all items listed in the packing list are complete.
If any damage or missing items are found, please contact the supplier immediately.
1.2 General Guidelines
- Read this manual thoroughly before use and keep it for future reference.
- Power Supply: Single input AC220V ± 40%.
- Operating Temperature: -10 ℃ to 50 ℃.
- Humidity: 0% to 65%.
1.3 Precautions
- Always turn off the power supply before performing any wiring.
- Ensure that AC power is never connected to the motor output terminals.
- The installation site should be free from condensation, dust, and corrosive liquids or gases.
- The installation position must be firm and free from vibration.
- Due to the small overall size, handle wire ends carefully during connection.
- If the ambient temperature is high, ensure sufficient heat dissipation space around the unit.
2. Installation and Wiring
2.1 Dimensions
The frequency converter has the following dimensions:
- Width: 60.5 mm
- Height: 102.5 mm
- Depth: 130 mm
- Hole Size for Mounting: 52.5 mm * 80 mm * 130 mm

2.2 Control Panel Layout
The front panel features a digital display and various control buttons and a potentiometer for frequency regulation.

Panel Elements:
- Display Area: Shows frequency, current, etc.
- RUN Indicator: Operating status.
- FWD Indicator: Motor forward rotation.
- REV Indicator: Motor reverse rotation.
- MODE Key: Function selection, parameter settings, shift left.
- Up/Down Arrow Keys: Parameter setting adjustment.
- ENTER Key: Confirm key, enter parameter mode, save settings.
- JOG Key: Jog operation.
- RUN Key: Inverter panel operation start.
- STOP/RESET Key: Stop operation, clear fault alarm.
- Potentiometer: Adjusts frequency (0-10 scale).
2.3 Wiring Connections
The rear panel provides terminals for power input, motor output, relay output, external sensors, analog input, and 485 communication.

Terminal Descriptions:
- Relay Output (CM, NC, ON): For external control.
- Digital Inputs (X0, X1, X2, X3): For external sensors or control signals.
- Analog Input (AI, A+, B-): 0-5V/0-10V analog input, 4-20mA matching with external 250R resistor.
- Power Input (L, N): Single-phase 220V input.
- Motor Output (U, V, W): Three-phase motor connection.
- Ground (PE): Earth connection.
- 12V/P, 5V, GND: Power outputs for external components.
- 485 Communication (A+, B-): For Modbus communication.
Motor Wiring Diagram:

Note: If the original motor is a three-phase 380V output, use the new wiring method for triangle connection.
Example Wiring for Single-Phase Motor:

3. Operating Instructions
3.1 Key Description
The following 'XXX' represents arbitrary data displayed on the panel.
- MODE Key: Allows viewing of set frequency (Fxxx), operating frequency (Hxxx), operating current (Axxx), motor direction (FWD/REV), input voltage (Uxxx), inverter temperature (TXXX), input point status (Lxxx), and PID parameter display (X.X - X X) indicating setpoint/feedback value.
- Up (▲) Key: Used to add data when setting parameters or increase frequency when controlled by the panel.
- Down (▼) Key: Used to subtract data when setting parameters or decrease frequency when controlled by the panel.
- ENTER Key: Press to enter parameter mode (Pxxx settings) and to save modified parameters.
- JOG Key: Initiates jog operation.
- RUN Key: Starts inverter operation from the panel.
- STOP/RESET Key: Stops operation and clears fault alarms in fault display mode.
- ENTER + Key: A composite key. In panel lock mode, press to unlock the function. If panel lock is enabled, press to enter panel lock function.
3.2 Panel Settings Description
When the panel displays 'Pxxx', use the Up and Down arrow buttons to select the desired parameter number. Press the ENTER key to enter the data mode for that parameter. The data can then be modified. After modification, press ENTER to save. If 'Pxxx' mode is not displayed, press the MODE key until it appears.
3.3 Parameter Description (P00 - P138)
The inverter features a wide range of configurable parameters to fine-tune its operation. Below is a summary of key parameters. For a complete list and detailed settings, please refer to the official PDF user manual available at SUSWE Inverter User Manual (PDF).
| Number | Functional Description | Setting Range | Factory Value |
|---|---|---|---|
| P00 | Main frequency input source setting | 00: Digital operator, 01: Keyboard potentiometer (0Hz below P35), 02: Keyboard potentiometer (P45 below P35), 03: External analog (0Hz below P35), 04: External analog (P45 below P35), 05: 485 communication, 06: PID control mode | 1 |
| P01 | Operation signal source setting | 00: Digital operator, 01: External terminal, 02: 485 communication | 0 |
| P02 | Motor stop mode setting | 00: Deceleration braking, 01: Free running | 0 |
| P03 | Motor rating (maximum frequency) selection | 1.00~400.00Hz | 50.00 |
| P04 | Maximum output voltage selection | 230V:0.1~255.0V, 460V:0.1~510.0V | 220.0 |
| P05 | Intermediate frequency selection | 0.10~400.0Hz | 25.00 |
| P06 | Intermediate voltage selection | 230V:0.1~255.0V, 460V:0.1~510.0V | 110.0 |
| P07 | Minimum output frequency selection | 0.10~20.0Hz | 01.00 |
| P08 | Minimum output voltage selection | 230V:0.1~255.0V, 460V:0.1~510.0V | 30 |
| P09 | First acceleration time selection | 0.01~600.0s | 10.0 |
| P10 | First deceleration time selection | 0.01~600.0s | 10.0 |
| P11 | Second acceleration time selection | 0.01~600.0s | 010.0 |
| P12 | Second deceleration time selection | 0.01~600.0s | 010.0 |
| P13 | The first frequency setting | 0.00~400.0Hz | 15.00 |
| P14 | Second frequency setting | 0.00~400.0Hz | 20.00 |
| P15 | The third frequency setting | 0.00~400.0Hz | 25.00 |
| P16 | The fourth frequency setting | 0.00~400.0Hz | 30.00 |
| P17 | The fifth frequency setting | 0.00~400.0Hz | 40.00 |
| P18 | The sixth frequency setting | 0.00~400.0Hz | 45.00 |
| P19 | The seventh frequency setting | 0.00~400.0Hz | 50.00 |
| P20 | Disable reverse function setting | 00: Reversal prohibited, 01: Reversible, 02: Direction can be saved | 1 |
| P21 | Carrier frequency setting | 01~15 (fc=1kHz~15kHz) | 08 |
| P22 | DC braking current level setting | 00~80% | 00.0 |
| P23 | DC braking time setting at start-up | 0.0~5.0s | 0.0 |
| P24 | DC braking time setting when stopping | 0.0~25.0s | 01.0 |
| P25 | DC braking starting frequency when stopping | 0.00~15.00Hz | 02.50 |
| P26 | Output frequency upper limit setting | 0.10~400.0Hz | 50.00 |
| P27 | Output frequency lower limit setting | 0.00~400.0Hz | 00.00 |
| P28 | Multi-function input mode selection | 0: X0: forward/stop; X1: reverse/stop; 1: X0: Run/Stop; X1: Reverse/Stop; 2: X0: forward/stop; X1: reverse/stop; X2: jog forward; X3: jog reverse; 3: Multi-function input programmable settings (X0-X3 functions are set by P29-P32) | 0 |
| P29 | Multi-function input (X0) | 0: No function; 1: Stop according to deceleration time; 2: Free stop; 3: RESET command; 4: Multi-speed command 1; 5: Multi-speed command 2; 6: Multi-speed command 3; 7: Forward/stop; 8: Reverse/stop; 9: Run/stop; 10: Forward/reverse; 11: Jog forward; 12: Jog reverse; 13: Normally closed deceleration stop; 14: Normally open deceleration stop | 04 |
| P30 | Multi-function input (X1) | Same as P29 options | 05 |
| P31 | Multi-function input (X2) | Same as P29 options | 06 |
| P32 | Multi-function input (X3) | Same as P29 options | 07 |
| P33 | Any frequency setting | 0.00~400.0Hz | 00.00 |
| P34 | Torque compensation gain | 00~10 | 00.0 |
| P35 | AVI minimum setting | 0.0V~P36 | 1.0 |
| P36 | AV maximum setting | P35~10.0V | 9.5 |
| P37 | Automatic reset/start times setting after abnormality | 00~10 | 00 |
| P38 | Automatic reset/restart interval setting after abnormality | 0.0~20s | 00.0 |
| P39 | Analog output gain setting | 00~200% | 082 |
| P40 | Power on operation lock | 00: Operable, 01: Inoperable | 0 |
| P41 | Multi-function output relay contact | 00: Indication of operation, 01: Indication of reaching the set frequency, 02: Indication of reaching any frequency, 03: Fault indication | 03 |
| P42 | Parameter lock/reset settings | 00: All parameter values are set to read/write mode, 01: All parameters are set to read-only mode | 0 |
| P43 | Setting frequency | 0.00~400.00Hz | 05.00 |
| P44 | DC braking frequency at start-up | 0.00~15.00Hz | 0.50 |
| P45 | Analog low-end frequency | 0.00~400.00Hz | 0 |
| P46 | Fault clearing | 0 | 0 |
| P47 | Fault record 1 | * | No |
| P48 | Fault record 2 | * | LU |
| P49 | Fault record 3 | * | No |
| P50 | Fault record 4 | * | No |
| P51 | Latest fault record item | 47~50 | 48 |
| P52 | Motor rated current | 0-65000 | 3.2 |
| P53 | Motor no-load current | 0-65000 | 1.0 |
| P54 | Electric slip compensation coefficient | 0-1000 | 0 |
| P55 | Motor overload protection mode | 0: Thermal equivalent protection mode, 1: Isochronous protection mode | 01 |
| P56 | Motor overload protection level | 0~300% | 150% |
| P57 | Motor overload protection time | 0~600.0S | 60.0S |
| P58 | Overvoltage stall voltage | 0~999.9V | 370.0V |
| P59 | Acceleration stall prevention current level | 0~300% | 150% |
| P60 | Constant speed stall prevention current level | 0~300% | 150% |
| P61 | Deceleration stall prevention current level | 0~300% | 150% |
| P62 | Constant speed overcurrent deceleration time | 0~600.0S | 5.0S |
| P63 | Startup method selection | 0: Start from the starting frequency and accelerate, 1: Start by tracking the frequency | 0 |
| P64 | Fault restart startup mode selection | 0: Fault restart starts from the start frequency, 1: Fault restart starts by tracking the frequency | 0 |
| P65 | Plus and minus key frequency adjustment step value | 0~400.0Hz | 0.10Hz |
| P66 | DAC Output Selection | 0: Set frequency, 1: Output frequency, 2: Output current, 3: Bus voltage, 4: Inverter temperature | 09 |
| P67 | Parameters restored to factory values | 1: Manually save parameters, 8: Restore factory values, Other values: Invalid | 0 |
| P68 | Frequency tracking current level | 0~300% | 150% |
| P69 | Frequency tracking time | 0~900.0S | 3.0S |
| P70 | Frequency tracking voltage rise time | 0~900.0S | 3.0S |
| P71 | Jog frequency | 0~400.0Hz | 10.00Hz |
| P72 | Multi-speed acceleration and deceleration time selection | 0~255 is set in binary weighted mode. Bit1~bit7 correspond to P13~P19 respectively. 0: Acceleration/deceleration time 1, 1: Acceleration/deceleration time 2 | 000 |
| P73 | Inverter rated voltage | 0~550.0V | 220.0 |
| P74 | Inverter rated current | 0~6500.0A | 07.0 |
| P75 | Inverter overload protection level | 0~300% | 150% |
| P76 | Inverter overload protection time | 0~600.0S | 60.0S |
| P77 | Overvoltage protection voltage | 0~999.9V | 400.0V |
| P78 | Undervoltage protection voltage | 0~999.9V | 245.0V |
| P79 | Current detection coefficient | 0~65535 | 30 |
| P80 | Voltage detection coefficient | 0~65535 | 1250 |
| P81 | Output AC voltage coefficient | 0~65535 | 1000 |
| P82 | IO input filter coefficient | 0~65535 | 50 |
| P83 | Fan start temperature | 0~80 | 50 |
| P84 | Motor Type | 0: Three-phase output | 0 |
| P85 | Inverter Type | 0: General inverter | 0 |
| P86 | Dead time | 0~250 | 30 |
| P87 | External brake output percentage | 0-100 | 0 |
| P88 | Software version number | * | 27.39 |
| P89 | Reserve | * | 0000 |
| P90 | Password | * | 0000 |
| P91 | Speed display | The maximum speed corresponding to the maximum frequency | 1500 |
| P92 | Control Mode | 0: VF control | 0 |
| P93 | VF Curve | 0: Straight line VF curve | 0 |
| P94 | Bus voltage filter time | 10~1000MS | 10 |
| P95 | Output current sampling filter time | 10~10000MS | 05.00S |
| P98 | Panel Display Locked Items | 0-7 (0 means no lock function, ENTER+DOWN key enables lock function) | 0 |
| P99 | Overcurrent protection detection sensitivity | 0-9 (0 position disables over-current protection) | 5 |
| P100 | 485 Correspondence Address | 1-255 | 8 |
| P101 | Communication format (Modbus RTU 8-bit data, no parity, 1 stop bit) 40000 start address represents P00 | 0=1200, 1=2400, 2=4800, 3=9600, 4=19200, 5=38400, 6=57600, 7=115200. Baud rate changes require the inverter to be restarted to take effect. | 3 |
| P102 | 485 frequency given value | 0-400.00 | 15.00 |
| P103 | 485 Run Settings | Each bit represents a different function. Bit0: 0=stop, 1=run. Bit1: 0=forward, 1=reverse. Bit2: 0=jog stop, 1=forced jog run. Bit3: 0=deceleration stop, 1=free stop, 2=brake stop. | 0000 |
| P104 | Reserve | 0 | |
| P105 | Reserve | 0 | |
| P106 | PID Configuration | Units: 0 = single-action, 1 = double-action. Tens: 0 = negative action, 1 = positive action. Hundreds: 0 = no alarm for PID failure, 1 = deceleration stop, 2 = free stop. | 100% |
| P107 | PID output limit | 0-100 | 100% |
| P108 | PID given signal selection | 0: Keyboard key setting, 1: Keyboard potentiometer setting, 2: AI1 external analog setting, 3: AI2 external analog setting | 0 |
| P109 | PID feedback signal selection | 0: Keyboard key setting, 1: Keyboard potentiometer setting, 2: AI1 external analog setting, 3: AI2 external analog setting | 2 |
| P110 | PID integral time | 0.001-9.999 | 0.250 S |
| P111 | PID differential time | 0.000-9.999 | 0010 S |
| P112 | PID proportional gain | 0.000-9.999 | 3000 |
| P113 | PID sampling period | 0.001-9.999 | 0.010S |
| P114 | PID deviation limit | 0.0-20.0 | 00.2 |
| P115 | PID fault detection time | 0.0-9.9 | 180.0S |
| P116 | PID fault detection value | 0.0-100.0 | 0.2% |
| P117 | PID display range | 0.00-1.99 | 10.00 |
| P118 | PID keyboard given value | 0.0-9.9 | 25.0 |
| P122 | Start pressure deviation | 0.0-9.9 | 01.0 |
| P123 | Start delay time | 0.0-32.000 | 001.0S |
| P124 | Shutdown frequency | 0.0-400.0 | 20.00Hz |
| P125 | Shutdown delay time | 0.0-32.000 | 002.0S |
| P137 | Input port polarity | 0: Normally open input 1, Normally closed input. Units: 0=X0 and X1 are both normally open, 1=X0 is normally closed and X1 is normally open, 2=X0 is normally open and X1 is normally closed, 3=X0 and X1 are both normally closed. Tens: 0=X2 and X3 are both normally open, 1=X2 is normally closed and X3 is normally open, 2=X2 is normally open and X3 is normally closed, 3=X2 and X3 are both normally closed. | 0000 |
| P138 | Input port type | 0: Stop when jog input is disconnected, 1: Hold when jog input is disconnected (refer to P137) | 0000 |
4. Maintenance
Regular maintenance ensures the longevity and optimal performance of your frequency converter. While specific maintenance schedules are not detailed in the provided information, general best practices include:
- Keep the unit clean and free from dust and debris.
- Ensure proper ventilation and heat dissipation. Regularly check that cooling fans (if present) are operating correctly and not obstructed.
- Inspect wiring connections periodically for tightness and signs of wear or corrosion.
- Avoid exposing the unit to excessive humidity, corrosive gases, or extreme temperatures.
- If the unit is stored for an extended period, ensure it is in a dry, stable environment.
5. Troubleshooting (Fault Codes)
The inverter provides fault codes to help diagnose operational issues. Refer to the table below for common fault types, descriptions, and suggested actions.
| Alarm Type | Fault Description | Fault Notes | Fault Number |
|---|---|---|---|
| OC | Instantaneous overcurrent | Fault explanation | 3 |
| OCA | Acceleration overcurrent | Check whether the motor is normal | 4 |
| OCD | Deceleration overcurrent | Adjust the acceleration time appropriately | 5 |
| OCN | Constant overcurrent | Adjust the deceleration time appropriately | 6 |
| OU | Overpressure | Check whether the machine is normal and the voltage is stable | 7 |
| LU | Undervoltage | Adjust the acceleration and deceleration time appropriately and check whether the mains power is normal. | 8 |
| OH | Inverter overheating | Check whether the mains power is normal (180V-240V) | 9 |
| EF | External fault | Check whether the inverter is cooling normally | 10 |
| ERS | Fault restart failure | Check external sensor, whether the input is normal | 11 |
| LP | Input phase loss | Restart the inverter | 12 |
| OL1 | Motor overload | Check whether the mains power is normal | 13 |
| OL2 | Inverter overload | Check whether the motor is normal and whether the load is too heavy | 14 |
| OL3 | Temporary overload of motor | Check whether the motor is normal and whether it matches the inverter power. | 15 |
| OL4 | The inverter is temporarily overloaded. | Check whether the load matches the motor | 16 |
| 485 | Communication failure | Check whether the motor matches the inverter power | 17 |
| PID | PID Failure | Check whether the communication line and the host computer communication are normal | 18 |
| CU | No fault alarm | Check whether the analog input is output and whether the sensor is normal | 21 |
6. Specifications
| Feature | Specification |
|---|---|
| Brand Name | SUSWE |
| Model Number | 750WBPQ |
| Type | DC/AC Inverters |
| Output Type | SINGLE |
| Output Current | 4A |
| Output Frequency | 50hz-400hz |
| Supply Voltage | 220V |
| Power Phase Number | Three-phase |
| Adapt Motor Power | 0.2-0.75KW |
| Control Mode | Digital display |
| Application Scope | Motor speed regulation |
| Size (L*W*H) | 130*60.5*80 mm |
| Weight | 0.52 kg |
| Origin | Mainland China |
| Certification | CE |
| is_customized | Yes |
| High-concerned chemical | None |
7. Warranty and Support
The SUSWE 750WBPQ Simple Frequency Converter is designed for reliable performance. For specific warranty terms and conditions, please refer to the documentation provided at the time of purchase or contact your vendor. General support for product inquiries and technical assistance can be obtained through the seller or manufacturer's official channels.
For additional resources, you may refer to the official user manual PDF: SUSWE Inverter User Manual (PDF).
8. User Tips
Based on general best practices for frequency converters:
- Motor Compatibility: Always ensure the motor's power rating and voltage are compatible with the inverter's specifications to prevent damage and ensure efficient operation.
- Proper Grounding: A secure and proper ground connection (PE terminal) is crucial for safety and to prevent electrical noise.
- Parameter Tuning: Take time to understand and adjust the parameters (P00-P138) to match your specific motor and application requirements for optimal performance and energy efficiency.
- Heat Management: Ensure the inverter is installed in a location with adequate airflow to prevent overheating, especially during continuous operation or in high ambient temperatures.
- Wiring Quality: Use appropriate gauge wiring for power input and motor output to minimize voltage drop and heat generation. Ensure all connections are tight and secure.
- External Control: If using external control signals (e.g., for jog, forward/reverse, or analog input), double-check the wiring and parameter settings (P28-P32) to ensure correct functionality.
9. Quality Assurance
The SUSWE frequency converter undergoes a rigorous manufacturing process to ensure quality and reliability. This includes careful design, precise component placement, and thorough inspection.





