1. Introduction
This manual provides essential information for the safe and efficient operation of your Huanyang (HY) GT Series 7.5kW Power Vector Inverter (VFD). This VFD is designed for controlling the speed of three-phase motors, suitable for both constant torque loads (e.g., air compressors, HVAC units) and variable torque loads (e.g., pumps, fans). It can also function as a phase converter. Please read this manual thoroughly before installation, operation, or maintenance.
2. Safety Information
Always observe the following safety precautions to prevent personal injury or damage to the equipment:
- Ensure the VFD is installed by qualified personnel only.
- Disconnect all power before performing any wiring, maintenance, or inspection.
- Do not touch internal components immediately after power-off, as residual voltage may be present.
- Ensure proper grounding to prevent electric shock.
- Do not operate the VFD with damaged cables or if the casing is open.
- Protect the VFD from moisture, dust, direct sunlight, and corrosive gases.
- Verify that the input voltage matches the VFD's specifications (220V or 380V).
3. Package Contents
Depending on your order, your package will include one of the following:
220V Package:
- 1 x 7.5kW Inverter VFD 220V HY Brand (220V 1-phase input and 220V 3-phase output)
- 1 x 2M Extension cable
- 1 x English user manual of inverter
380V Package:
- 1 x 7.5kW Inverter VFD 380V HY Brand (380V 3-phase input and 380V 3-phase output)
- 1 x 2M Extension cable
- 1 x English user manual of inverter
4. Product Features
- Control Mode: SPWM (Sine Wave PWM) for excellent performance.
- DSP Control System: Adopts DSP control system for speed sensorless vector control.
- Humanized Keyboard: Reasonable layout, easy operation, digital display, intuitive and clear.
- Smart High-End Motherboard: Intelligent and efficient with strong protection performance.
- Convenient Body Design: Easy disassembly, installation, and maintenance.
- PLC Function: Easy PLC function can realize 16 steps of speed and inverter control.
- Communication: RS485 communication port, adopting standard international MODBUS main circuit control.
- Anti-Jamming Capability: Extremely strong anti-jamming capability.
- Torque Performance: Low output rating torque 0.5Hz-150%, low speed running ability. Torque increase settable by max. 10.0%. Starting torque can reach 150% at 1.0Hz.
- Quiet Operation: Carrier adjustable by 16KHz, completely soundless working environment.
- Voltage Range: Broad voltage working area.
- AVR Technique: Auto Voltage Regulation (AVR) technique for ensuring inverter load capability.
- Control Techniques: Various control techniques by both synchronization and non-synchronization, dynamically realizing fast starting without changing brakes.
- Protection: Perfect error protection and short circuit starting protection capability.
- Quality Certification: ISO9001 Quality certification.
5. Specifications
| Category | Parameter | Value/Description |
|---|---|---|
| General | Series | HY inverters |
| Control Mode | SPWM | |
| Electrical | Input Power | 220V class: 220V (+/-15%) / 380V class: 380V (+/-15%) |
| Input Phase | 1 OR 3 Phase (depending on model) | |
| Output Type | Triple (3-phase) | |
| Display | 5-Digits Display & Status Indicator Lamp | Displaying frequency, current, revolution, voltage, counter, temperature, FOR or REV rotation, and fault, etc. |
| Communication Interface | RS-485 | |
| Environmental | Working Temperature | -10~40 Celsius Degrees |
| Humidity | 0-95% Relative Humidity (without dew) | |
| Vibration | Below 0.5G | |
| Frequency Control | Range | 0.1~2500.0Hz |
| Accuracy | Digital: 0.1% (-10~40 Celsius Degrees); Analog: 0.1% (15-45 Celsius Degrees) | |
| Setting Resolution | Digital: 0.1Hz; Analog: 0.1% of max. Operating frequency | |
| Output Resolution | 0.1Hz | |
| Operator Setting Method | Press directly keys to set. | |
| Analog Control | Analog Setting Method | External Voltage 0-5V, 0-10V, 4-20mA, 0-20mA |
| Other Frequency Functions | Frequency lower limit, starting frequency, stopping frequency, three skip frequencies can be respectively set. | |
| Motor Control | Ramp Control | Selectable 4-speed steps ramp-up and -down time (0.1-6500s). |
| V/F Curve | Set V/F curve at will. | |
| Torque Control | Torque increase settable by max. 10.0%. The starting torque can reach 150% at 1.0Hz. | |
| I/O | Multi-Inputs | 6 multi-function input terminals for 8-speed steps control, program operation, switching of 4-speed Ramp, UP/DOWN function, counter, external emergency stop and other functions. |
| Multi-Outputs | 5 multi-output for displaying of running, zero speed, counter, external abnormity, program operation and other information and warnings. | |
| Dimensions | Size (L x W x H) | 27cm x 23cm x 15cm (approx.) |
| Weight | 3.0 kg (approx.) |
6. Setup and Installation
6.1 Control Panel Overview
6.2 Wiring Instructions
Ensure all wiring is done with power disconnected. Refer to the diagrams below for correct terminal connections.
Function Description of Main Circuit Terminals:
| Symbol | Function Description |
|---|---|
| R, S, T | Input terminal of AC line power (220V class, for both single/three phase, single phase connected to any two phases) |
| U, V, W | Output terminal of the inverter |
| P, P+ | Connector for braking resistor (optional) |
| E | Ground terminal: the third method of grounding for 220V and special grounding for 380V of Electrical Engineering Regulations. |
Function Description of Control Circuit Terminals:
| Symbol | Function Description | Factory Setting |
|---|---|---|
| FOR | Multi-Input 1 | Forward run |
| REV | Multi-Input 2 | Reverse run |
| RST | Multi-Input 3 | Reset |
| SPH | Multi-Input 4 | High speed |
| SPM | Multi-Input 5 | Middle Speed |
| SPL | Multi-Input 6 | Low Speed |
| DCM(COM) | Common Terminal of Digital and Control Signals | |
| +10 | Power Supply for Speed Setting | ±10V |
| V1 | Analog Voltage Frequency Reference Input | 0~10V corresponding to the highest operating frequency |
| AI | Analog Current Frequency Reference Input | 4~20mA corresponding to the highest operating frequency |
| ACM(GND) | Common Terminal of Analog and Control Signals | |
| DRV | Multi-Output 1 (Optical couple output) | DC24V/100mA |
| UPF | Multi-Output 2 (Optical couple output) | |
| FA (MB) | Multi-Output 3 (N/O or N/C) | 3A/250VAC |
| FC (MA) | ||
| V0 | Output terminals of digital frequency | 0~10V |
| RS+ RS- | RS485 Communication port |
6.3 Initial Parameter Settings
If your motor's rated RPM is not 24000rpm, you will need to adjust the VFD parameters. Before changing any parameters, it is recommended to perform a factory reset. Then, change parameter PD013 to 8. After this, you can proceed to adjust other motor-specific parameters as needed.
7. Operating Instructions
7.1 Basic Operation
- RUN Button: Press to start the motor.
- STOP/RST Button: Press to stop the motor or reset fault conditions.
- Frequency Adjustment: Use the up/down arrow keys or the speed adjustment knob on the control panel to change the output frequency, thereby controlling motor speed.
- PRGM/ESC Button: Enters/exits programming mode.
- DATA/SET Button: Used to confirm parameter changes.
- SHIFT Button: Used to shift between digits when setting parameters.
7.2 Control Modes
The VFD utilizes SPWM (Sine Wave PWM) for precise motor control. It supports various control techniques for both synchronization and non-synchronization, allowing for fast starting without changing brakes.
7.3 Multi-Function Inputs/Outputs
The VFD features 6 multi-function input terminals for controlling 8-speed steps, program operation, 4-speed ramp switching, UP/DOWN functions, counter, and external emergency stop. It also has 5 multi-outputs for indicating running status, zero speed, counter, external abnormality, program operation, and other warnings.
8. Maintenance
- Regular Cleaning: Keep the VFD clean and free from dust and debris. Use compressed air to clear ventilation openings.
- Inspection: Periodically check all wiring connections for tightness and signs of wear or damage.
- Environmental Control: Ensure the operating environment remains within specified temperature and humidity ranges to prolong the VFD's lifespan.
- Cooling System: For water-cooled spindles, regularly check the water pump and ensure adequate water flow and cleanliness to prevent overheating.
9. Troubleshooting
The VFD includes perfect error protection and short circuit starting protection. Common issues and their potential causes/solutions are:
- Overload Protection: If the motor draws excessive current (e.g., 150% for constant torque, 120% for fan types), the VFD will trigger overload protection. Check for mechanical binding, incorrect motor parameters, or excessive load.
- Fuse Protection: If the internal fuse breaks, the motor will stop. This indicates a severe electrical fault; inspect the wiring and motor for short circuits.
- Over-voltage: The VFD will protect against over-voltage (e.g., DC Voltage >400V for 220V class, >800V for 380V class). Check input power supply stability and braking resistor if used.
- Under-voltage: Protection against under-voltage (e.g., DC Voltage <200V for 220V class, <400V for 380V class). Verify stable input power supply.
- Output Short Circuit: Electrical circuit protection will activate if a short circuit is detected at the output terminals. Immediately disconnect power and inspect motor wiring.
- Fin Over-heat Protection: If the VFD's internal temperature exceeds safe limits, it will shut down. Ensure adequate ventilation and clear any obstructions from cooling fins.
- Fault Reset: After resolving a fault, press the STOP/RST button to clear the error and restart operation.
10. User Tips
- Motor RPM Matching: Always ensure the VFD parameters are correctly set to match your motor's rated RPM. If your motor is not 24000rpm, remember to perform a factory reset and set PD013 to 8 before adjusting other parameters.
- Cooling: For high-speed spindles, especially those with water cooling, regularly check the water pump and ensure the cooling system is functioning optimally to prevent overheating and prolong spindle life.
- Parameter Backup: It is good practice to record your VFD's parameter settings after successful configuration for quick restoration if needed.
11. Warranty and Support
This product comes with a 1-year warranty from the date of purchase. For technical support or warranty claims, please contact your seller or the manufacturer directly. Ensure you have your purchase details and product model number (GT-7R5G-4) available.
