To Next PageTo Next PageWhy is my MEIDEN THYFREC-VT240S showing overvoltage during constant speed operation?
An overvoltage during constant speed operation in your MEIDEN Inverter could be because the power supply voltage has risen; reduce the voltage to within the specified range. The rotation speed or load may have fluctuated. The overcurrent limit may have functioned because of a sudden change in the load. Refer to OC-2 and 3 above.
What to do if my MEIDEN THYFREC-VT240S shows an emergency stop error?
If your MEIDEN Inverter shows an emergency stop error, it could be due to the sequence input EMS being activated. In this case, check the signal wiring. Also, this fault can occur if C00-4 is set to 2.
Why does my MEIDEN THYFREC-VT240S show an undervoltage error?
An undervoltage error on your MEIDEN Inverter usually indicates a drop in power voltage, input phase failure, or an instantaneous power failure. To resolve this, examine the power supply system and correct any issues.
How to fix a blown fuse in my MEIDEN THYFREC-VT240S Inverter?
If the fuse in your MEIDEN Inverter has blown, check the main circuit input/output wiring to ensure it's correct. Also, inspect the unit for any foreign debris, short circuits, or ground faults.
What causes an input phase failure in a MEIDEN Inverter?
An input phase failure in your MEIDEN Inverter could stem from a phase failure in the AC input power supply. Investigate the AC input power supply and eliminate the phase failure. Alternatively, the AC input wiring might be disconnected, so check the wire tightening.
What does a power module error mean on my MEIDEN Inverter?
A power module issue in your MEIDEN Inverter might indicate that the short circuit protection circuit has been activated. The power module in the main circuit may be broken, so replace it if you notice any abnormality. Also, a short circuit in the load may have occurred. The power module may have malfunctioned due to noise. In this case, improve the installation environment in respect to noise, such as the grounding method or wiring distance.
What does parallel unit signal cutoff mean on my MEIDEN THYFREC-VT240S Inverter?
If your MEIDEN Inverter displays a parallel unit signal cutoff, it means that the connection signal was disconnected when using a parallel machine. Check the wiring and connector.
How do I troubleshoot a speed deviation error on my MEIDEN THYFREC-VT240S?
A speed deviation error in your MEIDEN Inverter indicates that the difference between the motor rotation speed command value and detected value exceeds the error detection setting value (C24-5, 6). Verify the encoder wiring. The speed command may be set incorrectly, or the S-pattern characteristics setting may be too high; set the speed command and B10-4 properly.
How to resolve an overspeed error on a MEIDEN Inverter?
An overspeed error on your MEIDEN Inverter indicates that the motor rotation count exceeded the overspeed setting value (C24-0). Try adjusting the ASR response (A10-0, 1) to suppress the overshooting. Increasing the acceleration time setting (A01-0) or changing the speed setting to be more gradual may also help.
What does an output phase failure indicate on my MEIDEN THYFREC-VT240S?
An output phase failure in your MEIDEN Inverter could mean the motor's primary coil is incorrect, so check the motor. The motor wiring may be disconnected, so check the wire tightening.
Important safety warnings regarding high voltage and potential hazards during operation and maintenance.
Procedures for inspecting and storing the inverter after purchase to ensure correct usage and prevent damage.
Explanation of information presented on the inverter's rating nameplate and how to interpret the model type.
Guidelines for selecting a suitable installation location, considering temperature, humidity, and environmental factors.
Step-by-step instructions for physically installing the inverter and connecting wiring, detailing procedures for different unit sizes.
Critical safety precautions and guidelines for connecting power supply and motor wiring to prevent electric shock, fires, or damage.
Guidelines for wiring control signals, including wire types, lengths, and precautions to prevent interference or incorrect operation.
A flowchart outlining the sequence of steps for performing test operations and adjustments before initial use.
Essential checks and preparations required before applying power to the inverter and motor to ensure safe and correct operation.
Explanation of the four available control modes and two overload modes, and how to select them using parameter C30-0.
Procedures for using the automatic tuning function to optimize motor parameters for best performance across different control modes.
Detailed steps and modes for performing automatic tuning for V/f control, including simple and high-function adjustment modes.
Procedures for automatic tuning of IM motor control modes, covering sensor-less vector and vector control with sensor.
Steps for automatic tuning and test operation specifically for PM motors with sensor control, including preparation and procedure details.
Instructions for adjusting the magnetic pole position estimation function, crucial for PM motor control accuracy.
A list of potential automatic tuning error codes, their causes, and recommended countermeasures.
Overview of the two types of operation panels (LCD and LED) and their general functions and configurations.
Detailed explanation of operations and displays specific to the LCD panel, including data display and character scrolling.
Explanation of how to operate and display parameters and settings using the LED panel.
Instructions on how to assign and change Block-B and Block-C parameters using Block-A settings.
Explanation of how parameters differ based on control modes (V/f, IM vector, PM motor) and parameter organization by block.
Detailed description of the terminal block functions for control input and output signals.
Examples of control input/output circuit wiring with associated precautions.
Explanation of sequence signal input contacts and their default assignments for functions like forward run, reverse run, and emergency stop.
Details on the standard sequence output channels (relay and open collector) and their programmable functions.
A diagram illustrating the logic for sequence inputs, including basic operation and auxiliary operation paths.
How to assign and monitor sequence input and output terminals using parameters.
Explanation of the types of analog inputs available and how to assign them to internal setting signals.
Description of the analog output channels (A01, A02) and how to select voltage or current output modes.
Overview of how to select speed and torque settings using parameters or sequence inputs.
Description of various monitor parameters that display inverter status, motor speed, current, voltage, and other operational data.
Grouping of frequently used parameters related to frequency setting, acceleration/deceleration, torque boost, and DC brake.
Detailed listing of parameters for basic functions, extended functions, and software options, covering motor circuit constants and automatic tuning.
Parameters for basic, extended, and hardware option functions, including control methods, input/output terminals, and communication settings.
Parameters related to utility mode functions such as parameter copy, password settings, and built-in PLC functions.
Detailed explanations of various monitor parameters, including output frequency, motor speed, current, and fault status.
Guidelines for selecting overload modes (Normal-duty, Heavy-duty) based on load and unit capacity.
Explanation of the IM vector control speed system and parameters related to speed regulation, torque limiting, and filters.
Details on parameters specific to PM motor control, including circuit constants, current regulator, and weak field current settings.
How to operate an auxiliary drive motor by switching control modes and selecting auxiliary drive numbers using sequence inputs.
Overview of the VT240S's built-in PLC function, its features, processing system, and related parameters.
Information on standard serial and Modbus communication protocols, connection methods, and transmission procedures.
Overview of available stand-alone options and main circuit wiring devices for the VT240S Series.
Description of the built-in PCB options (I, II, III) mounted on the control PCB for expanded functionality.
Information on the dynamic braking option, including built-in DB circuits and external DB resistors.
Details on selecting and outlining ACL (Active Current Limiter) and DCL (DC Link) options for harmonic suppression and power factor improvement.
Guidelines for selecting and installing EMI filters to ensure EMC compliance for various unit sizes and environments.
Periodic and daily inspection items to ensure the VT240S operates correctly and safely, covering environmental conditions and component checks.
Recommended measuring devices and circuits for accurately measuring voltage, current, and power, considering harmonic distortion.
Description of the inverter's built-in protective functions, such as overcurrent, overvoltage, and phase failure detection.
A guide to identifying and resolving common faults displayed on the inverter, including causes and countermeasures.
Guidance for diagnosing and resolving issues that occur without a specific fault code being displayed.
Important considerations for using the inverter as a UL/cUL standard compatible product, covering ambient temperature, wiring, and protection.
Information on meeting EMC and Low Voltage Directives, including installation environment and filter requirements.
Guidelines for selecting and connecting input filters to ensure EMC compliance, including maximum distances.
Recommendations for selecting and installing power cables, including screened cables and proper termination.
Guidelines for selecting and wiring control leads, emphasizing screening and separation from power cables.
Proper earthing methods for the drive, motor, and filters to ensure safety and minimize electromagnetic interference.
Explanation of EMC directives concerning immunity and emission requirements for electrical drives.
Advice on using CE-marked measuring devices and potential EMC compliance testing for export.
Method for installing the inverter in a metal cabinet to achieve higher EMC compliance levels.
Guidance on selecting and fitting EMI filters and ferrite cores to meet EMC requirements.
System specifications for VT240S drives, including rated capacity, current, voltage, and optional features.
Mechanical outline dimensions and weight specifications for various VT240S inverter models.
A comprehensive list of fault codes, their display symbols, descriptions, and retry possibilities.
Explanation of various display messages shown on the operation panel during different modes and events.
Visual representation of numeric and alphabetic characters displayed on the segment LED panel.
A table detailing revisions made to the document, including page numbers, revision details, and software versions.
General| Output Frequency | 0-400Hz |
|---|---|
| Rated Capacity | 240kVA |
| Cooling Method | Forced air cooling |
| Control Method | PWM Control |
| Protection Features | Overvoltage, Undervoltage, Short Circuit |
| Communication Interface | RS-485 |
| Ambient Temperature | -10 to +50°C |
| Storage Temperature | -20 to 65°C |
| Humidity | 5% to 95% (non-condensing) |
| Altitude | Up to 1000 m above sea level |
| Input Voltage | 3-phase 380-480V AC 50/60Hz |
