Category: Other Drives

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What Does “LL” Fault Mean on Eura Drives E800 Series Inverter, and How to Solve It?

Introduction

The E800 series of Eura Drives inverters is a widely used device in the field of industrial control, with its stability and reliability being crucial to users’ production activities. However, in practical applications, users may encounter various faults and issues, among which the “LL” fault displayed upon power-up is a particularly perplexing one.

The label of Eura Drives E800 Inverter

The Meaning of “LL” Fault

Upon power-up, if the E800 series inverter of Eura Drives displays the “LL” fault code and cannot be reset by pressing any buttons, it typically indicates a specific issue with the inverter. Unfortunately, the user manual may not explicitly state the meaning of the “LL” fault code. However, within the communication section, under the explanation of communication address meanings, the operational status parameter address 1005 mentions the inverter status: “OXOC (LL)”.

Despite the brief mention, there is no further elaboration on the “LL” fault code in the manual. Nevertheless, based on our experience and understanding of inverter fault codes, the “LL” fault on Eura Drives E800 series inverters generally indicates a low voltage fault. This means that the input voltage to the inverter is below the acceptable range, causing the inverter to malfunction and display the “LL” fault code.

Physical image of Eura Drives inverter displaying LL fault

Solutions to the “LL” Fault

To resolve the “LL” fault on Eura Drives E800 series inverters, the following steps can be taken:

  1. Check the Input Voltage:
    • Verify that the input voltage supplied to the inverter is within the specified range. For the E800 series, the input voltage range is typically three-phase 380V to 480V (with a tolerance of +10% to -15%) or single-phase 220V to 240V (with a tolerance of ±15%).
    • Use a voltmeter to measure the voltage at the inverter’s input terminals.
  2. Inspect the Power Supply:
    • Ensure that the power supply is stable and reliable. Check for any potential issues such as voltage fluctuations, surges, or drops that may affect the input voltage to the inverter.
  3. Review the Wiring:
    • Examine the wiring between the power source and the inverter to ensure that it is correct and free from any damage or loose connections.
  4. Check the Fuse and Circuit Breaker:
    • Verify that the fuse or circuit breaker protecting the inverter’s power supply circuit is not blown or tripped. Replace it if necessary.
  5. Consult the Manual and Technical Support:
    • If the issue persists after checking the above points, refer to the user manual for additional troubleshooting steps or contact Eura Drives’ technical support for assistance.
  6. Reset the Inverter:
    • Once the issue with the input voltage has been resolved, try resetting the inverter by pressing the reset button or cycling the power to see if the “LL” fault code clears.

Conclusion

The “LL” fault on Eura Drives E800 series inverters is generally indicative of a low voltage issue. By carefully checking the input voltage, power supply, wiring, fuse, and circuit breaker, and taking appropriate corrective actions, users can often resolve this fault and restore normal operation of the inverter. If the problem persists, seeking assistance from the manufacturer’s technical support is recommended.

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Operation Guide for LS Electric VFD LSLV-S100 Series User Manual

  1. Introduction to VFD Panel Functions
    Panel Composition
    The panel of the LS Electric VFD LSLV-S100 series consists of the following main parts:
LS S100 VFD Operation Panel Function Diagram

Display: Shows operating status, parameter information, fault indications, etc.
Keys:
RUN: Forward start key; pressing it starts the VFD in forward rotation.
REV: Reverse start key; pressing it starts the VFD in reverse rotation.
STOP/RESET: Stop/reset key; used to stop the VFD or reset faults.
Up/Down Arrow Keys: Used to increase or decrease values during parameter setting.
Left/Right Arrow Keys: Used to navigate between parameter groups or codes.
ENT: Enter key; used to confirm parameter settings or enter a function menu.
ESC: Multi-function key; can be set to move to the initial position, jog operation, switch between local/remote operation, etc.
SET/RUN Indicator: Indicates whether the VFD is in setting mode or running status.
FWD/REV Indicators: Indicate whether the VFD is in forward or reverse rotation, respectively.
Accessing Function Menus
Navigating Parameter Groups: Use the left/right arrow keys to move between different parameter groups.
Parameter Setting: Enter a parameter group, use the up/down arrow keys to select a specific parameter, press ENT to enter editing mode, and press ENT again to confirm the setting.
Jog Operation: If set to jog mode, press the ESC key, and then use the RUN and REV keys for jog operation.

  1. Terminal Start and Potentiometer Speed Control
    Wiring Instructions
    To achieve terminal start and potentiometer speed control, wire as follows:

Forward Start Terminal: Connect the forward start signal (e.g., FX terminal) of the control circuit to the P1 (or specified) terminal of the VFD.
Reverse Start Terminal: Connect the reverse start signal (e.g., RX terminal) of the control circuit to the P2 (or specified) terminal of the VFD.
Stop Terminal: Connect the stop signal of the control circuit to one of the multifunction input terminals of the VFD (e.g., a terminal set for stop function).
Potentiometer Wiring: Connect the three terminals of the potentiometer to the V1 terminal (voltage input), GND (ground), and VR terminal (reference voltage) of the VFD, respectively.
Parameter Setting
Operation Command Method: In the drive group (dr), set the drv parameter to Fx/Rx-1 or Fx/Rx-2 to select the terminal start mode.
Frequency Setting Method: In the basic function group (bA), set the Freq Ref Src parameter to V1 to select potentiometer speed control.
Multifunction Terminal Setting: In the input terminal function group (In), set terminals such as P1, P2 for forward and reverse start functions, and set the required stop terminal for stop function.

  2. VFD Initialization Setting
    To initialize VFD parameters, follow these steps:
LS Power VFD LSLV-S100 Series Control Terminal Diagram

Enter the drive group (dr) parameters.
Locate the dr.93 parameter (parameter initialization).
Press ENT to enter editing mode.
Use the up/down arrow keys to set the value to 9 (full initialization).
Press ENT again to confirm the setting.
The VFD will restart and apply the default parameter settings.

  1. Fault Code Analysis and Solutions
    Reading Fault Codes
    When a fault occurs in the VFD, a corresponding fault code will be displayed. You can view the fault code on the display of the panel or enter the protection function group (Pr) to view detailed fault information through related parameters.

Common Fault Codes and Solutions
OC (Overcurrent): Check if the motor is overloaded, if the motor cable is short-circuited, or if the output terminals have poor contact.
OV (Overvoltage): Check if the input voltage is too high, if the deceleration time is too short, or if the braking resistor is functioning properly.
UV (Undervoltage): Check if the input power supply is stable and if the voltage is within the allowed range.
OH (Overheat): Check if the ambient temperature around the VFD is too high or if the cooling fan is working normally.
EF (External Fault): Check if the external control circuit is normal or if there is an external fault signal input.
Solutions typically include adjusting parameter settings (e.g., increasing deceleration time, setting appropriate current limits, etc.), checking and repairing wiring issues, and replacing faulty components. When dealing with faults, always disconnect the power supply of the VFD to ensure safety.

This operation guide covers the main panel functions, wiring and parameter settings for terminal start and potentiometer speed control, initialization settings, and fault code analysis and solutions of the LS Electric VFD LSLV-S100 series. We hope this guide helps you better use and maintain this series of VFDs.

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Guide for the User Manual of Haishida HSD260 Series VFD

I. Introduction to the Operation Panel Functions

The Haishida HSD260 series VFD’s operation panel offers a variety of functions, enabling users to conveniently set, monitor, and control the VFD’s operation. The following are the main function introductions of the operation panel:

HSD260 VFD Operation Panel Function Diagram
  1. Display Settings

To set the display to show actual current instead of frequency, you need to access the parameter setting interface via the PRG key and adjust the relevant function codes. The specific steps are as follows:

Enter parameter settings: Press the PRG key to enter the P-group function parameter setting interface.
Select display parameter: Use the ▲ (increment) and ▼ (decrement) keys to find and select the parameter you want to display, such as U0-04 (output current).
Confirm and exit: Press the ENTER key to confirm your selection and exit the parameter setting interface via the PRG key. The operation panel will now display the value of the selected parameter.

  1. Start/Stop Operations

Start: Press the RUN key to start the VFD. If the command source (P0-02) is set to the operation panel, pressing the RUN key will start the VFD.
Stop: Press the RUN key again to stop the VFD. If the VFD is in a fault state, pressing the RUN key can also reset the fault.

  1. Parameter Adjustment

Enter parameter settings: Press the PRG key and use the ▲ (increment) and ▼ (decrement) keys to select the function code you need to adjust.
Modify parameter values: Press the SHIFT key to select the digit you want to modify, then use the ▲ (increment) and ▼ (decrement) keys to adjust the parameter value.
Save and exit: After making changes, press the ENTER key to save the settings and exit the parameter setting interface via the PRG key.

HSD260 VFD Control Circuit Wiring Diagram

II. Terminal Start and Potentiometer Speed Control Wiring and Control Terminals

  1. Terminal Start

To achieve terminal start, you need to correctly wire the control terminals and set the corresponding function codes. Below is a simple example of three-wire start wiring:

Wiring Example:
DI1 (Forward Start): Connect to the start button (normally open)
COM: Common terminal
DI2 (Stop): Connect to the stop button (normally closed)

Parameter Settings:
P0-02: Command source selection, set to 1 (terminal command channel)
P4-00: DI1 terminal function selection, set to 1 (forward operation)
P4-01: DI2 terminal function selection, set to 9 (fault reset)
P4-11: Terminal command mode, set to 2 (three-wire mode)

  1. Potentiometer Speed Control

When using a potentiometer for speed control, you need to correctly wire the potentiometer to the VFD’s analog input terminals and set the corresponding function codes. Below is an example of potentiometer speed control wiring:

Wiring Example:
+10V: Connect to the variable resistor terminal of the potentiometer
AI1: Connect to the other end of the potentiometer
GND: Connect to the common terminal of the potentiometer

Parameter Settings:
P0-03: Main frequency source selection, set to 2 (AI1)
Ensure the potentiometer’s resistance range matches the VFD’s input requirements

err18 fault

III. VFD Fault Analysis and Solutions

  1. ERR01: Inverter Unit Protection

Fault Analysis: This fault is usually caused by short circuits in the VFD’s output circuit, excessively long motor and VFD wiring, or overheated modules.
Solution:
Check and eliminate peripheral faults.
Install reactors or output filters.
Check for blocked air ducts and ensure the fan is working properly.
Ensure all connections are properly inserted.
If the problem persists, seek technical support.

  1. ERR02: Acceleration Overcurrent

Fault Analysis: This fault may be caused by grounding or short circuits in the VFD’s output circuit, vector control without motor parameter tuning, or too short an acceleration time.
Solution:
Eliminate peripheral faults.
Perform motor parameter tuning.
Increase the acceleration time.
Adjust the manual torque boost or V/F curve.
Check that the voltage is within the normal range.

  1. ERR05: Acceleration Overvoltage

Fault Analysis: This fault may be caused by excessively high input voltage, external forces dragging the motor during acceleration, or too short an acceleration time.
Solution:
Adjust the voltage to the normal range.
Eliminate external forces or install braking resistors.
Increase the acceleration time.
Install braking units and resistors.

  1. ERR10: VFD Overload

Fault Analysis: This fault is usually caused by excessive load or undersized VFD selection.
Solution:
Reduce the load and check the motor and mechanical condition.
Select a VFD with a higher power rating.

  1. ERR15: External Device Fault

Fault Analysis: This fault is usually caused by external fault signals input through multifunction terminals DI.
Solution:
Reset the operation.
Check and eliminate faults in external devices.

  1. ERR18: Current Detection Fault

Fault Analysis: This fault may be caused by abnormal Hall devices or drive boards.
Solution:
Replace the Hall devices.
Replace the drive board.

By following this guide, you should be able to better understand and utilize the Haishida HSD260 series VFD. If you encounter any unresolved issues, it is recommended to contact Rongji Electromechanical Technology Co., Ltd. for technical assistance.

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EV510 VFD User Manual and Operation Guide for Oulu

I. Introduction to Operation Panel Functions

Schematic diagram of EV510 VFD operation panel
  1. Panel Diagram and Indicator Descriptions
    Panel Diagram: The VFD operation panel typically includes a display screen, confirm button, stop/reset button, potentiometer adjustment, multifunction button, menu button, function indicators, run button, increase/decrease buttons, and shift button.
    Indicator Status:
    RUN/TUNE: Light off indicates stop, light on indicates operation.
    FWD/REV: Light off indicates normal operation, light on indicates reverse operation.
    TRIP: Light off indicates normal operation, slow flashing indicates motor self-learning (1 time/second), fast flashing indicates fault (4 times/second).
  2. Setting to Display Actual Speed Instead of Frequency
    To display actual speed instead of frequency, the monitoring parameter needs to be adjusted.
    Enter the parameter setting interface through the operation panel, locate the d0-19 feedback speed (Hz) function code, and set its value to the relevant parameter for displaying actual speed. The specific parameter value may vary depending on the VFD model and settings. Please refer to the function parameter table and monitoring parameter summary in the manual.
  3. Start, Stop, and Parameter Adjustment Button Operations
    Start: Press the run button (RUN) to start the VFD.
    Stop: Press the stop/reset button (STOP/RESET) to stop the VFD operation. In fault state, this button can also be used for reset.
    Adjust Parameters:
    Press the menu button (MENU) to enter the parameter setting menu.
    Use the increase/decrease buttons and shift button to select the parameter to be adjusted.
    Press the confirm button to enter the parameter modification state, then use the increase/decrease buttons and shift button again to adjust the parameter value.
    After adjustment, press the confirm button to save the settings and exit.
EV510 VFD physical picture

II. Terminal Start and Potentiometer Speed Adjustment Wiring and Parameter Settings

  1. Terminal Start Wiring
    Control Terminals: Typically, digital input terminals such as S1 (forward operation) and S2 (reverse operation) are used for start control.
    Wiring Method: Connect external control signals (such as buttons, relay contacts, etc.) to S1 and the common terminal COM for forward start; connect to S2 and the common terminal COM for reverse start.
  2. Potentiometer Speed Adjustment Wiring
    Control Terminals: Use analog input terminals such as AI1 and AI2 for potentiometer speed adjustment.
    Wiring Method: Connect the sliding end of the potentiometer to the analog input terminal (such as AI1), and connect the fixed ends to +10V and GND (common ground) respectively.
  3. Parameter Settings
    Start Parameters:
    Set P0-02 operation command channel to 1 (terminal command channel).
    According to the wiring, set P4-00 S1 terminal function selection to 1 (forward operation), and P4-01 S2 terminal function selection to 2 (reverse operation).
    Speed Adjustment Parameters:
    Set P0-03 main frequency source A command selection to 2 (AI1), indicating that AI1 terminal is used for frequency setting.
    According to the potentiometer wiring and speed adjustment requirements, set parameters such as P4-13 AI curve 1 minimum input, P4-15 AI curve 1 maximum input, P4-14 AI curve 1 minimum input corresponding setting, and P4-16 AI curve 1 maximum input corresponding setting to define the correspondence between potentiometer output voltage and frequency.
EV510E VFD Sstandard wiring diagram

III. VFD Fault Analysis and Solution

  1. Common Faults and Causes
    Overcurrent Fault: May be caused by motor stalling, overload, improper parameter settings, etc.
    Overvoltage Fault: May be caused by excessive input voltage, short deceleration time, damaged braking resistor, etc.
    Undervoltage Fault: May be caused by insufficient input voltage, power supply failure, etc.
    Overheating Fault: May be caused by high ambient temperature, poor VFD heat dissipation, excessive load, etc.
  2. Solutions
    Overcurrent Fault: Check if the motor is stalled or overloaded, adjust the load or increase the VFD capacity; check if the parameter settings are reasonable, such as acceleration time, deceleration time, etc.
    Overvoltage Fault: Check if the input voltage is normal, adjust the deceleration time or add a braking resistor; check if the braking resistor is damaged or poorly wired.
    Undervoltage Fault: Check if the input power supply is normal, and ensure that the power supply voltage is within the allowable range.
    Overheating Fault: Improve the VFD heat dissipation conditions, such as increasing ventilation, cleaning dust, etc.; reduce the load or increase the VFD capacity; check if the parameter settings are reasonable, such as carrier frequency, etc.
  3. Fault Troubleshooting Steps
    Observe Indicators: Initially judge the fault type based on the indicator status.
    View Fault Records: Enter the VFD fault record interface to view the type and occurrence time of the most recent fault or faults.
    Check External Wiring: Ensure that all external wiring is correct and free from looseness or short circuits.
    Adjust Parameter Settings: According to the fault type and cause, appropriately adjust the VFD parameter settings.
    Contact After-sales Service: If the fault cannot be resolved independently, contact the VFD manufacturer or professional maintenance personnel for repair.

Through the above steps, users can effectively use the Oulu EV510 VFD, including operation panel functions, terminal start and potentiometer speed adjustment wiring and parameter settings, as well as fault analysis and solutions.

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Operating Instructions for Invt IPE100 Series Engineering Inverter Manual

I. Introduction to Operation Panel Functions

The Invt IPE100 Series Engineering Inverter is equipped with an intuitive and user-friendly operation panel, featuring the following key functions:

  1. PRC/ESC (Program/Escape Key): Used to enter or exit the primary menu and delete quick parameters. This key facilitates menu navigation and parameter management during programming or debugging.
  2. DATA/ENT (Enter Key): Navigates through menu screens level by level and confirms parameter settings. It is essential for making and modifying parameter settings.
  3. ↑ (Up Key): Increments data or function codes. Used to conveniently increase numerical values when adjusting parameters.
  4. ↓ (Down Key): Decrements data or function codes. Corresponds to the Up Key for decreasing parameter values.
  5. 》/SHIFT (Shift Key): Cycles through display parameters in both stop and run display modes. During parameter modification, it selects specific digits for editing, providing flexibility in parameter editing.
  6. RUN (Run Key): Initiates inverter operation in keyboard control mode. It is a primary control for the inverter’s running state.
  7. STOP/RST (Stop/Reset Key): Halts inverter operation during runtime. In fault alarm states, it resets faults regardless of function code P7.04 settings.
  8. QUICK/JOG (Quick/Jog Key): Its function is determined by function code P7.03. When P7.03=0, it activates jogging mode (keyboard control only); when P7.03=1, it toggles between forward and reverse rotation (keyboard control only). Simultaneous pressing of RUN and STOP/RST keys initiates a free stop.
Operation Panel Function Diagram of Invt IPE100 Inverter

II. Terminal Start and External Potentiometer Speed Control Setup

  1. Parameter Settings:
    • P0.00=2: Selects V/F control mode, suitable for most general-purpose motors.
    • P0.01=1: Enables terminal command mode for inverter start/stop control.
    • P0.02=1: Selects analog input A1 for speed command, allowing speed regulation via an external potentiometer.
  2. Motor Parameter Input:
    • Enter the following parameters based on the motor nameplate: P2.00 (motor type), P2.01 (motor rated power), P2.02 (motor rated frequency), P2.03 (motor rated speed), P2.04 (motor rated voltage), and P2.05 (motor rated current).
  3. Wiring Instructions:
    • Connect one end of the start switch (or stop switch) to inverter terminal S1 and the other end to terminal COM (ground). Shorting S1 and COM activates the inverter.
    • Connect the wiper of the potentiometer to terminal AI1, and the potentiometer ends to terminals +10V and GND, respectively. Turning the potentiometer clockwise accelerates the inverter, while turning it counterclockwise decelerates it.
External Wiring Diagram of Invt IPE100 Inverter

III. Inverter Fault Code Analysis and Troubleshooting

  1. Output Faults (OUT1, OUT2, OUT3): Correspond to faults in phases U, V, and W, respectively. Causes may include rapid acceleration, inverter unit issues, or IGBT internal damage. Check for strong interference from peripheral devices and ensure proper motor and cable connections.
  2. Overcurrent Faults (OC1, OC2, OC3): Correspond to overcurrent during acceleration, deceleration, and constant speed operation, respectively. Check for excessive motor load, motor blockage, or improper parameter settings.
  3. Overvoltage Faults (OV1, OV2, OV3): Correspond to overvoltage during acceleration, deceleration, and constant speed operation, respectively. Verify the power supply voltage and ensure proper functioning of braking resistors and braking units.
  4. Undervoltage Fault (UV): Indicates that the bus voltage is below the set value. Check the input power stability and power line connections.
  5. Overload Faults (OL1, OL2): Correspond to motor overload and inverter overload, respectively. Verify motor load and inverter cooling conditions.
  6. Phase Loss Faults (SPI, SPO): Correspond to input and output phase loss, respectively. Inspect power and motor wiring connections and motor condition.

These are the basic operating instructions and common fault code explanations for the Invt IPE100 Series Engineering Inverter. In practical applications, please adjust parameter settings and troubleshoot faults according to specific situations.

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User Guide for Inovance Inverters MD280 Series Manual

I. Introduction

The Inovance MD280 series inverter is a powerful and user-friendly universal inverter widely applied in various automation equipment such as textile, papermaking, and machine tools. This guide will detail the operation panel functions, terminal start/stop configuration, external potentiometer speed regulation settings, and fault code troubleshooting for the MD280 inverter.

Function diagram of Inovance Inverters MD280 operation panel

II. Operation Panel Functions and Usage

The MD280 inverter’s operation panel serves as the primary interface between the user and the inverter, providing functionality such as run, stop, reset, and speed adjustment.

  • RUN Key: Pressing this key starts the inverter.
  • STOP/RES Key: Used to stop the inverter or reset it in case of a fault.
  • Multi-Function Key (MF.K): Depending on the setting, this key can switch command sources, toggle between forward and reverse rotation, or initiate jogging.
  • Speed Adjustment Potentiometer (if equipped): Rotating the potentiometer directly adjusts the inverter’s output frequency for speed regulation.

The LED display on the panel shows the inverter’s operating status, frequency, current, and other parameters, facilitating real-time monitoring.

Inovance Inverters MD280 Control Circuit Wiring Diagram

III. Terminal Start/Stop and External Potentiometer Speed Regulation

The MD280 inverter supports start/stop control through external terminals and speed regulation using an external potentiometer. Here are the detailed setup and wiring instructions:

1. Terminal Start/Stop Configuration

First, set the control command source through the inverter parameters. Navigate to the inverter parameter settings and set F0-00 to “1” (terminal command channel). Then, configure the DI terminal functions using the F2 group parameters, for example:

  • Set F2-00 to “1” to assign DI1 as the forward run terminal.
  • Set F2-01 to “2” to assign DI2 as the reverse run terminal.
  • Set F2-04 to “8” to assign DI4 as the free stop terminal.

When wiring, connect the external start, stop buttons, or contactors to the DI1, DI2, and DI4 terminals (depending on specific requirements), ensuring the common terminals are connected to the inverter’s COM terminal.

Inovance Inverters MD280 Label

2. External Potentiometer Speed Regulation

The MD280 inverter supports analog speed regulation via the AI2 terminal using an external potentiometer. First, set the J2 jumper on the control board to “V” (voltage input mode). Then, connect the three pins of the external potentiometer to AI2, GND, and +10V (or an equivalent voltage source from an external power supply).

In the parameter settings, ensure F0-01 is set to “1” (AI1 analog input) or “2” (AI2 analog input), depending on which AI terminal the potentiometer is connected to. Additionally, configure the AI input minimum and maximum values, along with the corresponding output frequency range, using parameters F2-09 to F2-12.

IV. Fault Code Meanings and Solutions

During operation, the MD280 inverter may encounter various faults and display corresponding fault codes on the LED screen. Here’s an explanation and solution for ERR02:

ERR02: Acceleration Overcurrent

  • Meaning: The inverter detects an overcurrent during acceleration.
  • Possible Causes:
    • Excessive motor load.
    • Too short acceleration time setting.
    • Improper V/F curve configuration.
  • Solutions:
    • Check if the motor load exceeds the rated capacity and reduce the load if necessary.
    • Increase the acceleration time (adjust parameter F0-09).
    • Optimize the V/F curve settings by adjusting parameters like F1-05 (torque boost).
    • Inspect the motor and connecting cables for short circuits or ground faults.

By following these steps, you can effectively resolve the ERR02 fault encountered during MD280 inverter operation, ensuring stable equipment performance.

Inovance Inverters experiences Error02 fault

V. Conclusion

The Inovance MD280 series inverter, with its robust functionality and user-friendly operation, holds a significant position in various automation equipment. This guide aims to enhance your understanding of the inverter’s operation panel functions, terminal start/stop and external potentiometer speed regulation settings, as well as fault code troubleshooting. By mastering these concepts, you can fully leverage the inverter’s performance advantages, boosting production efficiency.

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Analysis and Solution for OC Alarm Code in ZONCN Inverter NZ200 Series

In industrial automation control systems, inverters serve as critical devices for power transmission control, and their stability and reliability are directly related to the continuous operation of production lines. The Zhongchen Inverter NZ200 series, as a high-performance option, may encounter specific alarm codes during operation, particularly the OC (Over-Current) alarm.

Normal display content on the operation panel when ZONCN VFD is working

For short-duration, high-current OC alarms in the NZ200 series, the primary causes generally stem from issues within the current detection circuit of the drive board or potential damage to the module itself. These alarms may recur even after a reset due to underlying issues. Typically, the root causes can be attributed to the following scenarios:

  1. Excessively Long Motor Cables: Long motor cables can introduce excessive leakage current, potentially triggering the OC alarm.
  2. Inadequate Cable Selection: Choosing marginal cable types can also result in higher leakage currents, especially under high load conditions.
  3. Loose Cable Connections and Damage: Loose cable connections or damaged cables can cause arcing effects when the load current surges, triggering the OC protection mechanism.

Recommended Solutions:

ZONCN inverter OC3 alarm
  • Inspect and Shorten Motor Cables: Review the cable length and ensure it meets the manufacturer’s recommendations. If possible, shorten the cable length to reduce leakage current.
  • Upgrade Cable Quality: Replace existing cables with higher-quality, appropriately rated ones to minimize leakage current issues.
  • Tighten Cable Connections and Check for Damage: Thoroughly inspect all cable connections for tightness and integrity. Replace any damaged cables immediately.
  • Monitor and Adjust Load Conditions: Keep track of load changes and adjust inverter settings accordingly to avoid excessive current surges.
  • Inspect and Replace Drive Board/Module: If the issue persists despite the above measures, consider replacing the drive board or entire inverter module, as the internal circuitry may have been damaged.

By addressing these potential causes and implementing preventive maintenance practices, operators can significantly reduce the likelihood of OC alarms in their Zhongchen Inverter NZ200 series, ensuring the smooth and reliable operation of their industrial automation systems.

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Analysis and Solution of INI Alarm in ZONCN VFD NZ200T

I. Analysis of INI Alarm Causes

Image of zoncn inverter displaying INI alarm
  1. Literal Interpretation of INI Alarm
    • In VFDs, the “INI” alarm likely indicates issues or errors encountered during the device’s initialization process. This can stem from various reasons, including improper parameter settings, hardware failures, firmware issues, or external device connection errors.
    • For VFDs like the NZ200T, which employs open-loop vector control, the “INI” alarm may signify the VFD’s failure to correctly complete its initialization process upon startup or reset. This could result from unsatisfied specific hardware or software conditions, leading to the interruption or failure of the initialization process.
  2. Initial Position Error
    • The INI alarm in ZONCN VFDs typically indicates an initial position error. This may occur when the VFD fails to accurately detect the motor’s initial position at startup, preventing the control program from executing subsequent commands accurately. Initial position errors can arise from various factors, including incorrect motor parameter settings, current circuit faults, or signal transmission issues.
  3. Improper Motor Parameter Settings
    • The NZ200T VFD requires accurate setting of various motor parameters, such as rated voltage, rated current, and power factor. Inaccurate settings, particularly a low rated current setting, will prevent the VFD from effectively adjusting to the motor’s actual load conditions, thereby triggering the INI alarm.
  4. Current Matching Fault or Signal Transmission Issue
    • The NZ200T VFD operates in open-loop vector control mode, necessitating precise current detection for accurate model analysis. Damage to the current transformer or issues with the signal transmission lines, such as poor contact or signal interference, will affect the VFD’s accurate determination of the motor’s position, subsequently triggering the INI alarm.
  5. Control Mode Mismatch
    • The NZ200T VFD is designed for use with synchronous motors. When connected to a standard asynchronous motor or if the control mode is not correctly set, the INI alarm may also appear. This is because different types of motors exhibit distinct operational characteristics and control requirements, necessitating corresponding adjustments to the VFD’s control strategy based on the motor type.

II. Solutions

  1. Recheck Motor Parameters
    • Firstly, carefully verify the settings of all motor parameters, ensuring consistency with the data on the motor’s nameplate. Pay particular attention to key parameters such as rated current, which should be set according to the motor’s actual specifications to avoid INI alarms caused by improper parameter settings.
  2. Inspect Current Transformer and Signal Transmission Lines
    • Check the current transformer for damage or looseness, and replace it if necessary. Simultaneously, inspect the connection of the current transformer’s signal transmission lines to ensure good contact and absence of signal interference. If aged or damaged lines are found, promptly replace them with new ones.
  3. Adjust Control Mode
    • If the NZ200T VFD is connected to a standard asynchronous motor, adjust the control mode to V/F control mode. Refer to the VFD user manual for specific setting methods: set parameter P0-02 to 2 and P1-04 to 50 (V/F control). This allows the VFD to directly control the standard asynchronous motor by adjusting the frequency for speed regulation, without altering other parameters. Additionally, ensure that the VFD’s software version matches the motor type to avoid control issues due to software incompatibility.
  4. Seek Professional Technical Support
    • If the above methods fail to resolve the INI alarm issue, it is recommended to contact longi’s technical support team or professional maintenance personnel for fault troubleshooting and repair. When contacting technical support, provide a detailed description of the equipment’s operating environment, operation process, and alarm phenomena to enable technicians to quickly identify the problem and provide solutions.

In summary, the causes of INI alarms in the NZ200T VFD are diverse and require case-by-case investigation and resolution. By reasonably setting parameters, regularly inspecting equipment status, and seeking professional technical support, the incidence of INI alarms can be effectively reduced, ensuring stable equipment operation.

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User Guide for Great Inverter VC8000 Series

I. Operation Panel Functions and Instructions

The operation panel of the Great Inverter VC8000 series serves as the primary interface for user interaction with the inverter. It mainly consists of a display area and functional keys. Below are the main functions of the operation panel:

Schematic diagram of Greet VFD VC8000 series operation panel
  1. Display Area
    • Digital Display: Shows the current working status, frequency setting value, operating parameters, and other information of the inverter.
    • Function Indicators:
      • FWD/REV: Forward/Reverse indicator. Light off indicates forward operation, light on indicates reverse operation.
      • RUN: Running indicator. Light off indicates stop, light on indicates running.
      • LOCAL/REMOT: Command source indicator. Light off indicates panel control, light on indicates terminal control, flashing indicates communication control.
      • TUNE/TC: Tuning/Torque Control/Fault indicator. Light off indicates normal operation, light on indicates torque control, slow flashing indicates tuning status, fast flashing indicates fault status.
  2. Functional Keys
    • PRG/Programming: Enters or exits the menu for parameter modification.
    • ENTER/Confirm: Enters the menu, confirms parameter settings.
    • ▲ Increment: Increments data or function codes.
    • ▼ Decrement: Decrements data or function codes.
    • < Shift: Selects parameter modification digits and display content.
    • RUN/Run: Starts the inverter.
    • STOP/RESET: Stops or resets the inverter.
    • MF/Multi-Function: Multi-function selection key, with specific functions determined by the P7-01 function code.

II. Wiring Instructions for Terminal Start/Stop and Potentiometer Debugging

Gelite VFD VC8000 series terminal wiring diagram
  1. Wiring Instructions
    • Start/Stop Control Wiring:
      • Start Terminal: Typically, the start signal is connected to DI1 (or another specified digital input terminal) and configured as a forward running command (e.g., P4-00=1).
      • Stop Terminal: Connected to DI2 (or another specified digital input terminal) and configured as a fault reset or stop command (e.g., P4-01=9).
    • Potentiometer Debugging Wiring:
      • If an external potentiometer is used for frequency adjustment, connect +10V and GND to the power terminals of the potentiometer, and connect the center tap to AI1 (analog input 1).
  2. Parameter Settings
    • To meet control requirements, set the following parameters:
      • P4-00: Set DI1 as the forward running command (e.g., set to 1).
      • P4-01: Set DI2 function according to needs, typically as fault reset or stop command.
      • AI1-related Parameters: Ensure AI1 is configured to receive frequency settings (e.g., set P0-03 to AI1).
      • Other Necessary Parameters: Set relevant parameters in P0 group (basic function parameters), P2 group (vector control parameters), etc., according to specific needs.

III. Fault Code Analysis and Solutions

When faults occur in the Gelite Inverter VC8000 series, fault codes prefixed with “ERR” will be displayed. Below are analyses and solutions for some common fault codes:

  1. ERR01 – Inverter Unit Protection
    • Cause: May be due to inverter overheating, short circuit, or drive board failure.
    • Solution: Check if the inverter module is overheating, check for short circuits in the motor and cables, and if the problem persists, contact the manufacturer for repair.
  2. ERR02/ERR03/ERR04 – Acceleration/Deceleration/Constant Speed Overcurrent
    • Cause: Excessive motor load, short acceleration time setting, output short circuit, etc.
    • Solution: Check the motor load, appropriately extend the acceleration time, and check for short circuits in the output circuit.
  3. ERR05 – Constant Speed Overvoltage
    • Cause: Excessive power supply voltage, abnormal braking unit, etc.
    • Solution: Check the power supply voltage and confirm if the braking unit is working normally.
  4. ERR08 – Control Power Fault
    • Cause: Abnormal control power, such as unstable voltage or power cut.
    • Solution: Check the control power supply voltage and ensure stable power supply.
  5. ERR19 – Overload
    • Cause: Motor operating under overload for an extended period.
    • Solution: Reduce the motor load and check for abnormalities in the mechanical parts.

Note: The above are only analyses and solutions for some fault codes. During actual use, please refer to the specific fault code manual for operation. For faults that cannot be resolved, please promptly contact longi technical support.

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​User Guide for Fuling VFD BD330 Series Manual

Operation Panel Key Descriptions:

Functional description of Fuling inverter BD330 operation panel
  • PRGM/ESC: Program setting and exit key. PRGM is used to enter programming mode or set parameters, while ESC is used to exit the current setting or return to the previous menu.
  • FUNCTION/DATA: Function selection and data key. FUNCTION is used to enter the function selection interface, and DATA is used to modify data values during parameter setting.
  • FORWARD/REVERSE: Forward and reverse control key. Controls the forward or reverse rotation of the motor.
  • JOG/>>: Jog and page turning key. JOG is used for jog control, and >> may be used for page turning or increasing parameter values (specific functions may vary depending on the model).
  • RUN: Run key. Controls the startup of the VFD.
  • STOP/RST: Stop and reset key. STOP is used to stop the VFD operation, and RST is used to reset the VFD and clear fault states.
  • UP/DOWN: Up and down adjustment key. Used to increase or decrease values during parameter setting.

Terminal Start/Stop and Potentiometer Debugging Wiring Instructions:

Terminal Start/Stop:

  • Parameter Setting: Ensure parameter F0.02 is set to 1, selecting terminal control mode.
  • Wiring Instructions:
    • Connect the external start signal to the S1 terminal of the VFD.
    • Short-circuit the S1 terminal with the common terminal DCM to send a start signal, causing the VFD to begin operation.
    • Disconnect the short-circuit between S1 and DCM to send a stop signal, causing the VFD to stop operation.

Potentiometer Debugging:

  • Parameter Setting: Ensure parameter F0.03 is set to 1, selecting external potentiometer speed adjustment mode.
  • Wiring Instructions:
    • Connect the center tap (sliding contact) of the potentiometer to the AVI terminal of the VFD.
    • Connect the two ends of the potentiometer to the 10V (or similar positive power supply) and ACM (or similar common terminal) of the VFD, respectively.
    • Adjust the position of the potentiometer to change the voltage value of the AVI terminal, thereby controlling the output frequency of the VFD.
Fuling inverter BD330 wiring diagram

Fault Code Analysis and Solutions:

Fault Codes:

  • E001: DC bus fault. Possible causes include abnormal input power, faulty bus capacitors, etc. Solution: Check if the power input is normal, inspect the bus capacitors for damage, and replace if necessary.
  • E002: Acceleration overvoltage. Possible causes include excessively short acceleration time, sudden load changes, etc. Solution: Adjust the acceleration time and check for load stability.
  • E003: Constant speed overvoltage. Similar to E002 but occurs during constant speed operation. Solution is the same.
  • E004: Acceleration overcurrent. Possible causes include motor stall, excessive load, etc. Solution: Inspect the motor and load conditions, reduce the load, or optimize motor operating conditions.
  • E005: Deceleration overcurrent. Possible causes include excessively short deceleration time, large load inertia, etc. Solution: Adjust the deceleration time and consider using a braking unit and braking resistor.

Please note that the above content is based on the information you provided. During actual operation, please refer to the VFD manual and related materials. If you have any questions, please contact Longi Electromechanical’s technical support or professional maintenance personnel promptly.