Why does the VLT FC 300 keep tripping the circuit breaker?
The circuit breaker might trip due to a phase to phase short, motor overload, or loose connections. Eliminate any shorts, perform a start-up test to verify the motor current is within specifications, and tighten any loose connections.
What to do if the motor is not running with my VLT Inverter Drive?
If the motor isn't running, several factors could be at play. Ensure the service switch is properly connected and the motor connection is secure. If you're using a 24 V DC option card, make sure line power is applied to run the unit. Also, check if the LCP is in Stop mode; if so, press [Auto On] or [Hand On]. Verify that a start signal is present and that the motor coast signal is not active (apply 24 V on terminal 27 or program this terminal to No operation). Finally, ensure the reference signal source is correctly configured.
How to fix a dark display on my VLT FC 300?
A dark or non-functional display can stem from several causes: missing input power (check the input power source), missing or open fuses or a tripped circuit breaker (follow the recommendations provided), no power to the LCP (replace the faulty LCP or connection cable), a short circuit on the control voltage or at the control terminals (wire the terminals properly), an incorrect LCP (use only LCP 101 or LCP 102), a wrong contrast setting (press [Status] + ?/? to adjust the contrast), a defective display (LCP) (replace the faulty LCP or connection cable). If none of these solutions work, the internal voltage supply or SMPS may be defective, and you should contact your supplier.
Why is my VLT FC 300 motor running in the wrong direction?
The motor might be running in the wrong direction because of a motor rotation limit, an active reversing signal, or a wrong motor phase connection. Program the correct settings, deactivate the reversing signal, or see section 3.7 Check Motor Rotation in this manual.
What causes a motor current imbalance in VLT FC 300 Inverter Drive?
A motor current imbalance greater than 3% can be due to a problem with the motor or its wiring, or with the adjustable frequency drive unit itself. Try rotating the output motor leads one position: U to V, V to W, W to U.
How to troubleshoot line power current imbalance on VLT FC 300 Inverter Drive?
A line power current imbalance greater than 3% may indicate a problem with the line power or the adjustable frequency drive unit. Try rotating the input power leads into the drive one position: A to B, B to C, C to A.
Why is the display on my VLT FC 300 Inverter Drive intermittent?
An intermittent display could be caused by an overloaded power supply (SMPS) due to improper control wiring or a fault within the adjustable frequency drive. If the display stays lit, check the wiring for shorts or incorrect connections. If the display continues to cut out, follow the procedure for a dark display.
Why is the motor speed unstable on my VLT Inverter Drive?
Unstable motor speed can be caused by incorrect parameter settings. Check settings in parameter group 1-6* Analog I/O mode. For closed-loop operation, check settings in parameter group 20-0* Feedback.
What causes a motor to run rough with VLT FC 300?
A motor running roughly may be due to over-magnetization. Check the motor settings in parameter groups 1-2* Motor data, 1-3* Adv motor data, and 1-5* Load indep. setting.
What to do if the motor will not brake using VLT FC 300?
If the motor won't brake, the brake parameters might be set incorrectly, or the ramp-down times might be too short. Check parameter group 2-0* DC brake and 3-0* Reference limits.
General| Input Voltage | 380-480 V AC |
|---|---|
| Power Range | 0.25 kW |
| Control Method | VVCplus |
| Communication Protocols | Modbus RTU |
| Protection Class | IP20, IP21, IP55 |
| Protection Features | Overvoltage, undervoltage, overcurrent, short circuit, overtemperature |
| Cooling Method | Forced convection |
| Ambient Temperature | -10 to +50 °C |
| Storage Temperature | +70 °C |
| Relative Humidity | 5-95% (non-condensing) |
| Altitude | Up to 1000 m |
| Enclosure | IP20 |
Warning about high voltage when connected to AC power, requiring qualified personnel.
Warning about unexpected motor starts due to external signals or cleared faults.
Warning about charged capacitors needing time to discharge before service.
Explanation of warning and caution symbols used in the manual for hazard identification.
Details the manual's scope for installation, startup, and operation of the drive.
Lists other resources for advanced drive functions, programming, and system design.
Explains the function of an adjustable frequency drive in controlling motor speed/torque.
Describes internal components of the drive with a block diagram.
Details drive frame sizes and their corresponding power ratings.
Checks for suitable ambient conditions, mounting strength, and accessibility for operation.
Verifies unit model, voltage ratings, motor compatibility, and current ratings.
Covers physical mounting requirements, including cooling airflow.
Details wiring procedures for motor, AC line power, and control/communication.
Outlines general wiring, protection, and grounding requirements for safe operation.
Emphasizes proper grounding for operator safety and national/local code compliance.
Instructions for safely connecting the motor to the drive's output terminals.
Details connecting the AC power supply to the drive's input terminals.
Covers wiring for control signals, serial communication, and access to terminals.
Summarizes functions and default settings for various control terminals.
Step-by-step guide for connecting wires to control terminals.
Best practices for shielding control and communication cables to prevent noise.
Details the use of jumpers for specific operations and default settings.
Instructions for setting analog input signal types using switches.
How to control electro-mechanical brakes for hoisting applications.
Connects RS-485 wiring and provides basic setup parameters for communication.
Explains the Safe Stop function (STO) and its safety levels and activation.
Procedure for testing the safe stop installation after setup and modifications.
Critical safety checks and verification of connections before applying power.
Steps for safely applying power to the unit and initial checks.
Introduction to programming the drive for basic operation using parameters.
Steps to configure parameters for asynchronous motors.
Setup procedure specific to Permanent Magnet (PM) motors.
Procedure to measure motor characteristics for optimal compatibility.
Verifies motor rotation direction before starting operation.
Checks encoder feedback and connection if an encoder option is used.
Procedure to test drive operation using the local control panel.
Final procedure after wiring and programming for system startup.
Describes the display and keypad interface on the drive for user interaction.
Details the layout and functional groups of the Local Control Panel (LCP).
How to customize the information displayed on the LCP for user applications.
Explains the function of the LCP menu keys for navigation and setup.
Describes navigation keys for programming, cursor movement, and speed control.
Explains the function of the LCP operation keys for starting, stopping, and modes.
How to back up drive parameter settings to LCP and copy to other drives.
Steps to upload drive parameter data to the LCP memory.
Steps to download parameter data from the LCP to the drive.
Procedures to reset the drive to factory default settings.
Steps for performing the recommended drive initialization.
Steps for performing manual drive initialization.
Overview of drive programming using parameters via LCP or PC software.
Example of programming for open-loop control with analog signal input.
Examples of programming specific control terminals for various functions.
Default parameter settings based on regional selection.
Explains the organization of parameters for drive setup and configuration.
Lists parameters by group for navigation and reference.
Using PC software for drive programming, storage, and transfer.
Introduction to quick reference examples for common applications.
Provides wiring and parameter examples for common drive applications.
Explains the status messages displayed on the LCP for operational mode and status.
Defines status messages, operation modes, reference sites, and status conditions.
Explains how the drive monitors system indicators and potential external issues.
Categorizes warnings, alarms, and trips, and how they are indicated and cleared.
Explains how warnings and alarms are displayed on the LCP and via status lights.
Defines specific warnings/alarms, causes, and troubleshooting procedures.
Troubleshooting steps for common issues during startup and initial operation.
Troubleshooting steps for a dark or non-functional display on the LCP.
Troubleshooting steps for an intermittent or flickering display.
Troubleshooting steps when the motor fails to start or run.
Troubleshooting steps for incorrect motor rotation direction.
Troubleshooting steps for motor failing to reach maximum speed.
Troubleshooting steps for unstable motor speed.
Troubleshooting steps for rough motor running or vibration.
Troubleshooting steps for when the motor fails to brake.
Troubleshooting steps for open power fuses or tripped circuit breakers.
Troubleshooting steps for line power current imbalance issues.
Troubleshooting steps for motor current imbalance issues.
Lists specifications that vary based on the drive's power rating.
Provides general technical specifications including voltage, frequency, and torque.
Specifications for pulse and encoder input signals.
Specifications for digital and pulse outputs.
Specifications for analog outputs.
Specifications for the 24 V DC output from the control card.
Specifications for the 10 V DC output from the control card.
Specifications for RS-485 serial communication.
Specifications for USB serial communication.
Specifications for programmable relay outputs.
Recommended cable lengths and cross-sections for control cables.
Performance characteristics of the control card.
Speed control range in open-loop mode.
Speed control range in closed-loop mode.
Environmental specifications including enclosure, vibration, and humidity.
Information on recommended fuses and circuit breakers for protection.
Recommendation to use fuses/breakers for protection against internal breakdown.
General recommendations for fuse selection and types.
Requirements for CE compliance regarding fuses and circuit breakers.
Provides torque specifications for various terminals during connection.
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