To Next PageTo Next PageWhy is my YASKAWA Varispeed f7 showing internal braking transistor fault?
If the YASKAWA Inverter reports an internal braking transistor fault, indicating that the braking transistor is not operating properly, it could be due to a damaged braking transistor or faulty Inverter control circuits. Try turning the power supply off and on. If the fault persists, replace the Inverter.
What to do if YASKAWA Varispeed f7 Inverter displays motor overheating fault?
If a YASKAWA Inverter shows a motor overheating fault, and the Inverter will stop according to the setting of L1-04, it means that the motor has overheated. Check the load size and the duration of acceleration, deceleration, and cycle times. Also, check the V/f characteristics and the motor temperature input on terminals A2 and A3. Finally, check the setting of E2-01 (motor rated current).
How to troubleshoot motor overheating alarm on YASKAWA Varispeed f7 Inverter?
If the YASKAWA Inverter triggers a motor overheating alarm, indicating the Inverter will stop or continue to operate according to the setting of L1-03, it signifies that the motor has overheated. You should check the size of the load and the length of the acceleration, deceleration, and cycle times. Also, check the V/f characteristics and the motor temperature input on terminals A2 and A3. Finally, check the setting of E2-01 (motor rated current).
What to do if YASKAWA Varispeed f7 Inverter shows OC Over Current?
If the YASKAWA Inverter displays an OC Over Current error, it could be due to several reasons. The output phase-to-phase might be shorted, the motor could be shorted, the rotor might be locked, the load might be too heavy, or the accel/decel time might be too short. It's also possible that a contactor on the Inverter output has opened or closed, or that a special motor or a motor with a rated current larger than the Inverter’s output current is used. To resolve this, remove the motor and run the Inverter without it. Also, check the motor for a phase-to-phase short and verify the accel/decel times (C1-nn). Check the Inverter for a phase-to-phase short at the output.
What to do for control power fault in YASKAWA Varispeed f7 Inverter?
If a YASKAWA Inverter detects a control power fault, where the control power supply voltage has dropped, first fix the wiring. If this doesn't solve the issue, try turning the power supply off and on. If the fault persists, replace the Inverter.
What to do if YASKAWA Varispeed f7 shows inverter overload?
If the YASKAWA Inverter overload protection function has operated based on the internal electronic thermal value, possible causes include a load that is too heavy, acceleration, deceleration, and cycle times that are too short. You should check the size of the load and the length of the acceleration, deceleration, and cycle times. The V/f characteristics voltage may also be too high or too low, so check the V/f characteristics. If these are not the cause, the Inverter capacity might be too low, and you should replace the Inverter with one that has a larger capacity.
What causes main circuit undervoltage in YASKAWA Inverter?
If the YASKAWA Inverter's main circuit DC voltage is below the Undervoltage Detection Level, it could be due to an open-phase with the input power supply, a momentary power loss, loose wiring terminals for the input power supply, excessive voltage fluctuations in the input power supply, or a fault in the surge prevention circuit. Reset the fault after correcting its cause.
Why is my YASKAWA Varispeed f7 showing motor overload?
If the YASKAWA Inverter's motor overload protection function has operated based on the internal electronic thermal value, the load might be too heavy, or the acceleration, deceleration, and cycle times are too short. Check the load size and the duration of acceleration, deceleration, and cycle times. Also, the V/f characteristics voltage may be too high or too low, so check the V/f characteristics. Finally, verify that the Motor Rated Current (E2-01) and Motor 2 Rated Current (E4-01) settings are correct.
What causes ground fault in YASKAWA Varispeed f7?
If the ground fault current at the YASKAWA Inverter output exceeds approximately 50% of the Inverter rated output current, it signifies a ground fault at the Inverter output. This can be caused by motor burn damage, worn insulation, or a damaged cable. You should reset the fault after correcting its cause.
What to do if the fuse is blown in YASKAWA Varispeed f7 Inverter?
If the fuse in the YASKAWA Inverter's main circuit is blown, it indicates that the output transistor has failed due to a short-circuit or ground fault at the Inverter output. After correcting the cause, replace the Inverter.
General| Series | Varispeed F7 |
|---|---|
| Input Frequency | 50/60 Hz |
| Output Frequency | 0-400 Hz |
| Overload Capacity | 150% for 60 seconds |
| Type | AC Inverter |
| Output Voltage | 0 to Input Voltage |
| Control Method | V/f Control |
| Switching Frequency | 2 kHz to 15 kHz |
| Braking Unit | Built-in or External |
| Communication | RS-485 |
| Protection Functions | Overcurrent, Overvoltage |
| Protection Class | IP20 |
| Cooling Method | Fan Cooling |
| Ambient Temperature | -10 to +50°C |
Details on precautions to avoid injury or damage during installation, wiring, and operation.
General guidance on handling the manual, product, and potential changes.
Overview of Varispeed F7 applications and available models.
Checklist for verifying the inverter and its components upon receipt.
Identification of external parts and components of the inverter.
Diagrams and dimensions for open chassis and enclosed wall-mounted inverter types.
Guidelines for inverter installation orientation and required surrounding space.
Procedure for removing and attaching the terminal cover for wiring access.
Instructions for safely removing and attaching the digital operator and front cover.
Procedure for removing and attaching top and bottom protection covers.
Diagram illustrating the inverter's connection to main circuits and peripheral devices.
Details on applicable wire sizes, connectors, and terminal functions for main circuits.
Information on control circuit terminals, wire sizes, and wiring precautions.
Guidance on installing and wiring various option boards for the inverter.
Description of the digital operator's displays, keys, and functions.
Overview of inverter modes (Drive, Quick Programming, Advanced Programming, Verify, Autotuning).
Procedure for automatic motor constant setting for vector control.
Flowchart and steps for performing trial operation of the inverter.
Essential user constants that must be set for inverter trial operation.
Guidance on adjusting constants to resolve issues like hunting or vibration.
Explanation of the structure and elements of user constant tables.
Overview of the digital operator's display hierarchy and functions.
List of minimum user constants for inverter operation in quick programming mode.
Settings related to language, access level, control method, and initialization.
Constants related to V/f characteristics and motor setup.
Constants related to motor protection, stall prevention, and hardware protection.
Settings for motor autotuning parameters.
Selecting CT/VT, carrier frequency, and overload tolerance based on application.
Methods for inputting the frequency reference using various sources.
Explanation of input methods for selecting the Run Command source.
Explanation of methods for stopping the inverter.
Details on setting acceleration and deceleration times and S-curve characteristics.
Functions for protecting the machine and inverter from various faults.
Functions for continuing operation or auto-restarting after errors.
Functions for protecting the inverter and braking resistor.
Explanation of input terminal functions and switching operations.
Explanation of output terminal functions and their settings.
Explanation of individual functions used in special applications.
Explanation of digital operator functions and settings.
Explanation of inverter option functions.
Precautions for using the inverter with elevating machines like elevators and cranes.
Description of alarm functions including fault, alarm, operation, and autotuning errors.
Guidance on identifying and correcting inverter and motor operational issues.
Basic maintenance and inspection procedures for the inverter.
Guidelines for periodic replacement of inverter parts based on service life.
Procedure for replacing cooling fans in various inverter models.
Listing of standard inverter specifications based on capacity.
Specifications for available inverter options and peripheral devices.
Overview of the four control methods and their features.
Precautions for selecting, installing, setting, and handling inverters.
Precautions to be observed when using the inverter with various motor types.
Instructions for installation to comply with UL standards.
Points regarding conformance to safety and environmental standards in Europe.
Wiring examples for connecting braking units and peripheral devices.
