What should I do if my Omron Inverter is showing an OV DC Bus Overvolt error?
If your Omron Inverter displays an OV DC Bus Overvolt error, it indicates that the DC bus voltage has exceeded the overvoltage detection level. You can increase the deceleration time or connect a braking option. Also, check the power supply and decrease the voltage to meet the inverter’s specifications. Finally, check the braking chopper and resistor.
What does OL1 Motor Overload mean on my Omron VARISPEED F7 Inverter and how to fix it?
If your Omron Inverter is showing an OL1 Motor Overload error, it means the inverter’s I²t value exceeded the motor overload curve. Recheck the cycle time and the size of the load as well as the accel/decel times. Check the V/f characteristics. Also, check the setting of Motor Rated Current Setting.
How to troubleshoot OH Heatsnk Overtemp error on Omron VARISPEED F7 Inverter?
If your Omron Inverter displays an OH Heatsnk Overtemp error, it indicates that the temperature of the inverter's cooling fin exceeded the specified value. Check for dirt buildup on the fans or heat sink. Reduce the ambient temperature around the drive. If needed, replace the cooling fan(s).
What causes a GF Ground Fault error on an Omron Inverter?
If your Omron Inverter displays a GF Ground Fault error, it means the ground current at the inverter output exceeded 50% of the inverter rated output current. Remove the motor and run the inverter without the motor. Check the motor for a phase to ground short. Check the output current with a clampmeter to verify the DCCT reading. Check the control sequence for wrong motor contactor signals.
How do I fix an UV1 DC Bus Undervolt error on my Omron VARISPEED F7?
If the Omron Inverter is showing an UV1 DC Bus Undervolt error, it means the DC bus voltage is below the Undervoltage Detection Level. Check the input voltage and the wiring of the input terminals. You might also need to extend the settings.
What to do if my Omron VARISPEED F7 displays an EF External Fault?
If your Omron Inverter displays an EF External Fault, it is because both the forward and reverse run commands are input simultaneously for 500ms or more. To resolve this, check the external sequence logic to ensure that only one input is activated at a time.
Why is my Omron VARISPEED F7 showing OH1 Heatsink Max Temp and how can I resolve it?
If your Omron Inverter displays OH1 Heatsink Max Temp, it means that the temperature of the inverter’s heatsink exceeded 105 °C. Check for dirt build-up on the fans or heat- sink. Reduce the ambient temperature around the drive. Replace the cooling fan(s).
What does OL2 Inv Overload mean on my Omron Inverter?
If your Omron Inverter displays an OL2 Inv Overload error, it means that the inverter output current exceeded the inverter’s overload capability. Recheck the cycle time and the size of the load as well as the accel/decel times. Check the V/f Characteristics. Check if the inverter rated current matches the motor rated current.
What to do if my Omron VARISPEED F7 Inverter shows an OC Over Current error?
If the Omron Inverter displays an OC (Over Current) error, it means the inverter's output current exceeded the over-current detection level. First, try removing the motor and running the inverter without it. If the issue persists, check the motor for a phase-to-phase short. Also, verify the acceleration and deceleration times. Finally, inspect the inverter itself for a phase-to-phase short at the output.
What does PF Input Phase Loss mean on my Omron VARISPEED F7 Inverter and how to solve it?
If your Omron Inverter displays a PF Input Phase Loss error, it indicates too big DC bus voltage ripple. Tighten the input terminal screws and check the power supply voltage.
General| Cooling Method | Forced air cooling |
|---|---|
| Input Voltage | 200-240V AC (3-phase), 380-480V AC (3-phase) |
| Control Method | V/f control, Sensorless vector control |
| Frequency Range | 400 Hz |
| Communication Protocols | DeviceNet, Profibus DP |
| Overload Capacity | 150% for 60 seconds |
| Protection Features | Overcurrent, overvoltage, undervoltage, overload, short circuit, overheating |
| Operating Temperature | -10°C to +50°C |
| Storage Temperature | -20°C to +65°C |
| Humidity | 5% to 95% (non-condensing) |
| Altitude | Up to 1000m above sea level |
| Dimensions | Varies by model |
| Weight | Varies by model |
| Braking Unit | Built-in (for certain models), optional external unit |
Introduces the Varispeed F7 series, its applications, and available models.
Provides guidelines for selecting and controlling the installation site for optimal conditions.
Shows the overall connection diagram of the inverter and its main circuits.
Details applicable wire sizes and closed-loop connectors for main circuit terminals.
Covers wire sizes and connections for control circuit terminals.
Describes the displays and functions of the digital operator, including keys and status indicators.
Explains the inverter's modes and how to switch between them.
Outlines the step-by-step procedure for performing trial operation and basic settings.
Details procedures for application confirmation, power ON, and checking display status.
Lists user parameters, their descriptions, setting ranges, and control method compatibility.
Explains setting Heavy/Normal Duty modes and their impact on carrier frequency and overload.
Describes fault detection, alarm detection, operator programming errors, and auto-tuning faults.
Provides guidance for troubleshooting parameter setting or motor operation issues.
Lists standard inverter specifications by capacity and model.
Provides detailed specifications for 200V and 400V class inverters, including electrical data.
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