The drive is protected against short circuit between the output phases and from output phases to ground. When a short circuit is detected, the inverter indicates an error message SCF1
Causes
- Short circuit at the inverter output.
- Short circuit or earth fault in the motor or motor cable.
Remedies
- Verify the cables connecting the drive to the motor, and the motor insulation (Megger test with the motor disconnected from the drive).
- Verify motor nameplate data has been entered properly in the drive and that an autotune has been completed (when motor is at room temperature).
- Go to Diagnostics menu and perform the IGBT test with motor when the motor is connected. If Not OK, then disconnect the motor and perform the IGBT test w/o motor.
- Reduce the switching frequency.
- Connect a load reactor (output choke) between the drive and the motor.
- Test the drive in an open loop mode (motor disconnected) to verify that the drive can operate without the error and generate balanced output voltages at several different speeds:
- Disconnect motor from drive and deactivate Output Phase Loss [Complete settings] [Error/Warning handling] [Output phase loss],
- Change Motor control type [Complete Settings,/Motor parameters to U/F VC 5pts
- run the drive with no motor connect.
- Check for balanced output voltages (phase to phase) at several speeds.
NOTE: the testing should only be performed by a qualified person. Consult the Instruction Bulletins for the specific product for details including all caution and warning messages.
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If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions: Frequently Asked Questions - Schneider Electric (se.com)
If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us at drive.products.support@se.com to create a case with our Technical Support Team.
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Released for:Schneider Electric USA
