Cause : Line phase failure in main circuit comes when the drive detects an issue with the AC line input, specifically when one or more of the phases is missing or has a voltage outside the acceptable range.

siemens fault 30011 indicates a Line phase failure in main circuit. This means the drive has detected an issue with the incoming AC power supply.

Troubleshooting Steps:

Follow these steps to correct siemens fault 30011:

• Check Input Fuses: Inspect the input fuses to the drive (if present) to see if any have blown. Replace any blown fuses with the correct type and rating.
• Measure Input Voltage: Using a multimeter, carefully measure the AC voltage between all three phases of the incoming power supply at the drive terminals.
• Check Line Cable Connections: Ensure that all incoming power cables are securely connected to the correct terminals on the drive.
• Monitor DC Link Voltage (if possible): If you have the appropriate tools or can access the drive's parameters, monitor the DC link voltage for excessive ripple or instability.
• Hardware test: Check drive hardware using multimeter.

How to Reset the F30011 Fault:

Once the underlying cause of the fault has been identified and resolved, you can typically reset the F30011 fault by:

• Pressing the RESET button on the drive keypad.
• Cycling the power to the drive (turning it off and then back on).
• Sending a reset command from the control system (if configured).