Err 11.0 Control power supply under-voltage fault in panasonic drive

Err 11.0 Control power supply under-voltage fault in panasonic drive indicate that the voltage on the Control Power Supply terminals—the logic side of the drive—has dropped below the minimum required threshold.

Cause: Control power supply voltage (L1C, L2C) dropped below the specified value (approx. 80V for 100V class, 140V for 200V class) or instantaneous power failure occurred.

Remedy:

• Measure voltage across terminals L1C and L2C using a multimeter.
• Check for heavy inrush current from other equipment on the same line causing voltage dips.
• Verify the power capacity of the transformer/supply is sufficient.
• If voltage is correct (e.g., 220VAC) and error persists, the internal power circuit is defective; replace the driver.