Code P11-PRE-11241: P2 Power Supply
Issue Description & Safety Warning
The Allen-Bradley PowerFlex 750 Drive has triggered a critical P2 Power Supply alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Type: Resettable Fault Coast A power supply input voltage (24V input and/or +/-12V internal supply) is operating outside of the acceptable range. • Check input power to the converter gate firing board. The following thresholds are used: 24V is below 20.1V 12V is below 10.0V 12V is above 15.0V -12V is above -10.0V • If the power supply voltage is within the acceptable range, replace the converter gate firing board.
Source: Allen-Bradley PowerFlex 750-Series AC Drives Programming Manual (750-PM001)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Allen-Bradley PowerFlex 750 Drive Alarms
Allen-Bradley controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code P11-PRE-11241 on the PowerFlex 750 Drive identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Allen-Bradley's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 663 Allen-Bradley PowerFlex 750 Drive codes.
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