Code P11-CONV-11215: C2 Line Dip
Issue Description & Safety Warning
The Allen-Bradley PowerFlex 750 Drive has triggered a critical C2 Line Dip 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: Alarm 1 The bus voltage has fallen below the value specified in P451 [Pwr Loss A Level] or P454 [Pwr Loss B Level] (port 0) minus 20 volts. Until the converter has established communications with the main control board, this value defaults to 180V below the converter bus memory. The converter stops firing the SCRs until the nominal value of the DC bus voltage for the present AC line voltage is within 60 volts of P12 [DC Bus Memory] (port 0). If the line dip condition persists for more than 60 seconds the alarm becomes a fault. • Verify the power wiring connections. • Compare the actual DC bus voltage to the value displayed in [Cn DC Bus Volt]. If the values are different, replace the converter gate firing board. Resettable Fault Coast Y Y
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-CONV-11215 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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