Code F00002: Overvoltage
Issue Description & Safety Warning
The Siemens SINAMICS G120 CU240S Drive has triggered a critical Overvoltage 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
Reaction: OFF 2 Acknowledge: Quit fault eg. via DI2 Cause: - Main supply voltage too high - Motor is in regenerative mode Remedy: Check the following: - Supply voltage (p0210) must lie within limits indicated on rating plate. - Vdc controller must be enabled (p1240) and parameterized properly. - Ramp-down time (p1121) must match inertia of load. - Required braking power must lie within specified limits. Note: Regenerative mode can be caused by fast ramp downs or if the motor is driven by an active load. - r0949 = 0: HW reported - r0949 = 1 or 2: SW reported Higher inertia requires longer ramp times; otherwise, apply braking resistor.
Source: SINAMICS G120 Control Units CU240S Faults and Alarms (Edition 05/2007)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Siemens SINAMICS G120 CU240S Drive Alarms
Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code F00002 on the SINAMICS G120 CU240S Drive identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 108 Siemens SINAMICS G120 CU240S Drive codes.
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