Power unit: Internal software error

What does F30950 mean?

An internal software error has occurred within the power unit. The fault value (r0949) provides information about the fault source, intended for internal Siemens troubleshooting. This indicates a critical software malfunction within the power unit, preventing normal operation. The risk is complete drive failure and inability to operate the connected equipment.

• Corrupted firmware image on the power unit's flash memory due to an interrupted update process or power fluctuation during write operations.
• Transient memory access error (e.g., RAM corruption) caused by electromagnetic interference or unstable internal power supplies on the control board.
• Hardware malfunction within the power unit's microcontroller (e.g., CPU, watchdog timer circuit) leading to unexpected program execution.
• Critical internal register or configuration parameter corruption due to an ESD event or aging hardware components.
• Communication watchdog timeout between internal power unit components (e.g., DSP and microcontroller) caused by excessive processing load.

Click steps to track your progress.

1. 1

   Record the fault value r0949 and provide it to the manufacturer's technical support for specific diagnostic interpretation.

2. 2

   Perform a power unit reset by completely cycling the main supply voltage (e.g., 400VAC) and auxiliary control voltage (e.g., 24VDC).

3. 3

   Verify the firmware version of the power unit against the manufacturer's latest release and perform an update if available and applicable.

4. 4

   Check the stability of all internal low-voltage DC supplies (e.g., +3.3VDC, +5VDC, +15VDC) on the power unit control board using an oscilloscope for ripple.

5. 5

   Inspect the power unit control board for any physical damage, component overheating, or signs of liquid ingress that could affect internal electronics.