Before beginning any work on the controller, you must:
Locate the key (often represented by a checkmark or specific icon) on the Sigma Control 2 panel.
Navigate to the diagnostic or data log menu to confirm that the write error warning has cleared. Preventative Best Practices for Industrial SD Cards
At this point, you should contact an authorized Kaeser service representative. Before calling, have the following information ready:
Industrial controllers undergo continuous data writing. Over years of thermal cycling and high-frequency data logging, the flash memory cells on the SD card wear out, leading to read/write operational failures. kaeser sd card write error top
The SD card slot on a is primarily used for: Manual updates of the controller software.
The Sigma Control uses a buffer IC to manage data flow to the SD card. If that chip is damaged by a static shock or voltage spike, the "Write Error" appears regardless of which card you use.
What is the exact (e.g., Sigma Control 2, Sigma Control Basic)?
The (Warning Code 0300 W) on a Kaeser compressor typically occurs when the Sigma Control 2 system is unable to record operational data or load updates. This is usually caused by a physical lock on the card or a failure in the card's file system. 🛠️ Quick Troubleshooting Steps Before beginning any work on the controller, you
Standard SD cards feature a mechanical slide switch on the left edge. If this switch is accidentally toggled downward into the "Lock" position during handling or routine maintenance, the controller cannot alter the file system.
Reinsert the prepared SD card into the unpowered Kaeser controller. Restore power to the electrical cabinet. Allow the Sigma Control system to boot completely.
Eventually, a sector on the card goes bad. The controller tries to write to that bad sector, the write fails, and the system throws the error. Because the system software (firmware) often resides on the same card, a write failure can corrupt the boot sequence, turning a simple memory error into a full system lockdown.
Before diving into troubleshooting, it's helpful to understand what the controller expects. According to official Kaeser documentation, the controller is typically looking for a standard SD/SDHC card. It requires the card to be formatted with a and must have at least 50 MB of free memory . Critically, the card's write protection must be deactivated , and the user must have Access Level 2 privileges to save data to the card. Many functions, like saving system configuration data, are performed via the menu path 5.6 <Configuration – Save data> . The Sigma Control uses a buffer IC to
Turn the controller back on. This forces the Sigma software to remount the drive and re-verify the write path. Step 4: Check and Reformat the SD Card (PC Required)
Standard SD or SDHC cards are supported; industrial-grade cards are recommended for longevity in high-vibration environments. 3. Clear the Warning Message
The SD card has reached its end-of-life or has hardware failure.