The message "" on a Kaeser compressor controller (typically the Sigma Control 2 ) indicates that the system is unable to record data to the inserted memory card. Immediate Causes & Remedies
: If a new card is inserted but not recognized, it may have the wrong file format (e.g., NTFS instead of FAT32).
Older Sigma Control units often have a "ceiling" for storage capacity. Use an Industrial Grade SD card (SDHC). kaeser sd card write error top
Before beginning any work on the controller, you must:
Before grabbing a screwdriver, it is critical to understand the phrasing of this error. Kaeser Compressors (known for their rotary screw technology) often use modular control systems. The message "" on a Kaeser compressor controller
compressor controllers when the system cannot write data, update software, or save event logs to the memory card . This direct troubleshooting guide outlines why this error happens, how to clear it, and how to prevent costly downtime. Direct Summary of Error Code 0300 W Error Code Controller Message Primary Cause Immediate Remedy SD card write error
Navigate to the diagnostic or data log menu to confirm that the write error warning has cleared. Preventative Best Practices for Industrial SD Cards Use an Industrial Grade SD card (SDHC)
Check the total capacity. For optimum compatibility with Kaeser Sigma Control 2, use cards that are in size.
The physical SD card housing features a tiny slider switch on the left edge. Vibrations inside the compressor enclosure can cause a loose switch to slide down into the "Lock" position.
Going forward, always follow the correct procedure to eject the card. According to the Kaeser manual:
: If the error is software-related, switching off the main power for ~30 seconds and restarting can sometimes clear persistent communication faults. Air Solutions Canada 3. System Impact