You can manually trigger a backup of settings via the "Save data" option in the same menu.
If the card is corrupted, it must be replaced. Kaeser systems often require specific, industrial-grade SD cards to function properly, particularly because they are exposed to high vibrations and temperatures [3].
The physical SD card has its write-protection switch toggled to the "Locked" position.
Switch off the main isolator to remove power from the Sigma Control panel.
What is the of the SD card currently in use? kaeser sd card write error top
Copy any existing files (like .log or .par files) to a temporary folder on your desktop.
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Do not buy a cheap, retail-grade SD card meant for digital cameras or smartphones. Consumer cards use TLC (Triple-Level Cell) flash memory, which cannot withstand the constant write cycles and heat of an industrial compressor. Instead, purchase an Industrial-Grade SLC (Single-Level Cell) or pSLC SD card . Industrial cards feature:
It allows service technicians to upload new firmware versions to optimize machine performance. You can manually trigger a backup of settings
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It saves custom settings, pressure profiles, and operational parameters so they aren't lost during a power outage or system reset.
When this warning pops up on the controller display, the compressor usually continues its structural cycle, but data logging halts. Resolving this issue immediately protects your machine's service history, facilitates fast troubleshooting, and avoids high service costs. 📋 Direct Troubleshooting Matrix
Air compressors vibrate constantly. Over months or years of operation, these micro-vibrations can cause the SD card to back out of its spring-loaded slot slightly. If the pins lose contact with the motherboard, the controller loses its write path. 4. Contamination of Gold Contacts The physical SD card has its write-protection switch
to ensure compatibility with the Sigma Control 2 file system. Formatting Issues
Are you using an or a third-party replacement?
typically indicates the controller cannot save operational data or software updates to the internal SD card. 🛠️ Common Causes & Fixes
Shut down the compressor safely using the controlled stop sequence.
Have you checked the position of the on the card?
