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Tiffany DavisSep 7, 2025
What does 'Backup error' mean on my Siemens SITRANS TS500?
- MMrs. Nicole Jones MDSep 7, 2025
If your Siemens Temperature Controller displays 'Backup error', it means a sensor error is detected at the backup sensor, and no backup is available. Unplug and reconnect the sensor cable. Check if the sensor is operated out of specified limits. If the problem persists, replace the sensor.