# Pre run checks on the MiniSeq

During the MiniSeq pre-run checks, the instrument will evaluate the following:

* System Checks
  * Doors Closed
  * Consumables Loaded
  * Required Software
  * Instrument Disk Space
  * Network Connection
  * Network Disk Space
* Temperature
  * Temperature Ramp
  * Temperature Sensors
  * Fans
* Imaging System
  * Imaging Limits
  * Z step-and-settle
  * Bit Error Rate
  * Flow Cell Registration
* Reagent Delivery
  * Valve Response
  * Pump

Note: If a pre-run check fails, the reagent cartridge Integrated radio-frequency identification (RFID) is not locked and can be used for a subsequent run.

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #3892), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000003892%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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