> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/instrumentation/nextseq-500-550/instrumentation-nextseq-500-550-troubleshooting-list/000001389.md).
# Troubleshooting RheodyneValve error on NextSeq 500/550
The following error on the NextSeq 500/550 indicates that there is an issue regarding the sippers controlled by the valves. The Rheodyne valve is not prone to failure, and this typically results from a transient communication error.
**Error in Fluidics.FlowCellFluidics1.LanePump.IxPassThroughRheodyneValve1: Reinit while recovering from error””. Originally caused by” Timeout waiting 60000ms within EventToBclockingConverter.WaitForData().**
**Troubleshooting steps:**
1. Power cycle the NextSeq 500/550.
2. Run the ‘Valve Response Test’ portion of the System Check.
1. Select **Manage Instrument** > select **System Check**.
3. Perform a manual quick wash for further testing.
* If the error does not recur, the instrument is cleared for use.
* If the error comes back during initialization, system check, or during the wash, contact [Illumina Technical Support](https://www.illumina.com/company/contact-us.html#/).
For further information, search for Knowledge Base articles **How to Perform a NextSeq 500/550 Power Cycle** and **How to perform washes on the NextSeq 500/550.**
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| *For any feedback or questions regarding this article (Illumina Knowledge Article #1389), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000001389%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |
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