This error message can occur on the UltiMaker S5 or S7 in combination with the Material Station. If you see this error, the detected internal relative humidity is too high.
Explanation
The dehumidifier is located at the back on the inside of the Material Station. It contains several different components that allow it to maintain a low relative humidity for the materials and to self-regenerate. In case of ER68, the Material Station has detected that the relative humidity inside the chamber is high, meaning over 40% for an extended period of time.
This error will not interrupt the printing process and can be dismissed, but it is a warning that the quality of the materials may degrade, especially moisture-sensitive materials such as PVA.
Tip: The Material Station normally aims to keep the internal relative humidity at about 25%. Learn more about humidity control in the Material Station in this article.
Troubleshooting
There can be several reasons for the high humidity inside the Material Station:
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Open door
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Always ensure to keep the door of the Material Station closed, except when loading or unloading spools of material.
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Humid environment
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Place the Pro Bundle in a suitable location. In very humid environments, the dehumidifier inside the Material Station will struggle to maintain an RH of 40% as more regeneration cycles are required.
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Missing seals
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The door of the Material Station is not sealed air-tight, but there should be no gaps at the sides. Ensure the hard plastic seals are correctly installed. These are located on each side of the chamber. If one is missing, contact support or your local reseller for a replacement.
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| Dislodged exhaust | Rough handling or transport of the Material Station may have dislodged the exhaust at the back of the Material Station. If the moisture cannot properly be expelled, this can cause high humidity inside the Material Station. Check the exhaust opening at the back and contact support if it seems out of place. |
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After checking the Material Station and the environment as described above, power down the Pro Bundle by disconnecting the power cable from the Material Station. After a few minutes, reconnect the power cable and turn on the printer.
Note: The ER68 error message will not appear during the first 12 hours after the Material Station is powered on. This is to give the dehumidifier enough time to restore the relative humidity inside the chamber and regenerate. If it does show again immediately, please update your firmware.
Need further support?
If the error continues to appear after taking all steps on this page, or if you see ER67 instead, there could be a hardware problem with the dehumidifier. Please contact support and include your log files for further assistance.
Tip: If you have not already enabled this, consider allowing your printer to share anonymous data over the network. This provides valuable insights into internal printer processes and helps UltiMaker improve our products, such as reducing the number of error occurrences.
