- When the printer cover is open, for safety reasons, it will display "Close a cover," and operation will be disabled. Please close the front cover and the upper and lower maintenance covers again.
![](https://d3demexscer4mv.cloudfront.net/archives/046/202402/68ce8e56cb791ddeb9e227f6cdf8fbfc94d5b3c69d7016de994f986dc94bc717.png)
* The open/close status of the cover is detected by a sensor.
When you close the front cover and the upper/lower maintenance covers,
each sensor is pressed and it recognizes that the covers are closed.
![](https://d3demexscer4mv.cloudfront.net/archives/046/202402/67248a233406e7883810780524628cf93a25e9797f54cbe06a4047b20c8ac5fc.png)
![](https://d3demexscer4mv.cloudfront.net/archives/046/202402/fc4697a3c687fc1ae5086370e514e5a80e2372309caf5a7873283a66fba6f521.png)