What happened?
This error is shown when the MMU unit has an old or incompatible firmware version. The printer will show you an expected firmware version for the MMU unit.
For example, this error can appear when using the old MMU2S firmware 1.0.6 or below in combination with the newer printer’s firmware, such as 3.13 or up on MK3S+.
How to fix it?
Make sure that you are using the correct up-to-date firmware for both the printer and the MMU unit: Firmware download.
If you are not sure which version you have, find the order number from the MMU unit, or take pictures of it, and send it to our Servizio clienti.
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