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PrimaDonna ESAM6620Message: Descaling needed. Press "OK" to start (~50 min)

PrimaDonna ESAM6620

Message: Descaling needed. Press "OK" to start (~50 min)

Try this solution

Press "OK" to start descaling, or "ESC" to descale later.

Possible cause:
The coffee machine must be descaled.

Follow the video guide:

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