How can I prepare a coffee machine for a long period without use?

Use the manufacturer’s instructions for the exact model, rather than assuming that unplugging it or emptying the tank is enough. Look in the manual’s sections on storage, transport, cleaning, water system, and restarting after inactivity. Note whether the directions apply to storage, moving the machine, or both; those situations may not have identical steps.

The supplied Miele CM6310 manual gives model-specific extended-storage or long-distance-transport steps: empty and clean the bean and water containers, evaporate the coffee system through its on-screen procedure, and clean the drip tray and waste container. It warns that the procedure releases hot steam and presents a burn hazard, and says to pack the machine only when clean and dry. These instructions are for the CM6310, not a universal procedure. [S1]

If you cannot find a storage procedure, do not guess how to drain or run a cleaning cycle. Record the model number and consult the manufacturer’s manual or support for the missing direction.

Make a model-specific parts list before doing anything. Check the manual for instructions about the water tank, bean container, drip tray, grounds or waste container, brewing unit, filters, milk components, and any other removable parts your machine actually has. Do not remove a component unless the manual says it is removable and explains how to handle it.

Pay particular attention to whether the manufacturer calls for emptying, washing, rinsing, drying, or a machine-care cycle, and whether those steps are for storage or for restarting. For the Bosch 800 Series TPU6 described in its manual, cleaning after a long period without use includes the appliance and moving parts such as the brewing unit or water tank; it also describes machine-care cycles and rinsing the tank with fresh, clean water. Those are cleaning directions for that Bosch model family, not a general storage recipe or complete restart procedure for every coffee machine. [S2]

A useful note while reading is: “Part or system / manual’s exact instruction / when to do it / page or screen reference.” If a term or step is unclear, preserve the wording and ask the manufacturer rather than substituting a method from another model.

Find the manual’s return-to-use directions before switching the machine on. Follow its order for inspecting and reinstalling parts, refilling the tank, rinsing or cleaning, and any startup or care cycle—but only where those steps are specified for your model. Check whether the manual sets a condition for using the machine again, such as completing a named cycle; do not infer one from another brand’s instructions.

The available Bosch excerpt addresses cleaning after a long period without use, including rinsing its tank with fresh, clean water, but it does not establish every restart step, a universal storage method, or instructions for other machines. [S2] The Miele excerpt describes its CM6310 storage procedure but does not establish a universal restart sequence. [S1]

If the manual is missing or does not cover the situation, write down the model and what was done before storage, then ask the manufacturer for the appropriate return-to-use directions. Do not run an unclear hot-steam or water-system procedure just to see what happens.

Copy this and fill it in from your machine’s manual. Leave a field blank rather than guessing:

Machine make/model: [from rating label or manual] Storage period or situation: [planned duration / transport / other] Manual section and page: [reference] Before storage: [listed parts and exact manual steps] Water system: [manual instruction, or “not stated”] Safety warning or special condition: [manual wording] Restart steps: [listed steps, or “not stated”] Question for manufacturer: [anything unclear]

For example, your entry might say “Water system: [manual instruction, page __]” rather than copying the CM6310 evaporation step onto a different machine. The record is a reminder, not a substitute for the model’s instructions.