Cup tray or drip tray sensor error; the machine refuses to brew and indicates a tray issue.

Safety first: Unplug the machine before removing trays or opening covers.

Tray and sensor cleaning:

• Remove the drip tray and used capsule container; wash and dry thoroughly.
• Inspect the tray for a small float or magnet; ensure it moves freely and is not stuck with coffee residue.
• Clean the sensor window or area on the machine where the tray is detected.

Sensor checks:

• Reinsert the tray firmly and listen for any click from a reed switch (if audible).
• If the error persists, open the housing and locate the reed switch, Hall sensor, or optical sensor associated with the tray.
• Check for broken wires or loose connectors; reseat as needed.
• Test the reed switch with a magnet and multimeter; replace if it does not change state.

In many cases, replacing the tray (with a new float/magnet) or the small sensor board resolves the issue. Avoid bypassing safety sensors permanently.