Your Cafitesse Excellence Compact Black displays fault code 18 (large leakage). If there is a major leak, you will see a large puddle of water in and/or around your coffee machine. You can't fix this yourself, unfortunately, but you can prevent the situation from getting worse.
Follow the 2 steps below and contact the troubleshooting service.
Unplug the power chord
To prevent a short circuit, unplug the power cord.
Shut off the water supply
Shutting off the water supply will prevent water from entering the coffee machine.