Troubleshooting My Saeco GranBaristo indicates "max brew group" If your Saeco GranBaristo espresso machine indicates 'max brew group', discover how you can deal with this. Step by step solution Switch the machine OFF by the main switch on the back of the machine. Let it cool down for 30 minutes. Switch the machine back ON. Directly solve all displayed messages after the machine is switched on (i.e. water filling, missing water tank, etc.). Otherwise the 'max brew group' message might reoccur.