SMEG error codes....
E1 - 1st flashing, 5th lit - flood protection system activated.
E2 - 2nd flashing, 5th lit - safety pressure switch activated.
E3 - 1st, 2nd flashing, 5th lit - no heat in time allowed.
E4 - 3rd flashing, 5th lit - temperature sensor fault.
E5 - 1st, 3rd flashing, 5th lit - no fill.
E6 - 2nd, 3rd flashing, 5th lit - no drain in time allowed.
E7 - 1st, 2nd, 3rd flashing - flow meter detected when not fitted - reset required.
E9 - same code as E1, so how you tell the difference is beyond me, but is a related fault to E1 + E2.