The LED display of the SP600 hard floor cleaner provides you with various information:
| None of the three waves light up | Dry mode |
| 1–3 waves show green lights | Moistening levels 1–3 are activated |
| All 3 waves flash green | Initially moistening started |
| All 3 waves flash orange | Fill water tank |
| All 3 waves light up red | An error has occurred |
| All 3 waves flash red | Water sucked into system |