The water tank was not filled up to the MAX level with fresh water before you started the rinsing cycles.
Follow the steps:
- Rinse the water tank and fill it up to the MAX level with fresh water
- Place a container under the hot water/steam wand and one under the dispensing spout
- The selector switch is still in the hot water/steam position
- Put the water tank back in the machine. Note: As soon as the water tank is placed back the machine starts dispensing water through the steam wand
- Repeat steps 1 till 4 until the DESCALING light and the EXCLAMATION light turn off and the machine automatically goes into standby mode