Electrolux Dishwasher Fault. End indicator flashes and beeps 1 time every 5 seconds.

Electrolux Dishwasher Real life xxl. Model ESL 7220RO. The troubleshooting section of the manual with reference to the end indicator flashes 1 time intermittently and acoustic signal sounds 1 time intermittently, referred to the problem being ‘The appliance does not fill with water’. In my case it was filling with water then after 1 minute the water drained out. This whole process from closing the door to going into fault mode lasted approx 2 minutes.