Set Appliance State:

ECO mode ON (ECO on display)
Turn hot water tap ON with a flow rate of 2 l/min
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Does the appliance recognise a DHW demand ?
Note.
DHW demand is recognised when a water droplet flashes under the tap symbol on the display.