Set Appliance State:

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Enter the installer/service mode by pressing and holding the tap and radiator symbols simultaneously for 3 seconds.
Select "settings" > "hydraulics"
Under the hydraulics menu there are 4 settings to be configured, check these are correct for the appliance / installation.
Low loss header - should be set as appropriate for the installation.
DHW configuration - should be set to "3 way valve installed".
Heating circuit 1 configuration - should be set to "no heating circuit 1"
Pump Configuration - should be set to "heating pump"
Are the settings appropriate?