Set Appliance State:

Mains Power Off
Turn Hot Water Tap On
CH temperature selector to 0 position
DHW temperature selector 0 position
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Reset lockout as necessary.
Allow appliance to return to standby mode
DHW temperature selector to maximum position
With a flow rate at the tap of approximately 11.9 l/minute is there a temperature rise of approximately 35°C and is operation satisfactory?