Set Appliance State:

Mains Power Off
Set Multimeter to AC Volts Set meter to measure AC Volts
DHW Selector in Maximum (+) position
CH Selector in Minimum (-) position
ON/OFF Switch in ON position
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Measurement:

Appliance will start self check sequence.
Measure the voltage across the blue and brown wires of the pump plug (do not remove plug).
Expect mains voltage after a delay of 4 seconds for approx. 25 seconds.