Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to AC Voltage Set meter to measure AC Volts
CH Demand
Selector switch to CH
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure the voltage across the pump live connection 1 and the pump neutral connection 2 (blue and brown wires) at connector X3 (two pin connector marked PUMP) left of centre on the PCB.