Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to AC Volts Set meter to measure AC Volts
Turn Hot Water Tap On
Remove the pump cable connector from the PCB and make safe
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Allow self check to complete.
Measure for AC voltage on pins 3 and 4 where the
pump cable connector was fitted.
Expect mains voltage.