Set Appliance State:

Mains Power Off
Set Multimeter to AC Voltage Set meter to measure AC Volts
CH Demand
On/Off Switch On.
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure Mains Voltage across the PCB Switched Live (Red/White wire, connection 12) and the Neutral
(Blue wire, connection 7) on the PCB.