Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to AC Volts Set meter to measure AC Volts
Gain access to PCB (use insulation mat as required)
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure the AC volts at PCB connector X3 from the brown wire (pin 1) and blue wire (pin 2) to Earth.
The voltage measured should conform to the table below:
WireExpected Voltage
Brown to EarthApprox. 240v
Blue to EarthLess than 15v