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)
Remove the ionisation lead from connector CN04 and make safe
Ensure NO demand
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure for AC voltage between connector CN04
on the main PCB to a suitable earth point.
Expect approximately 85 VAC.