Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to DC Volts Set meter to measure DC Volts
Gain access to PCB (use Insulation Mat as required)
Remove fan PCB cover if required
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

This test can be carried out during the purge cycle.
Measure the DC voltage between the pin 6 (brown) on the fan connector to a suitable earth point.
Expect approximately 6.3 Vdc.