Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to AC Volts Set meter to measure AC Volts
CH Demand
Gain access to PCB (use Insulation Mat as required)
Link pins 1 and 2 of five pole connector on mounting frame
Selector switch OFF
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure Mains voltage across connectors CN4 connection
5 (L Brown) and CN3 connection 2 (N Blue).
Note:
This test bypasses all external controls
Expect mains voltage.