Set Appliance State:

Mains Power Off
Gas Off
Set Multimeter to AC Volts Set meter to measure AC Volts
Selector Switch OFF
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Measurement:

Test 1:
Measure approximately 24V AC across connector CN1 connections 6 (White) and 7 (Red).
Test 2:
Measure approximately 6V AC across connector CN1 connections 1 (Purple) and 2 (Orange).