Set Appliance State:
Gas On; Pilot On
Set Multimeter to AC Volts 
Isolate Mains Power to appliance as per TOPs P4
Gain access to PCB (use insulation mat as necessary)
Gain access to PCB (use insulation mat as necessary)
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Measure voltage between connector A8 tracker-side, top right on the PCB and a suitable earth.
Voltage should read approx 180V AC.
Is the voltage as expected?
Voltage should read approx 180V AC.
Is the voltage as expected?
Isolate as per TOPs P4
and refit as necessary