Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Gain access to PCB (use Insulation Mat as required)
Remove the flame sense lead from connection marked
X15 on the PCB
Remove the flame sense lead from connection marked
X15 on the PCB
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Measure voltage across the exposed terminal (X15) on the PCB and an adjacent earth terminal.
Expect approximately 230 V AC.
Expect approximately 230 V AC.
Isolate as per TOPs P4
and refit as necessary