Set Appliance State:
Set Multimeter to AC Volts 
Isolate Mains Power to appliance as per TOPs P4
Open the control box by removing the two securing screws and lower the access door
Draw the control board forward to allow access to the PCB
Open the control box by removing the two securing screws and lower the access door
Draw the control board forward to allow access to the PCB
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Measure the voltage across the flame detect connector JP2 connection 1 (white wire) and a suitable earth point.
Approximately 225 volts AC should be present.
Approximately 225 volts AC should be present.
Isolate as per TOPs P4
and refit as necessary