Set Appliance State:

Gas Off
Isolate Mains Power to appliance as per TOPs P4
CH Demand
Disconnect the ignition lead from terminal 3 on the spark generator and position as shown in the image
(ignition lead just off the terminal inside the spark generator)
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Reset appliance if required.
(press and hold the power button for 4 seconds then release)
Allow fan to run and ignition sequence to commence.
As the appliance goes through repeated ignition attempts can sparking be observed between the ignition lead and the spark generator terminal?
Note:
Appliance may enter lockout during test, reset as necessary until test complete.