Set Appliance State:

Mains Power Off
CH Demand
Gas On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Mains reset switch On.
Allow fan to run.
Observe burner.
After approximately 10 seconds does sparking occur and burner ignite?
Note:
Boiler should attempt to ignite at least 3 times before going to lockout. This should take approximately 1 minute.