Set Appliance State:

Mains Power Off
Turn Hot Water Tap On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Allow boiler to commence its ignition sequence and burner to ignite.
Does burner remain alight and sparking cease?
Note:
If flame does not establish and sparking cease then lockout will occur after approximately 10 seconds.
If lockout occurs then lockout reset will have to be depressed.