Set Appliance State:

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

Observation:

Press reset to cancel purge cycle countdown.
Does the burner Ignite and establish?
Note.
1. Sparking can be observed by looking through the sight glass.
2. The spark will be present at the burner so looking from the right
of the sight glass in towards burner is the best viewing angle.