Set Appliance State:

Mains Power Off
Gas Off
Turn Hot Water Tap On
On/Off Switch in ON position
Mode selector switch to Summer
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Listen for a very faint clicking from Electronic Control Box.
NOTE 1:
Because of the configuration of the Electronic Control Box, the only practical method of ascertaining that the box is developing a spark is to listen for the faint clicking/sparking.
NOTE 2:
Sparking will be present for up to 10 seconds.
NOTE 3:
If the boiler goes to lockout, reset by turning the On/Off Switch to OFF for approximately 10 seconds and then ON again.