Set Appliance State:

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

Observation:

Reset lockout as necessary.
Allow fan to run and ignition sequence to commence.
Can sparking be heard?
Note:
After 5 attempts the boiler will go to lockout. To reset the boiler switch the boiler On/Off switch Off then back On.
Sparking can be very quiet on this appliance. Click HERE for a test to confirm whether sparking is present or not.