Set Appliance State:

Turn Hot Water Tap On
Boiler in service mode
Gas On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Carry out a FGA on the appliance in accordance with the manufacturers instructions and current operational procedures.
Notes:
Refer to adapt for how to use the appliances combustion mode.
If the burner drops out in minimum output mode follow the link below: