Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Gas On
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Run the appliance in chimney sweep mode.
To put the appliance into chimney sweep mode press the + and - buttons together for 5 seconds then release, to exit service mode click cancel.
Can the combustion be adjusted to within the correct parameters?
Note:
1. Refer to manufacturer’s instructions for how to adjust combustion and expected readings.
2. Carry out performance test in accordance with operational procedures.