Set Appliance State:

Mains Power Off
CH Demand
CH temperature control to max
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

The chimney sweep led will flash orange at every heating demand. The number of flashes will correspond with the output of the boiler as shown in the table below, e.g. 4 orange flashes = 21KW.