Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
CH Demand
CH temperature control to max
Attach temperature clamp to flow pipe
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Reset appliance, press and hold the reset button until the chimney
sweep button led flashes rapidly, then release the reset button.
Allow boiler to ignite and run for CH.
At approximately 70 - 80°C flow temperature, the boiler should either maintain the flow temperature of 70 - 80°C or shut down, without temperature protection status code occurring.