Set Appliance State:

Mains Power Off
Boiler ON/OFF Switch OFF
CH Temperature Selector OFF
DHW Temperature Selector OFF
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Boiler ON/OFF Switch ON.
With no demand and the ambient temperature above 9 degrees C, does the Boiler attempt to run?
Note:
The appliance has an Auto-frost Protection System. If it senses a primary temperature of 8 degrees C, then the Pump will run for 4 minutes to average the system temperature.
If the primary temperature is less than 5 degrees C, then the Boiler will fire in CH mode until system reaches 30 degrees C. This is normal operation.