Set Appliance State:

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Test 1:
Determine whether the temperature near the flow thermistor
is above 5°C, using a temperature probe if necessary.
If the temperature is at or below 5°C
select that option below.
Test 2:
Check the temperature being shown
on the boiler display, is it also above 5°C.