Set Appliance State:

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

Observation:

On power up the Display should show the current Flow temperature and depending on the "Summer/Winter" setting a radiator symbol.
If the radiator symbol is not displayed press the "Mode" button to change to winter mode.
Does the Display show the information described?
If a fault code is displayed please click here to go to the Fault Code List.