Set Appliance State:

Mains Power Off
Ensure there is no demand for either CH or DHW
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Allow the boiler to complete its power on self-check.
The pump and fan may run for a short period of time (up to 30 seconds) and should then stop.
The display should then show the current boiler temperature, however, if a fault code is displayed CLICK HERE to go to the fault codes page.
CLICK HERE for information on resetting the appliance.