Set Appliance State:

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

Observation:

Add pressure to system whilst observing the boiler pressure gauge.
Can the pressure gauge be seen to increase as pressure is added, if yes continue adding pressure until 1 - 1.25 bar is reached.
If the pressure gauge does not increase as pressure is added choose option "PRESSURE GAUGE DOES NOT CHANGE WHEN PRESSURE ADDED" from below.