Set Appliance State:

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

Observation:

Reset appliance.
(hold R until display changes)
Does the appliance reset and begin carrying out
self-check or does the fault code reoccur?
Choose from options below:
BOILER STARTS SELF-CHECK - Investigate possible overheat issues / circulation issues
BOILER STARTS SELF-CHECK - Continue fault finding through main XSol model
FAULT CODE REOCCURS
BOILER NOW SHOWS DIFFERENT FAULT CODE