Set Appliance State:

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

Measurement:

Reset appliance (hold down both arrow buttons until display changes).
If the fault code will not reset turn the mains power off and then back on again after 10 seconds.
Will the boiler reset using either method or does the fault code remain?
Please choose one of the following options:
BOILER RESETS (RETEST APPLIANCE)
BOILER WILL NOT RESET (FAULT CODE REMAINS) OR BOILER RESETS BUT FAULT CODE KEEPS REOCCURRING