Set Appliance State:

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

Observation:

Reset boiler.
If appliance resets and enters standby click HERE to diagnose using the full model.
If a different fault code is shown click HERE to return to fault code page.
If fault code reoccurs or appliance will not reset click HERE.