Set Appliance State:

Ensure NO demands
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Reset appliance, press and hold the reset button until the chimney
sweep button led flashes rapidly, then release the reset button.
The appliance will carry out a self-check, during this time the pump
will purge (PULSE) for approximately 4 minutes.
If the self-check has completed successfully, the reset button will be
the only LED illuminated (green) after the pump purge has completed.