Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Ensure Central Heating Turned OFF
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Reset the appliance to ensure it is not in lockout.
The appliance should now complete a self check of approx. 30 seconds.
During this the fan should run at a constant low speed.
The pump should begin to run approx. 3 seconds after the
power is turned on and then run for a further 10 seconds.